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DRV8876: Can this device use for stepper motor?

Yasushi Fujiwara
Genius 12725 points
Part Number: DRV8876
Other Parts Discussed in Thread: DRV8886, DRV8886AT, DRV8711, DRV8842

Hi Experts,

Can DRV8876 use for stepper motor?

Best Regards,
Fujiwara

  • 0
    TI__Guru** 114905 points

    Hi Fujiwara-san,

    It is possible to use two DRV8876 to drive a stepper. But there are restrictions.

    1) If using internal current regulation, only slow decay is available.
    2) If using IPROPI to regulate the current, slow decay and fast decay are available.
         a) Fast decay (Hi-Z) may pull too much current out of the coil.
         b) Fast decay using reverse or forward may reverse the current.
         c) The IPROPI current is not available for all decay modes.

    With these restrictions, it is recommended to use a stepper motor driver like the DRV8886 or DRV8886AT with internal current regulation and multiple decay modes available.

    What is the VM voltage and current of the motor?

  • 0 in reply to Rick Duncan
    TI__Genius 12725 points

    Hi Rick-san,

    Thanks for the answer. VM is 26V and current (full-scale) is 3.5A. Do you have any recommended device? DRV8886 cannot handle 3.5A current.

    Best Regards,
    Fujiwara

  • 0 in reply to Yasushi Fujiwara
    TI__Guru** 114905 points

    Hi Fujiwara-san,

    The DRV8711 with external FETs is a good choice.

    Also two DRV8842 (one for each coil) will work.

    The DRV8711 has a Step/Direction interface and requires fewer control inputs. It also has a SPI interface to configure the device.

    Assuming microstepping is desired, the DRV8842 requires additional control signals to set the proper current levels. At a minimum, control of IN1, IN2, and VREF is needed to adjust the direction and level of current.