POWER INTEGRATIONS INC — Director's Dealing 2011

Apr 28, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: POWER INTEGRATIONS INC (POWI)
CIK: 0000833640
Period of Report: 2011-04-26

Reporting Person: Bell Derek (VP of Engineering)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-04-26	Common Stock	M	3438	$18.95	Acquired	18202	Direct
2011-04-26	Common Stock	S	3438	$39.9	Disposed	14764	Direct
2011-04-26	Common Stock	M	1003	$17.18	Acquired	15767	Direct
2011-04-26	Common Stock	S	1003	$39.9	Disposed	14764	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-04-26	Non-Qualified Stock Option (right to buy)	$17.18	M	1003	Disposed	2015-01-24	Common Stock (1003)	Direct
2011-04-26	Non-Qualified Stock Option (right to buy)	$18.95	M	3438	Disposed	2013-01-08	Common Stock (3438)	Direct

Footnotes

F1: This sale is pursuant to a 10B5-1 Sales Plan