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  • Users: JJMI
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  1. JJMI

    Transformer for SMPS

    I have tried to make a transformer for my SMPS for a while, but all of these tend to saturate. I saw my distributor carries standard toroid transformers for the use with 115 or 230 VAC. I was wondering if I could use a 50VA backwards, of course with the proper winding ratio. If I could do...
  2. JJMI

    DC-DC converter issue

    A few days ago, the MOSFET (an IRF1407) blew. I saw its temperature was up near 260 F. Oops. It was driving a home-made transformer (a toroid inductor with another wind for the secondary) that has a resistance of .005 ohms, while the IRF1407 has a RDS(on) of .0078. The question I have is...

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