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UCC28740: Transformer Choice for this flyback

Part Number: UCC28740
Other Parts Discussed in Thread: TIDA-01505, PMP41009


I need some help here with the choice of transformer I can use for this flyback converter (UCC28740) that can be able to step the input voltage to 15V, 2A and an input voltage of 1kV. WEBENCH gave me this transformer.

I'm wondering if my design would produce the same results if I used any of these transformers (ZB1432-CL) or (WA8759). 

Please advise if there are any alternative transformers I can use apart from the one I specified.



  • Hi Ikenna,

    Thank you for the query.

    You can refer TIDA-01505 which uses WA8759 transformer and the design guide which takes you through the calculations. You can use this as long as your minimum voltage is also having similar specifications.

    As this high is input voltage, we only have limited designs for this voltage level. You can also refer to PMP41009. We do not have any ready alternative.

    You might have to reach out to wurth, Renco or coilcraft to have this custom transformer built for the application.