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LM5025A: Conducted Emission on supply line

Part Number: LM5025A

Tool/software:

We use the LM5025A since many years in different designs but always the same schematic.

On our newest PCB we see massive problems on the conducted emission measurement (IACS EMC2) of the 24V supply line. The peaks are clearly the ~300kHz (and multiples) of the LM5025A.

Do you have any ideas on how to reduce that peaks? We haven't seen that on any other design before.

I can send you our schematic as EMail.