I am designing an isolated DC-DC converter with an input of 12V and an output of 5V@12A, at the moment, a flyback seems like the best option. I have read several books regarding the subject and I am proceeding to the implementation; however, I haven't been able to find a transformer that meets my requirements (I have searched on Mouser, Digikey and Newark to no avail). I suppose I've been searching incorrectly, since most of the transformers I have found can only manage up to 2A. I currently have no limitation regarding frequency or turns, but I would like to find the perfect match. So, where can I get the transformer I need? (Do have in mind that I require a website that can ship to Mexico)
Answer
Sourcing a transformer a major challenge/headache during the design of an isolated power supply. The more power is required, the harder it is to find an off-the-shelf magnetic. Majority of the power supply transformers are batch-built.
Usually magnetics manufacturers' web sites have better search/filtering tools than distributors like DigiKey and Mouser. Here are my go-to places for shopping for off-the-shelf magnetics:
Lead times may be long too.
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