Hello, I'm in process of creating my first h bridge and i am having some difficulties. I have already fried a transistor or two so I think I may need some assistance.
I'm trying to run a 18V drill motor off of an 18V Li ion battery using an Arduino, N Channel MOSFET bridge, and an Allegro A3941 bridge driver.
I checked and validated that everything is correct on the Arduino side, and made sure the wiring is the same as the schematic (attached).
I checked the gate voltages and the high side default to 18V and the low side to 0V. The 0% PWM is supposed to be 'brake', but I thought that 18V wasn't enough to saturate the MOSFET.
The last time I ran the circuit, I pushed the button to run the motor and it had difficulty trying to run. I'm not sure if this is because I was trying to use jumper wires with a drill motor. I pushed the same button again for a few seconds and the low B side transistor went up in smoke. This transistor was supposed to be held open during the PWM. Also, the high B side transistor was very hot as well.
I would appreciate any help that you could give me.
I have attached the data sheets for the N channel MOSFETs and bridge driver I used as well as my wiring diagram.
I'm trying to run a 18V drill motor off of an 18V Li ion battery using an Arduino, N Channel MOSFET bridge, and an Allegro A3941 bridge driver.
I checked and validated that everything is correct on the Arduino side, and made sure the wiring is the same as the schematic (attached).
I checked the gate voltages and the high side default to 18V and the low side to 0V. The 0% PWM is supposed to be 'brake', but I thought that 18V wasn't enough to saturate the MOSFET.
The last time I ran the circuit, I pushed the button to run the motor and it had difficulty trying to run. I'm not sure if this is because I was trying to use jumper wires with a drill motor. I pushed the same button again for a few seconds and the low B side transistor went up in smoke. This transistor was supposed to be held open during the PWM. Also, the high B side transistor was very hot as well.
I would appreciate any help that you could give me.
I have attached the data sheets for the N channel MOSFETs and bridge driver I used as well as my wiring diagram.
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