Regarding the UC28025, we are experiencing cases where Output A starts sooner than Output B at power up, as much as 400 us sooner. This causes transformer problems and the transistors fail. Does anyone know why one output might start sooner than the other? We have tried to hold SD high, and hold the SS low for a long time even after the power supplies come up, and the Output A still starts sooner than Output B. any ideas would be appreciated. thanks.