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DRV8845: Unused Driver 3 and 4

Part Number: DRV8845

Tool/software:

Hello Team,

My customer is evaluating DRV8845, and we are unsure if the unused driver related pins can be left floating or if there is a certain termination that needs to occur. Specifically, they will not be using drivers 3 and 4 in the evaluation. What is the proper design for leaving the following pins unused?

  • Vref3
  • Vref4
  • I03
  • I04
  • I13
  • I14
  • Phase3
  • Phase4
  • Out3A
  • Out3B
  • Out4A
  • Out4B
  • Sense3
  • Sense4

Best,

Erika

  • Hi Erika,

    Thank you for the post. Please see below.

    • Vref3 - GND
    • Vref4 - GND
    • I03 - High
    • I04 - High
    • I13 - High
    • I14 - High
    • Phase3 - Low
    • Phase4 - Low
    • Out3A - open
    • Out3B - open
    • Out4A - open
    • Out4B - open
    • Sense3 - PGND, GND
    • Sense4 - PGND, GND

    Regards, Murugavel