Hello,
We recently asked a company to develop a motor driver for us.We got the board and when we connect this this the DRV8701E blow up.
(yes blow up, only power on,not running motor just put power on the card with motor connected)
the company is saying that the problem is our machine,(potential voltage difference). somehow I think this is not correct. (other cards do not blow up)
also if I would turn the motor by hand it would create a voltage, that would go back to the driver. so this would also damage it ?
I think they didn't design it correctly. but I would like to know a bit more :
1. if there was incoming voltage from the motor to the driver. the H-bridge would stop this ? if not how much voltage can the DRV8701E withstand ?
2. looking at the schematic drawing, do you guys see anything obviously wrong in the design ?
3. to prevent this from happening what protection is necessary ? does such protection shows in the application notes ??
hope you guys can help me a bit .
many thanks
Peter
