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UCC2817A: Replacement of UCC3817A without any compromise on performance

Part Number: UCC2817A

Hi,

I have designed the PFC stage using UCC3817AD and want to replace it with UCC2817AD as the ambient temperature around the IC is more than 70C. Have already completed all the design evaluation and testing and is ready for release, so is using a UCC2817AD is direct drop in replacement for UCC3817AD for higher temperatures without any changes on the performance of the PFC?

Regards,

Nitish