Freewheel diode with reverse polarity protection


I recently purchased a TB67H420FTG board to power a 24V DC gear motor. The board works well in my application but, as I am fairly new to electronics, I would like to understand more about the power circuit.

If I have reviewed the schematic properly, it seems to employ a p-channel MOSFET with a Zener diode for reverse polarity / battery protection. My question is whether or not this provides the same protection as a freewheel diode or whether I still need one across my motor.

Thanks in advance for any guidance.

The P-channel mosfet protect the board against reverse polarity, with lower losses than a common diode. This video explains it all.

The TB67H420FTG already has buildin back-EMF protection for the motor. Look at the mosfet output stage of the chip (pin 13-24) on page 4 of the datasheet (the eight diodes). Leo..

Power MOSFETs have built-in body diodes that’s part of how they are made, so all MOSFET bridges are
already provided with free-wheel diodes.

BJTs and IGBTs need them as additional components, and even MOSFET circuits sometimes have additional
schottky diodes to reduce losses (lower forward voltage than body diodes).

Thank you, both, for sharing your insight. Very helpful information.

Cheers, Sean