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TL2845B: topology supported by TL2845B

Part Number: TL2845B
Other Parts Discussed in Thread: UC2845,

Hi expert,

I want to promote TL2845B to replace UC2845.

But I found   TL2845B only supports flyback and boost, while UC2845 also supports buck and forward.

Could you kindly tell me the reason? since they seem to have very similar structure.

BR

Emma