POWER INTEGRATIONS INC — Director's Dealing 2010

Sep 29, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: POWER INTEGRATIONS INC (POWI)
CIK: 0000833640
Period of Report: 2010-09-27

Reporting Person: BALAKRISHNAN BALU (President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-09-27	Common Stock	M	2000	$12.10	Acquired	225448	Indirect
2010-09-27	Common Stock	S	2000	$32.61	Disposed	223448	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-09-27	Non-Qualified Stock Option (right to buy)	$12.10	M	2000	Disposed	2011-05-31	Common Stock (2000)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	25000	Direct

Footnotes

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