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DRV8306: IC damaged during BLDC commutation and enable/disable switching

Part Number: DRV8306
Other Parts Discussed in Thread: CSD18514Q5A

I'm driving a BLDC 3 phase, and using the enable to turn the motor on/off. It appears to work most of the time, but every so often the IC blows up. It appears the damage is happening on pins 3 and 4 (VM and VDRAIN), this latest time the pads burned up as well destroying the board. The current is not that excessive (3-4 amps at the moment), I'm using CSD18514Q5A FETs, and PWM freq ~50kHz. I am not using the nBrake pin, is this the proper way to stop the motor? Can you provide a suggested turn on/turn off sequence of the DRV8306? Do I need to 0 out the PWM and hit the nBrake before disabling the IC? Would my current set up of switching the Enable pin with a mechanical switch pose a risk to the IC? I have also been sweeping input voltages (~12-16V), would there be any issue with adjusting VM and then re-enabling the device?

Please let me know, thanks.