Hi Asif,
As you said, the answer depends for both. There is a more pressing issue however. The absolute maximum rating for the DRV8301 is 65V. This voltage is also the max VDS that the FETs will see.
At >50V, the bulk capacitor should be large enough to protect the DRV8301. If it is not, some type of voltage clamp should be used to prevent VM exceeding the absolute maximum.
Have you looked at the DRV8301-HC-C2-KIT? This can be used as a starting point for your design. It is rated to 60V and 82.5A full scale range.
As you said, the answer depends for both. There is a more pressing issue however. The absolute maximum rating for the DRV8301 is 65V. This voltage is also the max VDS that the FETs will see.
At >50V, the bulk capacitor should be large enough to protect the DRV8301. If it is not, some type of voltage clamp should be used to prevent VM exceeding the absolute maximum.
Have you looked at the DRV8301-HC-C2-KIT? This can be used as a starting point for your design. It is rated to 60V and 82.5A full scale range.