Hello Community,
is the first time I write in a forum and I hope no make too many mistakes, in any case I'm sorry in advance. To enter the question, we are trying to filter a PFC of 700W 90-230Vac and we have noise conducted in the band from 15MHz to 25MHz. The controller is UCC2818D, the Boost mosfet is IXFH36N60P and the diode is 15ETH06FP. We have had some improvement with a couple of 4n7 film capacitor: one from + bridge diode to mosfet source and the other from anode booster diode to mosfet source, but there are again noise up the norma level. I have seen in a techical paper that could be improvement in high frequency using a RC snubber in the mosfet gate, in parallel to gate-source. Have someone some idea about this possibility? And how to dimension the componets? I imagine I'll give a take with the power dissipated in the mosfet.
Thank you for the help.
Bets regards
Tarcisio
