Dear my friend
please have a look at the attached drawing . this is a pwm motor driver . it really works and i test it. but the problem is that with any types of diode that i put instead of D6 in my circuit the D6 will become very hot . please give me an advise to correct my drawing.
Thanks
What's the load current? You may simply need a diode with a higher current rating. Even with a none-perfect gate drive, D6 shouldn't show higher losses. The bootstrap circuit most likely doesn't work with all possible duty cycles, but that's another topic.