DRV8452: How to calculate bulk cap?

Hi team,

Could you let me know how to calculate the recommended bulk cap value?

The datasheet 10.1 describes about the bulk cap, but it doesn't explain how to calculate that specifically.

The FS current of the target motor is 122mA. As four motors are connected to the same VM, my customer assumes larger bulk cap should be needed.

I'm asking my customer to show us the schematic.

Best regards,

Kazuki Itoh