X0201 4 2003-11-24 0 0000833640 POWER INTEGRATIONS INC POWI 0001182405 BALAKRISHNAN BALU 5245 HELLYER AVE SAN JOSE CA 95138 0 1 0 0 President and CEO Common Stock 2003-11-24 4 M 0 878 14.2188 A 233630 I by Trust Common Stock 2003-11-24 4 S 0 878 34.79 D 232752 I by Trust Common Stock 2003-11-24 4 M 0 122 14.2188 A 232874 I by Trust Common Stock 2003-11-24 4 S 0 122 34.82 D 232752 I by Trust Non-Qualified Stock Option (right to buy) 14.2188 2003-11-24 4 M 0 878 34.79 D 1999-04-20 2009-04-20 Common Stock 878 63122 I by Trust Non-Qualified Stock Option (right to buy) 14.2188 2003-11-24 4 M 0 122 34.82 D 1999-04-20 2009-04-20 Common Stock 122 63000 I by Trust By: Robert Lelieur Attorney-In-Fact For: Balu Balakrishnan 2003-11-24