IGBT Driver problem

Thread Starter


Joined Jul 4, 2008

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



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.