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DRV8302: Driver output GL_C signal abnormally

Cherry Zhou
Mastermind 22235 points
Part Number: DRV8302

Hi team,

After power up, the MOS tube is turned on incorrectly when the GL_C signal has a 1.8-V fluctuation voltage without a PWM input (standby).  The customer has checked the GL_B, GL_A , and did not find a problem.

Could you please help resolve this case? Thanks a lot.

Best Regards,

Cherry

  • 0
    TI__Mastermind 26046 points

    Hi Cherry,

    Is the PWM input floating? Can you check if INL_C still has 100k pulldown to GND using a DMM? 
    Are you using gate resistors at the gate outputs?
    Is GVDD stable and around 10-12V?

    It may also be good to see the schematic and/or layout of the customer's board. 

    Thanks,
    Aaron