Hello,
I was driving MOSFETs in the H-bridge configuration without a load. The MOSFETs were kind of hot to my hand. So, what I did was just to connect only half of the bridge and used the same gate driver as in the H-bridge. Please refer to the attached file. The circuit to the right is the turn-on delay block, having a level-shift zener diode and 1N4148 to speed up discharging the gate pin. I wanted to know if there was supply shoot-through or not and if the heat I got previously was acceptable. I ran the circuit. The fuse did not break. No explosion, No smoke. Right after I shutdown the circuit, I touched the MOSFETs and felt the same heat (80 degree celcius or 176 fahrenheit I guess). The MOSFET package is TO-247.
So I would like to know if this is normal or not?
Thank You
BlackMelon
I was driving MOSFETs in the H-bridge configuration without a load. The MOSFETs were kind of hot to my hand. So, what I did was just to connect only half of the bridge and used the same gate driver as in the H-bridge. Please refer to the attached file. The circuit to the right is the turn-on delay block, having a level-shift zener diode and 1N4148 to speed up discharging the gate pin. I wanted to know if there was supply shoot-through or not and if the heat I got previously was acceptable. I ran the circuit. The fuse did not break. No explosion, No smoke. Right after I shutdown the circuit, I touched the MOSFETs and felt the same heat (80 degree celcius or 176 fahrenheit I guess). The MOSFET package is TO-247.
So I would like to know if this is normal or not?
Thank You
BlackMelon
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