So I’m using the ir2110 mosfet driver with to drive the ir3205 mosfet in a high side circuit. The problem is that the circuit is not working. I’ve rebuilt it many times so I don’t think I’ve made any basic mistakes. I’m using an 22uf tantalum capacitor for the bootstrap operation, 10ohm gate resistors and a 14V power supply for the bootstrap. I’m driving a 12v motor. Like I already said, I’m only using 1 mosfet for the high side, I’ve grounded everything else.
I’ve had several problems with this circuit, one of them being that the motor isnt turning, but also that source is actually giving the mosfet power, not from my 12v supply for the motor, but from my 14V supply that I’m using for the bootstrap. When I’m writing this the Vb voltage is 14V in relation to ground but 0V in relation to Vss.
BTW, using this chip in a low side circuit works fine, but in the high side there aren’t even a small signals indicating that the mosfet is getting turned on, as if the bootstrap capacitor weren’t getting charged up to the proper voltage. I checked the difference in voltage of the capacitor and my voltimeter said 0.
My circuit is the one on the front page of the datasheet I’ve included (ir2110)
ir2110.pdf (329 KB)