Pay vs Performance Disclosure - USD ($)

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table

The following table sets forth the CAP to our PEO and average of our Non-PEO NEOs, serving in such capacity, along with certain measures of Company performance in each of the four years ended December 31, 2023, December 31, 2022, December 31, 2021 and December 31, 2020:

	Summary				Average Summary		Average		Value of Initial Fixed
	Compensation		Compensation		Compensation		Compensation		$100 Investment Based on
	Table		Actually Paid		Table Total for		Actually Paid		Total Shareholder		Peer Group
	Total		to the		Non-PEO		to Non-PEO		Return		Total Shareholder		(in thousands)
Year	for PEO		PEO (1) (2)		NEOs		NEOs (1) (3)		(TSR) - POWI		Return (4)		Net Income		Net Revenues
2023	$	8,218,982	$	6,836,603	$	2,503,959	$	2,415,342	$	171.35	$	238.72	$	55,735	$	444,538
2022	$	7,015,329	$	(13,137,041)	$	1,737,581	$	(725,064)	$	148.28	$	142.94	$	170,851	$	651,138
2021	$	6,564,685	$	16,724,842	$	1,784,763	$	3,351,766	$	190.35	$	219.51	$	164,413	$	703,277
2020	$	5,733,115	$	23,622,794	$	1,514,513	$	4,824,198	$	166.78	$	153.66	$	71,176	$	488,318

(1) See supplemental disclosures below for adjustments made to arrive at CAP for PEO and Non-PEO NEOs.

(2) For fiscal years 2023, 2022, 2021 and 2020, Balu Balakrishnan served as our President and Chief Executive officer.

(3) For fiscal years 2023, Non-PEO NEOs were Sandeep Nayyar, Radu Barsan, Sunil Gupta and Yang Chiah Yee. For fiscal 2022 and 2021, Non-PEO NEOs were Sandeep Nayyar, Radu Barsan, Mike Matthews and Yang Chiah Yee. For fiscal year 2020, Non-PEO NEOs were Sandeep Nayyar, Radu Barsan, Mike Matthews and Ben Sutherland.

(4) Peer Group TSR is based on Philadelphia Stock Exchange Semiconductor Sector Index (SOX) (the “Industry Index”). SOX is a market cap weighted index of 30 US-listed semiconductor companies.

Company Selected Measure Name

Net Revenues

Named Executive Officers, Footnote

(2) For fiscal years 2023, 2022, 2021 and 2020, Balu Balakrishnan served as our President and Chief Executive officer.

(3) For fiscal years 2023, Non-PEO NEOs were Sandeep Nayyar, Radu Barsan, Sunil Gupta and Yang Chiah Yee. For fiscal 2022 and 2021, Non-PEO NEOs were Sandeep Nayyar, Radu Barsan, Mike Matthews and Yang Chiah Yee. For fiscal year 2020, Non-PEO NEOs were Sandeep Nayyar, Radu Barsan, Mike Matthews and Ben Sutherland.

Peer Group Issuers, Footnote

(4) Peer Group TSR is based on Philadelphia Stock Exchange Semiconductor Sector Index (SOX) (the “Industry Index”). SOX is a market cap weighted index of 30 US-listed semiconductor companies.

PEO Total Compensation Amount

$ 8,218,982

$ 7,015,329

$ 6,564,685

$ 5,733,115

PEO Actually Paid Compensation Amount

$ 6,836,603

(13,137,041)

16,724,842

23,622,794

Adjustment To PEO Compensation, Footnote

The below table shows the reconciliation between amounts reported in the Summary Compensation Table to arrive at CAP for our PEO.

	Summary		Exclusion of		Exclusion of		Inclusion of		Inclusion of		Compensation
	Compensation		Change in		Stock		Pension Service		Equity		Actually
	Table Total for		Pension Value for		Awards for		Cost for		Values for		Paid to
Year	PEO		PEO		PEO		PEO		PEO (1)		PEO
2023	$	8,218,982		—	$	7,497,159		—	$	6,114,780	$	6,836,603
2022	$	7,015,329		—	$	6,310,294		—	$	(13,842,076)	$	(13,137,041)
2021	$	6,564,685		—	$	5,890,071		—	$	16,050,228	$	16,724,842
2020	$	5,733,115		—	$	5,080,867		—	$	22,970,546	$	23,622,794

(1) As calculated in table below for Total – Inclusion of Equity Values PEO.

The below table shows the changes in fair value of equity awards as reported in Inclusion of Equity Values for our PEO above.

							Fair Value at
	Fair Value of		Change in Value		Change in Value		Last Day of		Total -
	Unvested Current Year		of Prior Year Awards		of Unvested Equity		Prior Year for Awards		Inclusion
	Awards at FYE		Vesting During the Year		from Prior Years		forfeited during FYE		of Equity Values
Year	PEO		PEO		PEO		PEO		PEO
2023	$	3,894,839	$	1,295,231	$	924,710		—	$	6,114,780
2022	$	2,954,864	$	(1,405,458)	$	(8,508,705)	$	(6,882,777)	$	(13,842,076)
2021	$	10,403,680	$	936,780	$	4,709,768		—	$	16,050,228
2020	$	13,261,320	$	204,564	$	9,504,662		—	$	22,970,546

Non-PEO NEO Average Total Compensation Amount

$ 2,503,959

1,737,581

1,784,763

1,514,513

Non-PEO NEO Average Compensation Actually Paid Amount

$ 2,415,342

(725,064)

3,351,766

4,824,198

Adjustment to Non-PEO NEO Compensation Footnote

The below table shows the reconciliation between amounts reported in the Summary Compensation Table to arrive at CAP on average for our Non-PEO NEOs.

	Average		Average		Average		Average		Average		Average
	Summary		Exclusion of		Exclusion of		Inclusion of		Inclusion of		Compensation
	Compensation		Change in		Stock		Pension Service		Equity		Actually
	Table Total		Pension Value for		Awards for		Cost for		Values for		Paid to
Year	Non-PEO NEOs		Non-PEO NEOs		Non-PEO NEOs		Non-PEO NEOs		Non-PEO NEOs (1)		Non-PEO NEOs
2023	$	2,503,959		—	$	2,080,893		—	$	1,992,276	$	2,415,342
2022	$	1,737,581		—	$	1,325,853		—	$	(1,136,792)	$	(725,064)
2021	$	1,784,763		—	$	1,415,573		—	$	2,982,576	$	3,351,766
2020	$	1,514,513		—	$	1,145,772		—	$	4,455,457	$	4,824,198

(1) As calculated in table below for Total - Average Inclusion of Equity Values Non-PEO NEOs.

The below table shows the changes in fair value of equity as reported in Average Inclusion of Equity Values for Non-PEO NEOs above.

							Average
	Average		Average		Average		Fair Value at
	Fair Value of		Change in Value		Change in Value		Last Day of		Total -
	Unvested Current Year		of Prior Year Awards		of Unvested Equity		Prior Year for Awards		Average Inclusion
	Awards at FYE		Vesting During the Year		from Prior Years		forfeited during FYE		of Equity Values
Year	Non-PEO NEOs		Non-PEO NEOs		Non-PEO NEOs		Non-PEO NEOs		Non-PEO NEOs
2023	$	1,539,065	$	244,169	$	209,042		—	$	1,992,276
2022	$	871,398	$	(272,164)	$	(1,141,604)	$	(594,422)	$	(1,136,792)
2021	$	2,148,662	$	153,008	$	680,906		—	$	2,982,576
2020	$	2,627,706	$	48,406	$	1,779,345		—	$	4,455,457

Equity Valuation Assumption Difference, Footnote

The fair value of our equity awards is determined in accordance with the provisions of ASC 718-10, Stock Compensation. Time-vested restricted stock unit grant date fair values are calculated using the stock price as of date of grant. Adjustments have been made using the stock price as of year end and as of each date of vest to reflect the change in fair value. Performance-based restricted stock unit grant date fair values are calculated using the stock price as of date of grant assuming target performance. Adjustments have been made using the stock price and performance expectations as of year end and as of the date of vest to reflect the change in fair value.

Compensation Actually Paid vs. Total Shareholder Return

The following graph shows the relationship between CAP and TSR for both the Company and Industry Index, as represented by the Philadelphia Stock Exchange Semiconductor Sector Index. TSR shows the cumulative total return on an investment of $100 in cash on December 31, 2019, through December 31, 2023, in our common stock and the Industry Index, assuming that all dividends were reinvested. The 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.

Compensation Actually Paid vs. Net Income

The following graph shows the relationship between CAP and Net Income:

Compensation Actually Paid vs. Company Selected Measure

The following graph shows the relationship between CAP and Net Revenues:

Total Shareholder Return Vs Peer Group

The following graph shows the relationship between CAP and TSR for both the Company and Industry Index, as represented by the Philadelphia Stock Exchange Semiconductor Sector Index. TSR shows the cumulative total return on an investment of $100 in cash on December 31, 2019, through December 31, 2023, in our common stock and the Industry Index, assuming that all dividends were reinvested. The 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.

Tabular List, Table

The following are the Company’s three most important performance measures for determining NEO compensation for 2023:

2023 Performance Measures

Net Revenues

Non-GAAP Operating Income

Relative Revenue ⁽¹⁾

(1) Relative Revenue refers to the Company’s Revenue CAGRs as compared to the Revenue CAGR of the analog semiconductor industry over similar periods. See section “Mechanics of 2023 Performance-based Equity Incentive Awards” above for further details.

Total Shareholder Return Amount

$ 171.35

148.28

190.35

166.78

Peer Group Total Shareholder Return Amount

238.72

142.94

219.51

153.66

Net Income (Loss)

$ 55,735,000

$ 170,851,000

$ 164,413,000

$ 71,176,000

Company Selected Measure Amount

444,538,000

651,138,000

703,277,000

488,318,000

PEO Name

Balu Balakrishnan

Measure:: 1

Pay vs Performance Disclosure

Name

Net Revenues

Measure:: 2

Pay vs Performance Disclosure

Name

Non-GAAP Operating Income

Measure:: 3

Pay vs Performance Disclosure

Name

Relative Revenue

PEO | Exclusion of Stock Awards

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ (7,497,159)

$ (6,310,294)

$ (5,890,071)

$ (5,080,867)

PEO | Inclusion of Equity Values

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

6,114,780

(13,842,076)

16,050,228

22,970,546

PEO | Fair Value of Unvested Current Year Awards at FYE

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

3,894,839

2,954,864

10,403,680

13,261,320

PEO | Change in Value of Prior Year Awards Vesting During the Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

1,295,231

(1,405,458)

936,780

204,564

PEO | Change in Value of Unvested Equity from Prior Years

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

924,710

(8,508,705)

4,709,768

9,504,662

PEO | Fair Value at Last Day of Prior Year for Awards forfeited during FYE

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(6,882,777)

Non-PEO NEO | Exclusion of Stock Awards

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(2,080,893)

(1,325,853)

(1,415,573)

(1,145,772)

Non-PEO NEO | Inclusion of Equity Values

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

1,992,276

(1,136,792)

2,982,576

4,455,457

Non-PEO NEO | Fair Value of Unvested Current Year Awards at FYE

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

1,539,065

871,398

2,148,662

2,627,706

Non-PEO NEO | Change in Value of Prior Year Awards Vesting During the Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

244,169

(272,164)

153,008

48,406

Non-PEO NEO | Change in Value of Unvested Equity from Prior Years

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ 209,042

(1,141,604)

$ 680,906

$ 1,779,345

Non-PEO NEO | Fair Value at Last Day of Prior Year for Awards forfeited during FYE

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ (594,422)