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Hi Deepak,
We do not sell UCC2570 now, you can use UCC25701/2 as a replacement, it has advanced features than UCC2570.
But please note that they are not pin-to-pin compatible, it must redesign the circuit.
Regards,
Teng
Sam,
I've used the UCC25701 in a AC DC forward. It can be used in a buck converter topology. The chip has a built in feed forward circuit and volt -sec clamp. The built in feedforward provides excellent line rejection -just as good as current mode control…
