SG3525 Push-Pull DC24V to DC320V for IRG4PC50FD

Discussion in 'The Projects Forum' started by laco, Feb 6, 2013.

  1. laco

    Thread Starter New Member

    Aug 29, 2010
    Need comments and sugestion for my projects SG3525 Push-Pull converter inputs DC24V and DC320V with 25/30A outputs.
    This converter driving True Sine Wave Inverter with ATMEGA16/32, 2 x IR2110 and 4 x IRG4PC50FD (AC 240V 25/30A)

    Need your comment or suggestion that I have used enough 12 x IRFPS3810 in SG3525 PUSH-PULL converter.

    Need asistance for output transformer primar/seconda number of wire and wire SWG. Which transformer cores may be use.
  2. bountyhunter

    Well-Known Member

    Sep 7, 2009
    If you are saying the input voltage to the push-pull is either 24V or 320V, I think you have a big problem. I designed several push-pull converters and one thing to always remember is the switch FETs need a standoff voltage rating of at least 3X the input voltage. When the transistors switch, the off FET gets hit with double the supply voltage plus whatever switching spike transients happen. I used to use transistors rated 4X supply voltage to be safe. With an input voltage of 320V, a push-pull converter is not feasible. You should use a half bridge.