Conducted Emissions Related Failure in BOOST Circuit

A

Thread Starter

Arav J.

I'm encountering a conducted emissions failure in the switching frequency of my circuit.

Does anyone have experience with these types of issues?
 
I'm encountering a conducted emissions failure in the switching frequency of my circuit.

Does anyone have experience with these types of issues?
Hi Arav,
That is a very general description of a problem. We will need some more information to get started.
1. What is the switching frequency of your PFC converter?
2. operating mode on CCM or BCM?
3. where are the over limit peaks? And by how much?
 
I'm willing to bet that most issues regarding conducted emissions find their way back to a problematic grounding method.

Do your filters have a ground choke?
 
It could be that you're not seeing these common mode emissions because of the way your heatsink and grounding arrangements are placed. These might be dominating the DM noise in the LISN.
 
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