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DRV10983: Disable in I2C Mode

Part Number: DRV10983

Hi Team,

My customer is interested to shutdown the DRV10983 motor power in I2C mode externally (via an outside pin) while still being able to communicate to the device via I2C. This is being used as a fail-safe, so it cannot be done via I2C register writes.

One thought is to disconnect the cap from the charge pump to prevent the FETs from getting power? Would it still be possible to communicate with the device in this case?

Please let me know if there are any alternative options.

Regards,

~John

  • Hey John,

    I've sent you an email. Please reply to it and then we can resume out conversation on E2E.

    Best,

    -Cole

  • Hey John,

    After discussing with the team, we don't have a lot of confidence in triggering a charge pump UVLO by disconnecting the cap to prevent the FETs from getting power. UVLOs tend to turn off the digital block which means that I2C communication would be disabled.

    Essentially, it would be better to control the speed via PWM on the speed pin instead of using I2C and using a FET to pull the PWM on the speed pin to GND. Otherwise, turning off the device completely with a FET on VCC is a safer alternative.

    Let me know if you have any questions.

    Best,

    -Cole