FGA25N120 IGBT, 1200v datasheet rating (for switching a motor @90v dc)

Discussion in 'General Electronics Chat' started by Hamlet, May 2, 2018.

  1. Hamlet

    Thread Starter Member

    Jun 10, 2015
    212
    5
    Sorry, no schematic, I'm contemplating switching a 90v, 3A DC motor.
    I have a FGA25N120 IGBT, which I thought was the choice, but
    now I'm not sure...

    Is this part okay, or recommendations?
     
  2. ericgibbs

    Moderator

    Jan 29, 2010
    5,474
    1,023
    hi H,
    Here is the datasheet.
    A schematic would help.
    E
     
  3. Hamlet

    Thread Starter Member

    Jun 10, 2015
    212
    5
    I've read a million datasheets, but I've lost confidence what I'm looking at.
    I thought I would make a simple switch with an IGBT, since they're the greatest
    thing since sliced bread.

    Um, okay, I found it, the graph all the way down, page 5,
    SOA Characteristics:

    And it won't let me copy and past it. Anyway, at 1200v, it will
    switch .01A, and at 10v maybe 30A, continuous. And 90v?
    Perhaps 3.5A.

    Too close for comfort.
     
  4. Bordodynov

    Well-Known Member

    May 20, 2015
    1,816
    547
    You can of course use this transistor, but the dissipated power on the transistor will be approx. 5 watts. If you apply the MOS transistor, then you can dissipate a transistor less than a fraction of a watt (for example: P=Ron*Id=10mOhm*3A=30 mW). Do not forget to shunt the motor in parallel with a diode, or even your transistor will break.
     
  5. ericgibbs

    Moderator

    Jan 29, 2010
    5,474
    1,023
    hi H,
    Did you see the Vgs threshold voltage for that MOSFET.?
    How do you plan to drive the Gate.?
    E
    BTW:
    Download ScreenHunter 6, free.
    Copy any screen area as an image, paste image as required.
     
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