Tool/software:
Hi,
I would like to ask about EMI tests. I have cca 100W flyback without pfc, with UCC28C54 and Synchronious rectifier. Switching frequency cca 95 kHz. I tried to handle peaks caused by switching frequency by dumping the filter, but without change. So it looks like I have to make better differential mode filter.
Do you think that better differential mode filter will effect the peaks up to 30 MHz ? Or it will effect peaks only up to certain frequency, for ex. 10 MHz ? I want to know if only the improvement of differential filter can handle the requirements, or even common mode filter needs to be improved.
Or any another ideas to meet EMC requirements ?
Thanks a lot.