PWM Point of Clarification

[Stephen Darbey]

Hi Everyone.

I recently had an issue with my PWM signals not arriving at my gate driver pcbs. As it turned out the problem was self inflicted in that I had reversed a component. Going forward I have attached my gate drivers and I have perfect outputs on GTop and GBot but spurious looking signals on ETop and EBot. Do I ignore this or should I have similar signals on the E outputs.? Maybe somebody can clear this up for me as I don't want to mess up again.

Regards
Stephen

[johu]

EBot should be plain DC as it's connected to HV ground. ETop will swing at your DC voltage. Provided there is a DC voltage.

If your measure Gx vs. Ex they should look exactly the same.