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CCS/DRV8301: DRV8301 PVDD higher than 53.7v FAULT

Part Number: DRV8301

Tool/software: Code Composer Studio

hi all,I have encountered such a problem. 
I
I designed a board with DRV8301 to drive the motor,When the voltage PVDD is higher than 53.7V,
the DRV8301 displays the OCTW and FAULT pin is low.
However, I switched to another model motor and it works fine.
so, I hope to get some suggestions 。thanks