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Suitable IC for 3.3V, 3A output

Other Parts Discussed in Thread: TL431


I would like to choose an  isolated AC/DC flyback controller IC which would be best suitable to get 3.3V, and up to 3A output. It should be low cost (<0.5$)as it will be used in mass production.

First, I was looking at UCC28702, but is it suibale for 3.3V, 3A ? The WEBENCH doesn't allow to choose output voltages lower than 5V with UCC28702.... Why?

I will be grateful if you can answer my question.