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UCC28740: AC noise coupling

Part Number: UCC28740

Hi Team,

My customer is using UCC28740 for AC-DC adapter.

The topology is 110Vrms to full bridge AC-DC and flyback to generate 12Vout.

But now they have the issue about Vout drop when Vin = 110Vrms is affected by noise.

Do we have any solution from output side to maintain 12V and not affected by AC noise?

Regards,

Roy