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Original question:

DRV8301: No load, Vds overcurrent flag keeps triggering, PULLING HAIR OUT :)

DRV8301: DRV8301 reset method

Eason Yuan
Intellectual 840 points
Part Number: DRV8301

Hi there，

Could you please help answer the question from our customer？

Since PVDD1 is connected to the same power supply as the BLDC motor, when the voltage is pulled below 6V, the DRV8301 is not controlled when it is restored, and there is a problem that the MOS is always turned on to cause a large current.

Is there any way to avoid it? Or enable the DRV8301 to reset under uninterrupted power.

  • 0
    TI__Guru 65220 points

    Eason,

    Could you explain your comments: "the DRV8301 is not controlled when it is restored"?

    The DRV8301 has undervoltage protection which should put the external FETs into hi-z when PVDD drops below the PVDD_UV threshold. 

    The DRV8301 also has Rgate_off which should ensure that the gates inputs are pulled low by ~2kohm internal resistance if the chip loses power.

    What is the condition of the other control pins and power supplies when your PVDD1 drops low?

    Regards,

    -Adam

  • 0 in reply to Adam Sidelsky
    TI__Guru 65220 points

    Eason,

    I didn't see a response so I am closing this thread for now.

    Regards,

    -Adam