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DRV8302: 2 DRV8302 cannot operate simultaneously

Cherry Zhou
Mastermind 22235 points
Part Number: DRV8302

Hi Team,

Two DRV8302 chips are placed on the PCB and the circuit is nearly identical to the reference circuit in the datasheet. A chip close to the power supply will work properly, while regarding the farther one, after turning its EN_gate on (pwm=1 mode), and with INH1, INH2 and INH3 are all at 0, the voltage measured at all GH pins and all SH nodes is approximately 6V. But all of the above voltages should be 0V. 

Could you help check this case? Thanks.

Best Regards,

Cherry

  • 0
    TI__Expert 8401 points

    Hi Cherry, 

    Thank you for your question.

    This issue may be caused by damaged pins. Could you still provide both circuits in pdf form for overview? 

    And for both chips, can you provide the waveforms measured on GHx and SHx when they are supposed to be on and off? 

    Thank You and Best Regards,

    -Joshua