DRV8432: Is switching G_VDD a good idea ?

Part Number:DRV8432

Hello,

I am using a DRV8432 to drive a 24V DC motor.

For safety reasons, the 24V is externally switched so that I can guarantee there is no power delivered when it is not required.

I use the same switch control for the G_VDD rail (12V).

We ran some endurance tests and the 12V rail eventually when shorted to ground. When disconnecting the G_VDD pins from the 12V rail, the 12V came back to normal so the conclusion is that the DRV8432 is burnt.

Is this a bad idea to switch the G_VDD off ?

Would it be better not to switch the G_VDD (keep it to 12V all the time even when the P_VDD if off) ?

Thanks,

Nicolas