This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DRV8881: Full step (2-phase excitation) with 71%

Part Number: DRV8881

Hi all

Would you mind if we ask DRV8881E?

We recognize that the current regulation is required in case of Full step (2-phase excitation) with 71%
Using DRV8881E, is it necessary to limit current with XREF pin?
Or, in case of 2-phase excitation, does the device adjust current automatically?

Kind regards,

Hirotaka Matsumoto

  • Hi Matsumoto-san,

    The DRV8881E does not automatically adjust current to 71%. The DRV8881E does not have an indexer that adjusts the current based on microstepping mode. The current is adjusted using the XVREF pins.

    Limiting the current is generally required when the VM voltage is higher than the rate motor voltage and 100% duty cycle is used.

    I hope this answers your question.