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DRV8873: Audible noise issue

TISL
Expert 4630 points
Part Number: DRV8873

Dear e2e support,

My customer is facing a high frequency audible noise issue on his protoype, using our DRV8873H.

I don't see any limit (slew rate, PWM freq or duty cycle, outpout power, ...) which could explain it.

The settings and test reports (confidential) can be shared in private message.

Would you have any idea where we should investigate?

Regards,

  • 0
    TI__Guru** 114905 points

    Hi TISL,

    Please send the settings and test reports.

    Please be sure to include the VM voltage, load specifications, and scope captures of the inputs and output voltages, and output current.

    Are the outputs switching at the same frequency and duty cycle as the inputs?

    Is this data taken on the DRV8873HEVM or customer board?

  • 0 in reply to Rick Duncan
    TI__Guru** 114905 points

    Hi TISL,

    Thank you for the test reports. Since we are discussing privately, the thread will be marked as "TI thinks resolved".

    Once resolved, we may add the findings here for all to benefit.