POWER INTEGRATIONS INC — Director's Dealing 2012

May 10, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: POWER INTEGRATIONS INC (POWI)
CIK: 0000833640
Period of Report: 2012-05-08

Reporting Person: BALAKRISHNAN BALU (President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-08	Common Stock	A	25000	—	Acquired	70077	Direct
2012-05-08	Common Stock	S	2355	$41.383	Disposed	67722	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-08	Incentive Stock Option (right to buy)	$42.88	A	2332	Acquired	2022-05-08	Common Stock (2332)	Direct
2012-05-08	Non-Qualified Stock Option (right to buy)	$42.88	A	47668	Acquired	2022-05-08	Common Stock (47668)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	251579	Indirect