Just curious if anyone out there has built an H-bridge at a hundred volts or more, and used it to drive at least a few hundred mA with PWM. I’ve got one working now using four 100V-compatible FETs, but at 0.1mA the circuit tends to destroy one of the P-FETs. All of the devices are rated for much more current than that, but I suspect that the pulsing is driving current in and out of the drain on that P-FET (while it is off) and causing it to overheat.
I should also mention that I’m using this to drive a non-inductive load - so current spikes shouldn’t be a problem. But if anyone is running an H-bridge like this successfully for any application, let me know! Thanks.