When my high side FET transitions off, during the dead time, the switch node voltage is 25V. I would expect this voltage to be a diode drop below ground as the body diode of the low side FET should supply the current to the inductive load in the following loop:
When the low side fet transitions on, the sudden dv/dt caused by the switch node transitioning from ~25V to ~0V appears to couple to the high side FET gate through Cgs and cause a large negative transient.
I'm trying to understand why the switch node is staying at 25V after the high side FET turns off, and how to resolve the dv/dt that is causing my high side FET gate transient.
Currently I suspect my low side FET snubber cap is holding up the switch node at 25V, but not sure how to fix the negative voltage transient at the high side gate.
Edit: Updated my circuit after fixing the items pointed out in the comments, still getting large negative transients on my low side gate
I've tried slowing down the turn-on of the high side FET, making the snubber cap on the low side larger.