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Power Integrations

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FY2016 Annual Report · Power Integrations
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Power Integrations
2016 Annual Report

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Dear Fellow Stockholders, 

We delivered strong financial results in 2016, generating healthy cash flow along with double-digit growth in revenues and 
earnings. We also achieved a noteworthy milestone in the third quarter, surpassing $100 million in quarterly revenues for the 
first time ever (and then doing it again in the fourth quarter). For the full year, our revenues grew by 13 percent – more than
twice the growth rate of the analog semiconductor industry.1 We also introduced an impressive array of new products last 
year, broadening our portfolio of integrated circuits (ICs) for the power-supply, LED-lighting and IGBT-driver markets and 
increasing  our  served  addressable  market  (SAM)  to  more  than  $3  billion.  With  a  robust  pipeline  of  new  products  still  to
come in 2017 and beyond, we believe our SAM will soon exceed $4 billion, giving us ample opportunity to grow for the
foreseeable future. Moreover, we believe the big-picture themes that underpinned our growth in 2016 – energy efficiency,
faster charging for mobile devices, smarter homes and appliances, and more – will re
main operative not just for 2017 but for 
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years to come. 

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Our growth in 2016 was broad-based, coming from the communications, consumer and industrial end markets, each with its
own  unique  drivers.  In  communications,  revenues  grew  nearly  30  percent  for  the  year,  led  by  the  ongoing  ramp  of  our
InnoSwitch™ products in smartphone chargers. With smartphones now performing more power-hungry functions than ever 
before, OEMs are increasingly demanding chargers that deliver far more power than the commoditized, low-power chargers 
that  were  standard-issue  just  a  couple  of  years  ago.  Rising  power  levels  create  serious  challenges  for  power  supply 
designers, requiring much higher levels of integration and energy efficiency in orde
r to maintain the small form factors to 
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which we’re all accustomed. Our InnoSwitch products satisfy these demands extremely well, and have been widely adopted 
by smartphone OEMs and their charger suppliers. InnoSwitch has ramped faster than any product in our history, growing 
from  just  $5  million  in  2014  to  more  than  $40  million  in  2016,  with  nearly  all  of  that  revenue  coming  from  smartphone
applications.  

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The  consumer  end  market,  our  largest  revenue  category,  was  also  a  major  contributor  to  our  growth  in  2016,  with  sales
increasing at a rate in the mid-teens. Growth was driven by appliance applications, where we not only enjoy strong market
share thanks to the inherent reliability that comes with integration, but where we are also capturing rising dollar content as 
appliances continue to evolve from mechanical machines into intelligent electronic devices.  

Industrial revenues also added to our growth in 2016, with sales rising at a mid-single-digit rate for the year. Here again, a
key  theme  is  the  “electronification”  of  products  that,  until  recently,  never  required  power  supplies.  For  example,  “smart” 
ing  and  load  management.
utility  meters  incorporate  electronic  displays  and networking  capabilities  to  permit  remote  read
Outdated lighting technologies are rapidly giving way to energy-efficient LEDs, which typically consume low-voltage DC
power  and  therefore  require  AC-DC  power  supplies  (known  in  the  lighting  industry  as  drivers).  Likewise,  products  like
scooters, bicycles and lawn equipment have historically been powered by liquid fuels, raw alternating current, or plain old 
manpower, but are now utilizing DC motors with rechargeable batteries. All of these changes create opportunities for Power
Integrations, and we are responding with products and sales strategies to make the most of them. 

a

We believe  all  of  these  themes  will  endure  well beyond 2016. Faster  charging  continues  to be one of  the  most  important 
trends in the mobile-device market, yet perhaps only a third of smartphones are now shipping with higher-power chargers. 
We expect this penetration rate to increase considerably over the next few years, particularly as new charging technologies 
such  as  USB-PD  with  Type-C  connectors  are  on  the  verge  of  mass  adoption.  And,  importantly,  the  adoption  of  faster 
charging is not simply a one-time conversion; while today’s ten-watt charger may seem fast in comparison to yesterday’s
five-watt model, that same charger will likely become a 15- or 20-watt charger before long. The higher the power goes, the 
r
t and the competitive positioning 
f
greater the opportunity for Power Integrations, both in terms of the available dollar conten
of our highly integrated ICs.

Meanwhile, the conversion of consumer appliances into sophisticated electronic devices has been ongoing for many years, 
but still has a long way to go. While most brand-name appliances now utilize basic electronic controls and displays – often 
powered by our ICs – the conversion to advanced features like electronically controlled motors and LED lighting (e.g., in
refrigerators) is still ongoing. Moreover, the incorporation of connectivity and other forms of electronic intelligence is just
beginning as appliances join the internet-of-things revolution. All of this adds up to a growing addressable market for Power 
Integrations, which we are well positioned to capture given our strong incumbent position in the appliance market.  

1 World Semiconductor Trade Statistics data, as reported by Stifel, Nicolaus & Company 

Similarly, in the industrial market, the trends described above are still in the relatively early stages. We expect meaningful 
growth in the years ahead in applications like chargers for “e-bikes” and power tools. And while LED light bulbs are now
commonplace, the conversion to LED lighting in commercial, industrial and street lighting is still in the early innings, not to
mention  the  incorporation  of  connectivity  and  other  forms  of  intelligence  in  lighting  systems.  Indeed,  the  greater  secular 
trend of home and building automation is quickly emerging as a revenue opportunity for us, and our products are now being
designed  into  a  variety  of  embedded  devices  such  as  connected  thermostats,  smoke  detectors  and  power  strips.  Such
applications demand reliability and low standby energy consumption, making them ideal targets for our products. 

While the drivers of last year’s growth are continuing into 2017 and beyond, we also expect to layer on new revenue streams
in the very near future. Our InnoSwitch products have already made a mark on the mobile-phone industry, but are now being 
designed into a wide range of other power-supply applications such as appliances, networking gear, and numerous industrial
applications, at higher average selling prices than we typically earn in these applications today, reflecting the unprecedented
level of integration offered by InnoSwitch ICs. Our next-generation InnoSwitch ICs will address higher power levels than
the first generation, enabling us to bring the benefits of InnoSwitch ICs to an even wider range of applications, including
TVs, computer monitors, power adapters for notebook computers and many more. 

Our new SCALE-iDriver™ family, introduced last May, is the first product arising from the combination of our low-power 
technology and our SCALE™ IGBT-driver technologies. This new product family, which incorporates the ground-breaking 
Fluxlink™  technology  that  lies  at  the  heart  of  our  InnoSwitch  products,  addresses  IGBT-driver  applications  between  10 
kilowatts  and  100  kilowatts,  including  industrial  motor  drives,  medical  equipment  and  commercial  solar  installations. 
Longer term, this product family will also enable us to compete in the automotive market, where the growth of the electric-
vehicle market is creating a need for highly reliable, energy-efficient power electronics for drive trains and charging stations.

d

From  a  financial  standpoint,  we  demonstrated  the  leverage in  our  business  model  in  2016,  growing  our  revenues  by  13
percent while our GAAP operating expenses rose at just half that rate, resulting in a meaningful expansion of our operating
margin. We generated $98 million in cash flow from operations in 2016 and exited the year with $250 million in cash and 
investments (and no debt) on our balance sheet – up more than $75 million from the prior year-end even after returning more 
than $21 million to stockholders via dividends and share repurchases. Our balance sheet gives us tremendous flexibility to 
pursue  the  growth  opportunities  ahead  of  us  while  also  continuing  to return  cash  to  stockholders.  We  have  $24  million 
remaining  on  our  most  recent  share-repurchase  authorization,  and  will  continue  to  abide  by  a  disciplined,  opportunistic
approach to buying back our stock. Meanwhile, as we announced in early February, our board of directors has raised our 
quarterly dividend to $0.14 per share beginning with the first quarter of 2017 (from $0.13 per share throughout 2016). 

aa

In  conclusion,  2016  was  an  outstanding  year  for  Power  Integrations,  and  we  enter  2017  with  momentum  fueled  by
innovative products, dynamic secular trends across all of our key end markets, and the continuing global push for greater 
energy efficiency and cleaner forms of energy. I look forward to reporting on our progress in the year ahead.

Sincerely,

Balu Balakrishnan
President and Chief Executive Officer 
March 2017 

The  statements  in  this  Annual  Report  relating  to  future  events  or  results  are  forward-looking  statements  that  involve  many  risks  and 
uncertainties. In some cases, forward-looking statements are indicated by the use of words such as “would,” “could,” “will,” “may,”
  “plan,”  “estimate,”  “potential,”  “seek,”
i
“expect,”  “believe,”  “look  forward,”  “anticipate,”  “outlook,”  “if,”  “future,”  “intend,”
“scheduled,” “continue” and similar words and phrases, including the negatives of these terms, or other variations of these terms. Our 
actual results could differ materially from those contained in these forward-looking statements due to a number  of factors, including:
changes in global macroeconomic conditions; potential changes and shifts in customer demand away from end products that utilize our 
products; the effects of competition; the outcome and cost of patent litigation; unforeseen costs and expenses; unfavorable fluctuations in 
component costs resulting from changes in commodity prices and/or the exchange rate between the U.S. dollar and the Japanese yen;
and  the  challenges  inherent  in  integrating  and  forecasting  the  performance  of  acquired  businesses.  In  addition,  new  product 
introductions and design wins are subject to the risks and uncertainties that typically accompany development and delivery of complex
technologies to the marketplace, including product development delays and defects and market acceptance of the new products. These 
and other risk factors that may cause actual results to differ are discussed in Part I, Item 1A — “Risk Factors” included in the Form 10-
K which is part of this Annual Report.

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION 
Washington, DC 20549 
FORM 10-K 

(Mark One) 

Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the fiscal year ended 

December 31, 2016
or 

Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition 

period from                 to                

Commission File Number 0-23441
POWER INTEGRATIONS, INC.
(Exact name of registrant as specified in its charter) 

DELAWARE
(State or other jurisdiction of
Incorporation or organization)

5245 Hellyer Avenue, San Jose, California
 (Address of principal executive offices)

94-3065014
(I.R.S. Employer
Identification No.)

95138-1002
(Zip code)

(408) 414-9200
(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class

Common Stock, $0.001 Par Value

Name of Each Exchange on Which Registered

The NASDAQ Global Select Market

Securities registered pursuant to Section 12(g) of the Act:  None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. YES  

    NO 

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.     YES  

    NO 

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 
1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to 
such filing requirements for the past 90 days.   YES  

    NO 

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File 
required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the 
registrant was required to submit and post such files). YES  

    NO 

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, 
to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any 
amendment to this Form 10-K. 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. 
See  the  definitions  of  “large  accelerated  filer”,  “accelerated  filer”  and  “smaller  reporting  company”  in  Rule  12b-2  of  the  Exchange  Act: 

Large accelerated filer  

Accelerated filer  

Non-accelerated filer    
(Do not check if a smaller reporting company)

Smaller reporting company  

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).  YES 

NO 

The aggregate market value of registrant’s voting and non-voting common stock held by non-affiliates of registrant on June 30, 2016, the last 
business day of the registrant’s most recently completed second fiscal quarter, was approximately $1.2 billion, based upon the closing sale price 
of the common stock as reported on The NASDAQ Global Select Market. Shares of common stock held by each officer and director have been 
excluded in that such persons may be deemed to be affiliates. This determination of affiliate status is not a conclusive determination for other 
purposes.

Outstanding shares of registrant’s common stock, $0.001 par value, as of January 31, 2017: 29,415,049. 

DOCUMENTS INCORPORATED BY REFERENCE
The information required by Part III of this report, to the extent not set forth herein, is incorporated by reference from the Registrant’s definitive 
proxy statement relating to the 2017 annual meeting of stockholders, which definitive proxy statement will be filed with the Securities and Exchange 
Commission within 120 days after the fiscal year to which this Report relates.

 
POWER INTEGRATIONS, INC.

TABLE OF CONTENTS

PART I. 

Page

ITEM 1.

BUSINESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4

ITEM 1A. RISK FACTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14

ITEM 1B. UNRESOLVED STAFF COMMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

ITEM 2.

PROPERTIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

ITEM 3.

LEGAL PROCEEDINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22

ITEM 4. MINE SAFETY DISCLOSURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PART II.

22

ITEM 5.

MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER 
MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES. . . . . . . . . . . . . . . . .

23

ITEM 6.

SELECTED FINANCIAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

25

ITEM 7.

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION 
AND RESULTS OF OPERATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

26

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK. . . . .

37

ITEM 8.

FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA . . . . . . . . . . . . . . . . . . . . .

38

ITEM 9.

CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING 
AND FINANCIAL DISCLOSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

38

ITEM 9A. CONTROLS AND PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

38

ITEM 9B. OTHER INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

41

PART III.

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE . . . . . . . .

45

ITEM 11. EXECUTIVE COMPENSATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

45

ITEM 12.

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND 
MANAGEMENT AND RELATED STOCKHOLDER MATTERS . . . . . . . . . . . . . . . . . . .

ITEM 13.

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR 
INDEPENDENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

45

46

ITEM 14.

PRINCIPAL ACCOUNTING FEES AND SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

46

PART IV.

ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES . . . . . . . . . . . . . . . . . . . . . . . . . . . .

47

ITEM 16.

FORM 10-K SUMMARY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

88

SIGNATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

89

2

 
 
 
Cautionary Note Regarding Forward-Looking Statements

This Annual Report on Form 10-K, including information incorporated by reference herein, includes a 
number of forward-looking statements that involve many risks and uncertainties.  In some cases, forward-looking 
statements  are  indicated  by  the  use  of  words  such  as  “would,”  “could,”  “will,”  “may,”  “expect,”  “believe,” 
“anticipate,” “if,” “future,” “intend,” “plan,” “estimate,” “potential,” “seek” or “continue” and similar words and 
phrases, including the negatives of these terms, or other variations of these terms.  These statements reflect our 
current views with respect to future events and our potential financial performance and are subject to risks and 
uncertainties that could cause our actual results and financial position to differ materially and/or adversely from 
what is projected or implied in any forward-looking statements included in this Form 10-K.  These factors include, 
but are not limited to: we do not have long-term contracts with any of our customers and if they fail to place, or if 
they  cancel  or  reschedule  orders  for  our  products,  our  operating  results  and  our  business  may  suffer;  intense 
competition in the high-voltage power supply industry may lead to a decrease in our average selling price and 
reduced sales volume of our products; if demand for our products declines in our major end markets, our net 
revenues will decrease; we depend on third-party suppliers to provide us with wafers for our products, and if they 
fail to provide us sufficient quantities of wafers, our business may suffer; if we are unable to adequately protect 
or enforce our intellectual property rights, we could lose market share, incur costly litigation expenses, suffer 
incremental price erosion or lose valuable assets, any of which could harm our operations and negatively impact 
our profitability; fluctuations in exchange rates, particularly the exchange rate between the U.S. dollar and the 
Japanese yen, Swiss franc and euro, may impact our gross margin or net income; audits of our tax returns and 
potential future changes in tax laws may increase the amount of taxes we are required to pay; we are engaged in 
intellectual property litigation, and if we do not prevail in our litigation, we will have expended significant financial 
resources, potentially without any benefit, and may also suffer the loss of rights to use some technologies; and the 
other risks factors described in Item 1A of Part I -- “Risk Factors” of this Form 10-K. We make these forward 
looking statements based upon information available on the date of this Form 10-K, and we have no obligation 
(and expressly disclaim any obligation) to update or alter any forward-looking statements, whether as a result of 
new information or otherwise.  In evaluating these statements, you should specifically consider the risks described 
under Item 1A of Part I -- “Risk Factors,” Item 7 of Part II -“Management’s Discussion and Analysis of Financial 
Condition and Results of Operations” and elsewhere in this Annual Report on Form 10-K.

3

 
PART I. 

Item 1. Business.

Overview 

We design, develop and market analog and mixed-signal integrated circuits (ICs) and other electronic 
components and circuitry used in high-voltage power conversion. Our products are used in power converters that 
convert electricity from a high-voltage source (typically 48 volts or higher) to the type of power required for a 
specified downstream use. In most cases, this conversion entails, among other functions, converting alternating 
current (AC) to direct current (DC) or vice versa, reducing or increasing the voltage, and regulating the output 
voltage and/or current according to the customer’s specifications.

A large percentage of our products are ICs used in AC-DC power supplies, which convert the high-voltage 
AC from a wall outlet to the low-voltage DC required by most electronic devices. Power supplies incorporating 
our products are used with all manner of electronic products including mobile phones, computing and networking 
equipment, appliances, electronic utility meters, industrial controls, and lights that utilize light-emitting diodes 
(LEDs), and “smart-home,” or “internet of things” applications such as networked thermostats, power strips and 
other home-automation and security devices.

We also offer high-voltage gate drivers - either standalone ICs or circuit boards containing ICs, electrical 
isolation components and other circuitry - used to operate high-voltage switches such as insulated-gate bipolar 
transistors (IGBTs). These combinations of switches and drivers are used for power conversion in high-power 
applications (i.e., power levels ranging from a few kilowatts up to one gigawatt) such as industrial motors, solar- 
and wind-power systems, electric vehicles and high-voltage DC transmission systems.

Our products bring a number of important benefits to the power-conversion market compared with less 
advanced alternatives, including reduced component count and design complexity, smaller size, higher reliability 
and reduced time-to-market. Our products also improve the energy efficiency of power converters, helping our 
customers meet the increasingly stringent efficiency standards that have been adopted around the world for many 
electronic products, and improving the efficacy of renewable-energy systems, electric vehicles and other high-
power applications.

 While  the  size  of  our  addressable  market  fluctuates  with  changes  in  macroeconomic  conditions,  the 
market has generally exhibited a modest growth rate over time as growth in the unit volume of power converters 
has largely been offset by reductions in the average selling price of components in this market. Therefore, the 
growth of our business depends largely on our penetration of the addressable market, and our success in expanding 
the addressable market by introducing new products that expand the range of applications we can address and/or 
increase the value of the components we can sell into a power converter. Our growth strategy includes the following 
elements:

• 
Increase the penetration of our ICs in the “low-power” market. The largest proportion of our 
revenues comes from AC-DC power-supply applications requiring 500 watts of output or less. We continue 
to introduce more advanced products for this market that offer higher levels of integration and performance 
compared to earlier products. We also continue to expand our sales and application-engineering staff, as 
well as our offerings of technical documentation and design-support tools to help customers use our ICs. 
These tools include our PI Expert™ design software, which we offer free of charge, and our transformer-
sample service.

• 
Increase the penetration of our products and the size of our market opportunity in “high-power” 
applications. We also bring the benefits of integration to higher-power applications (up to approximately 

4

 
 
  
 
 
one gigawatt). In particular, we sell our gate-driver products into applications such as industrial motor 
drives,  renewable  energy  systems,  DC  transmission  systems  and  electric  vehicles.  We  have  recently 
expanded our addressable market for high-power applications by introducing the SCALE-iDriver product 
family, which enables us to address applications between approximately 10 kilowatts and 100 kilowatts, 
whereas previously our sales of high-power products were primarily for applications above 100 kilowatts.

• 
Capitalize on the growing demand for more energy-efficient electronic products and lighting 
technologies, and for cleaner energy and transportation technologies. We believe that energy-efficiency 
is becoming an increasingly important design criterion for power supplies due largely to the emergence 
of standards and specifications that encourage, and in some cases mandate, the design of more energy-
efficient electronic products. For example, in 2008 the U.S. Department of Energy implemented mandatory 
federal standards governing the efficiency of external power supplies; these standards were tightened in 
2016.  Power  supplies  incorporating  our  ICs  are  generally  able  to  comply  with  all  known  efficiency 
specifications currently in effect, including these tighter U.S. standards.

Additionally, technological advances combined with regulatory and legislative actions are resulting 
in the adoption of alternative lighting technologies such as LEDs. We believe this presents a significant 
opportunity for us because our ICs are used in driver (i.e., power-supply) circuitry for high-voltage LED 
lighting applications. Finally, the growing desire for less carbon-intensive sources of energy and modes 
of transportation represents an opportunity for us since our high-voltage gate drivers are used in renewable-
energy systems as well as electric trains and electric vehicles.

Industry Background 

  Virtually every electronic device that plugs into a wall socket requires a power supply to convert the high-
voltage  alternating  current  provided  by  electric  utilities  into  the  low-voltage  direct  current  required  by  most 
electronic devices.  A power supply may be located inside a device, such as a consumer appliance or desktop 
computer, or it may be outside the device as in the case of a mobile-phone charger or an adapter for a cordless 
phone.

  Until approximately 1970, AC-DC power supplies were generally in the form of line-frequency, or linear, 
transformers. These devices, consisting primarily of copper wire wound around an iron core, tend to be bulky and 
heavy, and typically waste a substantial amount of electricity. In the 1970s, the invention of high-voltage discrete 
semiconductors enabled the development of a new generation of power supplies known as switched-mode power 
supplies, or switchers. These switchers generally came to be a cost-effective alternative to linear transformers in 
applications requiring more than about three watts of power; in recent years the use of linear transformers has 
declined even further as a result of energy-efficiency standards and higher raw-material prices.

Switchers  are  generally  smaller,  lighter-weight  and  more  energy-efficient  than  linear  transformers. 
However, switchers designed with discrete components are highly complex, containing numerous components and 
requiring a high level of analog design expertise. Further, the complexity and high component count of discrete 
switchers make them relatively costly, difficult to manufacture and prone to failures. Also, some discrete switchers 
lack inherent safety and energy-efficiency features; adding these features may further increase the component 
count, cost and complexity of the power supply.

In  high-power  systems  such  as  industrial  motor  drives,  electric  locomotives  and  renewable-energy 
systems, power conversion is typically performed using arrays of high-power silicon transistors known as IGBT 
modules; these modules are operated by electronic circuitry known as gate drivers (or IGBT drivers), whose function 
is to ensure accurate, safe and reliable operation of the IGBT modules. Much like discrete power supplies, discrete 
gate drivers tend to be highly complex, requiring a large number of components and a great deal of design expertise.

5

 
 
 
Our Highly Integrated Approach 

In 1994 we introduced TOPSwitch, the industry’s first cost-effective high-voltage IC for switched-mode 
AC-DC power supplies; we have since introduced a range of other product families such as TinySwitch, LinkSwitch, 
Hiper and InnoSwitch which have expanded the range of power-supply applications we can address. In May 2012 
we expanded our addressable market to include high-voltage gate drivers.

  Our ICs and gate drivers drastically reduce the complexity and component count of power converters 
compared to typical discrete designs by integrating many of the functions otherwise performed by numerous discrete 
electronic  components,  and  by  eliminating  (or  reducing  the  size  and  cost  of)  additional  components  through 
innovative  system  design. As  a  result,  our  products  enable  power  converters  to  have  superior  features  and 
functionality at a total cost equal to or lower than that of many competing alternatives. Our products offer the 
following key benefits:

• 

Fewer Components, Reduced Size and Higher Reliability 

  Our  highly  integrated  ICs  and  gate  drivers  enable  designs  with  up  to  70%  fewer  components  than 
comparable discrete designs. This reduction in component count enhances reliability and efficiency, reduces size, 
accelerates  time-to-market  and  results  in  lower  manufacturing  costs  for  our  customers.  Power  supplies  that 
incorporate our ICs are also lighter and more portable than comparable power supplies built with copper-and-iron 
linear transformers, which are still used in some low-power applications.

• 

Reduced Time-to-Market, Enhanced Manufacturability 

  Because our products eliminate much of the complexity associated with the design of power converters, 
designs can typically be completed in much less time, resulting in more efficient use of our customers' design 
resources and shorter time-to-market for new designs. The lower component count and reduced complexity enabled 
by our products also makes designs more suitable for high-volume manufacturing. We also provide extensive 
hands-on design support as well as online design tools, such as our PI Expert design software, that further reduce 
time-to-market and product development risks.

• 

Energy Efficiency 

  Our patented EcoSmart technology, introduced in 1998, improves the energy efficiency of electronic 
devices  during  normal  operation  as  well  as  standby  and  “no-load”  conditions.  This  technology  enables 
manufacturers to cost-effectively meet the growing demand for energy-efficient products, and to comply with 
increasingly stringent energy-efficiency requirements. Our gate drivers also enable very high efficiency in high-
power systems; in many such systems, such as renewable-energy installations, even small efficiency gains can 
dramatically shorten the payback period over which the cost of a system is recovered through energy savings.

• 

Wide Power Range and Scalability 

Products  in  our  current  IC  families  can  address  AC-DC  power  supplies  with  output  power  up  to 
approximately 500 watts as well as some high-voltage DC-DC applications; our high-voltage gate drivers are used 
in applications with power levels as high as one gigawatt. Within each of our product families, the designer can 
scale up or down in power to address a wide range of designs with minimal design effort.

Energy Efficiency

Power supplies often draw significantly more electricity than the amount needed by the devices they 
power. As a result, billions of dollars' worth of electricity is wasted each year, and millions of tons of greenhouse 
gases are unnecessarily produced by power plants. Energy waste occurs during the normal operation of a device 

6

 
 
 
and in standby mode, when the device is plugged in but idle. For example, computers and printers waste energy 
while in “sleep” mode. TVs that are turned off by remote control consume energy while awaiting a remote-control 
signal to turn them back on. A mobile-phone charger left plugged into a wall outlet continues to draw electricity 
even when not connected to the phone (a condition known as “no-load”). Many common household appliances, 
such as microwave ovens, dishwashers and washing machines, also consume power when not in use. In fact, a 
2015 study by the National Resources Defense Council found that devices that are "always-on" but inactive may 
be causing as much as $19 billion in annual energy waste in the U.S alone.

  Lighting is another major source of energy waste. Less than 5% of the energy consumed by traditional 
incandescent light bulbs is converted to light, while the remainder is wasted as heat. The Alliance to Save Energy 
has estimated that a conversion to efficient lighting technologies such as compact fluorescent bulbs and light-
emitting diodes, or LEDs, could save as much as $18 billion worth of electricity and 158 million tons of carbon 
dioxide emissions per year in the United States alone.

In response to concerns about the environmental impact of carbon emissions, policymakers are taking 
action to promote energy efficiency. For example, the ENERGY STAR® program and the European Union Code 
of  Conduct  encourage  manufacturers  of  electronic  devices  to  comply  with  voluntary  energy-efficiency 
specifications. In 2007 the California Energy Commission (CEC) implemented mandatory efficiency standards 
for external power supplies. The CEC standards were implemented nationwide in the United States in July 2008 
as a result of the Energy Independence and Security Act of 2007, or EISA; these federal standards were tightened 
in 2016. Similar standards for external power supplies took effect in the European Union in 2010 as part of the 
EU’s EcoDesign Directive for Energy-Related Products.

 In 2009 the CEC announced mandatory efficiency standards for televisions, which took effect in 2011, 
and in January 2012 the CEC announced mandatory efficiency standards for battery-charging systems, which took 
effect in 2013. 

In 2010, the EU EcoDesign Directive implemented standards limiting standby power consumption on a 
wide range of electronic products; the limit was reduced by 50 percent beginning in 2013, with many products 
now limited to 500 milliwatts of standby usage. The EISA legislation also required substantial improvements in 
the efficiency of lighting technologies beginning in 2012; as of 2014, traditional 100-, 75-, 60- and 40-watt bulbs 
may no longer be manufactured or sold in the United States. Plans to eliminate conventional incandescent bulbs 
have also been announced or enacted in other geographies such as Canada, Australia and Europe.

  We believe we offer products that enable manufacturers to meet or exceed these regulations, and all other 
such regulations of which we are aware. Our EcoSmart technology, introduced in 1998, dramatically reduces waste 
in both operating and standby modes; we estimate that this technology has saved billions of dollars’ worth of 
standby power worldwide since 1998. In 2010 we introduced our CapZero and SenZero IC families, which eliminate 
additional sources of standby waste in some power supplies; we have also introduced a range of product families 
designed specifically for LED-lighting applications.

Products 

Below is a brief description of our products: 

• 

AC-DC power conversion products 

TOPSwitch, our first commercially successful product family, was introduced in 1994. Since that time 
we have introduced a wide range of products (such as our TinySwitch, LinkSwitch and Hiper families) to increase 
the level of integration and improve upon the functionality of the original TOPSwitch, and to broaden the range 
of power levels we can address. In 2010 we introduced our CapZero and SenZero families, which reduce standby 

7

 
 
 
  
 
 
power consumption in certain applications by eliminating waste caused by so-called bleed resistors and sense 
resistors. We also offer a range of high-performance, high-voltage diodes known as Qspeed diodes.

In 2014 we introduced our InnoSwitch product family, the first-ever power-supply ICs to combine primary, 
secondary  and  feedback  circuits  into  a  single  package. These  ICs  employ  a  proprietary  technology  known  as 
FluxLink to enable precise control without the need for optical components, which tend to add cost and diminish 
the reliability of power supplies.

In  January  2015  we  further  expanded  our  product  portfolio  with  the  acquisition  of  Cambridge 
Semiconductor Ltd., a producer of controller ICs for low-power AC-DC applications. Since 2010 we have also 
introduced products designed specifically for LED-lighting applications, including our LYTSwitch family.

This portfolio of power-conversion products generally addresses power supplies ranging from less than 
one watt of output up to approximately 500 watts of output, a market we refer to as the “low-power” market.  This 
market consists of an extremely broad range of applications including mobile-device chargers, consumer appliances, 
utility meters, LCD monitors, main and standby power supplies for desktop computers and TVs, LED lamps, and 
numerous other consumer and industrial applications.

• 

High-voltage gate drivers

  We offer a range of high-voltage gate-driver products sold primarily under the SCALE and SCALE-2 
product-family names. These products are fully assembled circuit boards incorporating multiple ICs, electrical 
isolation  components  and  other  circuitry.  We  offer  both  ready-to-operate  “plug-and-play”  drivers  designed 
specifically for use with particular IGBT modules, as well as “driver cores,” which provide more basic driver 
functionality that customers can customize to their own specifications after purchase. In May 2016 we introduced 
the SCALE-iDriver family of standalone ICs, which enables us to address applications between approximately 10 
kilowatts and 100 kilowatts, whereas previously our sales of high-power products were primarily for applications 
above 100 kilowatts.

• 

High-voltage DC-DC products

  The DPA-Switch family of products, introduced in June 2002, was the first monolithic high-voltage DC-
DC power conversion IC designed specifically for use in distributed power architectures.  Applications include 
power-over-Ethernet powered devices such as voice-over-IP phones and security cameras, as well as network hubs, 
line cards, servers, digital PBX phones, DC-DC converter modules and industrial controls.

Other Product Information

TOPSwitch,  TinySwitch,  LinkSwitch,  DPA-Switch,  EcoSmart,  Hiper,  Qspeed,  InnoSwitch,  SCALE, 
SCALE-II, SCALE-III, SCALE-iDriver, PeakSwitch, CAPZero, SENZero, ChiPhy, FluxLink, CONCEPT and PI 
Expert are trademarks of Power Integrations, Inc.

End Markets and Applications

  Our net revenues consist primarily of sales of the products described above. When evaluating our net 
revenues, we categorize our sales into the following four major end-market groupings: communications, computer, 
consumer, and industrial. 

8

 
 
 
 
 
The table below provides the approximate mix of our net sales by end market:

End Market
Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Industrial. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,
2015

2014

2016

27%
6%
36%
31%

24%
7%
36%
33%

18%
10%
37%
35%

Our products are used in a vast range of power-conversion applications in the above-listed end-market 

categories. The following chart lists the most prominent applications for our products in each category.

Market Category
Communications . . . . . . . Mobile-phone chargers, routers, cordless phones, broadband modems, voice-over-IP 

Primary Applications

phones, other network and telecom gear

Computer . . . . . . . . . . . . Desktop  PCs,  LCD  monitors,  servers,  LCD  projectors,  adapters  for  notebook 

computers

Consumer . . . . . . . . . . . . Major and small appliances, air conditioners, TV set-top boxes, digital cameras, TVs, 

video-game consoles

Industrial . . . . . . . . . . . . . LED lighting, industrial controls, utility meters, motor controls, uninterruptible power 
supplies, tools, networked thermostats, power strips and other “smart home” devices, 
industrial motor drives, renewable energy systems, electric locomotives, electric buses 
and other electric vehicles, high-voltage DC transmission systems

Sales, Distribution and Marketing 

  We  sell  our  products  to  original  equipment  manufacturers,  or  OEMs,  and  merchant  power-supply 
manufacturers through our direct sales staff and a worldwide network of independent sales representatives and 
distributors. We have sales offices in the United States, Switzerland, United Kingdom, Germany, Italy, India, China, 
Japan, South Korea, the Philippines, Singapore and Taiwan. Direct sales to OEMs and merchant power supply 
manufacturers represented approximately 25% of our net product revenues for each of 2016, 2015 and 2014, while 
sales to and through distributors accounted for approximately 75% for each of these years. Most of our distributors 
are entitled to return privileges based on sales revenue and are protected from price reductions affecting their 
inventories. Our distributors are not subject to minimum purchase requirements, and sales representatives and 
distributors can discontinue marketing our products at any time.

  Our  top  ten  customers,  including  distributors  that  resell  to  OEMs  and  merchant  power  supply 

manufacturers, accounted for 60% of our net revenues in each of 2016 and 2015, and 59% in 2014.

The following customers, both distributors, accounted for 10% or more of total net revenues in 2016, 

2015 and 2014:

Customer
Avnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powertech Distribution Ltd. . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,
2015

2014

2016

18%
11%

21%
10%

19%
*

_______________
* Total customer revenue was less than 10% of net revenues

  No other customers accounted for more than 10% of net revenues in these periods.  

9

 
 
 
Sales to customers in the United States accounted for approximately 4% of our net revenues in 2016 and 
5% in each of 2015 and 2014, and sales to customers outside of the United States accounted for approximately 
96% of our net revenues in 2016 and 95% in each of 2015 and 2014. See Note 6, “Significant Customers and 
International  Sales,”  in  our  Notes  to  Consolidated  Financial  Statements  in  this Annual  Report  on  Form  10-K 
regarding sales to customers located in foreign countries. See our consolidated financial statements in this Annual 
Report on Form 10-K regarding total revenues and profit for the last three fiscal years.

  We are subject to risks stemming from the fact that most of our manufacturing and most of our customers 
are located in foreign jurisdictions. Risks related to our foreign operations are set forth in Item 1A of this Annual 
Report on Form 10-K, and include: potential weaker intellectual property rights under foreign laws, the burden of 
complying with foreign laws and foreign-currency exchange risk. See, in particular, the risk factor “Our international 
sales activities account for a substantial portion of our net revenues, which subjects us to substantial risks” in Item 
1A of this Form 10-K.

Backlog

  Our sales are primarily made pursuant to standard purchase orders. The quantity of products purchased 
by our customers as well as shipment schedules are subject to revisions that reflect changes in both the customers' 
requirements and in manufacturing availability. Historically, our business has been characterized by short-lead-
time orders and quick delivery schedules; for this reason, and because orders in backlog are subject to cancellation 
or postponement, backlog is not necessarily a reliable indicator of future revenues. 

Research and Development 

  Our  research  and  development  efforts  are  focused  on  improving  our  technologies,  introducing  new 
products  to  expand  our  addressable  markets,  reducing  the  costs  of  existing  products,  and  improving  the  cost-
effectiveness and functionality of our customers' power converters. We have assembled teams of highly skilled 
engineers to meet our research and development goals. These engineers have expertise in high-voltage device 
structure and process technology, analog IC design, system architecture and packaging.  

In 2016, 2015 and 2014, we incurred costs of $62.3 million, $57.5 million and $55.0 million, respectively, 
for research and development (R&D). R&D expenses increased in 2016 compared to 2015 primarily due to increased 
stock-based compensation expense related to performance-based stock awards as a result of our 2016 performance. 
The expansion of headcount in support of our product-development efforts also contributed to the increase. R&D 
expenses increased in 2015 compared to 2014, driven primarily by the addition of employees in connection with 
our acquisition of Cambridge Semiconductor Limited (CamSemi) (refer to Note 11, Acquisitions, in our Notes to 
Consolidated Financial Statements in this Annual Report on From 10-K, for details); the increase in headcount 
caused a corresponding increase in salary and other employee-related expenses. 

Intellectual Property and Other Proprietary Rights 

  We use a combination of patents, trademarks, copyrights, trade secrets and confidentiality procedures to 
protect our intellectual-property rights. Through continued innovating we are constantly adding new patents to our 
portfolio. In 2016 we added a total of 60 U.S. and 47 foreign patents. As of December 31, 2016, we held 682 U.S. 
patents and 473 foreign patents. The U.S. patents have expiration dates ranging from 2017 to 2037. We also hold 
trademarks in the U.S. and various other geographies including Taiwan, Korea, Hong Kong, China, Europe and 
Japan. While our propriety intellectual property portfolio as a whole is important to the success of our business, 
we are not materially dependent upon any one patent. From time to time we may not seek to renew expiring patents 
for legacy technology as it is no longer cost-effective.

  We regard as proprietary some equipment, processes, information and knowledge that we have developed 
and used in the design and manufacture of our products. Our trade secrets include a high-volume production process 

10

 
 
that  produces  our  patented  high-voltage  ICs.  We  attempt  to  protect  our  trade  secrets  and  other  proprietary-
information  through  non-disclosure  agreements,  proprietary  information  agreements  with  employees  and 
consultants, and other security measures. 

Long-lived Assets

  Our long-lived assets consist of property and equipment as well as intangible assets. Our intangible assets 
consist of developed and in-process technology, licenses, patents, customer relationships, trade name, domain 
name, in-place leases and goodwill. Our long-lived assets, including property and equipment and intangible assets, 
are located in the United States and in foreign countries. Approximately 40% of our long-lived assets were located 
in the United States in 2016, 2015 and 2014, while approximately 60% were held outside of the United States. A 
significant amount of our foreign long-lived assets were located in Switzerland, which held approximately 18% 
in each of 2016 and 2015, and 31% in 2014, respectively, of our total long-lived assets. See Note 2, Summary of 
Significant Accounting Policies, in our Notes to Consolidated Financial Statements in this Annual Report on Form 
10-K regarding total property and equipment located in foreign countries. 

Manufacturing 

We contract with three foundries for the manufacture of the vast majority of our silicon wafers: (1) ROHM 
Lapis Semiconductor Co., Ltd., or Lapis, (formerly OKI Electric Industry), (2) Seiko Epson Corporation, or Epson, 
(3) X-FAB  Semiconductor Foundries AG, or X-FAB. These contractors manufacture wafers using our proprietary 
high-voltage process technologies at fabrication facilities located in Japan, Germany and the United States.

Our IC products are assembled and packaged by independent subcontractors in China, Malaysia, Thailand 
and the Philippines. Our ICs are tested predominantly at the facilities of our packaging subcontractors in Asia and, 
to a small extent, at our headquarters facility in San Jose, California. Our IGBT-driver boards are assembled by 
an independent subcontractor in Sri Lanka and tested at our facility in Switzerland. 

  Our fabless manufacturing model enables us to focus on our engineering and design strengths, minimize 
capital expenditures and still have access to high-volume manufacturing capacity. We utilize both proprietary and 
standard IC packages for assembly. Some of the materials used in our packages and aspects of assembly are specific 
to our products. We require our assembly manufacturers to use high-voltage molding compounds which are more 
difficult  to  process  than  industry  standard  molding  compounds.  We  work  closely  with  our  contractors  on  a 
continuous basis to maintain and improve our manufacturing processes. 

  Our  proprietary  high-voltage  processes  do  not  require  leading-edge  geometries  for  them  to  be  cost-
effective, and can therefore use our foundries’ older, low-cost facilities for wafer manufacturing. However, because 
of our highly sensitive high-voltage process, we must interact closely with our foundries to achieve satisfactory 
yields. Our wafer supply agreements with Lapis, Epson and X-FAB expire in April 2018, December 2025 and 
December 2020, respectively. Under the terms of the Lapis agreement, Lapis has agreed to reserve a specified 
amount of production capacity and to sell wafers to us at fixed prices, which are subject to periodic review jointly 
by Lapis and us. In addition, Lapis requires us to supply them with a rolling six-month forecast on a monthly basis. 
Our agreement with Lapis provides for the purchase of wafers in U.S. dollars, with mutual sharing of the impact 
of the fluctuations in the exchange rate between the Japanese yen and the U.S. dollar. Under the terms of the Epson 
agreement, Epson has agreed to reserve a specified amount of production capacity and to sell wafers to us at fixed 
prices, which are subject to periodic review jointly by Epson and us. The agreement with Epson also requires us 
to supply rolling six-month forecasts on a monthly basis, to provide for the purchase of wafers in U.S. dollars and 
to share the impact of the exchange rate fluctuation between the Japanese yen and the U.S. dollar. Under the terms 
of the X-FAB agreement, X-FAB has agreed to reserve a specified amount of production capacity and to sell wafers 
to us at fixed prices, which are subject to periodic review jointly by X-FAB and us. The agreement with X-FAB 
also requires us to supply them with rolling six-month forecasts on a monthly basis. Our purchases of wafers from 
X-FAB are denominated in U.S. dollars.

11

 
 
  Although some aspects of our relationships with Lapis, Epson and X-FAB are contractual, some important 
aspects of these relationships are not written in binding contracts and depend on the suppliers' continued cooperation. 
We cannot assure that we will continue to work successfully with Lapis, Epson or X-FAB in the future, that they 
will continue to provide us with sufficient capacity at their foundries to meet our needs, or that any of them will 
not seek an early termination of their wafer supply agreement with us.  Our operating results could suffer in the 
event of a supply disruption with one or more of our foundries if we were unable to quickly qualify alternative 
manufacturing sources for existing or new products or if these sources were unable to produce wafers with acceptable 
manufacturing yields. 

  We typically receive shipments from our foundries approximately four to six weeks after placing orders, 
and lead times for new products can be substantially longer. To provide sufficient time for assembly, testing and 
finishing, we typically need to receive wafers four weeks before the desired ship date to our customers.  As a result 
of these factors and the fact that customers’ orders can be placed with little advance notice, we have only a limited 
ability to react to fluctuations in demand for our products. We try to carry a substantial amount of wafer and 
finished-goods inventory to help offset these risks and to better serve our markets and meet customer demand.

Competition 

  Competing alternatives to our high-voltage ICs for the power-supply market include monolithic and hybrid 
ICs  from  companies  such  as  Fairchild  Semiconductor  (recently  acquired  by  ON  Semiconductor), 
STMicroelectronics, Infineon, ON Semiconductor and Sanken Electric Company, as well as PWM-controller chips 
paired with discrete high-voltage bipolar transistors and MOSFETs; such controller chips are produced by a large 
number of vendors, including those listed above as well as such companies as NXP Semiconductors, Diodes Inc., 
On-Bright  Electronics  and  Dialog  Semiconductor.  Self-oscillating  switchers,  built  with  discrete  components 
supplied by numerous vendors, are also commonly used. For some applications, line-frequency transformers are 
also a competing alternative to designs utilizing our products. Our IGBT-driver products compete with alternatives 
from such companies as Avago, Infineon and Semikron, as well as driver circuits made up of discrete devices.

  Generally, our products enable customers to design power converters with total bill-of-materials (BOM) 
costs similar to those of competing alternatives. As a result, the value of our products is influenced by the prices 
of discrete components, which fluctuate in relation to market demand, raw-material prices and other factors, but 
have generally decreased over time.  

  While we vary the pricing of our ICs in response to fluctuations in prices of alternative solutions, we also 
compete based on a variety of other factors. Most importantly, the highly integrated nature of our products enables 
designs that utilize fewer total components than comparable discrete designs or designs using other integrated or 
hybrid products. This enables power converters to be designed more quickly and manufactured more efficiently 
and reliably than competing designs. We also compete on the basis of product functionality such as safety features 
and energy-efficiency features and on the basis of the technical support we provide to our customers. This support 
includes hands-on design assistance as well as a range of design tools and documentation such as software and 
reference designs. We also believe that our record of product quality and history of delivering products to our 
customers on a timely basis serve as additional competitive advantages.

Warranty

  We generally warrant that our products will substantially conform to the published specifications for 12 
months from the date of shipment. Under the terms of our purchase orders, our liability is limited generally to 
either a credit equal to the purchase price or replacement of the defective part.

12

Employees 

  As of December 31, 2016, we employed 626 full-time personnel, consisting of 86 in manufacturing, 214 
in research and development, 273 in sales, marketing and applications support, and 53 in finance and administration. 

Investor Information 

  We make available, free of charge, copies of our annual report on Form 10-K, quarterly reports on Form 10-
Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 
15(d) of the Exchange Act as soon as reasonably practicable after filing this material electronically or otherwise 
furnishing it to the SEC.  Investors may obtain free electronic copies or request paper copies of these reports via 
the  “For  Investors”  section  of  our  website,  www.power.com.  Our  website  address  is  provided  solely  for 
informational purposes. We do not intend, by this reference, that our website should be deemed to be part of this 
Annual Report. The reports filed with the SEC are also available at www.sec.gov.  

  Our corporate governance guidelines, the charters of our board committees, and our code of business 
conduct and ethics, including ethics provisions that apply to our principal executive officer, principal financial 
officer, controller and senior financial officers, are also available via the investor website listed above. These items 
are also available in print to any stockholder who requests them by calling (408) 414-9200.

Power Integrations, Inc. was incorporated in California on March 25, 1988, and reincorporated in Delaware 

in December 1997.

Executive Officers of the Registrant

  As of January 31, 2017, our executive officers, who are appointed by and serve at the discretion of the 

board of directors, were as follows: 

Name
Balu Balakrishnan
Douglas Bailey
Radu Barsan
David “Mike” Matthews
Sandeep Nayyar
Ben Sutherland
Raja Petrakian
Clifford Walker

Position With Power Integrations
President, Chief Executive Officer and Director . . . . . . . . . . . . . . . .
Vice President, Marketing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vice President, Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vice President, Product Development . . . . . . . . . . . . . . . . . . . . . . . .
Vice President, Finance and Chief Financial Officer . . . . . . . . . . . . .
Vice President, Worldwide Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vice President, Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vice President, Corporate Development. . . . . . . . . . . . . . . . . . . . . . .

Age
62
50
64
52
57
45
52
65

  Balu  Balakrishnan  has  served  as  president  and  chief  executive  officer  and  as  a  director  of  Power 
Integrations since January 2002.  He served as president and chief operating officer from April 2001 to January 
2002.  From January 2000 to April 2001, he was vice president of engineering and strategic marketing.  From 
September 1997 to January 2000, he was vice president of engineering and new business development.  From 
September 1994 to September 1997, Mr. Balakrishnan served as vice president of engineering and marketing. Prior 
to joining Power Integrations in 1989, Mr. Balakrishnan was employed by National Semiconductor Corporation. 

  Douglas Bailey has served as our vice president of marketing since November 2004. From March 2001 
to April 2004, he served as vice president of marketing at ChipX, a structured ASIC company. His earlier experience 
includes serving as business management and marketing consultant for Sapiential Prime, Inc., director of sales 
and business unit manager for 8x8, Inc., and serving in application engineering management for IIT, Inc. and design 
engineering roles with LSI Logic, Inmos, Ltd. and Marconi.

13

 
 
  Radu Barsan has served as our vice president of technology since January 2013, leading our foundry 
engineering, technology development and quality organizations. Prior to joining Power Integrations, Mr. Barsan 
served as chairman and CEO at Redfern Integrated Optics, Inc., a supplier of single frequency narrow linewidth 
lasers, modules, and subsystems, from 2001 to 2013, where he was responsible for overseeing the operations of 
Redfern Integrated Optics. Previously, he served in a succession of engineering-management and technology-
development roles at Phaethon Communications, Inc., a photonics technology company, Cirrus Logic, Inc., a high-
precision  analog  and  digital  signal  processing  company, Advanced  Micro  Devices,  a  semiconductor  design 
company, Cypress Semiconductor, Inc., a semiconductor company and Microelectronica a distributor of electronic 
components. Mr. Barsan has more than 30 years of commercial experience in semiconductor and optical components 
development, engineering and operations. 

  Mike Matthews has served as our vice president of product development since August 2012. Mr. Matthews 
joined Power Integrations in 1992, managing our European application-engineering group and then our European 
sales organization as managing director of  Power Integrations (Europe). He has led our product-definition team 
since 2000, serving as director of strategic marketing prior to assuming his current role. Prior to joining Power 
Integrations, Mr. Matthews worked at several electric motor-drive companies and then at Siliconix, a semiconductor 
company, as a motor-control applications specialist.

Sandeep Nayyar has served as our vice president and chief financial officer since June 2010.  Previously 
Mr. Nayyar served as vice president of finance at Applied Biosystems, Inc., a developer and manufacturer of life-
sciences  products,  from  2002  to  2009.  Mr.  Nayyar  was  a  member  of  the  executive  team  with  world-wide 
responsibilities for finance. From 1990 to 2001, Mr. Nayyar served in a succession of financial roles including 
vice president of finance at Quantum Corporation, a computer storage company.  Mr. Nayyar also worked for five 
years in the public-accounting field at Ernst & Young LLP.  Mr. Nayyar is a Certified Public Accountant, Chartered 
Accountant and has a Bachelor of Commerce from the University of Delhi, India.    

  Ben Sutherland has served as our vice president, worldwide sales since July 2011. Mr. Sutherland joined 
our company in May 2000 as a member of our sales organization in Europe. From May 2000 to July 2011, Mr. 
Sutherland served in various sales positions responsible primarily for our international sales, and more recently 
for domestic sales. From 1997 to 2000, Mr. Sutherland served in various product marketing and sales roles at 
Vishay  Intertechnology,  Inc.,  a  manufacturer  and  supplier  of  discrete  semiconductors  and  passive  electronic 
components.  

  Raja  Petrakian  has  served  as  vice  president  of  operations  since  May  2015.  From  1995  to  2015,  Dr. 
Petrakian served in a succession of roles in operations and supply chain management, most recently as senior vice 
president  of  worldwide  operations,  at  Xilinx  Inc.  where   he  was  responsible  for  manufacturing,  supply  chain 
management (fabrication through delivery), customer service, supplier relationships, purchasing, import/export 
compliance, new product introduction operations, and logistics. Prior to joining Xilinx he was a research staff 
member at the IBM T.J. Watson Research Center.

  Clifford Walker has served as our vice president, corporate development since June 1995.  From September 
1994 to June 1995, Mr. Walker served as vice president of Reach Software Corporation, a software company.  From 
December 1993 to September 1994, Mr. Walker served as president of Morgan Walker International, a consulting 
company.

Item 1A. Risk Factors.

In addition to the other information in this report, the following factors should be considered carefully 

in evaluating our business before purchasing shares of our stock. 

Our operating results are volatile and difficult to predict. If we fail to meet the expectations of public 
market analysts or investors, the market price of our common stock may decrease significantly. Our net revenues 

14

 
 
 
and operating results have varied significantly in the past, are difficult to forecast, are subject to numerous factors 
both within and outside of our control, and may fluctuate significantly in the future. As a result, our operating 
results could fall below the expectations of public market analysts or investors. If that occurs, the price of our stock 
may decline.

Some of the factors that could affect our operating results include the following:

the  demand  for  our  products  declining  in  the  major  end  markets  we  serve,  which  may  occur  due  to 
competitive factors, supply-chain fluctuations or changes in macroeconomic conditions;

our products are sold through distributors, which limits our direct interaction with our end customers, 
which reduces our ability to forecast sales and increases the complexity of our business;

the  volume  and  timing  of  delivery  of  orders  placed  by  us  with  our  wafer  foundries  and  assembly 
subcontractors, and their ability to procure materials; 

competitive pressures on selling prices; 

the ability of our products to penetrate additional markets;

the volume and timing of orders received from customers; 

the inability to adequately protect or enforce our intellectual property rights;

reliance on international sales activities for a substantial portion of our net revenues; 

fluctuations in exchange rates, particularly the exchange rate between the U.S. dollar and the Japanese 
yen, the Euro and the Swiss franc;

expenses  we  are  required  to  incur  (or  choose  to  incur)  in  connection  with  our  intellectual  property 
litigations;

our ability to develop and bring to market new products and technologies on a timely basis;

earthquakes, terrorists acts or other disasters;

continued impact of changes in securities laws and regulations, including potential risks resulting from 
our evaluation of our internal controls over financial reporting;

the lengthy timing of our sales cycle;

undetected defects and failures in meeting the exact specifications required by our products; 

audits by the Internal Revenue Service, and potential future changes in tax laws may increase the amount 
of taxes we are required to pay;

our ability to attract and retain qualified personnel;

risks associated with acquisitions and strategic investments;

our ability to successfully integrate, or realize the expected benefits from, our acquisitions;

changes in environmental laws and regulations, including with respect to energy consumption and climate 
change;

interruptions in our information technology systems; and

uncertainties arising out of economic consequences of current and potential military actions or terrorist 
activities and associated political instability.

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

If demand for our products declines in our major end markets, our net revenues will decrease. A limited 
number  of  applications  of  our  products,  such  as  cellphone  chargers,  LED  lights,  desktop  PCs  and  consumer 

15

 
 
appliances make up a significant percentage of our net revenues. We expect that a significant level of our net 
revenues and operating results will continue to be dependent upon these applications in the near term. The demand 
for these products has been highly cyclical and has been impacted by economic downturns in the past. Any economic 
slowdown in the end markets that we serve could cause a slowdown in demand for our ICs. When our customers 
are not successful in maintaining high levels of demand for their products, their demand for our ICs decreases, 
which adversely affects our operating results. Any significant downturn in demand in these markets would cause 
our net revenues to decline and could cause the price of our stock to fall.

Our products are sold through distributors, which limits our direct interaction with our end customers, 
therefore reducing our ability to forecast sales and increasing the complexity of our business. Sales to distributors 
accounted for approximately 75% of net revenues in each of the years ended December 31, 2016, 2015 and 2014. 
Selling through distributors reduces our ability to forecast sales and increases the complexity of our business, 
requiring us to: 

•  manage a more complex supply chain;

•  monitor the level of inventory of our products at each distributor, and

•  monitor the financial condition and credit-worthiness of our distributors, many of which are located outside 

of the United States and not publicly traded.

Since we have limited ability to forecast inventory levels at our end customers, it is possible that there 
may  be  significant  build-up  of  inventories  in  the  distributor  channel,  with  the  OEM  or  the  OEM’s  contract 
manufacturer. Such a buildup could result in a slowdown in orders, requests for returns from customers, or requests 
to move out planned shipments. This could adversely impact our revenues and profits. Any failure to manage these 
complexities could disrupt or reduce sales of our products and unfavorably impact our financial results.

We depend on third-party suppliers to provide us with wafers for our products and if they fail to provide 
us sufficient quantities of wafers, our business may suffer. Our primary supply arrangements for the production of 
wafers are with Epson, Lapis, and X-FAB. Our contracts with these suppliers expire on varying dates, with the 
earliest to expire in April 2018. Although some aspects of our relationships with Lapis, X-FAB and Epson are 
contractual, many important aspects of these relationships depend on their continued cooperation. We cannot assure 
that we will continue to work successfully with Epson, Lapis and X-FAB in the future, and that the wafer foundries’ 
capacity will meet our needs. Additionally, one or more of these wafer foundries could seek an early termination 
of our wafer supply agreements. Any serious disruption in the supply of wafers from Epson, Lapis and X-FAB 
could harm our business. We estimate that it would take 12 to 24 months from the time we identified an alternate 
manufacturing source to produce wafers with acceptable manufacturing yields in sufficient quantities to meet our 
needs.

Although we provide our foundries with rolling forecasts of our production requirements, their ability to 
provide wafers to us is ultimately limited by the available capacity of the wafer foundry. Any reduction in wafer 
foundry capacity available to us could require us to pay amounts in excess of contracted or anticipated amounts 
for wafer deliveries or require us to make other concessions to meet our customers’ requirements, or may limit our 
ability to meet demand for our products. Further, to the extent demand for our products exceeds wafer foundry 
capacity, this could inhibit us from expanding our business and harm relationships with our customers.  Any of 
these concessions or limitations could harm our business.

If our third-party suppliers and independent subcontractors do not produce our wafers and assemble our 
finished products at acceptable yields, our net revenues may decline. We depend on independent foundries to 
produce wafers, and independent subcontractors to assemble and test finished products, at acceptable yields and 
to deliver them to us in a timely manner. The failure of the foundries to supply us wafers at acceptable yields could 
prevent us from selling our products to our customers and would likely cause a decline in our net revenues and 
gross margin. In addition, our IC assembly process requires our manufacturers to use a high-voltage molding 

16

 
 
 
 
 
compound that has been available from only a few suppliers. These compounds and their specified processing 
conditions  require  a  more  exacting  level  of  process  control  than  normally  required  for  standard  IC  packages. 
Unavailability of assembly materials or problems with the assembly process can materially and adversely affect 
yields, timely delivery and cost to manufacture. We may not be able to maintain acceptable yields in the future.

In addition, if prices for commodities used in our products increase significantly, raw material costs would 
increase for our suppliers which could result in an increase in the prices our suppliers charge us. To the extent we 
are not able to pass these costs on to our customers; this would have an adverse effect on our gross margins.

Intense competition in the high-voltage power supply industry may lead to a decrease in our average 
selling  price  and  reduced  sales  volume  of  our  products. The  high-voltage  power  supply  industry  is  intensely 
competitive  and  characterized  by  significant  price  sensitivity.  Our  products  face  competition  from  alternative 
technologies,  such  as  linear  transformers,  discrete  switcher  power  supplies,  and  other  integrated  and  hybrid 
solutions. If the price of competing solutions decreases significantly, the cost effectiveness of our products will be 
adversely affected. If power requirements for applications in which our products are currently utilized go outside 
the cost-effective range of our products, some of these alternative technologies can be used more cost effectively. 
In addition, as our patents expire, our competitors could legally begin using the technology covered by the expired 
patents in their products, potentially increasing the performance of their products and/or decreasing the cost of 
their products, which may enable our competitors to compete more effectively. Our current patents may or may 
not inhibit our competitors from getting any benefit from an expired patent.  Our U.S. patents have expiration dates 
ranging from 2017 to 2037. We cannot assure that our products will continue to compete favorably or that we will 
be successful in the face of increasing competition from new products and enhancements introduced by existing 
competitors or new companies entering this market. We believe our failure to compete successfully in the high-
voltage power supply business, including our ability to introduce new products with higher average selling prices, 
would materially harm our operating results.

If our products do not penetrate additional markets, our business will not grow as we expect. We believe 
that our future success depends in part upon our ability to penetrate additional markets for our products. We cannot 
assure that we will be able to overcome the marketing or technological challenges necessary to penetrate additional 
markets. To the extent that a competitor penetrates additional markets before we do, or takes market share from 
us in our existing markets, our net revenues and financial condition could be materially adversely affected.

We do not have long-term contracts with any of our customers and if they fail to place, or if they cancel 
or  reschedule  orders  for  our  products,  our  operating  results  and  our  business  may  suffer.  Our  business  is 
characterized by short-term customer orders and shipment schedules, and the ordering patterns of some of our 
large customers have been unpredictable in the past and will likely remain unpredictable in the future. Not only 
does the volume of units ordered by particular customers vary substantially from period to period, but also purchase 
orders received from particular customers often vary substantially from early oral estimates provided by those 
customers for planning purposes. In addition, customer orders can be canceled or rescheduled without significant 
penalty to the customer. In the past, we have experienced customer cancellations of substantial orders for reasons 
beyond our control, and significant cancellations could occur again at any time. Also, a relatively small number 
of distributors, OEMs and merchant power supply manufacturers account for a significant portion of our revenues. 
Specifically, our top ten customers, including distributors, accounted for 60% of our net revenues in each of the 
years ended December 31, 2016 and 2015. However, a significant portion of these revenues are attributable to 
sales of our products through distributors of electronic components. These distributors sell our products to a broad, 
diverse range of end users, including OEMs and merchant power supply manufacturers, which mitigates the risk 
of customer concentration to a large degree.

If we are unable to adequately protect or enforce our intellectual property rights, we could lose market 
share, incur costly litigation expenses, suffer incremental price erosion or lose valuable assets, any of which could 
harm our operations and negatively impact our profitability. Our success depends upon our ability to continue our 
technological  innovation  and  protect  our  intellectual  property,  including  patents,  trade  secrets,  copyrights  and 

17

 
 
 
 
 
 
 
know-how. We are currently engaged in litigation to enforce our intellectual property rights, and associated expenses 
have been, and are expected to remain, material and have adversely affected our operating results. We cannot assure 
that the steps we have taken to protect our intellectual property will be adequate to prevent misappropriation, or 
that others will not develop competitive technologies or products. From time to time, we have received, and we 
may receive in the future, communications alleging possible infringement of patents or other intellectual property 
rights of others. Costly litigation may be necessary to enforce our intellectual property rights or to defend us against 
claimed infringement. The failure to obtain necessary licenses and other rights, and/or litigation arising out of 
infringement claims could cause us to lose market share and harm our business.

As our patents expire, we will lose intellectual property protection previously afforded by those patents.  
Additionally, the laws of some foreign countries in which our technology is or may in the future be licensed may 
not protect our intellectual property rights to the same extent as the laws of the United States, thus limiting the 
protections applicable to our technology.

Our international sales activities account for a substantial portion of our net revenues, which subjects 
us to substantial risks. Sales to customers outside of the United States of America account for, and have accounted 
for a large portion of our net revenues, including approximately 96% and 95% of our net revenues for the years 
ended December 31, 2016, and 2015, respectively. If our international sales declined and we were unable to increase 
domestic sales, our revenues would decline and our operating results would be harmed.  International sales involve 
a number of risks to us, including: 

• 

• 

• 

• 

• 

• 

potential insolvency of international distributors and representatives; 

reduced protection for intellectual property rights in some countries; 

the impact of recessionary environments in economies outside the United States; 

tariffs and other trade barriers and restrictions; 

the burdens of complying with a variety of foreign and applicable U.S. Federal and state laws; and 

foreign-currency exchange risk.

Our  failure  to  adequately  address  these  risks  could  reduce  our  international  sales  and  materially  and 
adversely affect our operating results. Furthermore, because substantially all of our foreign sales are denominated 
in U.S. dollars, increases in the value of the dollar cause the price of our products in foreign markets to rise, making 
our products more expensive relative to competing products priced in local currencies.

Fluctuations in exchange rates, particularly the exchange rate between the U.S. dollar and the Japanese 
yen, Swiss franc and euro, may impact our gross margin and net income. Our exchange rate risk related to the 
Japanese yen includes two of our major suppliers, Epson and Lapis, with which we have wafer supply agreements 
based in U.S. dollars; however, these agreements also allow for mutual sharing of the impact of the exchange rate 
fluctuation between Japanese yen and the U.S. dollar. Each year, our management and these suppliers review and 
negotiate pricing; the negotiated pricing is denominated in U.S. dollars but is subject to contractual exchange rate 
provisions. The fluctuation in the exchange rate is shared equally between Power Integrations and each of these 
suppliers. We maintain cash denominated in Swiss francs and euros to fund the operations of our Swiss subsidiary. 
The functional currency of our Swiss subsidiary is the U.S. dollar; gains and losses arising from the re-measurement 
of non-functional currency balances are recorded in other income in our consolidated statements of income, and 
material unfavorable exchange-rate fluctuations with the Swiss franc could negatively impact our net income.

If we do not prevail in our litigation, we will have expended significant financial resources, potentially 
without any benefit, and may also suffer the loss of rights to use some technologies.  We are currently involved in 
a number of patent litigation matters and the outcome of the litigation is uncertain.  See Note 10, Legal Proceedings 
and Contingencies, in our Notes to Consolidated Financial Statements included in this Annual Report on Form 
10-K. For example, in one of our patent suits the infringing company has been found to infringe four of our patents. 

18

 
 
 
 
 
Despite the favorable court finding, the infringing party filed an appeal to the damages awarded. In another matter, 
we are being sued in an ongoing case for patent infringement. Should we ultimately be determined to be infringing 
another party’s patents, or if an injunction is issued against us while litigation is pending on those claims, such 
result  could  have  an  adverse  impact  on  our  ability  to  sell  products  found  to  be  infringing,  either  directly  or 
indirectly. In the event of an adverse outcome, we may be required to pay substantial damages, stop our manufacture, 
use, sale, or importation of infringing products, or obtain licenses to the intellectual property we are found to have 
infringed. We have also incurred, and expect to continue to incur, significant legal costs in conducting these lawsuits, 
including the appeal of the case we won, and our involvement in this litigation and any future intellectual property 
litigation could adversely affect sales and divert the efforts and attention of our technical and management personnel, 
whether or not such litigation is resolved in our favor.  Thus, even if we are successful in these lawsuits, the benefits 
of this success may fail to outweigh the significant legal costs we will have incurred.

If our efforts to enhance existing products and introduce new products are not successful, we may not be 
able to generate demand for our products. Our success depends in significant part upon our ability to develop new 
ICs for high-voltage power conversion for existing and new markets, to introduce these products in a timely manner 
and to have these products selected for design into products of leading manufacturers. New product introduction 
schedules are subject to the risks and uncertainties that typically accompany development and delivery of complex 
technologies to the market place, including product development delays and defects. If we fail to develop and sell 
new products in a timely manner then our net revenues could decline.

In addition, we cannot be sure that we will be able to adjust to changing market demands as quickly and 
cost-effectively  as  necessary  to  compete  successfully.  Furthermore,  we  cannot  assure  that  we  will  be  able  to 
introduce new products in a timely and cost-effective manner or in sufficient quantities to meet customer demand 
or that these products will achieve market acceptance. Our failure, or our customers’ failure, to develop and introduce 
new products successfully and in a timely manner would harm our business. In addition, customers may defer or 
return orders for existing products in response to the introduction of new products. When a potential liability exists 
we will maintain reserves for customer returns, however we cannot assure that these reserves will be adequate.

In the event of an earthquake, terrorist act or other disaster, our operations may be interrupted and our 
business would be harmed. Our principal executive offices and operating facilities are situated near San Francisco, 
California, and most of our major suppliers, which are wafer foundries and assembly houses, are located in areas 
that have been subject to severe earthquakes, such as Japan.  Many of our suppliers are also susceptible to other 
disasters such as tropical storms, typhoons or tsunamis. In the event of a disaster, such as the earthquake and 
tsunami in Japan, we or one or more of our major suppliers may be temporarily unable to continue operations and 
may suffer significant property damage. Any interruption in our ability or that of our major suppliers to continue 
operations could delay the development and shipment of our products and have a substantial negative impact on 
our financial results.

Securities laws and regulations, including potential risk resulting from our evaluation of internal controls 
over  financial  reporting,  will  continue  to  impact  our  results.  Complying  with  the  requirements  of  the  federal 
securities  laws  and  NASDAQ’s  conditions  for  continued  listing  have  imposed  significant  legal  and  financial 
compliance costs, and are expected to continue to impose significant costs and management burden on us. These 
rules and regulations also may make it more expensive for us to obtain director and officer liability insurance, and 
we may be required to accept reduced coverage or incur substantially higher costs to obtain coverage. These rules 
and regulations could also make it more difficult for us to attract and retain qualified executive officers and members 
of our board of directors, particularly qualified members to serve on our audit committee. Further, the rules and 
regulations under the Dodd-Frank Wall Street Reform and Consumer Protection Act, which became effective in 
2011, may impose significant costs and management burden on us.

Additionally,  because  these  laws,  regulations  and  standards  are  expected  to  be  subject  to  varying 
interpretations,  their  application  in  practice  may  evolve  over  time  as  new  guidance  becomes  available.  This 

19

 
 
 
 
 
 
evolution may result in continuing uncertainty regarding compliance matters and additional costs necessitated by 
ongoing revisions to our disclosure and governance practices.

Because the sales cycle for our products can be lengthy, we may incur substantial expenses before we 
generate significant revenues, if any. Our products are generally incorporated into a customer’s products at the 
design stage. However, customer decisions to use our products, commonly referred to as design wins, can often 
require us to expend significant research and development and sales and marketing resources without any assurance 
of success. These significant research and development and sales and marketing resources often precede volume 
sales, if any, by a year or more. The value of any design win will largely depend upon the commercial success of 
the customer’s product. We cannot assure that we will continue to achieve design wins or that any design win will 
result in future revenues. If a customer decides at the design stage not to incorporate our products into its product, 
we may not have another opportunity for a design win with respect to that product for many months or years.

Our products must meet exacting specifications, and undetected defects and failures may occur which 
may  cause  customers  to  return  or  stop  buying  our  products.  Our  customers  generally  establish  demanding 
specifications for quality, performance and reliability, and our products must meet these specifications. ICs as 
complex as those we sell often encounter development delays and may contain undetected defects or failures when 
first introduced or after commencement of commercial shipments. We have from time to time in the past experienced 
product  quality,  performance  or  reliability  problems.  If  defects  and  failures  occur  in  our  products,  we  could 
experience lost revenue, increased costs, including warranty expense and costs associated with customer support 
and customer expenses, delays in or cancellations or rescheduling of orders or shipments and product returns or 
discounts, any of which would harm our operating results. 

Audits of our tax returns and potential future changes in tax laws may increase the amount of taxes we 
are required to pay.  Our operations are subject to income and transaction taxes in the United States and in multiple 
foreign jurisdictions and to review or audit by the U.S. Internal Revenue Service (IRS) and state, local and foreign 
tax authorities. In addition, the United States, countries in Asia and other countries where we do business have 
been considering changes in relevant tax, accounting and other laws, regulations and interpretations, including 
changes to tax laws applicable to multinational companies. These potential changes could adversely affect our 
effective tax rates or result in other costs to us. 

We must attract and retain qualified personnel to be successful and competition for qualified personnel 
is intense in our market. Our success depends to a significant extent upon the continued service of our executive 
officers and other key management and technical personnel, and on our ability to continue to attract, retain and 
motivate qualified personnel, such as experienced analog design engineers and systems applications engineers. 
The competition for these employees is intense, particularly in Silicon Valley. The loss of the services of one or 
more of our engineers, executive officers or other key personnel could harm our business. In addition, if one or 
more of these individuals leaves our employ, and we are unable to quickly and efficiently replace those individuals 
with qualified personnel who can smoothly transition into their new roles, our business may suffer. We do not have 
long-term employment contracts with, and we do not have in place key person life insurance policies on, any of 
our employees. 

We are exposed to risks associated with acquisitions and strategic investments. We have made, and in the 
future intend to make, acquisitions of, and investments in, companies, technologies or products in existing, related 
or new markets. Acquisitions involve numerous risks, including but not limited to:

• 

• 

inability to realize anticipated benefits, which may occur due to any of the reasons described below, or 
for other unanticipated reasons;

the risk of litigation or disputes with customers, suppliers, partners or stockholders of an acquisition target 
arising from a proposed or completed transaction; 

20

 
 
 
 
 
• 

• 

impairment  of  acquired  intangible  assets  and  goodwill  as  a  result  of  changing  business  conditions, 
technological  advancements  or  worse-than-expected  performance,  which  would  adversely  affect  our 
financial results; and

unknown, underestimated and/or undisclosed commitments, liabilities or issues not discovered in our due 
diligence of such transactions.

We also in the future may have strategic relationships with other companies, which may decline in value 
and/or not meet desired objectives. The success of these strategic relationships depends on various factors over 
which we may have limited or no control and requires ongoing and effective cooperation with strategic partners.  
Moreover, these relationships are often illiquid, such that it may be difficult or impossible for us to monetize such 
relationships.

Our  inability  to  successfully  integrate,  or  realize  the  expected  benefits  from,  our  acquisitions  could 
adversely affect our results. We have made, and in the future intend to make, acquisitions of other businesses and 
with these acquisitions there is a risk that integration difficulties may cause us not to realize expected benefits.  
The success of the acquisitions could depend, in part, on our ability to realize the anticipated benefits and cost 
savings (if any) from combining the businesses of the acquired companies and our business, which may take longer 
to realize than expected.

Changes in environmental laws and regulations may increase our costs related to obsolete products in 
our existing inventory.  Changing environmental regulations and the timetable to implement them continue to 
impact our customers’ demand for our products. As a result there could be an increase in our inventory obsolescence 
costs for products manufactured prior to our customers’ adoption of new regulations. Currently we have limited 
visibility into our customers’ strategies to implement these changing environmental regulations into their business. 
The  inability  to  accurately  determine  our  customers’  strategies  could  increase  our  inventory  costs  related  to 
obsolescence.

Interruptions in our information technology systems could adversely affect our business.  We rely on the 
efficient and uninterrupted operation of complex information technology systems and networks to operate our 
business. Any significant system or network disruption, including but not limited to new system implementations, 
computer viruses, security breaches, or energy blackouts could have a material adverse impact on our operations, 
sales and operating results. We have implemented measures to manage our risks related to such disruptions, but 
such disruptions could still occur and negatively impact our operations and financial results. In addition, we may 
incur additional costs to remedy any damages caused by these disruptions or security breaches.

Uncertainties arising out of economic consequences of current and potential military actions or terrorist 
activities and associated political instability could adversely affect our business. Like other U.S. companies, our 
business and operating results are subject to uncertainties arising out of economic consequences of current and 
potential military actions or terrorist activities and associated political instability, and the impact of heightened 
security concerns on domestic and international travel and commerce. These uncertainties could also lead to delays 
or cancellations of customer orders, a general decrease in corporate spending or our inability to effectively market 
and sell our products. Any of these results could substantially harm our business and results of operations, causing 
a decrease in our revenues.

Item 1B. Unresolved Staff Comments.

Not applicable.

Item 2. Properties.

We own our principal executive, administrative, manufacturing and technical offices which are located 
in San Jose, California. We also own an R&D facility in New Jersey and a test facility in Biel, Switzerland.  We 

21

 
 
 
 
 
 
 
 
lease administrative office space in Singapore and Switzerland, R&D facilities in Canada and the United Kingdom 
and a design center in Germany, in addition to sales offices in various countries around the world to accommodate 
our  sales  force.   We  believe  that  our  current  facilities  are  sufficient  for  our  Company;  however,  if  headcount 
increases above capacity we may need to lease additional space.

Item 3. Legal Proceedings.

Information with respect to this item may be found in Note 10, Legal Proceedings and Contingencies, in 
our  Notes  to  Consolidated  Financial  Statements  included  later  in  this Annual  Report  on  Form  10-K,  which 
information is incorporated herein by reference.

Item 4. Mine Safety Disclosures.

Not applicable.

22

 
 
PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of 
Equity Securities.

  Our  common  stock  trades  on  the  NASDAQ  Global  Select  Market  under  the  symbol  “POWI”.    The 
following table shows the high and low closing sales prices per share of our common stock as reported on the 
NASDAQ Global Select Market for the periods indicated during which our common stock traded on the NASDAQ 
Global Select Market.    

Year Ended
December 31, 2016

Year Ended
December 31, 2015

High

Low

High

Low

First Quarter. . . . . . . . . . . . . . . . . . . . . . . . $

Second Quarter . . . . . . . . . . . . . . . . . . . . . $

Third Quarter . . . . . . . . . . . . . . . . . . . . . . . $

Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . $

49.75

54.36

63.03

69.55

$

$

$

$

41.63

45.04

48.91

61.97

$

$

$

$

57.52

53.48

44.67

52.74

$

$

$

$

50.00

44.97

36.26

41.00

  As of January 31, 2017, there were approximately 38 stockholders of record. Because brokers and other 
institutions hold many of our shares on behalf of stockholders, we are unable to estimate the total number of 
stockholders represented by these record holders.  

Dividends Declared Per Common Share 

The  following  table  presents  the  quarterly  dividends  declared  on  our  common  stock  for  the  periods 

indicated:

Year Ended
December 31,

2016

2015

First Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Third Quarter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

0.13

0.13

0.13

0.13

$

$

$

$

0.12

0.12

0.12

0.12

We paid a total of $15.1 million and $13.9 million in cash dividends during 2016 and 2015, respectively.

Issuer Purchases of Equity Securities

As of December 31, 2014 we had $23.7 million available to repurchase shares of our common stock under 
previous authorizations by our board of directors. In each of July 2015 and October 2015, our board of directors 
authorized the use of an additional $30.0 million for the repurchase of our common stock, with repurchases to be 
executed according to pre-defined price/volume guidelines. In the year ended December 31, 2016, we purchased 
146,000  shares  for  $6.4  million. As  of  December 31,  2016,  we  had  $23.6  million  available  for  future  stock 
repurchases. Authorization of future repurchase programs is at the discretion of the board of directors and will 
depend on our financial condition, results of operations, capital requirements, business conditions as well as other 
factors. 

We did not repurchase any of our common stock during the fourth quarter of fiscal 2016.

23

 
 
 
Performance Graph (1)

The following graph shows the cumulative total stockholders return of an investment of $100 in cash on 
December 31, 2011 through December 31, 2016 in our common stock, the NASDAQ Composite Index and the
NASDAQ Electronic Components Index and assuming that all dividends were reinvested. The stockholder return 
shown on the graph below is not necessarily indicative of future performance, and we do not make or endorse any
predictions as to future stockholder returns.

Comparison of Cumulative Five Year Total Return

$300

$250

$200

$150

$100

$50

$0

12/31/11

12/31/12

12/31/13

12/31/14

12/31/15

12/31/16

Period Ending

Power Integrations, Inc

NASDAQ Composite

NASDAQ Electronic Components

Company/Index
Power Integrations, Inc. . . . . . . . . .
NASDAQ Composite . . . . . . . . . .
NASDAQ Electronic Components

_______________

12/31/11

12/31/12

12/31/13

12/31/14

12/31/15

12/31/16

100.00
100.00
100.00

101.92
116.41
99.13

170.44
165.47
142.52

159.27
188.69
186.42

151.19
200.32
183.01

212.99
216.54
236.19

(1) This Section is not “soliciting material,” is not deemed “filed” with the SEC and is not to be incorporated 
by reference in any filing of Power Integrations under the Securities Act of 1933, as amended, or the
Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of any 
general incorporation language in any such filing.

24

Item 6.   Selected Financial Data. 

The following selected consolidated financial data should be read in conjunction with ‘’Management’s 
Discussion  and Analysis  of  Financial  Condition  and  Results  of  Operations’’  and  the  consolidated  financial 
statements and the notes thereto included elsewhere in this Annual Report on Form 10-K to fully understand 
factors that may affect the comparability of the information presented below.  The selected consolidated statement 
of income (loss) data for each of the years ended December 31, 2016, 2015 and 2014, and the consolidated balance 
sheet data as of December 31, 2016 and 2015, are derived from our audited consolidated financial statements, 
and accompanying notes, included in this Annual Report on Form 10-K. The selected consolidated statement of 
income (loss) data for each of the years ended December 31, 2013 and 2012, and the consolidated balance sheet 
data as of December 31, 2014, 2013 and 2012, are derived from our audited consolidated financial statements 
which are not included in this report. Our historical results are not necessarily indicative of results for any future 
period.  In  2012,  our  net  loss  was  affected  by  the  impairment  charges  related  our  investment  in  SemiSouth 
Laboratories, and from our settlement with the IRS related to the examination of our tax returns for the years 
2003 through 2006. In 2012, we acquired CT Concept Technologie AG (Concept), a Swiss company. In 2015, 
we acquired Cambridge Semiconductor Limited (CamSemi), a UK company (refer to Note 11, Acquisitions, in 
our Notes to Consolidated Financial Statements in this Annual Report on Form 10-K, for details).

Consolidated Statement of Income (Loss) Data

Year Ended December 31,

(in thousands, except per share amounts)
Net revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income from operations . . . . . . . . . . . . . . . . . . . . . .
Provision for (benefit from) income taxes . . . . . . . .
Net income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . $

2016
387,393
47,844
1,032
47,890

Earnings (loss) per share:

 Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
 Diluted. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

1.66
1.62

Shares used in per share calculation:

 Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 Diluted. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dividend per share . . . . . . . . . . . . . . . . . . . . . . . . . . $

28,925
29,619
0.52

2015
343,989
38,993
271
39,147

1.35
1.32

29,001
29,696
0.48

$

$

$
$

$

2014
348,797
55,796
(2,730)
59,544

1.99
1.93

29,976
30,829
0.44

2013
347,089
54,066
(1,839)
57,266

1.95
1.88

29,421
30,420
0.32

$

$

$
$

$

$

$

$
$

$

$

$

$
$

$

Consolidated Balance Sheet Data
(in thousands)

2016

Year Ended December 31,
2014

2013

2015

2012
305,370
11,352
13,622
(34,404)

(1.20)
(1.20)

28,636
28,636
0.20

2012

Cash and cash equivalents . . . . . . . . . . . . . . . . . . . . $

62,134

$

90,092

$

60,708

$

92,928

$

63,394

Short-term marketable securities . . . . . . . . . . . . . . .

188,323

83,769

114,575

109,179

31,766

Cash, cash equivalents and short-term marketable
securities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Working capital . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Long-term liabilities. . . . . . . . . . . . . . . . . . . . . . . . .

250,457

258,649

555,338

7,380

173,861

188,410

487,537

6,925

175,283

210,752

493,663

7,827

202,107

227,004

501,421

14,317

95,160

124,297

399,130

17,514

Stockholders’ equity. . . . . . . . . . . . . . . . . . . . . . . . . $

488,105

$

428,619

$

430,676

$

436,686

$

341,049

25

Item 7.  Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion and analysis of our financial condition and results of our operations should be 
read in conjunction with the consolidated financial statements and the notes to those statements included elsewhere 
in this Annual Report on Form 10-K.  This discussion contains forward-looking statements that involve risks and 
uncertainties. See “Cautionary Note Regarding Forward-Looking Statements” at the beginning of this Form 10-
K.  Our actual results could differ materially from those contained in these forward-looking statements due to a 
number of factors, including those discussed in Part I, Item 1A “Risk Factors” and elsewhere in this report.

Business Overview

We design, develop and market analog and mixed-signal integrated circuits (ICs) and other electronic 
components and circuitry used in high-voltage power conversion. Our products are used in power converters that 
convert electricity from a high-voltage source (typically 48 volts or higher) to the type of power required for a 
specified downstream use. In most cases, this conversion entails, among other functions, converting alternating 
current (AC) to direct current (DC) or vice versa, reducing or increasing the voltage, and regulating the output 
voltage and/or current according to the customer’s specifications.

  A large percentage of our products are ICs used in AC-DC power supplies, which convert the high-voltage 
AC from a wall outlet to the low-voltage DC required by most electronic devices. Power supplies incorporating 
our products are used with all manner of electronic products including mobile phones, computers, entertainment 
and networking equipment, appliances, electronic utility meters, industrial controls, and lights that utilize light-
emitting diodes (LEDs) rather than incandescent or fluorescent light sources. 

   We also offer high-voltage gate drivers - either standalone ICs or circuit boards containing ICs, electrical 
isolation components and other circuitry - used to operate high-voltage switches such as insulated-gate bipolar 
transistors (IGBTs). These combinations of switches and drivers are used for power conversion in high-power 
applications (i.e., power levels ranging from a few kilowatts up to one gigawatt) such as industrial motors, solar- 
and wind-power systems, electric vehicles and high-voltage DC transmission systems.

  Our  net  revenues  were  $387.4  million,  $344.0  million  and  $348.8  million  in  2016,  2015  and  2014, 
respectively. In 2016 revenues increased by $43.4 million due primarily to higher unit sales into the communications 
end-market, largely as a result of the success of our InnoSwitch products in mobile-device chargers. In addition, 
higher unit sales into the consumer market, particularly the consumer-appliance market, contributed to the increase 
in 2016. The increase was partially offset by lower unit sales into the computer end-market, reflecting reduced 
demand for power supplies for desktop computers. In 2015 revenues decreased by $4.8 million due primarily to 
lower unit sales into the computer end-market, reflecting reduced demand for power supplies for desktop computers, 
and the industrial end-market, reflecting a broad-based slowdown in demand from the industrial sector of the 
economy. These reductions were partially offset by higher unit sales into the communications end-market, largely 
as a result of the success of our InnoSwitch products in mobile-device chargers, and the effect of our acquisition 
of Cambridge Semiconductor Limited (CamSemi), whose products are used primarily in the communications end-
market.

  Our  top  ten  customers,  including  distributors  that  resell  to  OEMs  and  merchant  power  supply 
manufacturers, accounted for 60% of our net revenues in each of 2016 and 2015, and 59% in 2014. Our top two 
customers, both distributors of our products, collectively accounted for approximately 29%, 31% and 28% of our 
net revenues in 2016, 2015 and 2014, respectively. International sales made up approximately 96% of net revenues 
in 2016 and 95% in each of 2015 and 2014.  

Because our industry is intensely price-sensitive, our gross margin (gross profit divided by net revenues) 
is subject to change based on the relative pricing of solutions that compete with ours. Variations in product mix, 
end-market mix and customer mix can also cause our gross margin to fluctuate. Also, because we purchase a large 
percentage of our silicon wafers from foundries located in Japan, our gross margin is influenced by fluctuations 
26

 
 
 
in the exchange rate between the U.S. dollar and the Japanese yen. All else being equal, a 10% change in the value 
of the U.S. dollar compared to the Japanese yen would eventually result in a corresponding change in our gross 
margin of approximately 1.0%; this sensitivity may increase or decrease depending on the percentage of our wafer 
supply that we purchase from Japanese suppliers. Also, although our wafer fabrication and assembly operations 
are outsourced, as are most of our test operations, a portion of our production costs are fixed in nature. As a result, 
our unit costs and gross profit margin are impacted by the volume of units we produce.

Our gross profit, defined as net revenues less cost of revenues, was $191.2 million, or 49% of net revenues, 
in 2016, compared to $173.4 million, or 50% of net revenues in 2015, and $189.6 million, or 54% of net revenues, 
in 2014. The decrease in gross margin in each of 2016 and 2015 was due primarily to a change in end-market mix, 
with a greater percentage of revenues coming from lower-margin end-markets, particularly communications. In 
addition, in 2015 we incurred higher period costs resulting from the amortization of intangibles and inventory 
write-up related to our acquisition of CamSemi, which took place in the first quarter of 2015.

  Total operating expenses in 2016, 2015 and 2014 were $143.3 million, $134.4 million and $133.8 million, 
respectively. The increase in operating expenses in 2016 was due primarily to increased stock-based compensation 
expense related to annual performance-based awards as a result of our financial performance in 2016 and the 
expansion of headcount in support of our product-development efforts. Operating expenses increased in 2015 
primarily due to the addition of employees in connection with our acquisition of CamSemi; the increase in headcount 
caused a corresponding increase in salary and other employee-related expenses. Sales and marketing expenses 
decreased due primarily to a decrease in amortization of intangible assets, as our Concept trade name was fully 
amortized as of the second quarter of 2014, and lower advertising and promotional expenses in 2015.

Critical Accounting Policies and Estimates

The preparation of financial statements and related disclosures in conformity with accounting principles 
generally accepted in the United States of America, or U.S. GAAP, requires management to make estimates and 
assumptions  that  affect  the  reported  amounts  of  assets  and  liabilities  and  disclosures  of  contingent  assets  and 
liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the 
reporting  period.    On  an  ongoing  basis,  we  evaluate  our  estimates,  including  those  listed  below. We  base  our 
estimates on historical facts and various other assumptions that we believe to be reasonable at the time the estimates 
are made.  Actual results could differ from those estimates.

Our critical accounting policies are as follows:  

• 
• 
• 
• 
• 
• 

revenue recognition;
stock-based compensation;
estimating write-downs for excess and obsolete inventory;
income taxes;
business combinations; and
goodwill and intangible assets.

Our critical accounting policies are important to the portrayal of our financial condition and results of 
operations, and require us to make judgments and estimates about matters that are inherently uncertain.  A brief 
description of these critical accounting policies is set forth below. For more information regarding our accounting 
policies, see Note 2, Summary of Significant Accounting Policies, in our Notes to Consolidated Financial Statements 
in this Annual Report on Form 10-K. 

Revenue recognition

  Product revenues consist of sales to original equipment manufacturers, or OEMs, merchant power supply 
manufacturers and distributors. Approximately 75% of our net product sales were made to distributors in 2016. 
We apply the provisions of Accounting Standards Codification (ASC) 605-10, Revenue Recognition, and all related 

27

 
appropriate guidance. Revenue is recognized when all  of  the  following criteria have been met:  (1) persuasive 
evidence  of  an  arrangement  exists,  (2) delivery  has  occurred,  (3) the  price  is  fixed  or  determinable,  and 
(4) collectability is reasonably assured. Customer purchase orders are generally used to determine the existence 
of an arrangement. Delivery is considered to have occurred when title and risk of loss have transferred to our 
customer. We evaluate whether the price is fixed or determinable based on the payment terms associated with the 
transaction and whether the sales price is subject to refund or adjustment. With respect to collectability, we perform 
credit checks for new customers and perform ongoing evaluations of our existing customers’ financial condition 
and require letters of credit whenever deemed necessary. 

Sales to international OEMs and merchant power supply manufacturers for shipments from our facility 
outside of the United States are pursuant to EX Works, or EXW, shipping terms, meaning that title to the product 
transfers to the customer upon shipment from our foreign warehouse. Sales to international OEM customers and 
merchant power supply manufacturers that are shipped from our facility in California are pursuant to Delivered at 
Frontier, or DAF, shipping terms. As such, title to the product passes to the customer when the shipment reaches 
the destination country and revenue is recognized upon the arrival of the product in that country. Shipments to 
OEMs and merchant power supply manufacturers in the Americas are pursuant to Free on Board, or FOB, point 
of origin shipping terms meaning that title is passed to the customer upon shipment. Revenue is recognized upon 
title transfer for sales to OEMs and merchant power supply manufacturers, assuming all other criteria for revenue 
recognition are met. 

Sales to most distributors are made under terms allowing certain price adjustments and rights of return 
on our products held by the distributors. As a result of these rights, we defer the recognition of revenue and the 
costs of revenues derived from sales to these distributors until our distributors report that they have sold our products 
to their customers. Our recognition of such distributor sell-through is based on point of sales reports received from 
the distributor, at which time the price is no longer subject to adjustment and is fixed, and the products are no 
longer subject to return to us except pursuant to warranty terms. The gross profit that is deferred upon shipment 
to the distributor is reflected as “deferred income on sales to distributors” in the accompanying consolidated balance 
sheets. The total deferred revenue as of December 31, 2016 and 2015, was approximately $28.1 million and $25.7 
million, respectively. The total deferred cost as of December 31, 2016 and 2015, was approximately $11.9 million
and $10.6 million, respectively.

Frequently, distributors need to sell at a price lower than the standard distribution price in order to win 
business. At the time the distributor invoices its customer or soon thereafter, the distributor submits a “ship and 
debit” price adjustment claim to us to adjust the distributor’s cost from the standard price to the pre-approved lower 
price. After we verify that the claim was pre-approved, a credit memo is issued to the distributor for the ship and 
debit claim. We maintain a reserve for these unprocessed claims and for estimated future ship and debit price 
adjustments.  The reserves appear as a reduction to accounts receivable and deferred income on sales to distributors 
in our accompanying consolidated balance sheets. To the extent future ship and debit claims significantly exceed 
amounts  estimated,  there  could  be  a  material  impact  on  the  deferred  revenue  and  deferred  margin  ultimately 
recognized.  To evaluate the adequacy of our reserves, we analyze historical ship and debit payments and levels 
of inventory in the distributor channels.

Sales to certain of our distributors are made under terms that do not include rights of return or price 
concessions  after  the  product  is  shipped  to  the  distributor.   Accordingly,  product  revenue  is  recognized  upon 
shipment and title transfer assuming all other revenue recognition criteria are met.

28

 
 
 
 
Stock-based compensation

We apply the provisions of ASC 718-10, Share-Based Payment. Under the provisions of ASC 718-10, 
we recognize the fair value of stock-based compensation in our financial statements over the requisite service 
period of the individual grants, which generally equals a four-year vesting period. We use estimates of volatility, 
expected term, risk-free interest rate, dividend yield and forfeitures in determining the fair value of these awards 
and the amount of compensation expense to recognize. Changes in the estimated forfeiture rate could result in 
changes to our current compensation charges for historical grants.

For awards with performance conditions, we recognize compensation expense when it becomes probable 
that the performance target will be achieved. A probability assessment is performed on a quarterly basis and requires 
significant assumptions and estimates made by management related to the projected achievement of the performance 
targets, which consist of a combination of net revenue, non-GAAP operating earnings and strategic goals. Changes 
in the probability assessment of achieving the performance targets are accounted for in the period of change by 
recording a cumulative catch-up adjustment as if the new estimate had been applied since the service inception 
date. If the actual performance targets achieved differ significantly from those projected by management, additional 
compensation  expense  may  be  recorded  for  the  performance-based  awards  due  to  the  cumulative  catch-up 
adjustment, which could have an adverse impact on our results of operations.

Estimating write-downs for excess and obsolete inventory

When evaluating the adequacy of our valuation adjustments for excess and obsolete inventory, we identify 
excess and obsolete products and also analyze historical usage, forecasted production based on demand forecasts, 
current economic trends and historical write-offs. This write-down is reflected as a reduction to inventory in the 
consolidated balance sheets and an increase in cost of revenues.  If actual market conditions are less favorable than 
our assumptions, we may be required to take additional write-downs, which could adversely impact our cost of 
revenues and operating results. 

Income taxes

Income tax expense is an estimate of current income taxes payable or refundable in the current fiscal year 
based on reported income before income taxes. Deferred income taxes reflect the effect of temporary differences 
and carry-forwards that are recognized for financial reporting and income tax purposes. 

We account for income taxes under the provisions of ASC 740, Income Taxes. Under the provisions of 
ASC 740, deferred tax assets and liabilities are recognized based on the differences between the financial statement 
carrying amounts of existing assets and liabilities and their respective tax bases, utilizing the tax rates that are 
expected to apply to taxable income in the years in which those temporary differences are expected to be recovered 
or settled. We recognize valuation allowances to reduce any deferred tax assets to the amount that we estimate will 
more likely than not be realized based on available evidence and management’s judgment. We limit the deferred 
tax assets recognized related to some of our officers’ compensation to amounts that we estimate will be deductible 
in future periods based upon Internal Revenue Code Section 162(m). In the event that we determine, based on 
available evidence and management judgment, that all or part of the net deferred tax assets will not be realized in 
the future, we would record a valuation allowance in the period the determination is made. In addition, the calculation 
of tax liabilities involves significant judgment in estimating the impact of uncertainties in the application of complex 
tax laws. Resolution of these uncertainties in a manner inconsistent with our expectations could have a material 
impact on our results of operations and financial position.   

As of December 31, 2016, we continue to maintain a valuation allowance on our California deferred tax 
assets as we believe that it is not more likely than not that the deferred tax assets will be fully realized. We also 
maintain a valuation allowance with respect to some of our deferred tax assets relating primarily to tax credits in 
Canada and the state of New Jersey as well as Federal capital loss carryforwards.

29

 
 
Business combinations 

The purchase price of an acquisition is allocated to the underlying assets acquired and liabilities assumed 
based upon their estimated fair values at the date of acquisition. To the extent the purchase price exceeds the fair 
value of the net identifiable tangible and intangible assets acquired and liabilities assumed, such excess is allocated 
to goodwill. We determine the estimated fair values after review and consideration of relevant information, including 
discounted  cash  flows,  quoted  market  prices  and  estimates  made  by  management. We  adjust  the  preliminary 
purchase price allocation, as necessary, during the measurement period of up to one year after the acquisition 
closing date as we obtain more information as to facts and circumstances existing at the acquisition date impacting 
asset valuations and liabilities assumed. Acquisition-related costs are recognized separately from the acquisition 
and are expensed as incurred.

Goodwill and intangible assets

In  accordance  with ASC  350-10,  Goodwill  and  Other  Intangible  Assets,  we  evaluate  goodwill  for 
impairment on an annual basis, or as other indicators of impairment emerge. The provisions of ASC 350-10 require 
that we perform a two-step impairment test. In the first step, we compare the implied fair value of our single 
reporting unit to its carrying value, including goodwill. If the fair value of our reporting unit exceeds the carrying 
amount no impairment adjustment is required. If the carrying amount of our reporting unit exceeds the fair value, 
step two will be completed to measure the amount of goodwill impairment loss, if any exists. If the carrying value 
of our single reporting unit’s goodwill exceeds its implied fair value, then we record an impairment loss equal to 
the difference, but not in excess of the carrying amount of the goodwill. Under the amendments of ASC 350-10, 
Accounting Standards Update (ASU) 2011-08, Testing Goodwill for Impairment, we have the option to first assess 
qualitative factors to determine whether the existence of events or circumstances leads to a determination that it 
is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, we elect this option 
and after assessing the totality of events or circumstances, we determine it is not more likely than not that the fair 
value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is unnecessary. 
We have not elected this option to date. We evaluated goodwill for impairment in the fourth quarters of 2016 and 
2015, and concluded that no impairment existed as of December 31, 2016, and December 31, 2015.  

ASC  350-10  also  requires  that  intangible  assets  with  estimable  useful  lives  be  amortized  over  their 
respective estimated useful lives, and reviewed for impairment in accordance with ASC 360-10, Accounting for 
the Impairment or Disposal of Long-Lived Assets. We review long-lived assets, such as acquired intangibles and 
property and equipment, for impairment whenever events or changes in circumstances indicate that the carrying 
amount of an asset may not be recoverable. We measure recoverability of assets to be held and used by a comparison 
of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the 
asset. If the carrying amount of an asset exceeds its estimated future cash flows, we recognize an impairment charge 
by the amount by which the carrying amount of the asset exceeds the fair value of the asset. 

30

 
 
Results of Operations 

  The following table sets forth statement of income data as a percentage of net revenues for the periods 

indicated:

Year Ended December 31,
2015

2014

2016

Net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cost of revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gross profit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating expenses:

Research and development . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sales and marketing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General and administrative . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total operating expenses. . . . . . . . . . . . . . . . . . . . . . . . . .
Income from operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for (benefit from) income taxes . . . . . . . . . . . . . . . . . . . .
Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

100.0%
50.7
49.3

16.1
12.4
8.5
37.0
12.3
0.3
12.6
0.2
12.4%

Comparison of Years Ended December 31, 2016, 2015 and 2014

100.0%
49.6
50.4

16.7
13.6
8.7
39.0
11.4
0.1
11.5
0.1
11.4%

100.0%
45.7
54.3

15.8
13.7
8.9
38.4
16.0
0.3
16.3
(0.8)
17.1%

  Net revenues.  Net revenues consist of revenues from product sales, which are calculated net of returns 
and  allowances.  In  2016  revenues  increased  by  $43.4  million  due  primarily  to  higher  unit  sales  into  the 
communications end-market, largely as a result of the success of our InnoSwitch products in mobile-device chargers. 
In addition, higher unit sales into the consumer market, particularly the consumer-appliance market, contributed 
to the increase in 2016. The increase was partially offset by lower unit sales into the computer end-market, reflecting 
reduced demand for power supplies for desktop computers. In 2015 revenue decreased by $4.8 million, due primarily 
to  lower  unit  sales  into  the  computer  end-market,  reflecting  reduced  demand  for  power  supplies  for  desktop 
computers, and the industrial end-market, reflecting a broad-based slowdown in demand from the industrial sector 
of the economy. These reductions were partially offset by higher unit sales into the communications end-market, 
largely  as  a  result  of  the  success  of  our  InnoSwitch  products  in  mobile-device  chargers  and  the  effect  of  our 
acquisition of CamSemi, whose products are used primarily in the communications end-market.

Our approximate net revenue mix by end-markets served in 2016, 2015 and 2014 is as follows: 

End Market
Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Computer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,
2015

2014

2016

27%
6%
36%
31%

24%
7%
36%
33%

18%
10%
37%
35%

Sales to customers outside of the United States were $372.8 million in 2016, compared to $327.5 million 
in 2015 and $332.8 million in 2014, representing approximately 96% of net revenues in 2016 and 95% in each of 
2015 and 2014.  Although power supplies using our products are designed and distributed worldwide, most of 
these power supplies are manufactured by our customers in Asia. As a result, sales to this region accounted for 
approximately 81% of our net revenues in 2016 and 80% in each of 2015 and 2014. We expect international sales 
to continue to account for a large portion of our net revenues for the foreseeable future. 

31

 
 
  Distributors accounted for 75% of our net product sales for each of the years ended December 31, 2016, 
2015 and 2014, with direct sales to OEMs and merchant power supply manufacturers accounting for the remainder 
in each of the corresponding years. In each of 2016 and 2015 two distributors accounted for more than 10% of 
revenues. In 2014 only one of these distributors accounted for more than 10% of revenues. 

The following customers each accounted for 10% or more of net revenues during these years:

Customer
Avnet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powertech Distribution Ltd. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,
2015

2014

2016

18%
11%

21%
10%

19%
*

_______________
* Total customer revenue was less than 10% of net revenues.

  No other customers accounted for 10% or more of net revenues during these years.  

  Gross profit.  Gross profit is net revenues less cost of revenues. Our cost of revenues consists primarily 
of the purchase of wafers from our contracted foundries, the assembly, packaging and testing of our products by 
sub-contractors, product testing performed in our own facility, overhead associated with the management of our 
supply chain and the amortization of acquired intangible assets.  Gross margin is gross profit divided by net revenues. 
The table below compares gross profit and gross margin for the years ended December 31, 2016, 2015 and 2014:

(dollars in millions)
Gross profit . . . . . . . . . . . . . . . . . . . $
Gross margin . . . . . . . . . . . . . . . .

2016

Change

2015

Change

2014

191.2
49.3%

10.3% $

173.4
50.4%

(8.5)% $

189.6

54.3%

  The decrease in gross margin in each of 2016 and 2015 was due primarily to a change in end-market mix, 
with a greater percentage of revenue coming from lower-margin end-markets, particularly communications. In 
addition, in 2015 we incurred higher period costs resulting from the amortization of intangibles and inventory 
write-up related to our acquisition of CamSemi, which took place in the first quarter of 2015. 

  Research and development expenses.  R&D expenses consist primarily of employee-related expenses 
including stock-based compensation and expensed material and facility costs associated with the development of 
new processes and new products.  We also record R&D expenses for prototype wafers related to new products 
until  the  products  are  released  to  production.  The  table  below  compares  R&D  expenses  for  the  years  ended 
December 31, 2016, 2015 and 2014:

(dollars in millions)
R&D expenses . . . . . . . . . . . . . . . . $
Percentage of net revenues. . . . . .

2016

Change

2015

Change

2014

62.3
16.1%

8.3% $

57.5
16.7%

4.7% $

55.0
15.8%

  R&D expenses increased in 2016 compared to 2015 primarily due to increased stock-based compensation 
expense related to performance-based stock awards expected to vest as a result of our 2016 performance. The 
expansion  of  headcount  in  support  of  our  product-development  efforts  also  contributed  to  the  increase.  R&D 
expenses increased in 2015 as compared to 2014, driven primarily by the addition of employees in connection with 
our  acquisition  of  CamSemi;  the  increase  in  headcount  caused  a  corresponding  increase  in  salary  and  other 
employee-related expenses.

32

 
 
 
Sales  and  marketing  expenses.    Sales  and  marketing  expenses  consist  primarily  of  employee-related 
expenses, including stock-based compensation, commissions to sales representatives, amortization of acquired 
intangible assets and facilities expenses, including expenses associated with our regional sales and support offices.  
The table below compares sales and marketing expenses for the years ended December 31, 2016, 2015 and 2014:

(dollars in millions)
Sales and marketing expenses. . . . . $
Percentage of net revenues. . . . . .

2016

48.0
12.4%

Year Ended December 31,
2015

Change

Change

2.6% $

46.8
13.6%

(2.1)% $

2014

47.8
13.7%

Sales and marketing expenses increased in 2016 compared to 2015 primarily due to increased stock-based 
compensation  expense  related  to  performance-based  stock  awards  expected  to  vest  as  a  result  of  our  2016 
performance. Higher bonus and sales commissions also contributed to the increase. Sales and marketing expenses 
decreased in 2015 compared to 2014 due primarily to lower amortization of acquisition-related intangible assets, 
as our Concept trade name was fully amortized in the second quarter of 2014, and also due to lower advertising 
and promotional expenses in 2015.

General and administrative expenses.  General and administrative, or G&A, expenses consist primarily 
of employee-related expenses, including stock-based compensation expenses for administration, finance, human 
resources and general management, as well as consulting, professional services, legal and auditing expenses. The 
table below compares G&A expenses for the years ended December 31, 2016, 2015 and 2014:

(dollars in millions)
G&A expenses . . . . . . . . . . . . . . . . $
Percentage of net revenues. . . . . .

2016

33.0

8.5%

Change
10.0%

Year Ended December 31,
2015

Change

$

30.0

8.7%

(3.1)% $

2014

31.0

8.9%

G&A expenses increased in 2016 compared to 2015 due primarily to increased stock-based compensation 
expense related to performance-based stock awards expected to vest as a result of our 2016 performance and due 
to increased legal expenses as a result of higher fees in connection with our litigations with ON Semiconductor 
which  recently  acquired  Fairchild  Semiconductor.  G&A  expenses  decreased  in  2015  compared  to  2014  due 
primarily to a decrease in patent litigation expenses and decreased outside service fees relating to our CamSemi 
acquisition which was completed in January 2015. These decreases were partially offset by higher patent (non-
litigation) attorney fees.

Other income.  Other income consists primarily of interest income earned on cash and cash equivalents, 
marketable securities and other investments, and the impact of foreign exchange gains or losses. The table below 
compares other income for the years ended December 31, 2016, 2015 and 2014: 

(dollars in millions)

2016

Change

2015

Change

2014

Other income. . . . . . . . . . . . . . . . . . $

Percentage of net revenues. . . . . .

1.1

0.3%

153.6%   $

0.4

0.1%

(58.3)%   $

1.0

0.3%

Year Ended December 31,

Other income increased in 2016 due primarily to the unfavorable impact in 2015 of foreign currency 
movements relative to the U.S. dollar and the related loss recognized from the remeasurement of monetary foreign 
currency assets and liabilities of our Swiss subsidiary. Other income decreased in 2015 compared to 2014 due 
primarily to the unfavorable impact of foreign currency movements relative to the U.S. dollar and the related loss 
recognized from the remeasurement of monetary foreign currency assets and liabilities of our Swiss subsidiary.

33

 
 
   
 
 
 
 
 
 
 
 
Provision for (benefit from)income taxes.  Provision for (benefit from) income taxes represents federal, 
state and foreign taxes.  The table below compares the provision for income taxes for the years ended December 
31, 2016, 2015 and 2014:

(dollars in millions)

2016

Change

2015

Change

2014

Provision for (benefit from)
income taxes . . . . . . . . . . . . . . . . . $

Percentage of net revenues . . . . .

Effective tax rate. . . . . . . . . . . . .

1.0

0.2%

2.1%

280.8%   $

(109.9)%   $

0.3

0.1%

0.7%

(2.7)

(0.8)%

(4.8)%

Year Ended December 31,

In 2016 and 2015, our effective tax rate was impacted by the geographic distribution of our world-wide 
earnings in lower tax jurisdictions and the federal R&D tax credit. The difference between the 2016 and 2015 tax 
rate is due to additional foreign earnings brought back to the U.S. in 2016. In 2014, our effective tax rate was 
impacted by an agreement reached with the United States Internal Revenue Service to conclude the examination 
of our income tax returns for the years 2007 through 2009. The resolution of the audit resulted in a federal tax 
benefit to us of $2.8 million; we also recorded a state tax benefit of $0.5 million. The one-time benefit included 
the reversal of $4.1 million of related unrecognized tax benefits that had been recorded as non-current liabilities 
in our consolidated balance sheets. Additionally, the rate was favorably impacted by federal research tax credits 
for 2016, 2015 and 2014. 

Liquidity and Capital Resources

We had approximately $250.5 million in cash, cash equivalents and short-term marketable securities at 
December 31, 2016, compared to $173.9 million at December 31, 2015, and $175.3 million at December 31, 
2014. As of December 31, 2016, 2015 and 2014, we had working capital, defined as current assets less current 
liabilities, of approximately $258.6 million, $188.4 million and $210.8 million, respectively. 

On July 5, 2012, we entered into a credit agreement (the "Credit Agreement") with two banks. The Credit 
Agreement provides us with a $100.0 million revolving line of credit to use for general corporate purposes with a 
$20.0 million sub-limit for the issuance of standby and trade letters of credit. The Credit Agreement was amended 
on April 1, 2014, to extend the Credit Agreement termination date from July 5, 2015 to April 1, 2017, with all other 
terms of the Credit Agreement remaining the same. 

On July 27, 2016, we terminated the Credit Agreement and entered into a new Credit Agreement with a 
bank (the "New Credit Agreement"). The New Credit Agreement provides us with a $75.0 million revolving line 
of credit to use for general corporate purposes with a $20.0 million sub-limit for the issuance of standby and trade 
letters of credit. Our ability to borrow under the revolving line of credit is conditioned upon our compliance with 
specified covenants, including reporting and financial covenants, primarily a minimum liquidity measure and a 
debt to earnings ratio, with which we are currently in compliance. The New Credit Agreement terminates on July 
26, 2019; all advances under the revolving line of credit will become due on such date, or earlier in the event of a 
default. As of December 31, 2016, we had no amounts outstanding under our agreement.

Our operating activities generated cash of $97.9 million, $92.2 million, and $85.6 million in the years 
ended December 31, 2016, 2015 and 2014, respectively. In each of these years, cash was primarily generated from 
operating activities in the ordinary course of business. 

In 2016, our net income was $47.9 million, which included stock-based compensation expenses, non-
cash depreciation and amortization of $20.9 million, $16.8 million and $6.7 million, respectively. Sources of cash 
also included: (1) a $7.7 million increase in accounts payable due to the timing of payments; and (2) a $1.1 million
increase  in  deferred  income  on  sales  to  distributors  due  to  increased  inventory  levels  at  our  distributors  in 
anticipation of end-customer demand. These sources of cash were partially offset by a $2.5 million increase in 

34

 
 
 
 
 
 
 
 
 
prepaid expenses and other assets due primarily to an increase in prepaid income taxes and a $1.1 million decrease 
in taxes payable and accrued liabilities.

In 2015, our net income was $39.1 million, which included non-cash depreciation, amortization and stock-
based expenses of $16.5 million, $7.0 million and $14.8 million, respectively. Sources of cash also included: (1) 
a $13.5 million decrease in inventory due to ongoing reduction efforts; (2) a $4.1 million decrease in accounts 
receivable due to the timing of collections; and (3) a $3.4 million decrease in prepaid expenses and other assets 
due to income tax refunds received during the period. These sources of cash were partially offset by a $5.4 million 
increase in deferred taxes.

In 2014, our net income was $59.5 million, which included non-cash depreciation, amortization and stock-
based compensation expenses of $15.9 million, $6.1 million and $14.3 million, respectively. Sources of cash also 
included: (1) a $8.2 million decrease in prepaid expenses and other assets as a result of lower payments related to 
legal and R&D services, in addition to tax refunds received during the year; (2) a $2.1 million decrease in accounts 
receivable as a result of lower sales in the fourth quarter of 2014 compared to 2013 and improved collections; and 
(3) a $2.3 million increase in accounts payable due to the timing of payments. These sources of cash were partially 
offset by a $21.7 million increase in our inventories as a result of lower-than expected sales, and by a $3.2 million 
decrease in taxes payable.

Our investing activities in the year ended December 31, 2016, resulted in a $117.4 million net use of cash, 
consisting primarily of $105.2 million from the purchase of marketable securities, net of maturities, and $12.2 
million for purchases of property and equipment, primarily machinery and equipment for use in the manufacture 
of our products.

Our investing activities in the year ended December 31, 2015, resulted in a net $7.7 million use of cash, 
consisting primarily of $15.5 million in net cash paid for the acquisition of CamSemi, $10.4 million net cash paid 
for a building purchase (refer to Note 11, Acquisitions, in our Notes to Consolidated Financial Statements in this 
Annual Report on Form 10-K, for details) and $11.4 million for purchases of property and equipment, primarily 
machinery and equipment for use in the manufacture of our products. These uses of cash were partially offset by 
$29.6 million of proceeds from the sale and maturity of marketable securities, net of purchases.

Our investing activities in the year ended December 31, 2014, resulted in a net $38.1 million use of cash, 
consisting primarily of: (1) $7.2 million, net, for purchases of marketable securities; (2) $23.1 million for purchases 
of property and equipment, primarily machinery and equipment for production and R&D; (3) $1.3 million for the 
purchase of power.com, our domain name; and (4) a $6.6 million cash payment to CamSemi under a loan agreement 
(refer to Note 11, Acquisitions, in our Notes to Consolidated Financial Statements in this Annual Report on Form 
10-K, for further details).

Our financing activities in the year ended December 31, 2016, resulted in a net use of $8.4 million of 
cash. Financing activities consisted primarily of $6.4 million for the repurchase of our common stock and $15.1 
million for the payment of dividends to stockholders, partially offset by proceeds of $13.1 million from the issuance 
of common stock, including the exercise of employee stock options and the issuance of shares through our employee 
stock purchase plan.

Our financing activities in the year ended December 31, 2015, resulted in a net use of $55.1 million of 
cash. Financing activities consisted primarily of $53.7 million for the repurchase of our common stock and $13.9 
million for the payment of dividends to stockholders, partially offset by proceeds of $12.6 million from the issuance 
of common stock, including the exercise of employee stock options and the issuance of shares through our employee 
stock purchase plan.

Our financing activities in the year ended December 31, 2014, resulted in a net use of $79.6 million of 
cash, consisting primarily of $80.8 million for the repurchase of our common stock, and $13.2 million for the 

35

 
 
 
 
 
 
 
 
payment of dividends to stockholders. The use of cash was partially offset by proceeds of $13.9 million from 
issuance of common stock, including the exercise of employee stock options and the issuance of shares through 
our employee stock purchase plan.

In October 2013, our board of directors declared four quarterly cash dividends in the amount of $0.10 per 
share to be paid to stockholders of record at the end of each quarter in 2014. In April 2014, our board of directors 
increased the quarterly dividends for the third and fourth quarters of 2014 to $0.12 per share. In January 2015, our 
board of directors extended the $0.12 quarterly dividend through each quarter in 2015. In January 2016, our board 
of directors declared four quarterly cash dividends in the amount of $0.13 per share to be paid to stockholders of 
record at the end of each quarter in 2016.

In January 2017, our board of directors declared four quarterly cash dividends in the amount of $0.14 per 
share to be paid to stockholders of record at the end of each quarter in 2017. The declaration of any future cash 
dividend is at the discretion of the board of directors and will depend on our financial condition, results of operations, 
capital requirements, business conditions and other factors, as well as a determination that cash dividends are in 
the best interest of our stockholders.

In the years ended December 31, 2014, and December 31, 2015, our board of directors authorized the use 
of $75.0 million and $60.0 million, respectively, for repurchase of our common stock, with repurchases to be 
executed  according  to  pre-defined  price/volume  guidelines.  In  2016,  we  purchased  146,000  shares  for 
approximately $6.4 million. In the year ended December 31, 2015, we purchased 1.3 million shares for $53.7 
million.  In  the  year  ended  December 31,  2014,  we  purchased  1.6  million  shares  for  $80.8  million.  As  of 
December 31, 2016, we had $23.6 million available for future stock repurchases. Authorization of future repurchase 
programs is at the discretion of the board of directors and will depend on our financial condition, results of operations, 
capital requirements and business conditions as well as other factors.

As of December 31, 2016, we had a contractual obligation related to income tax, consisting primarily of 
unrecognized tax benefits of approximately $15.4 million. The tax obligation was classified as long-term income 
taxes payable or recorded as contra deferred tax assets in our consolidated balance sheet. 

Our cash, cash equivalents and investment balances may change in future periods due to changes in our 
planned cash outlays, including changes in incremental costs such as direct and integration costs related to future 
acquisitions. We expect continued sales growth in our foreign business and plan to use the earnings generated by 
our foreign subsidiaries to continue to fund both the working capital and growth needs of our foreign entities, along 
with providing funding for any future foreign acquisitions. We do not provide for U.S. taxes on undistributed 
earnings of our foreign subsidiaries that we intend to invest indefinitely outside the U.S., unless such taxes are 
otherwise required under U.S. tax law. Beginning in 2013, we determined that a portion of our foreign subsidiaries 
current  and  future  earnings  may  be  remitted  prospectively  to  the  U.S.  for  domestic  cash  flow  purposes  and, 
accordingly, provided for the related U.S. taxes in our consolidated financial statements. Currently the majority 
of our cash and marketable securities are held in the U.S. We may adjust our repatriation strategy depending on 
the U.S. cash needs and our ability to effectively utilize our deferred tax assets. If we change our intent to invest 
our undistributed earnings outside the U.S. indefinitely or if a greater amount of undistributed earnings are needed 
for U.S. operations than previously anticipated and for which U.S. taxes have not been recorded, we would be 
required  to  accrue  or  pay  U.S.  taxes  (subject  to  an  adjustment  for  foreign  tax  credits,  where  applicable)  and 
withholding  taxes  payable  to  various  foreign  countries  on  some  or  all  of  these  undistributed  earnings.   As  of 
December 31, 2016, we had approximately $265.0 million of undistributed earnings of foreign subsidiaries that 
are indefinitely invested outside of the U.S.

If our operating results deteriorate in future periods, either as a result of a decrease in customer demand 
or pricing pressures from our customers or our competitors, or for other reasons, our ability to generate positive 
cash flow from operations may be jeopardized. In that case, we may be forced to use our cash, cash equivalents 
and short-term investments, use our current financing or seek additional financing from third parties to fund our 

36

 
 
 
 
 
 
 
 
operations. We believe that cash generated from operations, together with existing sources of liquidity, will satisfy 
our projected working capital and other cash requirements for at least the next 12 months. 

Off-Balance Sheet Arrangements

As of December 31, 2016 and 2015, we did not have any off-balance sheet arrangements or relationships 
with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or 
special  purpose  entities,  which  are  typically  established  for  the  purpose  of  facilitating  off-balance  sheet 
arrangements or other contractually narrow or limited purposes.

Contractual Obligations

As of December 31, 2016, we had the following contractual obligations and commitments, consisting 

solely of non-cancelable operating lease agreements:

(in thousands)

Total

Less than
1 Year

1 - 3 Years

4 - 5 Years

Over 5 Years

Operating lease obligations. . . . . . . $

4,387

$

1,591

$

1,979

$

459

$

358

Payments Due by Period

In addition to our contractual obligations noted above we have a contractual obligation related to income 
tax  as  of  December  31,  2016,  which  primarily  comprises  unrecognized  tax  benefits  of  approximately  $15.4 
million, and was classified as long-term income taxes payable or recorded as contra deferred tax assets in our 
consolidated balance sheet.

Recently Issued Accounting Announcements

For recently issued accounting announcements, see “Recently Issued Accounting Announcements” in 

Note 2 to Consolidated Financial Statements included in this Annual Report on Form 10-K. 

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Interest Rate Risk.  Our exposure to market risk for changes in interest rates relates primarily to our 
investment portfolio.  We consider cash invested in highly liquid financial instruments with a remaining maturity 
of three months or less at the date of purchase to be cash equivalents.  Investments in highly liquid financial 
instruments with maturities greater than three months are classified as short-term investments. We generally hold 
securities until maturity; however, they may be sold under certain circumstances, including, but not limited to, 
when necessary for the funding of acquisitions and other strategic investments.  As a result of this policy, we 
classify our investment portfolio as available-for-sale. We invest in high-credit quality issuers and, by policy, limit 
the amount of credit exposure to any one issuer. As stated in our policy, we seek to ensure the safety and preservation 
of our invested principal funds by limiting default risk, market risk and reinvestment risk.  We mitigate default 
risk by investing in safe and high-credit quality securities and by constantly positioning our portfolio to respond 
appropriately to a significant reduction in a credit rating of any investment issuer, guarantor or depository. The 
portfolio includes only marketable securities with active secondary or resale markets to facilitate portfolio liquidity.  
At December 31, 2016 and 2015, we held primarily cash equivalents and short-term investments with fixed interest 
rates. We do not hold any instruments for trading purposes.

Our investment securities are subject to market interest rate risk and will vary in value as market interest 
rates fluctuate.  To minimize market risk, we invest in high-credit quality issuers and, by policy, limit the amount 
of credit exposure to any one issuer, and therefore if market interest rates were to increase or decrease by 10% 
from interest rates as of December 31, 2016, or December 31, 2015, the increase or decrease in the fair market 
value of our portfolio on these dates would not have been material. We monitor our investments for impairment 

37

 
 
 
 
 
 
on a periodic basis.  Refer to Note 2, Summary of Significant Accounting Policies, for a tabular presentation of our 
available-for-sale investments and the expected maturity dates.  

Foreign Currency Exchange Risk. As of December 31, 2016, our primary transactional currency was the 
U.S. dollar; in addition, we hold cash in Swiss francs and euros to fund the operation of our Swiss subsidiary. Cash 
balances held in foreign countries are subject to local banking laws and may bear higher or lower risk than cash 
deposited in the United States. The following represents the potential impact on our pretax income from a change 
in the value of the U.S. dollar compared to the Swiss franc and euro as of December 31, 2016. This sensitivity 
analysis applies a change in the U.S. dollar value of 5% and 10%.

 (in thousands of USD)

December 31, 2016

5%

10%

Swiss franc and euro foreign exchange impact. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

71

$

142

The foreign exchange rate fluctuation between the U.S. dollar versus the Swiss franc and euro is recorded 

in other income in our consolidated statements of income. 

We have sales offices in various other foreign countries in which our expenses are denominated in the 
local currency, primary Asia and Western Europe.  From time to time we may enter into foreign currency hedging 
contracts to hedge certain foreign currency transactions.  As of December 31, 2016, and December 31, 2015, we 
did not have an open foreign currency hedge program utilizing foreign currency forward exchange contracts.  

With two of our major suppliers, Seiko Epson Corporation (Epson) and ROHM Lapis Semiconductor 
Co., Ltd. (Lapis) we have wafer supply agreements based in U.S. dollars; however, our agreements with Epson 
and Lapis also allow for mutual sharing of the impact of the exchange rate fluctuation between Japanese yen and 
the U.S. dollar. Each year, our management and these suppliers review and negotiate pricing; the negotiated pricing 
is denominated in U.S. dollars but is subject to contractual exchange rate provisions. The fluctuation in the exchange 
rate is shared equally between us and each of these suppliers. 

Nevertheless, as a result of our above-mentioned supplier agreements, our gross margin is influenced by 
fluctuations in the exchange rate between the U.S. dollar and the Japanese yen. All else being equal, a 10% change 
in the value of the U.S. dollar compared to the Japanese yen would result in a corresponding change in our gross 
margin of approximately 1.0%; this sensitivity may increase or decrease depending on the percentage of our wafer 
supply that we purchase from some of our Japanese suppliers and could subject our gross profit and operating 
results to the potential for material fluctuations.

Item 8. Financial Statements and Supplementary Data.

  The financial statements required by this item are set forth in the pages indicated in Item 15(a), and the 
supplementary data required by this item is included in Note 14, Selected Quarterly Information, in our notes to 
consolidated financial statements. 

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

Not applicable.

Item 9A.  Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

  Management is required to evaluate our disclosure controls and procedures, as defined in Rule 13a-15(e) 
under the Securities Exchange Act of 1934, as amended, or the Exchange Act. Disclosure controls and procedures 
are controls and other procedures designed to provide reasonable assurance that information required to be disclosed 
in our reports filed under the Exchange Act, such as this Annual Report on Form 10-K, is recorded, processed, 
38

 
 
 
 
 
 
summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and 
forms.  Disclosure  controls  and  procedures  include  controls  and  procedures  designed  to  provide  reasonable 
assurance  that  such  information  is  accumulated  and  communicated  to  our  management,  including  our  Chief 
Executive  Officer  and  Chief  Financial  Officer  as  appropriate  to  allow  timely  decisions  regarding  required 
disclosure.  Our  disclosure  controls  and  procedures  include  components  of  our  internal  control  over  financial 
reporting, which consists of control processes designed to provide reasonable assurance regarding the reliability 
of  our  financial  reporting  and  the  preparation  of  financial  statements  in  accordance  with  generally  accepted 
accounting principles in the U.S. To the extent that components of our internal control over financial reporting are 
included within our disclosure controls and procedures, they are included in the scope of our periodic controls 
evaluation.  Based on our management's evaluation (with the participation of our principal executive officer and 
principal financial officer), our principal executive officer and principal financial officer have concluded that our 
disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) were 
effective as of the end of the period covered by this report.  

Management’s Report on Internal Control Over Financial Reporting

  Management  is  responsible  for  establishing  and  maintaining  adequate  internal  control  over  financial 
reporting, as defined in Rule 13a-15(f) under the Exchange Act. Internal control over financial reporting is designed 
to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial 
statements for external reporting purposes in accordance with generally accepted accounting principles. Internal 
control over financial reporting includes those policies and procedures that:

• 

• 

• 

pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions 
and dispositions of our assets;

provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial 
statements in accordance with generally accepted accounting principles and that receipts and expenditures 
are being made only in accordance with authorizations of our management and directors; and

provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use 
or disposition of our assets that could have a material effect on the financial statements.

Internal control over financial reporting cannot provide absolute assurance of achieving financial reporting 
objectives because of its inherent limitations. Internal control over financial reporting is a process that involves 
human  diligence  and  compliance  and  is  subject  to  lapses  in  judgment  and  breakdowns  resulting  from  human 
failures. Because of such limitations, there is a risk that material misstatements may not be prevented or detected 
on a timely basis by internal control over financial reporting.

  Management conducted an assessment of Power Integrations' internal control over financial reporting as 
of December 31, 2016, based on the framework established by the Committee of Sponsoring Organization (COSO) 
of the Treadway Commission in Internal Control - Integrated Framework issued in 2013. Based on this assessment, 
management concluded that, as of December 31, 2016, our internal control over financial reporting was effective.

  The effectiveness of Power Integrations' internal control over financial reporting as of December 31, 
2016, has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in 
their report which appears below.

Changes in Internal Control over Financial Reporting

There were no changes in our internal controls over financial reporting during the fourth quarter of 2016, 
which were identified in connection with management’s evaluation required by paragraph (d) of Rules 13a-15 and 
15d-15 under the Exchange Act, that have materially affected or are reasonably likely to materially affect our 
internal control over financial reporting. 

39

 
 
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of 
Power Integrations, Inc. 
San Jose, California 

  We have audited the internal control over financial reporting of Power Integrations, Inc. and subsidiaries 
(the "Company") as of December 31, 2016, based on criteria established in Internal Control - Integrated Framework
(2013)  issued  by  the  Committee  of  Sponsoring  Organizations  of  the Treadway  Commission. The  Company’s 
management is responsible for maintaining effective internal control over financial reporting and for its assessment 
of  the  effectiveness  of  internal  control  over  financial  reporting,  included  in  the  accompanying  Management’s 
Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s 
internal control over financial reporting based on our audit.

  We conducted our audit in accordance with the standards of the Public Company Accounting Oversight 
Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance 
about whether effective internal control over financial reporting was maintained in all material respects. Our audit 
included obtaining an understanding of internal control over financial reporting, assessing the risk that a material 
weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the 
assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe 
that our audit provides a reasonable basis for our opinion.

  A company’s internal control over financial reporting is a process designed by, or under the supervision 
of, the company’s principal executive and principal financial officers, or persons performing similar functions, 
and  effected  by  the  company’s  Board  of  Directors,  management,  and  other  personnel  to  provide  reasonable 
assurance regarding the reliability of financial reporting and the preparation of financial statements for external 
purposes in accordance with generally accepted accounting principles. A company’s internal control over financial 
reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable 
detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide 
reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in 
accordance with generally accepted accounting principles, and that receipts and expenditures of the company are 
being made only in accordance with authorizations of management and directors of the company; and (3) provide 
reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of 
the company’s assets that could have a material effect on the financial statements. 

  Because of the inherent limitations of internal control over financial reporting, including the possibility 
of collusion or improper management override of controls, material misstatements due to error or fraud may not 
be prevented or detected on a timely basis. Also, projections of any evaluation of the effectiveness of the internal 
control over financial reporting to future periods are subject to the risk that the controls may become inadequate 
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, the Company maintained, in all material respects, effective internal control over financial 
reporting as of December 31, 2016, based on the criteria established in Internal Control - Integrated Framework 
(2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight 
Board (United States), the consolidated financial statements and consolidated financial statement schedule as of 
and for the year ended December 31, 2016 of the Company and our report dated February 8, 2017 expressed an 
unqualified opinion on those consolidated financial statements and consolidated financial statement schedule.

/s/ DELOITTE & TOUCHE LLP

San Jose, California
February 8, 2017

40

 
 
Item 9B. Other Information.

Compensation Matters

On February 2, 2017, the Compensation Committee of the Board of Directors of Power Integrations, Inc. 
(the “Company”) took the following compensation actions with respect to the Company’s chief executive officer, 
chief  financial  officer,  and  other  “named  executive  officers”  as  defined  in  Rule  402  of  SEC  Regulation  S-K 
(collectively, the “Officers”).

2017 Performance Based Incentive Plan

Approved the 2017 Performance Based Incentive Plan (the “2017 PSU Plan”) as follows:

Each officer, as described below, was granted performance stock units, referred to as “PSUs,” which will 
vest (referred to as a “payout” below) based on Company performance as against the 2017 PSU Plan’s established 
net  revenue  targets,  non-GAAP  operating  income  targets  and  strategic  goals,  each  as  established  by  the 
Compensation Committee.  The 2017 target net revenue and non-GAAP operating income levels are intended to 
have difficulty in attainment levels consistent with the Company’s 2016 PSU Plan.

The portion of the performance stock units granted under the 2017 PSU Plan that will vest will be calculated 
independently for each of its net revenue, non-GAAP operating income and strategic goals components. “Net 
revenue” is as set forth in the Company’s annual report for 2017 to be filed with the Securities and Exchange 
Commission (“SEC”). “Non-GAAP operating income” means operating income for 2017 determined in accordance 
with GAAP but excluding the following items:  (i) stock-based compensation expenses recorded under Accounting 
Standards Codification 718; (ii) amortization of acquisition-related intangible assets, and the fair-value write-up 
of acquired inventory; (iii) any other mergers and acquisitions related expenses; and (iv) any other adjustment 
made to arrive at the Company’s non-GAAP financial information as presented in the Company’s SEC filings.   
Further, in the event of any mergers, acquisitions or divestitures, or any patent or other litigation settlements or 
judgments,  during  the  performance  period,  the  net  revenue  and  non-GAAP  operating  income  targets  shall  be 
adjusted based on a revised plan approved by the Board of Directors. The strategic goals component is made up 
of five different strategic goals for the Company.

Weighting of the target components is as follows:

Net revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Non-GAAP operating income. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strategic goals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

40%

30%

30%

100%

 Net Revenue Component of the 2017 PSU Plan:

No payout will be made under the net revenue component of the 2017 PSU Plan if the Company's 2017 
actual net revenue does not exceed at least the established minimum amount of net revenue as set forth in the 2017 
PSU Plan. To the extent 2017 actual net revenue is above the minimum amount of net revenue, the payout increases 
linearly from zero at the minimum amount of net revenue as set forth in the 2017 PSU Plan up to 100% of the net 
revenue component of the target when actual net revenue equals target net revenue in the 2017 PSU Plan.  If 2017 
actual net revenue is above the target amount of net revenue, then the payout for performance above target increases 
linearly from the target amount up to a maximum of 200% of the net revenue component of the target when actual 
net revenue equals or exceeds the established target to achieve the maximum amount payout under the net revenue 
component of the 2017 PSU Plan.

41

 
Non-GAAP Operating Income Component of the 2017 PSU Plan:

No payout will be made under the non-GAAP operating income component of the 2017 PSU Plan if the 
Company's 2017 actual non-GAAP operating income does not exceed at least the established minimum amount 
of non-GAAP operating income as set forth in the 2017 PSU Plan. To the extent 2017 actual non-GAAP operating 
income is above the minimum amount of non-GAAP operating income, the payout increases linearly from zero at 
the minimum amount of non-GAAP operating income as set forth in the 2017 PSU Plan up to 100% of the non-
GAAP operating income component of the target when actual non-GAAP operating income equals target non-
GAAP operating income in the 2017 PSU Plan.  If 2017 actual non-GAAP operating income is above the target 
amount of non-GAAP operating income, then the payout for performance above target increases linearly from the 
target amount up to a maximum of 200% of the non-GAAP operating income component of the target when actual 
non-GAAP operating income equals or exceeds the established target to achieve the maximum amount payout 
under the non-GAAP operating income component of the 2017 PSU Plan.

Strategic Goals Component of the 2017 PSU Plan:

Each of the five goals in the strategic goals component of the 2017 PSU Plan is assigned a percentage, 
which percentages range from 1% to 21%, and which collectively add up to 30%.  Other than with respect to date-
based goals, if the Company's 2017 actual achievement of a goal does not exceed at least the established minimum 
requirement for a particular goal, then no amount is earned for that goal. To the extent 2017 actual performance 
for a goal is better than the established minimum for the goal, then the payout increases linearly from zero at the 
minimum amount of performance as set forth in the 2017 PSU Plan up to 100% of the amount for that goal when 
actual performance equals target performance for that goal in the 2017 PSU Plan.  Other than with respect to date-
based goals, to the extent 2017 actual performance for a goal is better than the established target for the goal, then 
the payout for performance above target increasing linearly from the target amount actual performance, up to a 
maximum of 200% for the specific goal when actual performance equals or exceeds the established target to achieve 
the maximum payout under the specific goal as set forth in the 2017 PSU Plan.

2017 Target Performance Stock Units

Approved the 2017 target performance stock units for the Officers as follows:

Executive Officer

Title

2017 Target PSUs

Balu Balakrishnan

President and Chief Executive Officer . . . . . . . . . . . . . . . . . . . . . . . . .

Sandeep Nayyar

Chief Financial Officer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Radu Barsan

Clifford Walker

Raja Petrakian

Vice President, Technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vice President, Corporate Development. . . . . . . . . . . . . . . . . . . . . . . .

Vice President, Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10,000

3,000

2,500

2,200

2,200

The actual number of shares subject to the performance stock units is twice the target level shown in the 
table above to enable the payout of up to 200% of the target amount if the actual net revenue, non-GAAP operating 
income and strategic goals achievement equal or exceed the established levels to achieve the maximum amount 
of the 2017 PSU Plan.

42

 
 
 
2017 Restricted Stock Unit Grants

Approved restricted stock unit, referred to as RSU, grants to the following Officers:

Executive Officer

Title

2017 RSU Grants

Balu Balakrishnan

President and Chief Executive Officer . . . . . . . . . . . . . . . . . . . . . . . . .

Sandeep Nayyar

Chief Financial Officer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Radu Barsan

Clifford Walker

Raja Petrakian

Vice President, Technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vice President, Corporate Development. . . . . . . . . . . . . . . . . . . . . . . .

Vice President, Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

48,000

10,500

9,000

7,500

7,500

The RSU grants will be effective on the grant date. Twenty-five percent (25%) of the RSUs vest on the 
one year anniversary of the vesting commencement date (as specified in the Officers' RSU award agreements), 
and an additional twenty-five percent (25%) of the RSUs vest annually over the next three (3) years thereafter, 
subject to the respective Officer's continuous service.

2017 Long Term Performance Based Incentive Plan 

Approved the 2017 Long Term Performance Based Incentive Plan (“2017 PRSU Plan”) as follows:

Each officer, as described below, was granted long term performance stock units, referred to as “PRSUs,” 
which will vest (referred to as a “payout” below) based on Company performance as against the 2017 PRSU Plan's 
established 2019 net revenue target, as established by the Compensation Committee.  The 2019 net revenue target 
level is intended to have a difficulty in attainment level consistent with the Company’s 2016 PRSU Plan target net 
revenue level.  The portion of the performance stock units that will vest will be calculated based on the Company’s 
2019 net revenue and awarded in early 2020 upon approval by the Compensation Committee. “Net revenue” is as 
set forth in the Company’s annual report for 2019 to be filed with the SEC.  Further, in the event of any mergers, 
acquisitions or divestitures, or any patent or other litigation settlements or judgments, during the performance 
period, the net revenue target shall be adjusted based on a revised plan approved by the Board of Directors.

No payout will be made in early 2020 under the 2017 PRSU Plan if the Company's 2019 actual net revenue 
does not exceed at least the established minimum amount of net revenue as set forth in the 2017 PRSU Plan. To 
the extent 2019 actual net revenue is above the minimum amount of net revenue, the payout increases linearly 
from zero at the minimum amount of net revenue as set forth in the 2017 PRSU Plan up to 100% of the net revenue 
component of the target when actual net revenue equals target net revenue in the 2017 PRSU Plan.  If 2019 actual 
net revenue is above the target amount of net revenue, then the payout for performance above target increases 
linearly from the target amount up to a maximum of 200% of the net revenue component of the target when actual 
net revenue equals or exceeds the established target to achieve the maximum amount payout under the 2017 PRSU 
Plan. Except to the extent provided in the executive officer benefits agreements between the Company and each 
Officer, each Officer must be employed through the end of the performance period to receive stock pursuant to 
the PRSUs under the 2017 PRSU Plan.

43

 
2017 Target PRSUs

Approved the target 2017 PRSUs for the Officers as follows:

Executive Officer

Title

2017 Target PRSUs

Balu Balakrishnan

President and Chief Executive Officer . . . . . . . . . . . . . . . . . . . . . . . . .

Sandeep Nayyar

Chief Financial Officer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Radu Barsan

Clifford Walker

Raja Petrakian

Vice President, Technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vice President, Corporate Development. . . . . . . . . . . . . . . . . . . . . . . .

Vice President, Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16,000

3,500

3,000

2,500

2,500

The actual number of shares subject to the PRSUs is twice the target level shown in the table above to 
enable the payout of up to 200% of the target amount if actual net revenue equals or exceeds the established level 
to achieve the maximum amount of the 2017 PRSU Plan.

2017 Salaries

Approved the 2017 salaries for the Officers, to be effective March 27, 2017, as follows:

Executive Officer

Title

Balu Balakrishnan

President and Chief Executive Officer . . . . . . . . . . . . . . . . . . . . . . . . .

Sandeep Nayyar

Chief Financial Officer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Radu Barsan

Clifford Walker

Raja Petrakian

Vice President, Technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vice President, Corporate Development. . . . . . . . . . . . . . . . . . . . . . . .

Vice President, Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2017 Salary

$575,000

$350,000

$325,000

$325,000

$300,000

44

 
Item 10. Directors, Executive Officers and Corporate Governance. 

PART III

  The  names  of  our  executive  officers  and  their  ages,  titles  and  biographies  as  of  the  date  hereof  are 

incorporated by reference from Part I, Item 1, above.  

  The following information is included in our Notice of Annual Meeting of Stockholders and Proxy 
Statement to be filed within 120 days after our fiscal year end of December 31, 2016, or the Proxy Statement, 
and is incorporated herein by reference:

• 

• 

• 

• 

• 

Information regarding our directors and any persons nominated to become a director is set forth 
under the caption “Proposal 1 Election of Directors.”

Information regarding our audit committee and our designated “audit committee financial expert” 
is set forth under the captions “Information Regarding the Board and its Committees” and “Audit 
Committee” under “Proposal 1 Election of Directors” and “Report of the Audit Committee of the 
Board.”

Information on our code of business conduct and ethics for directors, officers and employees is set 
forth  under  the  caption  “Code  of  Business  Conduct  and  Ethics”  under  “Proposal  1  Election  of 
Directors.”

Information regarding Section 16(a) beneficial ownership reporting compliance is set forth under 
the caption “Section 16(a) Beneficial Ownership Reporting Compliance.”

Information regarding procedures by which stockholders may recommend nominees to our board 
of directors is set forth under the caption “Nominating and Governance Committee” under “Proposal 
1 Election of Directors.”

Item 11. Executive Compensation. 

Information  regarding  compensation  of  our  named  executive  officers  is  set  forth  under  the  caption 
“Compensation  of  Executive  Officers”  in  the  Proxy  Statement,  which  information  is  incorporated  herein  by 
reference.  

Information regarding compensation of our directors is set forth under the caption “Compensation of 

Directors” in the Proxy Statement, which information is incorporated herein by reference.

Information relating to compensation policies and practices as they relate to risk management is set forth 
under the caption “Compensation Policies and Practices as They Relate to Risk Management” under “Proposal 
1 Election of Directors” in the Proxy Statement, which information is incorporated herein by reference.

Information regarding compensation committee interlocks is set forth under the caption "Compensation 
Committee Interlocks and Insider Participation" in the Proxy Statement, which information is incorporated herein 
by reference.  

The Compensation Committee Report is set forth under the caption “Compensation Committee Report” 

in the Proxy Statement, which report is incorporated herein by reference.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder 
Matters. 

Information regarding security ownership of certain beneficial owners, directors and executive officers 
is set forth under the caption “Security Ownership of Certain Beneficial Owners and Management” in the Proxy 
Statement, which information is incorporated herein by reference.

45

 
 
 
 
 
 
Information regarding our equity compensation plans, including both stockholder approved plans and 
non-stockholder approved plans, is set forth under the caption “Equity Compensation Plan Information” in the 
Proxy Statement, which information is incorporated herein by reference.

Item 13. Certain Relationships and Related Transactions, and Director Independence. 

Information regarding certain relationships and related transactions is set forth under the caption “Certain 
Relationships and Related Transactions” in the Proxy Statement, which information is incorporated herein by 
reference.

Information  regarding  director  independence  is  set  forth  under  the  caption  “Proposal  1  -  Election  of 

Directors” in the Proxy Statement, which information is incorporated herein by reference.

Item 14. Principal Accounting Fees and Services.

Information regarding principal auditor fees and services is set forth under “Principal Accountant Fees 
and  Services”  in  the  Proposal  with  the  caption  “Ratification  of  Selection  of  Independent  Registered  Public 
Accounting Firm” in the Proxy Statement, which information is incorporated herein by reference.

46

 
 
 
 
 
PART IV

Item 15. Exhibits, Financial Statement Schedules

(a) The following documents are filed as part of this Form: 

1. Financial Statements 

Report of Independent Registered Public Accounting Firm . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Balance Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Comprehensive Income. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Stockholders' Equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Cash Flows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes to Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page
48
49
50
51
52
53
54

2. Financial Statement Schedules 

Schedule II:  Valuation and Qualifying Accounts.

All other schedules are omitted because they are not applicable or the required information is 

shown in the consolidated financial statements or notes thereto. 

3. Exhibits 

See Index to Exhibits at the end of this Report, which is incorporated herein by reference.  The 

Exhibits listed in the accompanying Index to Exhibits are filed as part of this report. 

47

 
 
 
 
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of
Power Integrations, Inc.
San Jose, California

  We  have  audited  the  accompanying  consolidated  balance  sheets  of  Power  Integrations,  Inc.  and 
subsidiaries  (the  “Company”)  as  of  December  31,  2016  and  2015,  and  the  related  consolidated  statements  of 
income, comprehensive income, stockholders’ equity, and cash flows for each of the three years in the period ended 
December 31, 2016.  Our audits also included the consolidated financial statement schedule listed in the Index at 
Item  15.   These  consolidated  financial  statements  and  consolidated  financial  statement  schedule  are  the 
responsibility of the Company’s management.  Our responsibility is to express an opinion on the consolidated 
financial statements and consolidated financial statement schedule based on our audits.

  We conducted our audits in accordance with the standards of the Public Company Accounting Oversight 
Board (United States).  Those standards require that we plan and perform the audit to obtain reasonable assurance 
about whether the consolidated financial statements are free of material misstatement.  An audit includes examining, 
on a test basis, evidence supporting the amounts and disclosures in the consolidated financial statements.  An audit 
also includes assessing the accounting principles used and significant estimates made by management, as well as 
evaluating the overall consolidated financial statement presentation.  We believe that our audits provide a reasonable 
basis for our opinion.

In our opinion, such consolidated financial statements present fairly, in all material respects, the financial 
position  of  Power  Integrations,  Inc.  and  subsidiaries  at  December  31,  2016  and  2015,  and  the  results  of  their 
operations and their cash flows for each of the three years in the period ended December 31, 2016, in conformity 
with  accounting  principles  generally  accepted  in  the  United  States  of America.  Also,  in  our  opinion,  such 
consolidated financial statement schedule, when considered in relation to the basic consolidated financial statements 
taken as a whole, presents fairly, in all material respects, the information set forth therein.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight 
Board (United States), the Company's internal control over financial reporting as of December 31, 2016 based on 
the criteria established in Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring 
Organizations  of  the Treadway  Commission,  and  our  report  dated  February 8,  2017  expressed  an  unqualified 
opinion on the Company’s internal control over financial reporting.

/s/ DELOITTE & TOUCHE LLP

San Jose, California
February 8, 2017

48

 
 
 
POWER INTEGRATIONS, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands, except share amounts and par value)
ASSETS

CURRENT ASSETS:

December 31,
2016

December 31,
2015

Cash and cash equivalents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Short-term marketable securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

62,134 $

188,323

Accounts receivable, net of allowance of $525 and $318 in 2016 and 2015,
respectively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inventories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Prepaid expenses and other current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PROPERTY AND EQUIPMENT, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTANGIBLE ASSETS, net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GOODWILL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEFERRED TAX ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OTHER ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6,961

52,564

8,520

318,502
95,296
31,502
91,849
12,032
6,157

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

555,338 $

LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:

Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Accrued payroll and related expenses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Taxes payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Deferred income on sales to distributors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other accrued liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total current liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LONG-TERM INCOME TAXES PAYABLE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DEFERRED TAX LIABILITIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OTHER LIABILITIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total liabilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMMITMENTS AND CONTINGENCIES (NOTES 8, 9 and 10)
STOCKHOLDERS’ EQUITY:

Common stock, $0.001 par value

Authorized - 140,000,000 shares

29,727 $

10,756

729

16,207

2,434

59,853

2,639

820

3,921

67,233

Outstanding - 29,249,635 and 28,652,178 shares in 2016 and 2015,
respectively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional paid-in capital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accumulated other comprehensive loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Retained earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total stockholders’ equity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

28

172,875

(2,710)

317,912

488,105

Total liabilities and stockholders’ equity. . . . . . . . . . . . . . . . . . . . . . . . . . . . $

555,338 $

90,092

83,769

7,818

51,934

6,790

240,403
99,381
38,165
91,849
11,843
5,896

487,537

21,660

9,327

3,620

15,101

2,285

51,993

2,511

1,291

3,123

58,918

28

145,366

(1,851)

285,076

428,619

487,537

The accompanying notes are an integral part of these consolidated financial statements.

49

 
 
POWER INTEGRATIONS, INC.

CONSOLIDATED STATEMENTS OF INCOME

348,797

159,227

189,570

54,981

47,796

30,997

133,774

55,796

1,018

56,814

(2,730)

59,544

1.99

1.93

29,976

30,829

Year Ended December 31,

2016

2015

2014

 (in thousands, except per share amounts)
NET REVENUES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
COST OF REVENUES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GROSS PROFIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATING EXPENSES:

Research and development . . . . . . . . . . . . . . . . . . . . . . . .

Sales and marketing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General and administrative . . . . . . . . . . . . . . . . . . . . . . . .

Total operating expenses . . . . . . . . . . . . . . . . . . . . . .

INCOME FROM OPERATIONS . . . . . . . . . . . . . . . . . . . . . . .

OTHER INCOME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INCOME BEFORE INCOME TAXES. . . . . . . . . . . . . . . . . . .

PROVISION FOR (BENEFIT FROM) INCOME TAXES . . .

387,393

$

343,989

$

196,232

191,161

62,310

47,978

33,029

143,317

47,844

1,078

48,922

1,032

170,602

173,387

57,549

46,816

30,029

134,394

38,993

425

39,418

271

NET INCOME. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

47,890

$

39,147

$

EARNINGS PER SHARE:

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

1.66

1.62

$

$

1.35

1.32

$

$

SHARES USED IN PER SHARE CALCULATION:

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

28,925

29,619

29,001

29,696

The accompanying notes are an integral part of these consolidated financial statements.

50

 
POWER INTEGRATIONS, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

 (in thousands)

Year Ended December 31,
2015

2014

2016

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

47,890

$

39,147

$

59,544

Other comprehensive income (loss), net of tax

Foreign currency translation adjustments, net of $0 tax in
2016, 2015 and 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unrealized loss on marketable securities, net of $0 tax in
2016, 2015 and 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unrealized actuarial loss on pension benefits, net of tax
of $98, $96 and $128 in 2016, 2015 and 2014,
respectively. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total other comprehensive loss. . . . . . . . . . . . . . . . . . .

(384)

(123)

(352)

(859)

(191)

(180)

(344)

(715)

(79)

(127)

(460)

(666)

Total comprehensive income . . . . . . . . . . . . . . . . . . . . . . . . . . . $

47,031

$

38,432

$

58,878

The accompanying notes are an integral part of these consolidated financial statements.

51

 
POWER INTEGRATIONS, INC.
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(in thousands)

Common Stock

Additional 
Paid-In

Shares Amount

Capital

Accumulated
Other 

Comprehensive Retained
  Earnings

Loss

Total
Stockholders’

Equity

BALANCE AT JANUARY 1, 2014. . . . . . . . . . . . . . .

30,022 $

30 $

223,660 $

(470) $ 213,466 $

436,686

Issuance of common stock under employee stock
option and stock award plans . . . . . . . . . . . . . . . . . . . .

697

Repurchase of common stock . . . . . . . . . . . . . . . . . . . .

(1,603)

—

(1)

9,571

(80,760)

Issuance of common stock under employee stock
purchase plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income tax benefits from employee stock plans. . . . . .

Stock-based compensation expense related to
employee stock options and awards . . . . . . . . . . . . . . .

Stock-based compensation expense related to
employee stock purchases. . . . . . . . . . . . . . . . . . . . . . .

Payment of dividends to stockholders . . . . . . . . . . . . .

Unrealized actuarial loss on pension benefits. . . . . . . .

Unrealized gain on marketable securities . . . . . . . . . . .

Foreign currency translation adjustment. . . . . . . . . . . .

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

92

—

—

—

—

—

—

—

—

BALANCE AT DECEMBER 31, 2014 . . . . . . . . . . . .

29,208

—

—

—

—

—

—

—

—

—

29

Issuance of common stock under employee stock
option and stock award plans . . . . . . . . . . . . . . . . . . . .

Repurchase of common stock . . . . . . . . . . . . . . . . . . . .
Issuance of common stock under employee stock
purchase plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income tax shortfall from employee stock plans . . . . .
Stock-based compensation expense related to
employee stock options and awards . . . . . . . . . . . . . . .

Stock-based compensation expense related to
employee stock purchases. . . . . . . . . . . . . . . . . . . . . . .

Payment of dividends to stockholders . . . . . . . . . . . . .

Unrealized actuarial loss on pension benefits. . . . . . . .

Unrealized loss on marketable securities . . . . . . . . . . .

Foreign currency translation adjustment. . . . . . . . . . . .

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

117

—

—

—

—

—

—

—

—

BALANCE AT DECEMBER 31, 2015 . . . . . . . . . . . .

28,653

Issuance of common stock under employee stock
option and stock award plans . . . . . . . . . . . . . . . . . . . .

Repurchase of common stock . . . . . . . . . . . . . . . . . . . .
Issuance of common stock under employee stock
purchase plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stock-based compensation expense related to
employee stock awards . . . . . . . . . . . . . . . . . . . . . . . . .

Stock-based compensation expense related to
employee stock purchases. . . . . . . . . . . . . . . . . . . . . . .

Payment of dividends to stockholders . . . . . . . . . . . . .

Unrealized actuarial loss on pension benefits. . . . . . . .

Unrealized loss on marketable securities . . . . . . . . . . .

Foreign currency translation adjustment. . . . . . . . . . . .

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

615

(146)

128

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

28

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

(460)

(127)

(79)

—

—

—

—

—

—

—

(13,165)

—

—

—

59,544

—

—

—

—

—

—

—

(344)

(180)

(191)

—

—

—

—

—

—

—

(13,916)

—

—

—

39,147

4,284

815

12,983

1,385

—

—

—

—

—

4,447

(189)

13,562

1,205

—

—

—

—

—

145,366

(1,851)

285,076

8,479

(6,435)

4,580

19,599

1,286

—

—

—

—

—

—

—

—

—

—

—

(352)

(123)

(384)

—

—

—

—

—

—

(15,054)

—

—

—

47,890

9,571

(80,761)

4,284

815

12,983

1,385

(13,165)

(460)

(127)

(79)

59,544

430,676

8,133

(53,731)

4,447

(189)

13,562

1,205

(13,916)

(344)

(180)

(191)

39,147

428,619

8,479

(6,435)

4,580

19,599

1,286

(15,054)

(352)

(123)

(384)

47,890

488,105

171,938

(1,136)

259,845

578

(1,250)

—

(1)

8,133

(53,730)

BALANCE AT DECEMBER 31, 2016 . . . . . . . . . . . .

29,250 $

28 $

172,875 $

(2,710) $ 317,912 $

The accompanying notes are an integral part of these consolidated financial statements.

52

POWER INTEGRATIONS, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS

 (in thousands)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Adjustments to reconcile net income to net cash provided by
operating activities:

Depreciation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amortization of intangibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss on disposal of property and equipment . . . . . . . . . . . . . . . .
Stock-based compensation expense. . . . . . . . . . . . . . . . . . . . . . .
Amortization of premium on marketable securities . . . . . . . . . .
Deferred income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Increase in accounts receivable allowances. . . . . . . . . . . . . . . . .
Excess tax benefit from employee stock plans . . . . . . . . . . . . . .
Tax (shortfall) benefit associated with employee stock plans . . .
Change in operating assets and liabilities:

Accounts receivable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inventories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses and other assets . . . . . . . . . . . . . . . . . . . .
Accounts payable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taxes payable and accrued liabilities . . . . . . . . . . . . . . . . .
Deferred income on sales to distributors . . . . . . . . . . . . . . .
Net cash provided by operating activities . . . . . . . . .

CASH FLOWS FROM INVESTING ACTIVITIES:

Purchases of property and equipment . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Payment for purchase of building (Note 11) . . . . . . . . . . . . . . . .
Payment for acquisition, net of cash acquired (Note 11). . . . . . .
Loans to third parties (Notes 11) . . . . . . . . . . . . . . . . . . . . . . . . .
Purchases of marketable securities . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from sales and maturities of marketable securities . . .
Net cash used in investing activities . . . . . . . . . . . . .

CASH FLOWS FROM FINANCING ACTIVITIES:

Issuance of common stock under employee stock plans . . . . . . .
Repurchase of common stock . . . . . . . . . . . . . . . . . . . . . . . . . . .
Payments of dividends to stockholders . . . . . . . . . . . . . . . . . . . .
Excess tax benefit from employee stock plans . . . . . . . . . . . . . .
Net cash used in financing activities. . . . . . . . . . . . .

NET INCREASE (DECREASE) IN CASH AND CASH
EQUIVALENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CASH AND CASH EQUIVALENTS AT BEGINNING OF
PERIOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CASH AND CASH EQUIVALENTS AT END OF PERIOD. . . . . $
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING
AND FINANCING ACTIVITIES:

 Year Ended December 31,
2015

2014

2016

47,890

$

39,147

$

59,544

16,812
6,663
332
20,885
555
(660)
207
—
—

650
(630)
(2,499)
7,714
(1,124)
1,106
97,901

(12,198)
—
—
—
—
(188,654)
83,423
(117,429)

13,059
(6,435)
(15,054)
—
(8,430)

(27,958)

90,092

16,464
7,039
361
14,767
1,063
(5,416)
127
—
(189)

4,131
13,500
3,391
(2,000)
(76)
(122)
92,187

(11,359)
—
(10,389)
(15,549)
—
(29,748)
59,309
(7,736)

12,580
(53,731)
(13,916)
—
(55,067)

29,384

60,708

62,134

$

90,092

$

15,884
6,072
250
14,282
1,694
157
70
(437)
815

2,133
(21,703)
8,211
2,337
(3,242)
(505)
85,562

(23,071)
(1,261)
—
—
(6,600)
(45,269)
38,052
(38,149)

13,855
(80,760)
(13,165)
437
(79,633)

(32,220)

92,928

60,708

Unpaid property and equipment . . . . . . . . . . . . . . . . . . . . . . . . . $
Loan applied to CamSemi purchase price (Note 11). . . . . . . . . . $

1,825

$
— $

1,472
6,600

$
$

1,733
—

SUPPLEMENTAL DISCLOSURE OF CASH FLOW
INFORMATION:

Cash paid (refund) for income taxes, net of refunds (Note 8) . . . $

6,613

$

473

$

(3,121)

The accompanying notes are an integral part of these consolidated financial statements.

53

 
POWER INTEGRATIONS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. THE COMPANY:

Power Integrations, Inc. (“Power Integrations” or the “Company”), incorporated in California on March 
25, 1988, and reincorporated in Delaware in December 1997, designs, develops, manufactures and markets analog 
and mixed-signal integrated circuits (ICs) and other electronic components and circuitry used in high-voltage 
power conversion. The Company’s products are used in power converters that convert electricity from a high-
voltage source (typically 48 volts or higher) to the type of power required for a specified downstream use.  A 
large percentage of the Company’s products are ICs used in AC-DC power supplies in a wide variety of end 
products, primarily in the consumer, communications, computer and industrial markets. The Company also offers 
IGBT drivers used to operate arrays of high-voltage, high-power transistors known as IGBT modules, which are 
used for power conversion in high-power applications such as industrial motors, solar- and wind-power systems, 
electric vehicles and high-voltage DC transmission systems.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

Principles of Consolidation 

  The  consolidated  financial  statements  include  the  accounts  of  the  Company  and  its  wholly  owned 

subsidiaries after elimination of all intercompany transactions and balances. 

Estimates 

  The preparation of financial statements in conformity with U.S. GAAP requires management to make 
estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent 
assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses 
during the reporting period.  Actual results could differ from those estimates.  On an ongoing basis, the Company 
evaluates  its  estimates,  including  those  related  to  revenue  recognition  and  allowances  for  receivables  and 
inventories.  These estimates are based on historical facts and various other factors, which the Company believes 
to be reasonable at the time the estimates are made. However, as the effects of future events cannot be determined 
with precision, actual results could differ significantly from management’s estimates.

Cash and Cash Equivalents 

The  Company  considers  cash  invested  in  highly  liquid  financial  instruments  with  maturities  of  three 

months or less at the date of purchase to be cash equivalents.  

Marketable Securities

The  Company  generally  holds  securities  until  maturity;  however,  they  may  be  sold  under  certain 
circumstances including, but not limited to, when necessary for the funding of acquisitions and other strategic 
investments. As  a  result  the  Company  classifies  its  investment  portfolio  as  available-for-sale.  The  Company 
classifies all investments with a maturity date greater than three months at the date of purchase as short-term 
marketable securities in its Consolidated Balance Sheet. As of December 31, 2016, and December 31, 2015, the 
Company’s marketable securities consisted primarily of commercial paper, corporate bonds and other high-quality 
commercial securities. The weighted average interest rate of investments at December 31, 2016 and December 31, 
2015, was approximately 1.23% and 0.84%, respectively.  

54

 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Amortized cost and estimated fair market value of investments classified as available-for-sale (excluding 

cash equivalents) at December 31, 2016, were as follows: 

(in thousands)
Investments due in less than 3 months:

Commercial paper . . . . . . . . . . . . . . . . . . . $
Corporate securities . . . . . . . . . . . . . . . . . .
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Investments due in 4-12 months:

Commercial paper . . . . . . . . . . . . . . . . . . .
Corporate securities . . . . . . . . . . . . . . . . . .
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Investments due 12 months or greater:

Corporate securities . . . . . . . . . . . . . . . . . .
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total investment securities . . . . . . . . . . . . . . $

Amortized
Cost

Gross Unrealized

Gains

Losses

Estimated Fair
 Market Value

$

36,996
9,342
46,338

19,186
59,714
78,900

63,305
63,305
188,543

$

— $
2
2

—
15
15

21
21
38 $

— $
(2)
(2)

—
(76)
(76)

(180)
(180)
(258) $

36,996
9,342
46,338

19,186
59,653
78,839

63,146
63,146
188,323

Amortized cost and estimated fair market value of investments classified as available-for-sale (excluding 

cash equivalents) at December 31, 2015, were as follows:

(in thousands)
Investments due in less than 3 months:
      Corporate securities . . . . . . . . . . . . . . . . . . $
      Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Investments due in 4-12 months:

Corporate securities . . . . . . . . . . . . . . . . . .
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Investments due between 12 months or
greater:

Corporate securities . . . . . . . . . . . . . . . . . .
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total investment securities . . . . . . . . . . . . . . $

Amortized
Cost

Gross Unrealized

Gains

Losses

Estimated Fair
Market Value

$

38,586
38,586

33,654
33,654

11,626
11,626
83,866

$

7 $
7

1
1

—
—
8 $

(10) $
(10)

(36)
(36)

(59)
(59)
(105) $

38,583
38,583

33,619
33,619

11,567
11,567
83,769

As of December 31, 2016, and 2015, there were no individual securities that had been in a continuous 

loss position for 12 months or longer.

Inventories

Inventories (which consist of costs associated with the purchases of wafers from domestic and offshore 
foundries  and  of  packaged  components  from  offshore  assembly  manufacturers,  as  well  as  internal  labor  and 
overhead associated with the testing of both wafers and packaged components) are stated at the lower of cost (first-
in, first-out) or market.  Provisions, when required, are made to reduce excess and obsolete inventories to their 
estimated net realizable values.  Inventories consist of the following: 

55

 
 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(in thousands)
Raw materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Work-in-process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Finished goods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Additional Components of the Company’s Consolidated Balance Sheet

Accounts receivable:

(in thousands)
Accounts receivable trade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Accrued ship and debit and rebate claims. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allowance for doubtful accounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Prepaid expenses and other current assets:

(in thousands)
Prepaid legal fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Advance to suppliers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid income tax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid maintenance agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Property and Equipment

Property and equipment consist of the following:

(in thousands)
Land. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Construction-in-progress. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Building and improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Machinery and equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Computer software and hardware and office furniture and fixtures . . . . . . . . . . . . . .

Accumulated depreciation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

December 31,
2016

December 31,
2015

14,610
15,194
22,760
52,564

December 31,
2016

46,849
(39,363)
(525)
6,961

December 31,
2016

212
69
2,431
1,399
743
3,666
8,520

December 31,
2016

20,288
6,880
52,156
132,162
45,951
257,437
(162,141)
95,296

$

$

$

$

$

$

$

$

19,090
12,770
20,074
51,934

December 31,
2015

43,622
(35,486)
(318)
7,818

December 31,
2015

2,023
324
309
736
519
2,879
6,790

December 31,
2015

20,288
2,298
51,941
128,342
43,383
246,252
(146,871)
99,381

  Depreciation expense for property and equipment for fiscal years ended December 31, 2016, 2015 and 
2014, was approximately $16.8 million, $16.5 million and $15.9 million, respectively, and was determined using 
the straight-line method over the following useful lives:

Building and improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40 years
2-8 years
Machinery and equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-7 years
Computer software and hardware and office furniture and fixtures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

56

 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Total  property  and  equipment  (excluding  accumulated  depreciation)  located  in  the  United  States  at 
December 31,  2016,  2015  and  2014,  was  approximately  $155.1  million,  $150.1  million  and  $140.0  million, 
respectively. In each of 2016 and 2015, approximately 12% of total property and equipment (excluding accumulated 
depreciation) was held in Thailand by one of the Company’s subcontractors. In 2014 approximately 13% of total 
property and equipment was held in Thailand by one of the Company’s subcontractors.

Accumulated Other Comprehensive Loss

Changes in accumulated other comprehensive income (loss) for the three years ended December 31, 2016:

(in thousands)
Balance at January 1, 2014. . . . . . . . . . . . . . . . . . . . . $

Unrealized
Gains and
Losses on
Available-for-
Sale Securities
210

Defined
Benefit
Pension Items
$

(780)

Foreign
Currency
Items

Total

$

100

$

(470)

Other comprehensive income (loss) before
reclassifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Amounts reclassified from accumulated other
comprehensive income (loss) . . . . . . . . . . . . . . . . . . .
Other comprehensive income loss . . . . . . . . . . . . . . .
Balance at December 31, 2014. . . . . . . . . . . . . . . . . .

Other comprehensive income (loss) before
reclassifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Amounts reclassified from accumulated other
comprehensive income (loss) . . . . . . . . . . . . . . . . . . .
Other comprehensive loss . . . . . . . . . . . . . . . . . . . . .
Balance at December 31, 2015. . . . . . . . . . . . . . . . . .

Other comprehensive income (loss) before
reclassifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Amounts reclassified from accumulated other
comprehensive income (loss) . . . . . . . . . . . . . . . . . . .
Other comprehensive loss . . . . . . . . . . . . . . . . . . . . .
Balance at December 31, 2016. . . . . . . . . . . . . . . . . . $

(127)

—
(127)
83

(180)

—
(180)
(97)

(123)

(538)

78 (1)

(460)
(1,240)

(469)

125 (1)
(344)
(1,584)

(79)

—
(79)
21

(191)

—
(191)
(170)

(744)

78
(666)
(1,136)

(840)

125
(715)
(1,851)

(505)

(384)

(1,012)

—
(123)
(220) $

153 (1)
(352)
(1,936)

$

—
(384)
(554) $

153
(859)
(2,710)

_______________
(1) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic 

pension cost for the years ended December 31, 2016, 2015 and 2014.

Business Combinations

The purchase price of an acquisition is allocated to the underlying assets acquired and liabilities assumed 
based upon their estimated fair values at the date of acquisition. To the extent the purchase price exceeds the fair 
value of the net identifiable tangible and intangible assets acquired and liabilities assumed, such excess is allocated 
to  goodwill.  The  Company  determines  the  estimated  fair  values  after  review  and  consideration  of  relevant 
information,  including  discounted  cash  flows,  quoted  market  prices  and  estimates  made  by  management. The 
Company adjusts the preliminary purchase price allocation, as necessary, during the measurement period of up to 
one year after the acquisition closing date as it obtains more information as to facts and circumstances existing at 
the acquisition date impacting asset valuations and liabilities assumed. Acquisition-related costs are recognized 
separately from the acquisition and are expensed as incurred.

57

 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Goodwill and Intangible Assets

Goodwill and the Company's domain name are evaluated in accordance with ASC 350-10, Goodwill and 
Other Intangible Assets, and an impairment analysis is conducted on an annual basis, or sooner if indicators exist 
for a potential impairment.  

In accordance with ASC 360-10, Accounting for the Impairment or Disposal of Long-Lived Assets, long-
lived assets, such as property and equipment and intangible assets, are reviewed for impairment whenever events 
or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability 
of  assets  to  be  held  and  used  is  measured  by  a  comparison  of  the  carrying  amount  of  an  asset  to  estimated 
undiscounted future cash flows expected to be generated by the asset.  If the carrying amount of an asset exceeds 
its estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount 
of the asset exceeds the fair value of the asset.  

Employee Benefits Plan

The Company sponsors a 401(k) tax-deferred savings plan for all employees in the United States who 
meet certain eligibility requirements.  Participants may contribute up to the amount allowable as a deduction for 
federal income tax purposes.  The Company is not required to contribute; however, the Company contributes a 
certain percentage of employee annual salaries on a discretionary basis, not to exceed an established threshold. In 
each of 2016, 2015 and 2014, the Company provided for a contribution of approximately $1.1 million.

Retirement Benefit Obligations (Pension)

The Company recognizes the over-funded or under-funded status of a defined benefit pension or post-
retirement plan as an asset or liability in the accompanying consolidated balance sheets. Actuarial gains and losses 
are recorded in accumulated other comprehensive loss, a component of stockholders’ equity, and are amortized as 
a component of net periodic cost over the remaining estimated service period of participants.

Revenue Recognition

Product revenues consist of sales to original equipment manufacturers (OEMs), merchant power supply 
manufacturers and distributors. Approximately 75% of the Company’s net product sales were made to distributors 
in 2016. The Company applies the provisions of ASC 605-10, Revenue Recognition, and all related appropriate 
guidance. Revenue is recognized when all of the following criteria have been met: (1) persuasive evidence of an 
arrangement  exists,  (2) delivery  has  occurred,  (3) the  price  is  fixed  or  determinable,  and  (4) collectability  is 
reasonably assured. Customer purchase orders are generally used to determine the existence of an arrangement. 
Delivery is considered to have occurred when title and risk of loss have transferred to the Company’s customer. 
The Company evaluates whether the price is fixed or determinable based on the payment terms associated with 
the transaction and whether the sales price is subject to refund or adjustment. With respect to collectability, the 
Company performs credit checks for new customers and performs ongoing evaluations of its existing customers’ 
financial condition and requires letters of credit whenever deemed necessary. 

Sales to international OEMs and merchant power supply manufacturers for shipments from the Company’s 
facility outside of the United States are pursuant to “EX Works” (EXW) shipping terms, meaning that title to the 
product transfers to the customer upon shipment from the Company’s foreign warehouse. Sales to international 
OEM  customers  and  merchant  power  supply  manufacturers  that  are  shipped  from  the  Company’s  facility  in 
California are pursuant to “delivered at frontier” (DAF) shipping terms. As such, title to the product passes to the 
customer when the shipment reaches the destination country and revenue is recognized upon the arrival of the 
product in that country. Shipments to OEMs and merchant power supply manufacturers in the Americas are pursuant 

58

 
 
 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

to “free on board” (FOB) point of origin shipping terms meaning that title is passed to the customer upon shipment. 
Revenue is recognized upon title transfer for sales to OEMs and merchant power supply manufacturers, assuming 
all other criteria for revenue recognition are met.

Sales to most of the Company's distributors are made under terms allowing certain price adjustments and 
rights of return on the Company's products held by its distributors. As a result of these rights, the Company defers 
the recognition of revenue and the costs of revenues derived from these sales until the Company's distributors 
report that they have sold the Company's products to their customers. The Company's recognition of such distributor 
revenue is based on point of sale reports received from the distributors, at which time the price is no longer subject 
to adjustment and is fixed, and the products are no longer subject to return to the Company except pursuant to 
warranty terms.  The gross profit that is deferred as a result of this policy is reflected as “deferred income on sales 
to distributors” in the accompanying consolidated balance sheets. The total deferred revenue as of December 31, 
2016, and December 31, 2015, was approximately $28.1 million and $25.7 million, respectively.  The total deferred 
cost  as  of  December 31,  2016,  and  December 31,  2015,  was  approximately  $11.9  million  and  $10.6  million, 
respectively.  

Frequently, distributors need to sell at a price lower than the standard distribution price in order to win 
business. At or soon after the distributor invoices its customer, the distributor submits a “ship and debit” price 
adjustment claim to the Company to adjust the distributor's cost from the standard price to the pre-approved lower 
price. After verification by the Company, a credit memo is issued to the distributor for the ship and debit claim. 
The Company maintains a reserve for unprocessed claims and future ship and debit price adjustments.  The reserves 
appear  as  a  reduction  to  accounts  receivable  and  deferred  income  on  sales  to  distributors  in  the  Company's 
accompanying consolidated balance sheets. To the extent future ship and debit claims significantly exceed amounts 
estimated, there could be a material impact on the deferred revenue and deferred margin ultimately recognized.  
To evaluate the adequacy of its reserves, the Company analyzes historical ship and debit payments and levels of 
inventory in the distributor channels. 

Sales to certain distributors of the Company are made under terms that do not include rights of return or 
price concessions after the product is shipped to the distributor.  Accordingly, product revenue is recognized upon 
shipment and title transfer assuming all other revenue recognition criteria are met.

Foreign Currency Risk and Foreign Currency Translation

As of December 31, 2016, the Company’s primary transactional currency was U.S. dollars; in addition, 
the Company holds cash in Swiss francs and euros to fund the operations of the Company’s Swiss subsidiary. The 
foreign exchange rate fluctuation between the U.S. dollar versus the Swiss franc and euro is recorded in “other 
income” in the consolidated statements of income.

Gains and losses arising from the remeasurement of non-functional currency balances are recorded in 
''other income'' in the accompanying consolidated statements of income. For the years ended December 31, 2016, 
2015 and 2014 the Company realized foreign exchange transaction gains (losses) of $(0.1) million, $(0.5) million
and $0.1 million, respectively.

The functional currencies of the Company’s other subsidiaries are the local currencies.  Accordingly, all 
assets and liabilities are translated into U.S. dollars at the current exchange rates as of the applicable balance sheet 
date. Revenues and expenses are translated at the average exchange rate prevailing during the period.  Cumulative 
gains  and  losses  from  the  translation  of  the  foreign  subsidiaries’  financial  statements  have  been  included  in 
stockholders’ equity.

59

 
 
 
 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Warranty 

  The  Company  generally  warrants  that  its  products  will  substantially  conform  to  the  published 
specifications for 12 months from the date of shipment. The Company’s liability is limited to either a credit equal 
to the purchase price or replacement of the defective part.  Returns under warranty have historically been immaterial, 
and as a result, the Company does not record a specific warranty reserve.  

Advertising

Advertising costs are expensed as incurred. Advertising costs amounted to $1.3 million, $1.1 million, and 

$1.5 million, in 2016, 2015 and 2014, respectively.

Research and Development

  Research and development costs are expensed as incurred.

Income Taxes

Income tax expense is an estimate of current income taxes payable or refundable in the current fiscal year 
based on reported income before income taxes. Deferred income taxes reflect the effect of temporary differences 
and carry-forwards that are recognized for financial reporting and income tax purposes.

The Company accounts for income taxes under the provisions of ASC 740, Income Taxes. Under the 
provisions of ASC 740, deferred tax assets and liabilities are recognized based on the differences between the 
financial statement carrying amounts of existing assets and liabilities and their respective tax bases, utilizing the 
tax rates that are expected to apply to taxable income in the years in which those temporary differences are expected 
to be recovered or settled. The Company recognizes valuation allowances to reduce any deferred tax assets to the 
amount that it estimates will more likely than not be realized based on available evidence and management’s 
judgment. The  Company  limits  the  deferred  tax  assets  recognized  related  to  certain  officers’  compensation  to 
amounts that it estimates will be deductible in future periods based upon Internal Revenue Code Section 162(m). 
In the event that the Company determines, based on available evidence and management judgment, that all or part 
of the net deferred tax assets will not be realized in the future, it would record a valuation allowance in the period 
the determination is made. In addition, the calculation of tax liabilities involves significant judgment in estimating 
the impact of uncertainties in the application of complex tax laws. Resolution of these uncertainties in a manner 
inconsistent with the Company’s expectations could have a material impact on the Company’s results of operations 
and financial position.

Common Stock Repurchases and Common Stock Dividend

In 2014 and 2015, the Company’s board of directors authorized the use of $75.0 million and $60.0 million, 
respectively, for repurchase of the Company’s common stock, with repurchases to be executed according to pre-
defined price/volume guidelines. In 2014, the Company purchased 1.6 million shares for approximately $80.8 
million. In 2015, the Company purchased 1.3 million shares for approximately $53.7 million. In 2016, the Company 
purchased 146,000 shares for approximately $6.4 million. As of December 31, 2016, the Company had $23.6 
million available for future stock repurchases. Authorization of future stock repurchase programs is at the discretion 
of  the  board  of  directors  and  will  depend  on  the  Company's  financial  condition,  results  of  operations,  capital 
requirements and business conditions as well as other factors. 

60

 
 
 
 
  
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following table presents the quarterly dividends declared on the Company’s common stock for the 

periods indicated:

Year Ended December 31,

2016

2015

2014

First Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Third Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

0.13

0.13

0.13

0.13

$

$

$

$

0.12

0.12

0.12

0.12

$

$

$

$

0.10

0.10

0.12

0.12

The  Company  paid  a  total  of  approximately  $15.1  million,  $13.9  million  and  $13.2  million  in  cash 

dividends during 2016, 2015 and 2014, respectively.

In January 2017, the Company’s board of directors declared a $0.14 quarterly dividend for each quarter 
in 2017. The declaration of any future cash dividend is at the discretion of the board of directors and will depend 
on the Company’s financial condition, results of operations, capital requirements, business conditions and other 
factors, as well as a determination that cash dividends are in the best interest of the Company’s stockholders.

Indemnifications

The Company sells products to its distributors under contracts, collectively referred to as Distributor Sales 
Agreements (DSA). Each DSA contains the relevant terms of the contractual arrangement with the distributor, and 
generally includes certain provisions for indemnifying the distributor against losses, expenses, and liabilities from 
damages that may be awarded against the distributor in the event the Company’s products are found to infringe 
upon a patent, copyright, trademark, or other proprietary right of a third party (Customer Indemnification). The 
DSA  generally  limits  the  scope  of  and  remedies  for  the  Customer  Indemnification  obligations  in  a  variety  of 
industry-standard respects, including, but not limited to, limitations based on time and geography, and a right to 
replace an infringing product.  The Company also, from time to time, has granted a specific indemnification right 
to individual customers. 

The  Company  believes  its  internal  development  processes  and  other  policies  and  practices  limit  its 
exposure related to such indemnifications. In addition, the Company requires its employees to sign a proprietary 
information and inventions agreement, which assigns the rights to its employees' development work to the Company. 
To date, the Company has not had to reimburse any of its distributors or customers for any losses related to these 
indemnifications and no material claims were outstanding as of December 31, 2016.  For several reasons, including 
the lack of prior indemnification claims and the lack of a monetary liability limit for certain infringement cases, 
the  Company  cannot  determine  the  maximum  amount  of  potential  future  payments,  if  any,  related  to  such 
indemnifications. 

Recently Issued Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update 
("ASU")  2014-09,  Revenue  from  Contracts  with  Customers,  amending  the  existing  accounting  standards  for 
revenue recognition. The amendments are based on the principle that revenue from the transfer of promised goods 
or services to customers should be recognized in an amount that reflects the consideration to which the entity 
expects to be entitled in exchange for those goods or services. The amendments may be applied retrospectively to 
each prior period presented (full retrospective method) or retrospectively with the cumulative effect recognized 
as  of  the  date  of  initial  application  (modified  retrospective  method).  The  Company  is  required  to  adopt  the 
amendments in the first quarter of 2018; early adoption is permitted beginning January 1, 2017. The Company 

61

 
 
 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

will early adopt the new guidance, effective on January 1, 2017, using the full retrospective method under which 
it would recast prior reporting periods. Under the new standards the Company will recognize all revenue on sales 
to distributors upon shipment and transfer of control (known as “sell-in” revenue recognition), rather than deferring 
recognition until distributors report that they have sold the products to their customers (known as “sell-through” 
revenue recognition). Currently, a high percentage of the Company’s revenues on sales to distributors are recognized 
on sell-through. Because this change in methodology will cause a shift in the timing of when revenue is recognized, 
the Company expects that the quarterly seasonal pattern of its revenues will be affected by the new standards. 
Based on the Company’s analysis, under the new standards annual net revenues would increase by approximately 
$2 million and $1 million in 2016 and 2015, respectively.

In July 2015, the FASB amended the existing accounting standards for the measurement of inventory, 
ASU 2015-11, Inventory. The amendments require inventory to be measured at the lower of cost and net realizable 
value.  Net  realizable  value  is  the  estimated  selling  prices  in  the  ordinary  course  of  business,  less  reasonably 
predictable costs of completion, disposal, and transportation. The Company is required to adopt the amendments 
in the first quarter of 2017. The amendments should be applied prospectively with early adoption permitted as of 
the beginning of an interim or annual reporting period. The Company does not expect that the adoption of these 
amendments will have a material impact on its consolidated financial statements.

In February 2016, the FASB amended the existing accounting standards for leases, ASU 2016-02, Leases. 
The amendments require lessees to recognize, on the balance sheet, assets and liabilities for the rights and obligations 
created by leases of greater than twelve months. The accounting by lessors will remain largely unchanged from 
that applied under previous U.S. GAAP. The Company is required to adopt the amendments in the first quarter of 
fiscal 2019, with early adoption permitted. The amendments require a modified retrospective transition approach 
to  recognize  and  measure  leases  at  the  beginning  of  the  earliest  period  presented. The  Company  is  currently 
evaluating the impact of these amendments and the transition alternatives on its consolidated financial statements.

In March 2016, the FASB amended the existing accounting standards for stock-based compensation, ASU 
2016-09,  Compensation-Stock  Compensation  (Topic  718):  Improvements  to  Employee  Share-Based  Payment 
Accounting. The amendments impact several aspects of accounting for share-based payment transactions, including 
the income tax consequences, forfeitures, classification of awards as either equity or liabilities, and classification 
on the statement of cash flows. The Company is required to adopt the amendments in the first quarter of 2017. The 
manner  of  application  varies  by  the  various  provisions  of  the  guidance,  with  certain  provisions  applied  on  a 
retrospective  or  modified  retrospective  approach,  while  others  are  applied  prospectively.  Upon  adoption,  the 
Company expects to recognize a windfall tax benefit of approximately $7 million to $8 million, as a cumulative 
effect adjustment to opening retained earnings, together with a corresponding increase in deferred tax assets.

3. STOCK PLANS AND SHARE BASED COMPENSATION:

Stock Plans

  As of December 31, 2016, the Company had three stock-based compensation plans (the “Plans”) which 

are described below.

2007 Equity Incentive Plan

The 2007 Equity Incentive Plan (2007 Plan) was adopted by the board of directors on September 10, 
2007, and approved by the stockholders on November 7, 2007, as an amendment and restatement of the 1997 Stock 
Option Plan (1997 Plan). The 2007 Plan provides for the grant of incentive stock options, non-statutory stock 
options, restricted stock awards, restricted stock unit (RSU) awards, stock appreciation rights, performance-based 
(PSU) awards, long-term performance based (PRSU) awards and other stock awards to employees, directors and 

62

 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

consultants.  As of December 31, 2016, the total maximum remaining number of shares that may be issued under 
the 2007 Plan was 3.8 million shares, which includes 0.6 million options issued but not exercised and 1.9 million
awards granted but unvested. As of December 31, 2016, 1.9 million shares of common stock remain available for 
future grant under the 2007 Plan. Pursuant to the 2007 Plan, the exercise price for incentive stock options and non-
statutory stock options is generally at least 100% of the fair market value of the underlying shares on the date of 
grant. Options generally vest over 48 months measured from the date of grant. Options generally expire no later 
than ten years after the date of grant, subject to earlier termination upon an optionee’s cessation of employment 
or service.  

Beginning January 27, 2009, grants pursuant to the Directors Equity Compensation Program (which was 
adopted by the board of directors on January 27, 2009) to non-employee directors have been made primarily under 
the 2007 Plan. The Directors Equity Compensation Program provides for grants to outside directors as follows: 
effective annually, upon the first trading day of July, each outside director would receive a grant of an equity award 
with an aggregate value of $100,000.  At each outside director’s election, such award would consist entirely of 
RSUs or entirely of stock options. The quantity of options would be calculated by dividing $100,000 by the Black-
Scholes value on the date of grant.  The quantity of RSUs issued would be calculated by dividing $100,000 by the 
grant date fair value.  Further, on the date of election of a new outside director, such new director would receive 
such grant as continuing outside directors receive on the first trading day of July; provided, however, that such 
grant is prorated for the portion of the year that such new outside director will serve until the next first trading day 
of July. The Directors Equity Compensation Program will remain in effect at the discretion of the board of directors 
or the compensation committee.

On  July  28,  2009,  the  2007  Plan  was  amended  generally  to  prohibit  outstanding  options  or  stock 

appreciation rights from being canceled in exchange for cash without stockholder approval.

2016 Incentive Award Plan

The 2016 Incentive Award Plan (2016 Plan) was adopted by the board of directors on March 17, 2016 
and approved by the stockholders on May 13, 2016. The Plan provides for the grant of RSU awards, PSU awards 
and PRSU awards. No other forms of equity-based awards, including stock options and stock appreciation rights, 
may be granted under the Plan. As of December 31, 2016, no awards have been issued and 1.5 million shares of 
common stock remain available for future grant under the 2016 Plan. The 2016 Plan also provides for performance-
based cash awards that qualify as “performance-based compensation” within the meaning of Section 162(m) of 
the Internal Revenue Code.

1997 Employee Stock Purchase Plan

Under  the  1997  Employee  Stock  Purchase  Plan  (Purchase  Plan),  eligible  employees  may  apply 
accumulated payroll deductions, which may not exceed 15% of an employee’s compensation, to the purchase of 
shares of the Company’s common stock at periodic intervals. The purchase price of stock under the Purchase Plan 
is equal to 85% of the lower of (i) the fair market value of the Company’s common stock on the first day of each 
offering period, or (ii) the fair market value of the Company’s common stock on the purchase date (as defined in 
the Purchase Plan). Each offering period consists of one purchase period of approximately six months duration.  
An aggregate of 3.5 million shares of common stock were reserved for issuance to employees under the Purchase 
Plan. As of December 31, 2016, of the shares reserved for issuance, 2.9 million shares had been purchased and 0.6 
million shares were reserved for future issuance under the Purchase Plan.

Shares Reserved

As of December 31, 2016, the Company had approximately 3.4 million shares of common stock reserved 

for future grant under all stock plans.

63

 
 
 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Stock-Based Compensation

The Company applies the provisions of ASC 718-10, Stock Compensation. Under the provisions of ASC 
718-10, the Company recognizes the fair value of stock-based compensation in its financial statements over the 
requisite service period of the individual grants, which generally equals a four-year vesting period. The Company 
uses estimates of volatility, expected term, risk-free interest rate, dividend yield and forfeitures in determining the 
fair value of these awards and the amount of compensation expense to recognize. The Company uses the straight-
line method to amortize all stock awards granted over the requisite service period of the award.

 The following table summarizes the stock-based compensation expense recognized in accordance with 

ASC 718-10 for the years ended December 31, 2016, 2015 and 2014:

(in thousands)
Cost of revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Research and development. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sales and marketing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General and administrative. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total stock-based compensation expense. . . . . . . . . . . . . . . . . . $

Year Ended December 31,
2015

2014

2016

1,148
7,309
4,489
7,939
20,885

$

$

933
5,255
3,644
4,935
14,767

$

$

879
4,784
3,540
5,079
14,282

The following table summarizes total compensation expense related to unvested awards not yet recognized, 
net of expected forfeitures, and the weighted average period over which it is expected to be recognized as of 
December 31, 2016:

Unrecognized Compensation
Expense for Unvested
Awards
(in thousands)

Long-term performance-based awards. . . . . . . . . . . $
Restricted stock units . . . . . . . . . . . . . . . . . . . . . . . .
Purchase plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total unrecognized compensation expense . . . . . . . $

2,562
21,930
120
24,612

Weighted Average
Remaining Recognition
Period
(in years)
1.52
2.27
0.08

Stock-based  compensation  expense  in  the  year  ended  December 31,  2016,  was  approximately  $20.9 
million (comprising approximately $0.2 million related to stock options, $6.4 million related to performance-based 
awards, $13.0 million related to restricted stock units and $1.3 million related to the Company’s Purchase Plan).  

Stock-based  compensation  expense  in  the  year  ended  December 31,  2015,  was  approximately  $14.8 
million (comprising approximately $0.7 million related to stock options, $0.3 million related to performance-based 
awards, $12.7 million related to restricted stock units and $1.2 million related to the Company’s Purchase Plan).  

Stock-based  compensation  expense  in  the  year  ended  December 31,  2014,  was  approximately  $14.3 
million  (comprising  approximately  $1.2  million  related  to  stock  options,  $0.5  million  related  to  long-term 
performance-based awards, $11.3 million related to restricted stock units and $1.3 million related to the Company’s 
Purchase Plan).

The Company did not grant stock options in the years ended December 31, 2016, 2015 and 2014, and 

therefore no fair-value assumptions are reported.

64

 
 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

  The fair value of employees’ stock purchase rights under the Purchase Plan was estimated using the Black-
Scholes model with the following weighted-average assumptions used during the three years ended December 31, 
2016, 2015 and 2014:

Risk-free interest rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Expected volatility rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Expected dividend yield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Expected term of purchase right (in years) . . . . . . . . . . . . . . . .

Weighted-average estimated fair value of purchase rights. . . . .

Year Ended December 31,

2016

0.44%

32%

0.96%

0.5

$12.23

2015

0.13%

29%

1.08%

0.5

$10.18

2014

0.05% - 0.07%

30% - 48%

0.66% - 0.85%

0.5

$14.40

A summary of stock option activity under the Plans as of December 31, 2016, and activity during three 

years then ended, is presented below:

 (shares and intrinsic value in thousands)
Outstanding at January 1, 2014 . . . . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited or expired . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at December 31, 2014 . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited or expired . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at December 31, 2015 . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited or expired . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at December 31, 2016 . . . . . . . . . . . . . . . .
Exercisable at December 31, 2016 . . . . . . . . . . . . . . . .
Vested and expected to vest at December 31, 2016. . . .

Weighted
Average
Exercise
Price

Weighted Average
Remaining 
Contractual
Term
(in years)

Aggregate
Intrinsic
Value

Shares

$

$

1,691
—
(347) $
—
1,344
—
(311) $
(3) $
$

1,030
—
(333) $
—
697
697
697

$
$
$

27.34
—
27.64
—
27.27
—
26.11
37.97
27.58
—
25.41
—
28.62
28.62
28.62

2.82
2.82
2.82

$
$
$

27,370
27,370
27,370

The total intrinsic value of options exercised during the year ended December 31, 2016, 2015 and 2014, 

was $11.5 million, $7.0 million and $9.9 million, respectively. 

  The following table summarizes the stock options outstanding at December 31, 2016: 

(shares in thousands)

Range of Exercise Prices

$17.75 - $25.25 . . . . . . . . . . . . .

$25.48 - $42.88 . . . . . . . . . . . . .

Options Outstanding

Options Exercisable

Options
Outstanding

Weighted Average
Remaining 
Contractual Term 
(in years)

Weighted
Average
Exercise
Price

Options
Exercisable

Weighted
Average
Exercise
Price

371

326

697

2.15

3.58

2.82

65

$

$

$

21.31

36.94

28.62

371

326

697

$

$

$

21.31

36.94

28.62

 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

PSU Awards

Under the performance-based awards program, the Company grants awards in the performance year in 
an amount equal to twice the target number of shares to be issued if the maximum performance metrics are met. 
The number of shares that are released at the end of the performance year can range from zero to 200% of the 
target number depending on the Company’s performance. The performance metrics of this program are annual 
targets  consisting  of  a  combination  of  net  revenue,  non-GAAP  operating  earnings  and  strategic  goals.  Each 
performance-based award share granted from the 2007 Plan will reduce the number of shares available for issuance 
under the 2007 Plan by two shares. Each performance-based award share granted from the 2016 Plan will reduce 
the number of shares available for issuance under the 2016 Plan by one share.

During  the  year  ended  December 31,  2016,  the  Company  issued  approximately  101,000  PSUs  to 
employees and executives. As the net revenue, non-GAAP operating income and strategic goals are considered 
performance conditions, expense associated with these awards, net of estimated forfeitures, is recognized over the 
service period based on an assessment of the achievement of the performance targets. The fair value of these PSUs 
is determined using the fair value of the Company’s common stock on the date of the grant, reduced by the discounted 
present value of dividends expected to be declared before the awards vest. If the performance conditions are not 
achieved, no compensation cost is recognized and any previously recognized compensation is reversed. 

A summary of PSU awards outstanding as of December 31, 2016, and activity during the three years then 

ended is presented below:

(shares and intrinsic value in thousands)
Outstanding at January 1, 2014. . . . . . . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited or canceled . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at December 31, 2014. . . . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited or canceled . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Outstanding at December 31, 2015. . . . . . . . . . . . . . . . . . .

Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Forfeited or canceled . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Outstanding at December 31, 2016. . . . . . . . . . . . . . . . . . .

Outstanding and expected to vest at December 31, 2016 . .

Weighted Average
Grant Date Fair
Value Per Share
Shares
38.48
$
100
53.93
83
$
38.48
(83) $
51.30
(100) $
—
—
52.36
89
—
—
52.35
(78) $

$

11

101

$

$

(11) $

(2) $

$

99

99

52.35

46.26

52.35

46.87

46.25

Weighted 
Average 
Remaining 
Contractual 
Term
(in years)

Aggregate 
Intrinsic
Value

0

0

$

$

6,714

6,714

The grant date fair value of PSU awards released, which were fully vested, in the year ended December 31, 
2016 was approximately $0.6 million. There were no PSU awards released in the year ended December 31, 2015 
(as the Company did not reach its minimum performance goals established for the 2014 PSUs). The grant date fair 
value of PSU awards released, which were fully vested, in the year ended December 31, 2014 was approximately 
$3.2 million.

66

 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

PRSU Awards (Long-term Performance Based)

The  Company's  PRSU  program  provides  for  the  issuance  of  PRSUs  which  will  vest  based  on  the 
Company's performance measured against the PRSU Plan's established revenue targets. The PRSUs were granted 
in an amount equal to twice the target number of shares to be issued if the maximum performance metrics are met. 
The actual number of shares the recipient receives is determined at the end of a three-year performance period 
based on results achieved versus the Company’s performance goals, and may range from zero to 200% of the target 
number. The performance goals for PRSUs granted in fiscal 2016, 2015 and 2014 were based on the Company’s 
annual revenue growth over the respective three-year performance period. Each PRSU granted from the 2007 Plan 
will reduce the number of shares available for issuance under the 2007 Plan by two shares. Each PRSU granted 
from the 2016 Plan will reduce the number of shares available for issuance under the 2016 Plan by one share.

Recipients of a PRSU award generally must remain employed by the Company on a continuous basis 
through the end of the applicable three-year performance period in order to receive shares subject to that award. 
Expenses associated with these awards, net of estimated forfeitures, are recorded throughout the year depending 
on the number of shares expected to vest based on progress toward the performance target. The fair value of PRSU 
awards is determined using the fair value of the Company’s common stock on the grant date, reduced by the 
discounted present value of dividends expected to be declared before the awards vest. If the performance conditions 
are not achieved, no compensation cost is recognized and any previously recognized compensation is reversed.

A summary of PRSU awards outstanding as of December 31, 2016, and activity during the three years 

then ended is presented below:

Weighted 
Average 
Remaining 
Contractual 
Term
(in years)

Aggregate
Intrinsic
Value

(shares and intrinsic value in thousands)
Outstanding at January 1, 2014. . . . . . . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited or canceled . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at December 31, 2014. . . . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited or canceled . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Weighted Average
Grant Date Fair
Value Per Share
—
55.51
—
—
55.51
52.47
—
57.76

$

Shares
—
61
—
—
61
72
—
(4) $

$
$

Outstanding at December 31, 2015. . . . . . . . . . . . . . . . . . .

Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

$

129

78

—

Forfeited or canceled . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(57) $

Outstanding at December 31, 2016. . . . . . . . . . . . . . . . . . .

Outstanding and expected to vest at December 31, 2016 . .

$

150

113

53.75

43.26

—

55.35

47.65

1.52

1.51

$

$

10,177

7,659

RSU Awards

The Company grants restricted stock units to employees under the 2007 Plan and 2016 Plan. RSUs granted 
to employees typically vest ratably over a four-year period, and are converted into shares of the Company’s common 
stock upon vesting on a one-for-one basis subject to the employee’s continued service to the Company over that 
period. The fair value of RSUs is determined using the fair value of the Company’s common stock on the date of 

67

 
         
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

the grant, reduced by the discounted present value of dividends expected to be declared before the awards vest. 
Compensation expense is recognized on a straight-line basis over the requisite service period of each grant adjusted 
for estimated forfeitures. Each RSU award granted from the 2007 Plan will reduce the number of shares available 
for issuance under the 2007 Plan by two shares. Each RSU award granted from the 2016 Plan will reduce the 
number of shares available for issuance under the 2016 Plan by one share.

  A summary of RSUs outstanding as of December 31, 2016, and activity during the three years then ended, 

is as follows:

(shares and intrinsic value in thousands)
Outstanding at January 1, 2014. . . . . . . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at December 31, 2014. . . . . . . . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at December 31, 2015. . . . . . . . . . . . . . . . . . .

Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Outstanding at December 31, 2016. . . . . . . . . . . . . . . . . . .

Outstanding and expected to vest at December 31, 2016 . .

Weighted Average
Grant Date Fair
Value Per Share
Shares
38.97
$
714
51.12
281
$
38.57
(267) $
42.74
(36) $
43.86
$
692
49.75
319
$
42.49
(267) $
45.71
(63) $
46.98
$
681

331

$

(270) $

(24) $

$

718

674

46.70

45.13

47.21

47.54

Weighted 
Average 
Remaining 
Contractual 
Term
(in years)

Aggregate
Intrinsic
Value

1.25

1.19

$

$

48,684

45,711

The grant date fair value of RSUs vested in the years ended December 31, 2016, 2015 and 2014, was 

approximately $12.2 million, $11.3 million and $10.3 million, respectively.    

4. FAIR VALUE MEASUREMENTS:

ASC 820-10, Fair Value Measurements, clarifies that fair value is an exit price, representing the amount 
that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market 
participants. As such, fair value is a market-based measurement that should be determined based on assumptions 
that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, 
ASC 820-10 establishes a three-tier value hierarchy, which prioritizes the inputs used in measuring fair value as 
follows: (Level 1) observable inputs such as quoted prices for identical assets in active markets; (Level 2) inputs 
other  than  the  quoted  prices  in  active  markets  that  are  observable  either  directly  or  indirectly;  and  (Level  3) 
unobservable inputs in which there is little or no market data, which requires the Company to develop its own 
assumptions. This hierarchy requires the Company to use observable market data, when available, and to minimize 
the use of unobservable inputs when determining fair value. 

The Company's cash equivalents and investment instruments are classified within Level 1 or Level 2 of 
the  fair-value  hierarchy  because  they  are  valued  using  quoted  market  prices,  broker  or  dealer  quotations,  or 
alternative pricing sources with reasonable levels of price transparency. The type of instrument valued based on 
quoted market prices in active markets primarily includes money market securities. This type of instrument is 

68

 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

generally classified within Level 1 of the fair-value hierarchy. The types of instruments valued based on other 
observable inputs (Level 2 of the fair-value hierarchy) include investment-grade corporate bonds and government, 
state, municipal and provincial obligations. Such types of investments are valued by using a multi-dimensional 
relational model, the inputs are primarily benchmark yields, reported trades, broker/dealer quotes, issuer spreads, 
two-sided markets, benchmark securities, bids, offers, and reference data including market research publications. 
The Company does not hold any instruments that would be classified within Level 3 of the fair-value hierarchy.

The fair value hierarchy of the Company’s cash equivalents and marketable securities at December 31, 

2016, and December 31, 2015, was as follows:

(in thousands)
Commercial paper . . . . . . . . . . . . . . . . . . . . . . . . . $
Money market funds. . . . . . . . . . . . . . . . . . . . . . . .
Corporate securities . . . . . . . . . . . . . . . . . . . . . . . .
     Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

(in thousands)
Commercial paper . . . . . . . . . . . . . . . . . . . . . . . . . $
Money market funds. . . . . . . . . . . . . . . . . . . . . . . .
Corporate securities . . . . . . . . . . . . . . . . . . . . . . . .
     Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Fair Value Measurement at
December 31, 2016
Quoted Prices in
Active Markets for
Identical Assets
(Level 1)

Significant Other 
Observable Inputs
(Level 2)

Total Fair Value

58,031
1,916
132,141
192,088

$

$

— $

1,916
—
1,916

$

58,031
—
132,141
190,172

Fair Value Measurement at
December 31, 2015
Quoted Prices in
Active Markets for
Identical Assets
(Level 1)

Significant Other 
Observable Inputs
(Level 2)

Total Fair Value

21,194
104
83,769
105,067

$

$

— $

104
—
104

$

21,194
—
83,769
104,963

The Company did not transfer any investments between level 1 and level 2 of the fair value hierarchy in 

the years ended December 31, 2016, and December 31, 2015.

5. GOODWILL AND INTANGIBLE ASSETS:

Goodwill  increased  during  the  year  ended  December  31,  2015,  due  to  the  Company's  acquisition  of 
Cambridge  Semiconductor  Limited  (CamSemi)  (refer  to  Note  11,  Acquisitions,  for  details  on  the  Company’s 
CamSemi acquisition). Changes in the carrying amount of goodwill during the years ended December 31, 2016 
and 2015, are as follows:

(in thousands)
Balance at December 31, 2014. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Goodwill acquired during the period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Balance at December 31, 2015. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Goodwill acquired during the period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Balance at December 31, 2016. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Goodwill

80,599
11,250
91,849
—
91,849

 Intangible assets consist primarily of developed technology, acquired licenses, customer relationships, 
trade name, domain name, in-process R&D and patent rights, and are reported net of accumulated amortization. 

69

 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

In January 2015, the Company acquired CamSemi, resulting in the addition of the following intangible assets: 
developed technology of $6.6 million, which will be amortized over a period of three - seven years; and customer 
relationships of $2.4 million, which will be amortized over a period of five years. In August 2015, the Company 
purchased a building with existing third-party leases, resulting in the addition of in-place lease intangible assets 
of $0.7 million which will be amortized over a period of two years.

The Company amortizes the cost of all intangible assets over the shorter of the estimated useful life or 
the term of the developed technology, acquired licenses, customer relationships, trade name, patent rights and in-
place leases, which range from two to twelve years, with the exception of $4.7 million of in-process R&D and 
$1.3  million  paid  to  acquire  an  internet  domain  name.  In-process  R&D  is  assessed  for  impairment  until  the 
development is completed and products are available for sale, at which time the Company will begin to amortize 
the in-process R&D. The Company does not expect the amortization of in-process R&D to begin in 2017. The 
Company acquired the rights to the internet domain name www.power.com, which is now the Company’s primary 
domain name; the cost to acquire the domain name has been recorded as an intangible asset and will not be amortized 
as it has an indefinite useful life.  Amortization of acquired intangible assets was approximately $6.7 million, $7.0 
million and $6.1 million in the years ended December 31, 2016, 2015 and 2014, respectively. The Company does 
not believe there is any significant residual value associated with the following intangible assets:

December 31, 2016
Accumulated
Amortization
$

December 31, 2015
Accumulated
Amortization
$

Gross

(in thousands)
1,261
Domain name . . . . . . . . . . . . . . . . . . . . . $
4,690
In-process research and development . .
3,000
Technology licenses. . . . . . . . . . . . . . . .
33,270
Developed technology . . . . . . . . . . . . . .
20,030
Customer relationships. . . . . . . . . . . . . .
660
In-place leases . . . . . . . . . . . . . . . . . . . .
Total intangible assets . . . . . . . . . . . . . . $ 62,911

Net
1,261
4,690
—
17,815
7,556
180
(31,409) $ 31,502

— $
—
(3,000)
(15,455)
(12,474)
(480)

Gross

$

1,261
4,690
3,000
33,270
20,030
660
$ 62,911

$

$

Net
1,261
4,690
75
21,600
9,999
540
(24,746) $ 38,165

— $
—
(2,925)
(11,670)
(10,031)
(120)

  The estimated future amortization expense related to definite-lived intangible assets at December 31, 

2016, is as follows:

Fiscal Year
2017 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Estimated
Amortization
(in thousands)

6,084
5,152
4,753
3,528
2,662
3,372
25,551

_______________
(1)   The total above excludes $4.7 million of in-process R&D which will be amortized upon completion 

of development over the estimated useful life of the technology.

70

 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

6. SIGNIFICANT CUSTOMERS AND INTERNATIONAL SALES:

Segment Reporting

The Company is organized and operates as one reportable segment, the design, development, manufacture 
and marketing of analog and mixed-signal ICs and other electronic components and circuitry used in high-voltage 
power conversion. The Company’s chief operating decision maker, the chief executive officer, reviews financial 
information presented on a consolidated basis for purposes of making operating decisions and assessing financial 
performance.

Customer Concentration

The Company's top ten customers accounted for approximately 60% of net revenues in each of 2016 and 
2015, and 59% in 2014. A significant portion of these revenues are attributable to sales of the Company’s products 
to distributors of electronic components. These distributors sell the Company’s products to a broad, diverse range 
of end users, including OEMs and merchant power supply manufacturers.

The following customers each accounted for 10% or more of total net revenues:

Customer
Avnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powertech Distribution Ltd. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,
2015

2014

2016

18%
11%

21%
10%

19%
*

_______________
* Total customer revenue was less than 10% of net revenues

Avnet and Powertech Distribution Ltd. are distributors of the Company's products. No other customers 

accounted for 10% or more of the Company’s net revenues in those periods.  

Concentration of Credit Risk

Financial  instruments  that  potentially  subject  the  Company  to  concentrations  of  credit  risk  consisted 
principally of cash investments and trade receivables.  The Company has cash investment policies that limit cash 
investments to low-risk investments. With respect to trade receivables, the Company performs ongoing evaluations 
of its customers' financial conditions and requires letters of credit whenever deemed necessary.  Additionally, the 
Company establishes an allowance for doubtful accounts based upon factors surrounding the credit risk of specific 
customers, historical trends related to past write-offs and other relevant information.  Account balances are charged 
off  against  the  allowance  after  all  means  of  collection  have  been  exhausted  and  the  potential  for  recovery  is 
considered remote. The Company does not have any off-balance-sheet credit exposure related to its customers. 
Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of 
cash  investments  and  trade  receivables. As  of  December 31,  2016  and  December 31,  2015,  70%  and  66%  of 
accounts receivable were concentrated with the Company’s top 10 customers.

The following customers each represented 10% or more of accounts receivable: 

Customer
Avnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ATM Electronic Corporation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

December 31,
2016

December 31,
2015

24%
*

20%
10%

_______________
* Total customer accounts receivable was less than 10%

71

 
 
 
 
 
 
 
  
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Avnet and ATM Electronic Corporation are distributors of the Company’s products. No other customers 

accounted for 10% or more of the Company’s accounts receivable in these periods.

International Sales

The  Company  markets  its  products  globally  through  its  sales  personnel  and  a  worldwide  network  of 
independent sales representatives and distributors. As a percentage of total net revenues, international sales, which 
consist of sales to distributors and direct customers outside of the United States of America, based on "bill to" 
customer locations, comprise the following:

Year Ended December 31,
2015

2014

2016

Hong Kong/China. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taiwan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Korea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Western Europe (excluding Germany). . . . . . . . . . . . . . . . . . . .
Japan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Germany . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total foreign revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

51%
13%
11%
11%
5%
2%
3%
96%

50%
14%
10%
11%
5%
2%
3%
95%

47%
15%
11%
11%
5%
2%
4%
95%

The remainder of the Company’s sales is to customers within the United States of America.

7. EARNINGS PER SHARE:

Basic earnings per share are calculated by dividing net income by the weighted-average shares of common 
stock  outstanding  during  the  period.  Diluted  earnings  per  share  are  calculated  by  dividing  net  income  by  the 
weighted-average shares of common stock and dilutive common equivalent shares outstanding during the period. 
Dilutive common equivalent shares included in this calculation consist of dilutive shares issuable upon the assumed 
exercise  of  outstanding  common  stock  options,  the  assumed  vesting  of  outstanding  restricted  stock  units,  the 
assumed issuance of awards under the stock purchase plan and contingently issuable performance-based awards, 
as computed using the treasury stock method. 

  A summary of the earnings per share calculation is as follows:

 (in thousands, except per share amounts)
Basic earnings per share:

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Weighted-average common shares . . . . . . . . . . . . . . . . .
Basic earnings per share . . . . . . . . . . . . . . . . . . . . . . . . . $

Diluted earnings per share (1):

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Weighted-average common shares . . . . . . . . . . . . . . . . .
Effect of dilutive securities:

Employee stock plans . . . . . . . . . . . . . . . . . . . . . . .
Diluted weighted-average common shares . . . . . . . . . . .
Diluted earnings per share. . . . . . . . . . . . . . . . . . . . . . . . $

Year Ended December 31,
2015

2014

2016

47,890
28,925
1.66

47,890
28,925

694
29,619
1.62

$

$

$

$

39,147
29,001
1.35

39,147
29,001

695
29,696
1.32

$

$

$

$

59,544
29,976
1.99

59,544
29,976

853
30,829
1.93

72

 
 
 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

_______________ 

(1)  The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per 
share if the performance conditions have been satisfied as of the end of the reporting period and excludes such 
shares when the necessary conditions have not been met. The Company has excluded all performance-based 
awards in the 2014 calculation as the performance conditions for those awards were not met as of the end of the 
period. The Company has included in the 2016 and 2015 calculations those shares that were contingently issuable 
upon the satisfaction of the performance conditions as of the end of the respective periods. 

In the year ended December 31, 2016 no outstanding stock awards were determined to be anti-dilutive 
and therefore were excluded from the computation of diluted earnings per share. In the years ended December 31, 
2015 and 2014, approximately 8,000 and 37,000 outstanding stock awards were determined to be anti-dilutive, 
respectively, and therefore were excluded from the computation of diluted earnings per share.

8. PROVISION FOR INCOME TAXES:

Income Taxes

The Company accounts for income taxes under the provisions of ASC 740, Income Taxes. Under the 
provisions of ASC 740, deferred tax assets and liabilities are recognized based on the differences between the 
financial statement carrying amounts of existing assets and liabilities and their respective tax bases, utilizing the 
tax rates that are expected to apply to taxable income in the years in which those temporary differences are expected 
to be recovered or settled. 

  U.S. and foreign components of income before income taxes were:

(in thousands)

Year Ended December 31,

2016

2015

2014

U.S. operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

(880) $

(2,113) $

Foreign operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

49,802

41,531

Total pretax income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

48,922

$

39,418

$

(5,064)

61,878

56,814

  The components of the provision for (benefit from) income taxes are as follows:

(in thousands)
Current provision (benefit):

Federal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Deferred provision (benefit):

Federal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Year Ended December 31,
2015

2014

2016

— $
—
1,638
1,638

(197)
(27)
(382)
(606)
1,032

$

443
83
5,407
5,933

(1,699)
(57)
(3,906)
(5,662)
271

$

$

(1,234)
(137)
3,094
1,723

(3,279)
(284)
(890)
(4,453)
(2,730)

73

 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

  The Company is entitled to a deduction for federal and state tax purposes with respect to employees' stock 
option activity. The net reduction in taxes otherwise payable in excess of any amount credited to income tax expense 
has been reflected as an adjustment to additional paid-in capital. For 2015 and 2014, the benefit (deficiency) arising 
from employee stock option activity that resulted in an adjustment to additional paid in capital was approximately 
$(0.2) million and $0.8 million, respectively. No adjustment was recorded in 2016.

  The provision for (benefit from) income taxes differs from the amount that would result by applying the 

applicable federal income tax rate to income before provision for (benefit from) income taxes, as follows: 

Year Ended December 31,

2016

2015

2014

Provision computed at Federal statutory rate . . . . . . . . . . . . . . .
Business tax credits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stock-based compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign income taxed at different rate . . . . . . . . . . . . . . . . . . . .
IRS audit settlement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valuation allowance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

35.0%
(6.0)
2.2
(33.1)
—
1.8
2.2
2.1%

35.0%
(6.8)
0.8
(33.1)
—
2.6
2.2
0.7%

35.0 %
(5.5)
(2.9)
(28.6)
(5.8)
2.0
1.0
(4.8)%

The effective tax rate for the year ended December 31, 2016 was favorably impacted by the geographic 
distribution of the Company’s world-wide earnings in lower-tax jurisdictions. Additionally, the rate was favorably 
impacted by the federal R&D tax credit which was extended permanently when the Protecting Americans from 
Tax Hikes Act was signed into law on December 18, 2015.

The Company reached a settlement with the IRS in the quarter ended June 30, 2014, to close out the 
examination of its federal income tax returns for the years 2007 through 2009. As a result, the Company adjusted 
its tax balances and the provision for income tax for the year ended December 31, 2014, includes a one-time benefit 
of $3.3 million comprising $2.8 million in federal income taxes and interest, and state income taxes of approximately 
$0.5 million. The one-time benefit includes the reversal of $4.1 million of related unrecognized tax benefits that 
had been recorded as non-current liabilities in the Company’s consolidated balance sheets. The Company has now 
concluded all U.S. federal income tax matters for the years through 2009.

74

 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The components of the net deferred income tax asset (liabilities) were as follows: 

(in thousands)
Deferred tax assets:
Other reserves and accruals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Tax credit carry-forwards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stock compensation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capital losses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net operating loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valuation allowance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Deferred tax liabilities:
Depreciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unremitted earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net deferred tax asset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

December 31,

2016

2015

$

1,880
26,895
5,760
10,585
2,671

174
(27,489)
20,476

(2,322)
(7,019)
—
(9,341)
11,135

$

1,573
22,826
5,945
11,490
3,677

—
(26,918)
18,593

(2,968)
(4,626)
(447)
(8,041)
10,552

In assessing the realizability of deferred tax assets, management considers whether it is more likely than 
not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax 
assets is dependent upon the generation of future taxable income during the periods in which those temporary 
differences  become  deductible.  Management  considers  the  scheduled  reversal  of  deferred  tax  liabilities  and 
projected  future  taxable  income.  In  the  event  that  the  Company  determines,  based  on  available  evidence  and 
management judgment, that all or part of the net deferred tax assets will not be realized in the future, the Company 
would record a valuation allowance in the period the determination is made. In addition, the calculation of tax 
liabilities involves significant judgment in estimating the impact of uncertainties in the application of complex tax 
laws. Resolution of these uncertainties in a manner inconsistent with the Company’s expectations could have a 
material impact on its results of operations and financial position.

As of December 31, 2016, the Company continues to maintain a valuation allowance primarily as a result 
of capital losses for federal purposes, and on its California deferred tax assets as the Company believes that it is 
not more likely than not that the deferred tax assets will be fully realized. In addition, the Company maintains a 
valuation allowance with respect to certain of its deferred tax assets relating to tax credits in Canada and the state 
of New Jersey. 

As of December 31, 2016, the Company had federal research and development tax credit carry-forwards 
of approximately $14.9 million, which will begin to expire in 2030 if unutilized; federal net operating losses of 
$31.3 million, which will begin to expire in 2024 if unutilized; California research and development tax credit 
carry-forwards of approximately $18.7 million (there is no expiration of research and development tax credit carry-
forwards for the state of California) and California net operating losses of $45.5 million which will begin to expire 
in 2032. As of December 31, 2016, the Company had Canadian scientific research and experimental development 
tax credit carry-forwards of approximately $2.1 million and New Jersey research and experimental development 
tax credit carry-forwards of approximately $0.7 million, which will start to expire in 2026 and 2027, respectively.

  The Company does not provide for U.S. taxes on its undistributed earnings of foreign subsidiaries that it 
intends to invest indefinitely outside the U.S., unless such taxes are otherwise required under U.S. tax law. Beginning 
in 2013, the Company determined that a portion of its foreign subsidiaries current and future earnings may be 
75

 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

remitted prospectively to the U.S. for domestic cash flow purposes and, accordingly, provided for the related U.S. 
taxes in its consolidated financial statements. If the Company changes its intent to invest its undistributed foreign 
earnings indefinitely or if a greater amount of undistributed earnings are needed for U.S. operations than previously 
anticipated and for which U.S. taxes have not been recorded, the Company would be required to accrue or pay 
U.S. taxes (subject to an adjustment for foreign tax credits, where applicable) and withholding taxes payable to 
various foreign countries on some or all of these undistributed earnings. As of December 31, 2016, the Company 
had undistributed earnings of foreign subsidiaries that are indefinitely invested outside of the U.S. of approximately 
$265.0 million. It is not practicable to determine the income tax liability that might be incurred if these earnings 
were to be distributed.

Unrecognized Tax Benefits

  The Company applies the provisions of ASC 740-10, relating to accounting for uncertain income taxes. 

Reconciliation of the beginning and ending amount of unrecognized tax benefits:

(in thousands)

Unrecognized Tax Benefits Balance at January 1, 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Gross Increases for Tax Positions of Current Year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gross Increases for Tax Positions of Prior Years. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Settlements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lapse of Statute of Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unrecognized Tax Benefits Balance at December 31, 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gross Increases for Tax Positions of Current Year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gross Decrease for Tax Positions of Prior Years. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Settlements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lapse of Statute of Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unrecognized Tax Benefits Balance at December 31, 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gross Increases for Tax Positions of Current Year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gross Decreases for Tax Positions of Prior Years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Settlements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lapse of Statute of Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unrecognized
Tax Benefits

12,694

2,117

710

(4,361)

—

11,160

3,063

(663)

—

—

13,560

1,856

(23)

—

—

Unrecognized Tax Benefits Balance at December 31, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

15,393

  The Company's total unrecognized tax benefits as of December 31, 2016, 2015 and 2014, were $15.4 
million, $13.6 million and $11.2 million, respectively. An income tax benefit of $9.3 million, net of valuation 
allowance adjustments, would be recorded if these unrecognized tax benefits are recognized. The Company cannot 
reasonably estimate the amount of the unrecognized tax benefit that could be adjusted in the next twelve months.

The Company’s continuing practice is to recognize interest and/or penalties related to income tax matters 
in income tax expense. The Company had accrued interest and penalties of $0.1 million as of both December 31, 
2016, and December 31, 2015, which have been recorded in long-term income taxes payable in the accompanying 
Consolidated Balance Sheets.

 As of December 31, 2016, the Company has concluded all U.S. federal income tax matters for the years 
through 2012. However, due to tax attributes, the IRS may calculate tax adjustments for subsequent years for 

76

 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

positions taken prior to 2012. The Company has finalized Swiss income tax returns for the years through 2012. 
There is currently no pending income tax audit.

On July 27, 2015, in Altera Corp. v. Commissioner, the U.S. Tax Court issued an opinion related to the 
treatment of stock-based compensation expense in an intercompany cost-sharing arrangement. A final decision 
was issued by the Tax Court in December 2015. In February 2016, the Commissioner appealed the Tax Court 
decision. At this time, the U.S. Department of the Treasury has not withdrawn the requirement to include stock-
based compensation expense from IRS cost-sharing regulations. The Company has reviewed this case and its 
impact and concluded that no adjustment to the consolidated financial statements is appropriate at this time. The 
Company  will  continue  to  monitor  ongoing  developments  and  potential  impacts  to  the  consolidated  financial 
statements.

9. COMMITMENTS:

Facilities  

  The Company owns its main executive, administrative, manufacturing and technical offices in San Jose, 
California. The Company also owns a research and development facility in New Jersey and a test facility in Biel, 
Switzerland. The Company leases administrative office space in Singapore and Switzerland, and R&D facilities 
in Canada and the United Kingdom, in addition to sales offices in various countries around the world.

Future minimum lease payments under all non-cancelable operating lease agreements as of December 31, 

2016, are as follows:

Fiscal Year

(in thousands)

2017 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1,591

1,414

565

248

211

358

         Total minimum lease payments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

4,387

  Total rent expense amounted to $1.9 million, $2.0 million and $1.8 million in the years ended December 31, 

2016, 2015 and 2014, respectively.

Purchase Obligations 

At December 31, 2016, the Company had no non-cancelable purchase obligations that were due beyond 

one year. 

10. LEGAL PROCEEDINGS AND CONTINGENCIES:

From time to time in the ordinary course of business, the Company becomes involved in lawsuits, or 
customers and distributors may make claims against the Company.  In accordance with ASC 450-10, Contingencies, 
the Company makes a provision for a liability when it is both probable that a liability has been incurred and the 
amount of the loss can be reasonably estimated. 

77

 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

On October 20, 2004, the Company filed a complaint against Fairchild Semiconductor International, Inc. 
and Fairchild Semiconductor Corporation (referred to collectively as “Fairchild”) in the United States District 
Court for the District of Delaware. In its complaint, the Company alleged that Fairchild has and is infringing four
of Power Integrations’ patents pertaining to pulse width modulation (PWM) integrated circuit devices. Fairchild 
denied infringement and asked for a declaration from the court that it does not infringe any Power Integrations 
patent and that the patents are invalid.  The Court issued a claim construction order on March 31, 2006 which was 
favorable to the Company. The Court set a first trial on the issues of infringement, willfulness and damages for 
October 2, 2006. At the close of the first trial, on October 10, 2006, the jury returned a verdict in favor of the 
Company finding all asserted claims of all four patents-in-suit to be willfully infringed by Fairchild and awarding 
$34.0 million in damages. Fairchild raised defenses contending that the asserted patents are invalid or unenforceable, 
and the Court held a second trial on these issues beginning on September 17, 2007. On September 21, 2007, the 
jury returned a verdict in the Company’s favor, affirming the validity of the asserted claims of all four patents-in-
suit. Fairchild submitted further materials on the issue of enforceability along with various other post-trial motions, 
and the Company filed post-trial motions seeking a permanent injunction and increased damages and attorneys’ 
fees, among other things. On September 24, 2008, the Court denied Fairchild’s motion regarding enforceability 
and ruled that all four patents are enforceable. On December 12, 2008, the Court ruled on the remaining post-trial 
motions, including granting a permanent injunction, reducing the damages award to $6.1 million, granting Fairchild 
a new trial on the issue of willful infringement in view of an intervening change in the law, and denying the 
Company’s motion for increased damages and attorneys’ fees with leave to renew the motion after the resolution 
of the issue of willful infringement.  On December 22, 2008, at Fairchild’s request, the Court temporarily stayed 
the permanent injunction for 90 days. On January 12, 2009, Fairchild filed a notice of appeal challenging the 
Court’s refusal to enter a more permanent stay of the injunction, and Fairchild filed additional motions requesting 
that both the Federal Circuit and the District Court extend the stay of injunction.  The District Court temporarily 
extended the stay pending the Federal Circuit ruling on Fairchild’s pending motion, but the Federal Circuit dismissed 
Fairchild’s appeal and denied its motion on May 5, 2009, and the District Court issued an order on May 13, 2009 
confirming the reinstatement of the permanent injunction as originally entered in December 2008.  On June 22, 
2009, the Court held a brief bench re-trial on the issue of willful infringement.  On July 22, 2010, the Court found 
that Fairchild willfully infringed all four of the asserted patents, and the Court also invited briefing on enhanced 
damages and attorneys’ fees. Fairchild also filed a motion requesting that the Court amend its findings regarding 
willfulness.  On January 18, 2011, the Court denied Fairchild’s request to amend the findings regarding Fairchild’s 
willful infringement and doubled the damages award against Fairchild but declined to award attorneys’ fees. On 
February 3, 2011, the Court entered final judgment in favor of the Company for a total damages award of $12.9 
million. Fairchild filed a notice of appeal challenging the final judgment and a number of the underlying rulings, 
and the Company filed a cross-appeal seeking to increase the damages award. The appeal was argued on January 
11, 2012, and the Federal Circuit issued a mixed ruling on March 26, 2013, affirming Fairchild’s infringement of 
certain claims that support the basis for the permanent injunction while reversing, vacating, and remanding the 
findings with respect to other claims, including the Company’s claim for damages. The Company filed a petition 
seeking Supreme Court review of the Federal Circuit’s ruling on damages issues, and the Supreme Court called 
for a response from Fairchild but ultimately declined to review the case. On remand, the Company intends to pursue 
its claim for financial compensation based on Fairchild’s infringement.

On May 9, 2005, the Company filed a Complaint with the U.S. International Trade Commission (ITC) 
under section 337 of the Tariff Act of 1930, as amended, 19 U.S.C. Section 1337 against System General (SG). 
The Company filed a supplement to the complaint on May 24, 2005. The Company alleged infringement of its 
patents  pertaining  to  PWM  integrated  circuit  devices  produced  by  SG,  which  are  used  in  power  conversion 
applications such as power supplies for computer monitors. The Commission instituted an investigation on June 8, 
2005 in response to the Company’s complaint. SG filed a response to the ITC complaint asserting that the patents-
in-suit were invalid and not infringed. The Company subsequently and voluntarily narrowed the number of patents 
and claims in suit, which proceeded to a hearing. The hearing on the investigation was held before the Administrative 
Law Judge (ALJ) from January 18 to January 24, 2006. Post-hearing briefs were submitted and briefing concluded 

78

 
  
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

February 24, 2006. The ALJ’s initial determination was issued on May 15, 2006. The ALJ found all remaining 
asserted claims valid and infringed, and recommended the exclusion of the infringing products as well as certain 
downstream products that contain the infringing products. After further briefing, on June 30, 2006, the Commission 
decided not to review the initial determination on liability, but did invite briefs on remedy, bonding and the public 
interest. On August 11, 2006, the Commission issued an order excluding from entry into the United States the 
infringing SG PWM chips, and any liquid-crystal-display (LCD) computer monitors, AC printer adapters and 
sample/demonstration circuit boards containing an infringing SG chip. The U.S. Customs Service is authorized to 
enforce the exclusion order. On October 11, 2006, the presidential review period expired without any action from 
the President, and the ITC exclusion order is now in full effect. SG appealed the ITC decision, and on November 19, 
2007, the Federal Circuit affirmed the ITC’s findings in all respects.  On October 27, 2008, SG filed a petition to 
modify the exclusion order in view of a recent Federal Circuit opinion in an unrelated case, and the Company 
responded to oppose any modification, but the Commission modified the exclusion order on February 27, 2009.  
Nevertheless, the exclusion order still prohibits SG and related entities from importing the infringing SG chips 
and any LCD computer monitors, AC printer adapters, and sample/demonstration circuit boards containing an 
infringing SG chip.

On May 23, 2008, the Company filed a complaint against Fairchild Semiconductor International, Inc., 
Fairchild  Semiconductor  Corporation,  and  Fairchild’s  wholly  owned  subsidiary  System  General  Corporation 
(referred to collectively as “Fairchild”), in the United States District Court for the District of Delaware. In its 
complaint, the Company alleged that Fairchild has infringed and is infringing three patents pertaining to power 
supply controller integrated circuit devices. Fairchild answered the Company’s complaint on November 7, 2008, 
denying infringement and asking for a declaration from the Court that it does not infringe any Power Integrations 
patent and that the patents are invalid and unenforceable. Fairchild’s answer also included counterclaims accusing 
the Company of infringing three patents pertaining to primary side power conversion integrated circuit devices.  
Fairchild had earlier brought these same claims in a separate suit against the Company, also in Delaware, which 
Fairchild dismissed in favor of adding its claims to the Company’s already pending suit against Fairchild. The 
Company has answered Fairchild’s counterclaims, denying infringement and asking for a declaration from the 
Court that it does not infringe any Fairchild patent and that the Fairchild patents are invalid. Fairchild also filed a 
motion to stay the case, but the Court denied that motion on December 19, 2008. On March 5, 2009, Fairchild 
filed a motion for summary judgment to preclude any recovery for post-verdict sales of parts found to infringe in 
the parties’ other ongoing litigation, described above, and the Company filed its opposition and a cross-motion to 
preclude Fairchild from re-litigating the issues of infringement and damages for those same products. On June 26, 
2009, the Court held a hearing on the parties’ motions, and on July 9, 2009 the Court issued an order denying the 
parties’ motions but staying proceedings with respect to the products that were found to infringe and which are 
subject to the injunction in the other Delaware case between the parties pending the entry of final judgment in that 
case; those products are expected to be addressed in the context of the parties’ remand proceedings following the 
appeal in their earlier litigation in Delaware, and the remainder of the case is proceeding. On December 18, 2009, 
the Court issued an order construing certain terms in the asserted claims of the Company’s and Fairchild’s patents 
in suit. Following the Court’s ruling on claim construction, Fairchild withdrew its claim related to one of its patents 
and significantly reduced the number of claims asserted for the remaining two patents. The parties thereafter filed 
and argued a number of motions for summary judgment, and the Court denied the majority of the parties’ motions 
but granted the Company’s motion to preclude Fairchild from re-arguing validity positions that were rejected in 
the prior case between the parties. Because the assigned Judge retired at the end of July 2010, the case was re-
assigned to a different Judge, and the Court vacated the trial schedule and had the parties provide their input on 
the appropriate course of action. The Court thereafter set a trial schedule with the jury trial on infringement and 
validity to begin in July 2011. On April 18, 2011, the Court rescheduled the trial to begin in January 2012, and on 
June 2, 2011, the Court moved the trial date to April 2012 to permit the parties to address another patent the 
Company accused Fairchild of infringing. Following a trial in April 2012, the jury returned a verdict finding that 
Fairchild infringes two of the Company’s patents, that Fairchild has induced others to infringe the Company’s 
patents, and also upheld the validity of the infringed patents. Of the two remaining counterclaim patents Fairchild 

79

 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

asserted in the case, one was found not to be infringed, but the jury found the second patent to be infringed by a 
limited  number  of  the  Company’s  products,  although  the  jury  further  found  the  Company  did  not  induce 
infringement by any customers, including customers outside the United States. On March 29, 2013, the District 
Court denied most of the parties’ post-trial motions on liability but granted the Company’s motion for judgment 
as a matter of law finding that Fairchild infringed another of the Company’s patents. On April 25, 2013, the Court 
denied both parties’ motions regarding the unenforceability of each other’s patents. The Company is challenging 
adverse findings on appeal; nevertheless, the Company estimates that even if the verdict on Fairchild’s patent were 
ultimately upheld, the sales potentially impacted would amount to less than 0.5% of the Company’s revenues. The 
Company requested an injunction preventing further infringement of its own patents by Fairchild, and Fairchild 
requested an injunction as well. Following a hearing on the issue in June 2014, the Court denied Fairchild’s request 
for an injunction against the Company and granted the Company’s request for an injunction against Fairchild. On 
January 13, 2015, the District Court entered final judgment on the liability and validity issues discussed above, 
and both parties filed appeals with the Federal Circuit. After briefing was completed, oral argument on the appeal 
took place in early July 2016, and on December 12, 2016, the Federal Circuit issued its opinion in the appeal, 
overturning the lone infringement verdict against the Company, finding one of the Company’s patents invalid, and 
overturning the District Court’s jury instruction on inducement.  In view of the Federal Circuit’s rejection of the 
District Court’s jury instruction on inducement, the Court also vacated the inducement findings and associated 
injunction against Fairchild and remanded the case for a retrial on inducement, but the underlying validity and 
infringement findings against Fairchild on those two patents remain intact. On remand, the Company will also be 
seeking financial damages, as well as enhanced damages for willful infringement; these issues are to be decided 
in separate proceedings at a later date.

On June 28, 2004, the Company filed a complaint for patent infringement in the U.S. District Court, 
Northern  District  of  California,  against  SG  Corporation,  a  Taiwanese  company,  and  its  U.S.  subsidiary.  The 
Company’s complaint alleged that certain integrated circuits produced by SG infringed and continue to infringe 
certain of its patents. On June 10, 2005, in response to the initiation of the International Trade Commission (ITC) 
investigation discussed above, the District Court stayed all proceedings.  Subsequent to the completion of the ITC 
proceedings,  the  District  Court  temporarily  lifted  the  stay  and  scheduled  a  case  management  conference.  On 
December 6, 2006, SG filed a notice of appeal of the ITC decision as discussed above. In response, and by agreement 
of the parties, the District Court vacated the scheduled case management conference and renewed the stay of 
proceedings pending the outcome of the Federal Circuit appeal of the ITC determination. On November 19, 2007, 
the Federal Circuit affirmed the ITC’s findings in all respects, and SG did not file a petition for review. The parties 
subsequently  filed  a  motion  to  dismiss  the  District  Court  case  without  prejudice.    On  November  4,  2009,  the 
Company  re-filed  its  complaint  for  patent  infringement  against  SG  and  its  parent  corporations,  Fairchild 
Semiconductor  International,  Inc.  and  Fairchild  Semiconductor  Corporation,  to  address  their  continued 
infringement  of  patents  at  issue  in  the  original  suit  that  recently  emerged  from  SG  requested  reexamination 
proceedings before the U.S. Patent and Trademark Office (USPTO). The Company seeks, among other things, an 
order enjoining SG and Fairchild from infringing the Company’s patents and an award of damages resulting from 
the alleged infringement. Fairchild has denied infringement and asked for a declaration from the Court that it does 
not infringe any Power Integrations patent, that the patents are invalid, and that one of the two of the Company’s 
patents now at issue in the case is unenforceable. On May 5, 2010, SG and Fairchild filed an amended answer 
including  counterclaims  accusing  the  Company  of  infringing  two  patents,  and  since  that  time  Fairchild  has 
withdrawn its claim for infringement of one of the patents it originally asserted against the Company but added 
another patent to the case over the Company’s objections; the Company contests these claims vigorously. Both 
parties filed summary judgment motions and challenges to each other’s experts’ testimony, and the Court granted 
the Company’s motion for summary judgment of non-infringement with respect to one of Fairchild’s two patents. 
Following a trial on the remaining claims in February 2014, the jury returned a verdict in the Company’s favor, 
affirming the validity of the asserted claims of the Company’s patents-in-suit, finding that SG and Fairchild infringed 
the Company’s asserted patents and induced infringement by others, and awarding $105.0 million in damages. The 
Jury also rejected Fairchild’s remaining counterclaims for infringement against the Company. Fairchild challenged 

80

 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

these rulings in post-trial motions, but the judge confirmed the jury’s determinations on infringement and damages, 
although the Court declined to find Fairchild’s infringement willful. Fairchild also pressed its unenforceability 
claim with respect to one of the two patents it was found to infringe in post-trial briefing, but the Court rejected 
Fairchild’s unenforceability claim. Fairchild also requested reconsideration of the damages determinations, and 
the Court granted a new trial with respect to damages but none of the other issues addressed in the previous trial, 
with the retrial scheduled for December 2015. Thereafter, the parties completed pretrial proceedings challenging 
each other’s experts, and the Court granted portions of each party’s motions limiting the scope of expert testimony 
for purposes of the damages retrial, but neither party was successful in their efforts to prevent the other side’s 
experts from testifying at trial. Following a retrial on the issue of damages in December 2015, the jury returned a 
verdict in the Company’s favor, finding that the Company’s patented technology created the basis for customer 
demand for the infringing Fairchild products and awarding $139.8 million in damages. Although the jury awarded 
damages, at this stage of the proceedings the Company cannot state the amount, if any, it might ultimately recover 
from Fairchild, and no benefits have been recorded in the Company’s consolidated financial statements as a result 
of the damages verdict. Fairchild filed post-trial motions challenging the verdict, but the Court rejected Fairchild’s 
motions challenging the damages verdict in August 2016. The Company also filed motions requesting enhanced 
damages and attorney fees and reinstatement of the willfulness finding against Fairchild in view of an intervening 
change of law; on January 13, 2017, the District Court reinstated the finding that Fairchild’s infringement was 
willful but declined to enhance damages or award fees.  Fairchild has filed a further challenge to the verdict, and 
a ruling on that remaining motion is expected in the coming months, along with Fairchild’s appeal on the merits.

In  February  2010,  Fairchild  and  System  General  (SG)  filed  suits  for  patent  infringement  against  the 
Company, Power Integrations Netherlands B.V., and representative offices of Power Integrations Netherlands in 
Shanghai and Shenzhen with the Suzhou Intermediate Court in the People’s Republic of China. The suits asserted 
four Chinese patents and sought an injunction and damages of approximately $19.0 million. Power Integrations 
Netherlands filed invalidation proceedings for all four asserted SG patents in the People’s Republic of China Patent 
Reexamination Board (PRB) of the State Intellectual Property Office (SIPO), and all four challenges were accepted 
by the PRB, with hearings conducted in September 2010. In early January 2012, the Company received rulings 
from the PRB invalidating the majority of the claims Fairchild asserted in litigation.  The Suzhou Court conducted 
evidentiary hearings in 2012 and issued rulings in late December 2012, finding that the Company did not infringe 
any of the asserted patents. Fairchild filed appeals challenging the Suzhou Court’s non-infringement rulings, and 
the appeals court in Nanjing held further hearings in the infringement proceedings in late 2014, but Fairchild has 
since dismissed its appeals, bringing the infringement proceedings to a close in the first quarter of 2015.

On July 11, 2011, the Company filed a complaint in the U.S. District Court, District of Columbia, against 
David Kappos in his capacity as Director of the United States Patent and Trademark Office (PTO) as part of the 
ongoing reexamination proceedings related to one of the patents asserted against Fairchild and SG in the Delaware 
litigation described above. The Company filed a motion for summary judgment on a preliminary jurisdictional 
issue, and the PTO filed a cross-motion to dismiss on this same issue; briefing on those motions was completed 
in October, 2011. On November 18, 2013, the Court granted the PTO’s motion and transferred the case to the 
Federal Circuit, where additional briefing took place. Following a hearing in May 2015, the Federal Circuit ruled 
in the Company’s favor on August 12, 2015, overturning the PTO’s claim construction and remanding the case for 
further proceedings.  On remand, the PTO ignored the Federal Circuit’s guidance, so the party has filed another 
appeal to the Federal Circuit; further briefing and proceedings on the second appeal will take place in the coming 
months.

On May 1, 2012, Fairchild Semiconductor Corporation and Fairchild's wholly owned subsidiary, System 
General Corporation (referred to collectively as “Fairchild”), filed a complaint against the Company in the United 
States District Court for the District of Delaware.  In its complaint, Fairchild alleged that the Company has infringed 
and is infringing four patents pertaining to power conversion integrated circuit devices. The Company answered 
Fairchild’s complaint, denying infringement and asking for a declaration from the Court that it does not infringe 

81

 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

any Fairchild patent and that the Fairchild patents are invalid, and the Company also asserted counterclaims against 
Fairchild for infringement of five of the Company’s patents. Fairchild has withdrawn its claim for infringement 
of one of the patents it asserted against the Company after the Company’s preliminary challenge. The parties 
streamlined their contentions in view of the Court's pretrial rulings, and following a trial in late May and early 
June 2015, a jury returned a verdict finding that Fairchild infringed one of the Company's patents, that Fairchild 
has induced and contributed to others' infringement of  the Company's patent, and that the Company induced 
infringement of a Fairchild patent that was previously found infringed in the 2012 trial described above, with a 
damages award of $2.4 million in favor of Fairchild. Both parties filed post-trial motions and challenges to various 
portions of the jury verdicts, and the Court addressed the first wave of post-trial motions, denying each side’s 
challenges to the verdict and denying Fairchild’s request for an injunction. In parallel proceedings, the Federal 
Circuit overturned the underlying finding of infringement against the Company on the Fairchild patent-in-suit, and 
the Company moved to vacate the inducement and damages judgment against the Company, a motion that Fairchild 
did not oppose. Further proceedings and an appeal of the outstanding issues are expected in the coming months.

On  October  21,  2015,  the  Company  filed  a  complaint  for  patent  infringement  against  Fairchild 
Semiconductor Corporation, Fairchild Semiconductor International, Inc., and wholly-owned subsidiary Fairchild 
(Taiwan) Corporation (referred to collectively as “Fairchild”) to address Fairchild’s continued infringement of two
patents Fairchild was previously found to infringe in the three District Court cases the Company brought against 
Fairchild discussed above. In each of the three prior cases, Fairchild was found to infringe one of the patents at 
issue in the latest complaint, and Fairchild’s challenges to the validity of the patents were rejected during the course 
of the prior lawsuits as well. Fairchild has answered the Company’s complaint, denying infringement and asking 
for a declaration from the Court that it does not infringe any Power Integrations patent and that the patents are 
invalid. Fairchild’s answer also included counterclaims accusing the Company of infringing four patents pertaining 
to power conversion integrated circuit devices, including one patent the Company was found not to infringe in 
prior litigation. The Company has answered Fairchild’s counterclaims, denying infringement and asking for a 
declaration from the Court that it does not infringe any Fairchild patent and that the Fairchild patents are invalid. 
On December 15, 2016, the Court stayed the case pending resolution of the parties inter partes review (IPR) and 
reexamination proceedings regarding the patents-in-suit.

On March 10, 2016, Silver Star Capital, LLC filed a petition with the U.S. Patent & Trademark Office 
(PTO) requesting that the PTO conduct an inter partes review (IPR) of the validity of the Company’s U.S. Patent 
No. 6,212,079 (the ’079 patent), which the Company has asserted against Fairchild Semiconductor in the California 
litigation initiated in 2004, as discussed above.  The Company’s ’079 patent is also asserted in the Company’s most 
recent lawsuit against Fairchild filed in October 2015, also discussed above. On March 29, 2016, ON Semiconductor 
Corporation filed another petition requesting inter partes review of the Company’s ’079 patent. Since that time, 
ON Semiconductor has filed eleven more IPR petitions requesting review of various patents that the Company 
previously asserted against Fairchild as described above. The PTO denied Silver Star Capital’s IPR petition on the 
’079 patent but instituted IPR proceedings with respect to ON Semiconductor’s petition directed to the ’079 patent, 
with further proceedings expected in the coming months. Further proceedings are also expected with respect to 
ON Semiconductor’s other IPR petitions in the coming months.  Although the validity of the Company’s challenged 
patents has previously been confirmed in the Company’s District Court litigation with Fairchild and in many cases 
in prior PTO reexamination proceedings as well, and though the Company intends to vigorously defend the validity 
of its patents, the outcome of the IPR proceedings is uncertain.

On April 1, 2016, Opticurrent, LLC filed a complaint against the Company in the United States District 
Court for the Eastern District of Texas.  In its complaint, Opticurrent alleges that the Company has infringed and 
is infringing one patent pertaining to transistor switch devices. The Company has filed a motion to transfer the 
case to California, which will be addressed in the coming months. Further proceedings and discovery are expected 
over the course of the coming months, with trial currently scheduled for October 2017. The Company intends to 
vigorously defend itself against Opticurrent’s claims.

82

 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

On August 11, 2016, ON Semiconductor filed a complaint against the Company in the United States 
District Court for the District of Arizona.  In its complaint, ON Semiconductor alleges that the Company has 
infringed and is infringing five patents and requests injunctive relief, and the complaint also seeks a declaration 
of non-infringement with respect to three of the Company’s patents that were previously asserted against Fairchild 
Semiconductor. The Company has not yet answered ON Semiconductor’s complaint, but the Company has filed 
a motion to dismiss and/or transfer the case to the Northern District of California, which will be addressed in the 
coming months.  No date has been set for trial, but the Company believes it has valid defenses and intends to 
vigorously defend itself against ON Semiconductor’s claims.

On November 1, 2016, the Company filed a lawsuit against ON Semiconductor in the United States 
District Court for the Northern District of California to address ON Semiconductor’s infringement of six patents.  
No date has been set for trial, but ON Semiconductor has filed a motion requesting that the case be transferred to 
Arizona, an issue that will be addressed in the coming months.

On December 27, 2016, ON Semiconductor filed a complaint against the Company in the United States 
District Court for the Eastern District of Texas. In its complaint, ON Semiconductor alleges that the Company has 
infringed  and  is  infringing  six  patents  and  requests  injunctive  relief. The  Company  has  not  yet  answered  ON 
Semiconductor’s complaint, and no date has been set for trial, but the Company believes it has valid defenses and 
intends to vigorously defend itself against ON Semiconductor’s claims.

The Company is unable to predict the outcome of legal proceedings with certainty, and there can be no 
assurance that Power Integrations will prevail in the above-mentioned unsettled litigations.  These litigations, 
whether or not determined in Power Integrations’ favor or settled, will be costly and will divert the efforts and 
attention of the Company’s management and technical personnel from normal business operations, potentially 
causing a material adverse effect on the business, financial condition and operating results.  Currently, the Company 
is  not  able  to  estimate  a  loss  or  a  range  of  loss  for  the  ongoing  litigation  disclosed  above,  however  adverse 
determinations in litigation could result in monetary losses, the loss of proprietary rights, subject the Company to 
significant liabilities, require Power Integrations to seek licenses from third parties or prevent the Company from 
licensing the technology, any of which could have a material adverse effect on the Company’s business, financial 
condition and operating results.  

11. ACQUISITIONS:

Cambridge Semiconductor Limited

In December 2014, the Company entered into a loan agreement with Cambridge Semiconductor Limited 
(CamSemi), a UK company, in which $6.6 million was outstanding as of December 31, 2014. The estimated fair 
value of the loan, which was a level 3 fair value measurement, approximated the carrying value of $6.6 million, 
as the loan was outstanding for less than a month and the interest rate approximated a market rate for such a loan. 
The loan was in anticipation of a definitive agreement the Company entered into to acquire CamSemi on January 
2, 2015.

On  January  2,  2015,  the  Company  acquired  100%  of  the  shares  outstanding  of  CamSemi  for  total 
consideration of approximately $23.3 million, of which $16.7 million was paid in cash and $6.6 million was applied 
against the outstanding loan owed to the Company. The acquisition-related costs for the purchase of CamSemi 
totaled $1.0 million, with $0.8 million recognized in 2014 and $0.2 million recognized in 2015.

  CamSemi  was  acquired  to  accelerate  the  Company's  product  development  efforts  for  the  low-power 
market. The acquisition also broadens the Company's technology and product portfolio for low-power applications, 

83

 
 
 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

particularly in the mobility and LED lighting markets. The purchase price allocated to goodwill in the acquisition 
(as noted in the purchase price allocation below) is related largely to synergies and economies of scale expected 
from combining the operations of CamSemi with those of the Company. 

The following table summarizes the purchase price and estimated fair values of the assets acquired and 

the liabilities assumed as of January 2, 2015, the completion of the acquisition of CamSemi: 

(in thousands)

Total Amount

Assets Acquired
Cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Accounts receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inventories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses and other current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tax receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intangible assets:

Developed technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer relationships . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Goodwill. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total assets acquired. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Liabilities Assumed
Current liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taxes payable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total liabilities assumed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total purchase price . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

1,134
1,891
1,409
408
1,093

6,600
2,420
11,250
26,205

1,832
1,090
2,922
23,283

The following table represents details of the purchased intangible assets:

Developed technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Customer relationships . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total acquired CamSemi intangibles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

6,600
2,420
9,020

Fair Value 
Amount
(in thousands)

Estimated 
Useful Life
(in years)
3 - 7
5

The fair value of the identifiable intangible assets: developed technology and customer relationships were 

determined based on the following approach.

Developed  Technology. The  income  approach  was  used  to  value  the  acquired  developed  technology. 
Revenue attributable to the Company’s technology was estimated based on expected evolution of the technology 
over time. Expenses were assumed to reflect the costs necessary to support the developed technology. The present 
value was capitalized as developed technology as of the acquisition date and is being amortized using a straight-
line method to cost of revenues over the estimated life of 3 - 7 years. 

Customer Relationships. An intangible customer relationship asset was recognized to the extent that the 
Company  was  expected  to  benefit  from  future  revenues  reasonably  anticipated  given  the  historical  customer 
relationships and operating practices of CamSemi. In order to determine the fair value of the customer relationships, 
the Company’s analysis assumed that the Company would immediately benefit from the economics generated by 
CamSemi’s  existing  customer  relationships.  This  amount  was  reduced  by  the  potential  impact  given  no  past 
customer relationships and the assumption that the Company could reacquire the customer relationships and ramp 
up to a similar level of revenue within two years. The fair value of customer relationships was capitalized as of 

84

 
 
 
 
 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

the acquisition date and is being amortized on a straight line basis to sales and marketing expenses over the estimated 
life of 5 years. 

Pro forma results of operations for this acquisition have not been presented because it is not material to 

the Company’s  consolidated financial statements.

Corporate Headquarters Building 

In August 2015, the Company purchased a building adjacent to its corporate headquarters in San Jose, 
California to support the continued growth of the business. The purchase has been accounted for using the acquisition 
method of accounting in accordance with ASC 805, Business Combinations, as the building had existing rental 
income resulting from in-place lease agreements with third-party tenants. The aggregate purchase price of $10.4 
million, funded with cash on hand, was allocated as follows: $3.5 million for land, $6.3 million for building and 
improvements,  $0.7  million  for  in-place  leases  and  $(0.1)  million  for  liabilities  assumed.  The  building  and 
improvements  are  being  depreciated  on  a  straight-line  basis  over  an  estimated  useful  life  of  up  to  30  years. 
Additionally, as a result of the purchase, the Company acquired existing third-party leases that were valued as in-
place lease intangible assets and are being amortized over the weighted average estimated life of two years. The 
valuation of the acquired in-place leases were estimated by the Company based on the amount of avoided cash 
outflows necessary to originate such leases. Acquisition-related costs in connection with the building purchase 
were included in other income in the consolidated statements of income and were not material for the periods 
presented.

Rental income from third-party leases, and the proportionate share of building expenses for those leases, 
are included in other income in the consolidated statements of income from the date of acquisition. These amounts 
were not material for the periods presented.

12. RETIREMENT PLANS:

The Company sponsors a defined benefit pension plan (Pension Plan) for its Swiss subsidiary in accordance 
with the legal requirements of Switzerland. The plan assets, which provide benefits in the event of an employee’s 
retirement, death or disability, are held in legally autonomous trustee-administered funds that are subject to Swiss 
law. Benefits are based on the employee’s age, years of service and salary, and the plan is financed by contributions 
by both the employee and the Company.  

The net periodic benefit cost of the Pension Plan was not material to the Company's financial statements 
during the years ended December 31, 2016, 2015 and 2014. At December 31, 2016, the projected benefit obligation 
was $11.8 million, the plan assets were $7.9 million and the net pension liability was $3.9 million. As of December 
31, 2015, the projected benefit obligation was $9.0 million, the plan assets were $6.0 million, and the net pension 
liability was $3.0 million. The Company has recorded the unfunded amount as a liability in its consolidated balance 
sheet  at  December  31,  2016  and  2015,  under  the  other  liabilities  caption.  The  Company  expects  to  make 
contributions to the Pension Plan of approximately $0.4 million during 2017. The unrealized actuarial loss on 
pension benefits, net of tax at December 31, 2016, 2015 and 2014 was $1.9 million, $1.6 million and $1.2 million, 
respectively. These amounts were reflected in Note 2 above under the caption accumulated other comprehensive 
loss. 

In accordance with the Compensation-Retirement Benefits Topic of ASC 715-20, Defined Benefits Plan, 
the Company recognizes the over-funded or under-funded status of its defined post-retirement plan as an asset or 
liability in its statement of financial position. The company measured the plan assets and benefit obligations as of 
the date of the fiscal year-end. 

85

 
 
 
 
 
 
POWER INTEGRATIONS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

13. BANK LINE OF CREDIT:

On July 5, 2012, the Company entered into a Credit Agreement with two banks. The Credit Agreement 
provides the Company with a $100.0 million revolving line of credit to use for general corporate purposes with a 
$20.0 million sublimit for the issuance of standby and trade letters of credit. The Credit Agreement was amended 
on April 1, 2014, to extend the Credit Agreement termination date from July 5, 2015, to April 1, 2017, with all 
other terms of the Credit Agreement remaining the same.

On July 27, 2016, the Company terminated the Credit Agreement and entered into a new Credit Agreement 
with a bank (the "New Credit Agreement"). The New Credit Agreement provides the Company with a $75.0 million
revolving line of credit to use for general corporate purposes with a $20.0 million sub-limit for the issuance of 
standby and trade letters of credit. The Company’s ability to borrow under the revolving line of credit is conditioned 
upon the Company’s compliance with specified covenants, including reporting and financial covenants, primarily 
a minimum cash requirement and a debt to earnings ratio, with which the Company is currently in compliance. 
The New Credit Agreement terminates on July 26, 2019; all advances under the revolving line of credit will become 
due on such date, or earlier in the event of a default. As of December 31, 2016, the Company had no amount 
outstanding under the New Credit Agreement.

14. SELECTED QUARTERLY INFORMATION (Unaudited):

  The following tables set forth certain data from the Company's consolidated statements of income for 

each of the quarters in the years ended December 31, 2016 and 2015.

  The unaudited quarterly consolidated financial statements have been prepared on the same basis as the 
audited consolidated financial statements contained herein and include all adjustments that the Company considers 
necessary for a fair presentation of such information when read in conjunction with the Company's annual audited 
consolidated financial statements and notes thereto appearing elsewhere in this report. The operating results for 
any quarter are not necessarily indicative of the results for any subsequent period or for the entire fiscal year. 

Three Months Ended

(unaudited)

Dec. 31,

Sept. 30,

June 30, Mar. 31,

Dec. 31,

Sept. 30,

June 30, Mar. 31,

(in thousands, except per share data)

2016

2016

2016

2016

2015

2015

2015

2015

Net revenues . . . . . . . . . . . . . . . . . . . . . $101,108

$103,790

$ 97,169

$ 85,326

$ 87,289

$ 88,878

$ 85,265

$ 82,557

Gross profit. . . . . . . . . . . . . . . . . . . . . . $ 49,384

$ 51,193

$ 47,637

$ 42,947

$ 42,916

$ 44,161

$ 44,018

$ 42,292

Net income . . . . . . . . . . . . . . . . . . . . . . $ 13,617

$ 14,165

$ 11,265

Earnings per share

Basic . . . . . . . . . . . . . . . . . . . . . $

Diluted . . . . . . . . . . . . . . . . . . . $

0.47

0.46

$

$

0.49

0.48

$

$

0.39

0.38

$

$

$

8,843

$ 12,701

$ 11,513

0.31

0.30

$

$

0.45

0.44

$

$

0.40

0.39

$

$

$

8,590

0.29

0.29

$

$

$

6,343

0.22

0.21

Shares used in per share calculation

Basic . . . . . . . . . . . . . . . . . . . . .

Diluted . . . . . . . . . . . . . . . . . . .

29,196

29,914

28,972

29,625

28,850

29,422

28,679

29,244

28,483

29,126

28,855

29,298

29,368

30,034

29,309

30,058

On  January  2,  2015,  the  Company  acquired  100%  of  the  shares  outstanding  of  CamSemi  for  total 
consideration of approximately $23.3 million, of which $16.7 million was paid in cash and $6.6 million was applied 
against the outstanding loan owed to the Company. The acquisition-related costs for the purchase of CamSemi 
totaled $1.0 million, with $0.8 million recognized in 2014 and $0.2 million recognized in 2015. See Note 11, 
Acquisitions.

86

 
 
Schedule II

Valuation and Qualifying Accounts 

The  Company  maintains  an  allowance  for  doubtful  accounts  for  estimated  losses  resulting  from  the 
inability of customers to make required payments. This allowance is established using estimates formulated by the 
Company’s management based upon factors such as the composition of the accounts receivable aging, historical 
bad debt, changes in payments patterns, customer creditworthiness, and current economic trends. The Company 
maintains an allowance for the distributors’ ship and debit credits relating to the sell-through of the Company’s 
products. This reserve is established using the Company’s historical ship and debit amounts and levels of inventory 
in the distributor channels.

Following is a summary of the activity in the allowance for doubtful accounts and allowance for ship and 

debit credits:

(in thousands)
Allowance for doubtful accounts:

Year ended December 31, 2014. . . . . . . . . $

Year ended December 31, 2015. . . . . . . . . $

Year ended December 31, 2016. . . . . . . . . $

Balance at
Beginning of
Period

Charged to
Costs and
Expenses

Deductions(1)

Balance at End
of Period

120

191

318

$

$

$

135

133

207

$

$

$

(64) $

(6) $

— $

191

318

525

_______________
(1)  Deductions relate to amounts written off against the allowance for doubtful accounts. 

(in thousands)
Allowance for ship and debit credits:

Year ended December 31, 2014. . . . . . . . . $

Year ended December 31, 2015. . . . . . . . . $

Year ended December 31, 2016. . . . . . . . . $

Balance at
Beginning of
Period

Charged to
Costs and
Expenses

Deductions(2)

Balance at End
of Period

28,696

27,425

34,415

$

$

$

177,260

195,669

262,501

$

$

$

(178,531) $

(188,679) $

(258,841) $

27,425

34,415

38,075

_______________
(2)  Deductions relate to ship and debit credits issued which adjust the sell-in price from the standard 
distribution price to the pre-approved lower price.  Refer to Note 2, Summary of Significant Accounting 
Policies, for the Company’s revenue recognition policy, including the Company’s accounting for ship 
and debit claims.

87

 
 
 
 
Item 16. Form 10-K Summary

Not provided.

88

 
  Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this 

report to be signed on its behalf by the undersigned thereunto duly authorized. 

SIGNATURES

Dated: February 8, 2017

By:

/s/ SANDEEP NAYYAR

POWER INTEGRATIONS, INC.

Sandeep Nayyar
Chief Financial Officer (Duly Authorized 
Officer, Principal Financial Officer and Chief 
Accounting Officer)

89

 
POWER OF ATTORNEY

  KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below 
constitutes and appoints Balu Balakrishnan and Sandeep Nayyar his true and lawful attorney-in-fact and agent, 
with full power of substitution and, for him and in his name, place and stead, in any and all capacities to sign any 
and all amendments to this Report on Form 10-K, and to file the same, with all exhibits thereto and other documents 
in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and 
agent full power and authority to do and perform each and every act and thing requisite and necessary to be done 
in connection therewith, as fully to all intents and purposes as he might or could do in person, hereby ratifying 
and confirming all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause 
to be done by virtue hereof.

PURSUANT TO THE REQUIREMENTS OF THE SECURITIES EXCHANGE ACT OF 1934, THIS 
REPORT HAS BEEN SIGNED BY THE FOLLOWING PERSONS ON BEHALF OF THE REGISTRANT 
AND IN THE CAPACITIES AND ON THE DATES INDICATED.

Dated: February 8, 2017

By:

/s/ BALU BALAKRISHNAN

Balu Balakrishnan

President, Chief Executive Officer

(Principal Executive Officer)

Dated: February 8, 2017

By:

/s/ SANDEEP NAYYAR

Sandeep Nayyar
Chief Financial Officer

(Principal Financial and Principal
Accounting Officer)

Dated: February 8, 2017

By:

/s/ ALAN D. BICKELL

Dated: February 8, 2017

Dated: February 8, 2017

Dated: February 8, 2017

Dated: February 8, 2017

Dated: February 8, 2017

Alan D. Bickell

Director

By:

/s/ NICHOLAS E. BRATHWAITE
Nicholas E. Brathwaite

Director

By:

By:

By:

By:

/s/ E. FLOYD KVAMME
E. Floyd Kvamme
Director and Chairman of the Board

/s/ STEVEN J. SHARP
Steven J. Sharp
Director

/s/ BALAKRISHNAN S. IYER
Balakrishnan S. Iyer
Director

/s/ WILLIAM GEORGE
William George
Director

90

 
 
 
 
 
 
POWER INTEGRATIONS, INC.
INDEX TO EXHIBITS 
TO
FORM 10-K ANNUAL REPORT
For the Year Ended 
December 31, 2016

Exhibit
Number

Exhibit Description

3.1 Restated Certificate of Incorporation

Incorporation by Reference

Form
10-K

File
Number
000-23441

Exhibit/
Appendix
Reference
3.1

Filed
Herewith

Filing Date
2/29/2012

3.2 Amended and Restated Bylaws

8-K

000-23441

3.1

4/26/2013

4.1 Reference is made to Exhibits 3.1 to

3.2

10.1* Form of Indemnity Agreement for

S-1

333-35421

10.1

9/11/1997

directors and officers

10.2* Power Integrations, Inc. Compliance
Policy Regarding IRC Section 409A

10.3*

1997 Employee Stock Purchase Plan,
as amended

10.4* Forms of agreement under 1997
Employee Stock Purchase Plan

10.5*

1997 Stock Option Plan (as amended
through January 25, 2005)

10.6* Forms of Option Agreements under
the 1997 Stock Option Plan

10-K

000-23441

10.63

3/2/2009

DEF14A

000-23441 Appendix B

3/25/2016

S-1

333-35421

10.5

9/11/1997

10-Q

000-23441

10.5

5/6/2005

10-K

000-23441

10.41

8/8/2007

10.7* Forms of Option Agreements under

10-K

000-23441

10.40

8/8/2007

the 1997 Stock Option Plan with
Executive Officers in connection with
the Chief Executive Officer Benefits
Agreement and the Executive Officer
Benefits Agreements

10.8* Amendment to Immediately

10-K

000-23441

10.59

3/2/2009

Exercisable Non-Qualified Stock
Option Agreement between Power
Integrations, Inc. and Balu
Balakrishnan, dated February 2, 2009

10.9*

1997 Outside Directors Stock Option
Plan

10.10* Amendment No. 1 to the Power
Integrations, Inc. 1997 Outside
Directors Stock Option Plan, effective
as of January 27, 2009

10.11* Amendment No. 2 to the Power
Integrations, Inc. 1997 Outside
Directors Stock Option Plan, effective
as of April 12, 2010

10-Q

000-23441

10.3

8/6/2009

10-K

000-23441

10.62

3/2/2009

10-Q

000-23441

10.2

5/6/2010

10.12* Forms of agreement under 1997

S-1

333-35421

10.4

9/11/1997

Outside Directors Stock Option Plan

91

Exhibit
Number

Exhibit Description

10.13* Amendment No. 1 to Nonstatutory

Stock Option Agreements for Outside
Directors, dated February 20, 2007,
between us and Alan Bickell

Incorporation by Reference

Form
10-K

File
Number
000-23441

Exhibit/
Appendix
Reference
10.35

Filed
Herewith

Filing Date
3/8/2007

10.14* Amendment No. 1 to Nonstatutory

10-K

000-23441

10.36

3/8/2007

Stock Option Agreements for Outside
Directors, dated February 20, 2007,
between us and Nicholas Brathwaite

10.15* Form of Director Option Grant

10-Q

000-23441

10.9

5/6/2009

Agreement.

10.16* Director Equity Compensation

10-K

000-23441

10.36

2/22/2013

Program, as revised in July 2012 and
January 2013

10.17* Forms of Stock Option Agreements to
be used in Director Equity
Compensation Program

10-Q

000-23441

10.5

11/7/2008

10.18* Outside Director Cash Compensation

10-Q

000-23441

10.3

11/3/2010

Arrangements

10.19*

2007 Equity Incentive Plan, as
amended and restated

10-Q

000-23441

10.2

8/7/2012

10.20* Forms of Option Agreements under

the 2007 Equity Incentive Plan

Schedule
TO

000-23441

99.(D)(4)

12/3/2008

10.21* Form of Restricted Stock Unit Grant
Notice and Form of Restricted Stock
Unit Award Agreement under the
2007 Equity Incentive Plan

10-Q

000-23441

10.1

5/6/2010

10.22* Form of Performance Stock Unit

10-K

000-23441

10.29

2/22/2013

Grant Notice and Performance Stock
Unit Agreement (as used after to
January 1, 2013) under the 2007
Equity Incentive Plan

10.23* Form of Long Term Performance
Stock Unit Notice and Agreement
under the 2007 Equity Incentive Plan

10.24* Power Integrations, Inc. 2016
Incentive Award Plan

10.25* Form of restricted Stock Unit Grant

Notice and Agreement under the 2016
Incentive Award Plan

10.26* Form of Performance Stock Unit

Notice and Agreement under the 2007
Equity Incentive Plan

10.27* Form of Long Term Performance
Stock Unit Notice and Agreement
under the 2007 Equity Incentive Plan

10-K

000-23441

10.84

2/10/2015

DEF14A

000-23441 Appendix A 3/25/2016

X

X

X

10.28 Technology License Agreement

10-Q

000-23441

10.28

11/14/2000

between us and Matsushita
Electronics Corporation, dated as of
June 29, 2000

92

Exhibit
Number

Exhibit Description

10.29† Wafer Supply Agreement between us

and ZMD Analog Mixed Signal
Services GmbH & Co. KG, dated as
of May 23, 2003

Incorporation by Reference

File
Number

Exhibit/
Appendix
Reference

Filing Date

Filed
Herewith

000-23441

10.32

8/7/2003

Form

10-Q

10.30† Amended and Restated Wafer Supply

10-Q

000-23441

10.31

8/7/2003

Agreement between us and OKI
Electric Industry Co., Ltd., dated as of
April 1, 2003

10.31† Amendment Number One to the

8-K

000-23441

10.22

4/18/2006

Amended and Restated Wafer Supply
Agreement between us and OKI
Electric Industry Co., Ltd., effective
as of August 11, 2004

10.32 Amendment Number Two to the

10-Q

000-23441

10.5

8/8/2008

Amended and Restated Wafer Supply
Agreement between Power
Integrations International, Ltd. and
OKI Electric Industry Co., Ltd.,
effective as of April 1, 2008

10.33 Amendment Number Three to the

10-Q

000-23441

10.5

8/8/2008

Amended and Restated Wafer Supply
Agreement between Power
Integrations International, Ltd. and
OKI Electric Industry Co., Ltd.,
effective as of June 9, 2008

10.34† Amendment Number Four to the

10-Q

000-23441

10.2

11/7/2008

Amended and Restated Wafer Supply
Agreement between Power
Integrations International, Ltd. and
OKI Electric Industry Co., Ltd., dated
September 15, 2008

10.35† Amendment Number Five to the

10-K

000-23441

10.61

3/2/2009

Amended and Restated Wafer Supply
Agreement between Power
Integrations International, Ltd. and
OKI Semiconductor Co., Ltd.,
effective as of November 14, 2008

10.36† Amendment Number Six to the

10-K

000-23441

10.32

2/11/2016

Amended and Restated Wafer Supply
Agreement between Power
Integrations International, Ltd. and
OKI Semiconductor Co., Ltd.,
effective as of November 1, 2015

10.37† Amendment Number Seven to the

10-Q

000-23441

10.1

11/1/2016

Amended and Restated Wafer Supply
Agreement between Power
Integrations International, Ltd. and
OKI Semiconductor Co., Ltd.,
effective as of August 8, 2016

10.38† Wafer Supply Agreement, between
Seiko Epson Corporation and Power
Integrations International, Ltd.
effective as of April 1, 2005

10-Q

000-23441

10.1

11/7/2008

93

Exhibit
Number

Exhibit Description

10.39† Amendment Number One to the

Wafer Supply Agreement between
Power Integrations International, Ltd.
and Seiko Epson Corporation, with an
effective date of December 19, 2008

10.40† Amendment Number Two to Wafer
Supply Agreement, between Seiko
Epson Corporation and Power
Integrations International, Ltd.,
entered into on January 5, 2011

Incorporation by Reference

Form
10-Q

File
Number
000-23441

Exhibit/
Appendix
Reference
10.1

Filed
Herewith

Filing Date
5/6/2009

10-K

000-23441

10.47

2/25/2011

10.41† Amendment Number Three to Wafer

10-Q

000-23441

10.1

5/8/2012

Supply Agreement, effective as of
February 1, 2012, by Power
Integrations International Ltd. and
Seiko Epson Corporation

10.42† Development Addendum to Wafer

10-Q

000-23441

10.1

11/1/2013

Supply Agreement, dated September
22, 2013, between Seiko Epson
Corporation and Power Integrations
International Ltd

10.43† Amendment Number Four to Wafer

10-K

000-23441

10.38

2/11/2016

Supply Agreement, effective as of
April 1, 2015, by Power Integrations
International Ltd. and Seiko Epson
Corporation

10.44† Amendment Number Five to Wafer

10-K

000-23441

10.39

2/11/2016

Supply Agreement, effective as of
November 2, 2015, by Power
Integrations International Ltd. and
Seiko Epson Corporation

10.45† Amendment Number Six to Wafer
Supply Agreement, effective as of
December 8, 2015, by Power
Integrations International Ltd. and
Seiko Epson Corporation

10.46† Amendment Number Seven to Wafer

Supply Agreement, effective as of
October 3, 2016, by Power
Integrations International Ltd. and
Seiko Epson Corporation

10.47† Amendment Number Eight to Wafer

Supply Agreement, effective as of
November 8, 2016 by Power
Integrations International Ltd. and
Seiko Epson Corporation

10-K

000-23441

10.40

2/11/2016

X

X

10.48† Amendment Number One to the

10-K

000-23441

10.66

2/26/2010

Amended and Restated Wafer Supply
Agreement between Power
Integrations International, Ltd. and
XFAB Dresden GmbH & Co. KG,
effective as of July 20, 2005

94

Exhibit
Number

Exhibit Description

10.49† Wafer Supply Agreement, made and
entered into as of October 1, 2010, by
and between Power Integrations
International, Ltd., and X-FAB
Semiconductor Foundries AG

10.50† Amendment Number One to Wafer
Supply Agreement, effective as of
January 1, 2014, between Power
Integrations International, Ltd., and
X-FAB Semiconductor Foundries AG

Incorporation by Reference

Form
10-Q

File
Number
000-23441

Exhibit/
Appendix
Reference
10.2

Filed
Herewith

Filing Date
5/8/2012

10-Q/A

000-23441

10.2

9/19/2014

10.51 Credit Agreement, dated July 5, 2012,

10-Q

000-23441

10.1

10/31/2012

by and between Power Integrations,
Inc., Union Bank N.A. and Wells
Fargo Bank, National Association

10.52 First Amendment to Credit Agreement

10-K

000-23441

10.61

2/22/2013

dated December 17, 2012, between
Power Integrations, Inc., Union Bank,
N.A. and Wells Fargo Bank, National
Association

10.53 Second Amendment to Credit

10-Q

000-23441

10.1

5/5/2014

Agreement, dated April 1, 2014, by
and between Power Integrations, Inc.,
Union Bank N.A. and Wells Fargo
Bank, National Association

10.54 Credit Agreement, dated July 27,

10-Q

000-23441

10.1

7/29/2016

2016, by and between Power
Integrations Inc. and Wells Fargo
Bank, National Association

10.55*

10.56*

2016 Executive Officer Compensation
Arrangements and 2016 Performance
Based Incentive Plan

2015 Executive Officer Cash
Compensation Arrangements and
2015 Bonus Plan

8-K

000-23441

Item 5.02

2/1/2016

8-K

000-23441

Item 5.02

2/2/2015

10.57* Offer Letter, dated June 23, 2010,

10-Q

000-23441

10.2

8/6/2010

between Power Integrations, Inc. and
Sandeep Nayyar

10.58* Form of Restricted Stock Unit Grant
Notice and Form of Restricted Stock
Unit Award Agreement for executive
officers for use prior to January 2013

10.59* Form of Restricted Stock Unit Grant
Notice and Form of Restricted Stock
Unit Award Agreement for executive
officers for use after January 2013

10-Q

000-23441

10.6

8/6/2010

10-K

000-23441

10.48

2/22/2013

10.60* Amended and Restated Chief

10-Q

000-23441

10.3

5/5/2014

Executive Officer Benefits
Agreement, dated as of May 1, 2014,
between Power Integrations, Inc. and
Balu Balakrishnan

95

Exhibit
Number

Exhibit Description

10.61* Amended and Restated Executive

Officer Benefits Agreement, dated as
of May 1, 2014, between Power
Integrations, Inc. and Cliff Walker

Incorporation by Reference

Form
10-Q

File
Number
000-23441

Exhibit/
Appendix
Reference
10.5

Filed
Herewith

Filing Date
5/5/2014

10.62* Amended and Restated Executive

10-Q

000-23441

10.6

5/5/2014

Officer Benefits Agreement, dated as
of May 1, 2014, between Power
Integrations, Inc. and Doug Bailey

10.63* Amended and Restated Executive

10-Q

000-23441

10.7

5/5/2014

Officer Benefits Agreement, dated as
of May 1, 2014, between Power
Integrations, Inc. and Ben Sutherland

10.64* Amended and Restated Executive

10-Q

000-23441

10.8

5/5/2014

Officer Benefits Agreement, dated as
of May 1, 2014, between Power
Integrations, Inc. and Sandeep Nayyar

10.65* Amended and Restated Executive

10-Q

000-23441

10.10

5/5/2014

Officer Benefits Agreement, dated as
of May 1, 2014, between Power
Integrations, Inc. and Mike Matthews

10.66* Amended and Restated Executive

10-Q

000-23441

10.11

5/5/2014

Officer Benefits Agreement, dated as
of May 1, 2014, between Power
Integrations, Inc. and Radu Barsan

10.67* Executive Officer Benefits

10-Q

000-23441

10.1

7/31/2015

Agreement, dates as of April 23,
2015, between Power Integrations,
Inc. and Raja Petrakian

10.68* Compensation arrangement with Balu

10-Q

000-23441

Balakrishnan

Item 5 
of Part II

5/5/2014

14.1 Code of Business Conduct and Ethics

8-K

000-23441

14.1

2/4/2008

21.1 List of subsidiaries

23.1 Consent of Independent Registered

Public Accounting Firm

24.1 Power of Attorney (See signature

page)

31.1 Certification of Chief Executive

Officer pursuant to Section 302 of the
Sarbanes-Oxley Act of 2002

31.2 Certification of Chief Financial

Officer pursuant to Section 302 of the
Sarbanes-Oxley Act of 2002

32.1** Certification of Chief Executive

Officer pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002

32.2** Certification of Chief Financial

Officer pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002

101.INS XBRL Instance Document

101.SCH XBRL Taxonomy Extension Schema

Document

96

X

X

X

X

X

X

X

X

X

Exhibit
Exhibit Description
Number
101.CAL XBRL Taxonomy Extension

Calculation Linkbase Document

101.DEF XBRL Taxonomy Extension

Definition Linkbase Document

101.LAB XBRL Taxonomy Extension Label

Linkbase Document

101.PRE XBRL Taxonomy Extension

Presentation Linkbase Document

Incorporation by Reference

Form

File
Number

Exhibit/
Appendix
Reference

Filing Date

Filed
Herewith
X

X

X

X

All references in the table above to previously filed documents or descriptions are incorporating those 

documents and descriptions by reference thereto.
_____________ 

†

*

**

This Exhibit has been filed separately with the Commission pursuant to an application for confidential
treatment. The confidential portions of this Exhibit have been omitted and are marked by an asterisk.

Indicates a management contract or compensatory plan or arrangement.

The certifications attached as Exhibits 32.1 and 32.2 accompanying this Form 10-K, are not deemed
filed with the SEC, and are not to be incorporated by reference into any filing of Power Integrations,
Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as
amended, whether made before or after the date of this Form 10-K, irrespective of any general
incorporation language contained in such filing.

97

[THIS PAGE INTENTIONALLY LEFT BLANK]

Board of Directors

(cid:38)(cid:82)(cid:85)(cid:83)(cid:82)(cid:85)(cid:68)(cid:87)(cid:72)(cid:3)(cid:50)(cid:73)(cid:191)(cid:70)(cid:72)(cid:85)(cid:86)

Corporate Information

E. Floyd Kvamme (Chairman)
Partner Emeritus
(cid:46)(cid:79)(cid:72)(cid:76)(cid:81)(cid:72)(cid:85)(cid:15)(cid:3)(cid:51)(cid:72)(cid:85)(cid:78)(cid:76)(cid:81)(cid:86)(cid:15)(cid:3)(cid:38)(cid:68)(cid:88)(cid:191)(cid:72)(cid:79)(cid:71)(cid:3)(cid:9)(cid:3)(cid:37)(cid:92)(cid:72)(cid:85)(cid:86)

Wendy A. Arienzo
Vice President, Operations
FUJIFILM Dimatix, Inc.

(cid:37)(cid:68)(cid:79)(cid:88)(cid:3)(cid:37)(cid:68)(cid:79)(cid:68)(cid:78)(cid:85)(cid:76)(cid:86)(cid:75)(cid:81)(cid:68)(cid:81)
(cid:51)(cid:85)(cid:72)(cid:86)(cid:76)(cid:71)(cid:72)(cid:81)(cid:87)(cid:3)(cid:68)(cid:81)(cid:71)(cid:3)(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:40)(cid:91)(cid:72)(cid:70)(cid:88)(cid:87)(cid:76)(cid:89)(cid:72)(cid:3)(cid:50)(cid:73)(cid:191)(cid:70)(cid:72)(cid:85)
Power Integrations, Inc.

(cid:36)(cid:79)(cid:68)(cid:81)(cid:3)(cid:39)(cid:17)(cid:3)(cid:37)(cid:76)(cid:70)(cid:78)(cid:72)(cid:79)(cid:79)
Former Senior Vice President
Hewlett-Packard Co., Retired

(cid:49)(cid:76)(cid:70)(cid:75)(cid:82)(cid:79)(cid:68)(cid:86)(cid:3)(cid:40)(cid:17)(cid:3)(cid:37)(cid:85)(cid:68)(cid:87)(cid:75)(cid:90)(cid:68)(cid:76)(cid:87)(cid:72)
Partner, Riverwood Capital LLC

William L. George
Former Executive Vice President
ON Semiconductor Corp., Retired

(cid:37)(cid:68)(cid:79)(cid:68)(cid:78)(cid:85)(cid:76)(cid:86)(cid:75)(cid:81)(cid:68)(cid:81)(cid:3)(cid:54)(cid:17)(cid:3)(cid:44)(cid:92)(cid:72)(cid:85)
Former Senior Vice President and
(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:41)(cid:76)(cid:81)(cid:68)(cid:81)(cid:70)(cid:76)(cid:68)(cid:79)(cid:3)(cid:50)(cid:73)(cid:191)(cid:70)(cid:72)(cid:85)
Conexant Systems, Inc., Retired

(cid:37)(cid:68)(cid:79)(cid:88)(cid:3)(cid:37)(cid:68)(cid:79)(cid:68)(cid:78)(cid:85)(cid:76)(cid:86)(cid:75)(cid:81)(cid:68)(cid:81)
President and
(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:40)(cid:91)(cid:72)(cid:70)(cid:88)(cid:87)(cid:76)(cid:89)(cid:72)(cid:3)(cid:50)(cid:73)(cid:191)(cid:70)(cid:72)(cid:85)

Corporate Counsel
Cooley LLP
Palo Alto, CA

(cid:39)(cid:82)(cid:88)(cid:74)(cid:3)(cid:37)(cid:68)(cid:76)(cid:79)(cid:72)(cid:92)
Vice President,
Marketing

(cid:53)(cid:68)(cid:71)(cid:88)(cid:3)(cid:37)(cid:68)(cid:85)(cid:86)(cid:68)(cid:81)
Vice President,
Technology

Mike Matthews
Vice President,
Product Development

Sandeep Nayyar
Vice President, Finance
(cid:38)(cid:75)(cid:76)(cid:72)(cid:73)(cid:3)(cid:41)(cid:76)(cid:81)(cid:68)(cid:81)(cid:70)(cid:76)(cid:68)(cid:79)(cid:3)(cid:50)(cid:73)(cid:191)(cid:70)(cid:72)(cid:85)

Raja Petrakian
Vice President,
Operations

(cid:37)(cid:72)(cid:81)(cid:3)(cid:54)(cid:88)(cid:87)(cid:75)(cid:72)(cid:85)(cid:79)(cid:68)(cid:81)(cid:71)
Vice President,
Worldwide Sales

Transfer Agent
Computershare
(cid:51)(cid:17)(cid:50)(cid:17)(cid:3)(cid:37)(cid:82)(cid:91)(cid:3)(cid:22)(cid:19)(cid:20)(cid:26)(cid:19)
(cid:38)(cid:82)(cid:79)(cid:79)(cid:72)(cid:74)(cid:72)(cid:3)(cid:54)(cid:87)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:15)(cid:3)(cid:55)(cid:59)(cid:3)(cid:26)(cid:26)(cid:27)(cid:23)(cid:21)(cid:16)(cid:22)(cid:20)(cid:26)(cid:19)

Independent Auditors
(cid:39)(cid:72)(cid:79)(cid:82)(cid:76)(cid:87)(cid:87)(cid:72)(cid:3)(cid:9)(cid:3)(cid:55)(cid:82)(cid:88)(cid:70)(cid:75)(cid:72)(cid:3)(cid:47)(cid:47)(cid:51)
San Jose, CA

Investor Information
For additional information about
Power Integrations,
visit our website at:
www.power.com

write to:
Investor Relations Department
Power Integrations, Inc.
(cid:24)(cid:21)(cid:23)(cid:24)(cid:3)(cid:43)(cid:72)(cid:79)(cid:79)(cid:92)(cid:72)(cid:85)(cid:3)(cid:36)(cid:89)(cid:72)(cid:81)(cid:88)(cid:72)
(cid:54)(cid:68)(cid:81)(cid:3)(cid:45)(cid:82)(cid:86)(cid:72)(cid:15)(cid:3)(cid:38)(cid:36)(cid:3)(cid:28)(cid:24)(cid:20)(cid:22)(cid:27)

or email:
ir@power.com

Steven J. Sharp
Former Chairman and CEO
TriQuint Semiconductor, Inc., Retired

Clifford J. Walker
Vice President,
Corporate Development

Power Integrations, Inc.(cid:3)(cid:24)(cid:21)(cid:23)(cid:24)(cid:3)(cid:43)(cid:72)(cid:79)(cid:79)(cid:92)(cid:72)(cid:85)(cid:3)(cid:36)(cid:89)(cid:72)(cid:81)(cid:88)(cid:72)(cid:15)(cid:3)(cid:54)(cid:68)(cid:81)(cid:3)(cid:45)(cid:82)(cid:86)(cid:72)(cid:15)(cid:3)(cid:38)(cid:36)(cid:3)(cid:28)(cid:24)(cid:20)(cid:22)(cid:27)(cid:3)www.power.com
(cid:139)(cid:21)(cid:19)(cid:20)(cid:26)(cid:3)(cid:51)(cid:82)(cid:90)(cid:72)(cid:85)(cid:3)(cid:44)(cid:81)(cid:87)(cid:72)(cid:74)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:86)(cid:17)(cid:3)(cid:51)(cid:82)(cid:90)(cid:72)(cid:85)(cid:3)(cid:44)(cid:81)(cid:87)(cid:72)(cid:74)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:86)(cid:3)(cid:68)(cid:81)(cid:71)(cid:3)(cid:87)(cid:75)(cid:72)(cid:3)(cid:51)(cid:82)(cid:90)(cid:72)(cid:85)(cid:3)(cid:44)(cid:81)(cid:87)(cid:72)(cid:74)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:86)(cid:3)(cid:79)(cid:82)(cid:74)(cid:82)(cid:3)(cid:68)(cid:85)(cid:72)(cid:3)(cid:85)(cid:72)(cid:74)(cid:76)(cid:86)(cid:87)(cid:72)(cid:85)(cid:72)(cid:71)(cid:3)(cid:87)(cid:85)(cid:68)(cid:71)(cid:72)(cid:80)(cid:68)(cid:85)(cid:78)(cid:86)(cid:3)(cid:82)(cid:73)(cid:3)(cid:51)(cid:82)(cid:90)(cid:72)(cid:85)(cid:3)(cid:44)(cid:81)(cid:87)(cid:72)(cid:74)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:86)(cid:15) (cid:44)(cid:81)(cid:70)(cid:17)(cid:3)(cid:36)(cid:79)(cid:79)(cid:3)(cid:85)(cid:76)(cid:74)(cid:75)(cid:87)(cid:86)(cid:3)(cid:85)(cid:72)(cid:86)(cid:72)(cid:85)(cid:89)(cid:72)(cid:71)(cid:17)