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Thread: New guy here(first SMPS build)

  1. #61
    Is a gate drive transformer required when say an ir2153 is driving a half bridge and the driver circuit and the half bridge both have the same power source?

  2. #62
    Any topology with a high side n channel FET or NPN transistor will need either a GDT or a charge pump high side driver IC as the gate needs to be pulled higher than the input voltage to turn it on hard.

    That IC has a high side driver in it, so doesn't require a GDT.
    Last edited by KX36; 05-05-2014 at 01:41 PM.

  3. #63
    I'm not so sure I understand that, the data sheets always say 20 volts or so max gate to emitter voltage, or does that mean 20 volts over collector voltage max?

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