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DRV8302: just heating up & the gate drivers aren't working

Part Number: DRV8302

Hi Team, 

Good day. I am posting this inquiry on behalf of the customer.

"I need technical support on one of your motor drivers, the DRV8302.

I'm not too sure how to make it work, and so far it is just heating up & the gate drivers aren't working. GVDD is also at 2.4V for some reason when running it at 12V."

MotorDriverBreakouts_v19_2023-05-02(1).zip

design.pdf

Untitled page.pdf

Please help to advise. Thank you for extending your support.

Kind regards, 

Marvin

  • Hi Marvin,

    Thank you for sending this customer request along. I will need to review the files sent and aim to provide an answer by the end of the day on Thursday.

    Best,

    Davis

  • Hi Marvin,

    In regards to the design shown in the files you sent above, we recommend that any motor driver application that runs external MOSFETs be implemented on a comprehensive PCB. The breadboard and jumper cables separate the driver from the power stage by such a large distance that parasitic inductances can cause issues with the system. The breadboard-jumper connection points will also add to these parasitics. Physical distances from the driver to bulk/bypass capacitors as well as from the driver to the power stage MOSFETs need to be kept as short as possible to reduce the size of current loops. Additionally, gate driving copper connections need to be as wide as possible due to the high current passing through them. Lastly, it is recommended to use plenty of vias in the thermal pad in order to help dissipate the heat created by the device. For more information, please refer to section 10 - Layout in the DRV8302's datasheet.

    Best,

    Davis