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DRV8880: Detecting Motor Faults

Victor Salomon
Expert 3540 points
Part Number: DRV8880
Other Parts Discussed in Thread: DRV8886AT, DRV8711

Hello team,

I am supporting an application that might use DRV8880 to drive a Stepper Motor and, I am wondering what is your recommended solution for detecting motor faults, such as the motor stalling, is there any functionality on the DRV8880 that would allow for this? otherwise, is there any similar device like DRV8886AT that would allow for such functionality?

  • 0
    TI__Guru** 114905 points
    Hi Victor,

    Do you mean end of travel detection, missed steps during operation, or both? Depending on the application the desire may be different.

    The DRV8880 and DRV8886AT do not support motor stall.

    The DRV8711 with external FETs has a feature that can detect motor stall under some conditions.
  • 0 in reply to Rick Duncan
    TI__Expert 3540 points
    Hi Rick,

    I believe the application would be looking to detect a mechanical stop or increased torque, it seems like DRV8711 might be able to do just that, however it does not seem to have AutoTune™ like DRV8880 and DRV8886AT do, I might suggest to look into our Hall Effect sensors for this application.

    In regards to DRV8886AT, is there any other advantage for the Current Sense than besides eliminating the need for two external power sense resistors?
  • 0 in reply to Victor Salomon
    TI__Guru** 114905 points
    Hi Victor,

    The DRV8711 has automixed decay, which is an early version of AutoTune. Tuning is a little more complicated.

    In addition to eliminating the cost and power of the two sense resistors, the DRV8886AT has a smaller package size when comparing the PWP package. The Toff time of the DRV8886AT is fixed versus the variable Toff of the DRV8880.