Three months ago I made a circuit to drive small dc motor with only one Mosfet connected as high side and used IR2110 to drive the Mosfet and it worked. Now I’m trying to remake the same circuit and it’s not working. I checked the connections like 100 times also I went back to the simulations I did and still the HW not working.
The HW behavior is connecting HIN pin to either VDD or GND the motor is rotating and the IR2110 is getting really hot in very short time.
I tried to remove the gate from HO and connect it to VS manually the motor stops then reconnect it to VB and the motor starts again. Also I noted when gate is not connected to IR2110 it’s not heating.
I thought maybe it’s damaged and tries three different IR2110 and behaves in the same manner. I checked the low side and it works fine on all 3 of them.
Is there anything I’m missing that could cause this behavior ?
The HW behavior is connecting HIN pin to either VDD or GND the motor is rotating and the IR2110 is getting really hot in very short time.
I tried to remove the gate from HO and connect it to VS manually the motor stops then reconnect it to VB and the motor starts again. Also I noted when gate is not connected to IR2110 it’s not heating.
I thought maybe it’s damaged and tries three different IR2110 and behaves in the same manner. I checked the low side and it works fine on all 3 of them.
Is there anything I’m missing that could cause this behavior ?
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