Hi,
The back electromotive force occurs and the regenerative current flows to VM power supply port if forcibly turning the 3-phase brushless dc motor which is conneted to the output ports on the DRV8313 by hand without the power supply voltage.
The load of that motor is heavy and it becomes hard to turn although DRV8313 isn't dameged at that time.
I am considering that the load of that motor have kept to become light if the regenerative current doesn't flow to VM power supply port.
Unfortunately, there wasn't the effect although increaseing VM bulk capacitor.
It seems that the high side FET maybe turns on a little by the back electromotive force.
So, could you please tell me how to avoid the regenerative current which flows to VM power supply port ?
In addition, please give me an email to my email address since I would like to share the detailed information to you.
Best regards,
Kato
