BLDC/BLAC controller motor voltage reverse protection
If you only want to protect against reverse polarity then you are using the wrong technique. Instead of an LM5050 you can just turn the FET on with positive supply voltage. If the polarity is reversed the FET won't turn on.







simulate this circuit &ndash; Schematic created using CircuitLab

As in your circuit the FET is oriented so the body diode conducts, then the FET shorts it out when turned on. However since we don't have a Gate voltage booster the FET has to placed in the negative lead so positive supply voltage will turn it on. This means either the supply or controller's negative rail must be floating (not connected to ground).