Power management forum

Hello,

We designed  an active clamp isolated DC-DC converter using UCC2897A PWM Controller.

 Converter designed for Fsw : 400 kHz, but we got  two different Fsw  : 400 kHz and 750 KHz at the pin_12 (OUT) of the controller.

I attached captured waveform at pin_12 (OUT) and schematic diagram.

Thanks

AM

 page6 _ Controller_FB.pdf