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TPS25810: Lower EMI with Capacitors on CC1 and CC2

Part Number: TPS25810

Tool/software:

Hello,

We're using the TPS25810 in a charging application.

What we're finding during EMI testing is the performance is much better when adding 1000pF caps from CC1 and CC2 to ground.

Could you please help explain why this is the case?

Before 

After

Thank you, Keith