Hi
I have a motor controller for a maximum voltage of 58.8V based on DRV8353S
Some of the boards are having problems with the DRV8353 that is heating up massively and quickly as soon as the VM and VDRAIN is connected.
Inspecting one of the damaged boards I noticed that the VGLS and GLA pins were shorted with the GND pin. the VGLS capacitor is fine and the mosfet connected to GLA is fine also.
I don't know the conditions on which those boards were damaged because they were using by customers.
I just want to know what can damage the VGLS regulator and what can I do to avoid this happening to other boards and also if I need to fix the circuit for the next batch
This is the circuit of the DRV8353, VM and VDRAIN are connected with a net tie (N1)
and this is the circuit for each of the phases of the motor