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DRV8434S: Operation when it detects stall

Taito Takemura
Expert 3190 points
Part Number: DRV8434S

Hi experts,

When DRV8434S detects stall, will DRV8434S stop the motor or not?  If there is a register that affects whether or not to stop, it would be helpful if you could also tell us the register information.

Thank you for your help.

Regards,

Taito Takemura

  • 0
    TI__Mastermind 44375 points

    Hi Takemura-san,

    When DRV8434S detects stall, the DRV8434S will continue to drive the motor - see page-36 "Fault Condition Summary" table row 5. There is not any register setting to define whether to stop or not. Instead as soon as a stall is detected nFAULT line will go LOW if STL_REP bit is set to 1. This can be used to interrupt the MCU and the MCU can stop the STEP input or disable the H-bridges. The reaction time will be real-time if this method is followed. Alternatively the FAULT status register can be read periodically by the MCU and check for STL bit to change to 1. This will allow the MCU to detect a stall has occurred and it can decide to either stop the STEP pulses or disable the bridges. This method will have a short lag. Thanks.

    Regards, Murugavel