IGBT Driver problem

Discussion in 'The Projects Forum' started by asimraufawan, Jun 2, 2009.

  1. asimraufawan

    Thread Starter Member

    Jul 4, 2008
    29
    0
    Hi,

    I m designing an inverter by using four H bridges the IGBT driver i m using is PSHI 2012 m facing some problem regarding its interfacing with a control card.
    The IGBT driver has the following inputs,
    1. V Bot
    2. Error
    3. V Top
    4. VS=15 V
    5. Gnd

    & at the output it drives a half bridge for Top & Bottom
    the driver datasheet says when the logic is low at the input
    the gate voltage is -8 but when it goes high the gate voltage will be +15v
    but the problem is when i provide the input the gate is always in turn off
    state even i have checked my signals at the input side for V Top & V Bot
    are ok.
    Kindly help me out
    attached is the datasheet 4 driver

    thanks
     
  2. franzschluter

    Active Member

    Jun 1, 2009
    95
    0
    Could you post a schematic of your connection?

    It in the datasheet it says that its gate signal can be blocked depending on the "Vce Monitoring Circuit". I think this is your error pin. So this has to be utilized or bypassed or your signal might get blocked.

    Regards
    Franz
     
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