2016-04-21 01:26 PM
Hello,
I am testing the L5491 Evaluation board and having problems getting the IGBTs to turn on. Currently I am using FGH60N60 IGBTs for controlling a light bulb. I have a microcontroller generating a 1kHz 5Vpp square wave and 4N25 optocoupler for isolation from high voltage. Here is an attached picture and schematic of my setup. I am sure there is something very obviously missing and/or wrong about the setup. Hopefully you guys can point me in the right direction. Thanks, Eric