POWER INTEGRATIONS INC — Director's Dealing 2011

Jan 31, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: POWER INTEGRATIONS INC (POWI)
CIK: 0000833640
Period of Report: 2011-01-27

Reporting Person: BALAKRISHNAN BALU (President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-01-27	Common Stock	M	925	$14.82	Acquired	237111	Indirect
2011-01-27	Common Stock	S	925	$37.50	Disposed	236186	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-01-27	Non-Qualified Stock Option (right to buy)	$14.82	M	925	Disposed	2012-02-21	Common Stock (925)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	41000	Direct

Footnotes

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