Hello guys, I've a problem with a custom board. This board is a power side of a motor power circuit controlled by a logic side that just send configurations, clock, dir, step to a driver controller.
I post here a schematic:
There's also several checks by driver component about overcurrent, overtemperature etc. and another current sens that is controlled by logic side.
This schematics were used on different boards and never fault (but never checked if really correct, maybe fortunate circumstances). I've upgraded MOS with minor changes and now they blow up after some minutes of running, even without load on stepper. Also temperature is low, so it's not related to overheat.
Have I missed something or is there something not correctly sized?