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DRV8835: Function of MODE pin

masahiko shimizu
Guru 11235 points
Part Number: DRV8835


Hi,

My customer is using DRV8835.
He has below question.
Could you please answer below?

Q1: Can we change the interface mode from IN/IN to PH/EN during operating motor?
      When does logic level of MODE pin detect by DRV8835?  At release UVLO or sleep mode? or anytime?

Q2: Which mode(IN/IN or PH/EN) does DRV8835 detect at supply middle range voltage(0.3xVcc< middle viltage <0.5xVcc) to MODE pin by external circuit?


Best regards,
Shimizu

  • 0
    TI__Guru** 114905 points
    Hi Shimizu-san,

    We will investigate and reply soon.
  • 0 in reply to Rick Duncan
    TI__Guru** 114905 points
    Hi Shimizu-san,

    Q1: Can we change the interface mode from IN/IN to PH/EN during operating motor?
    When does logic level of MODE pin detect by DRV8835? At release UVLO or sleep mode? or anytime?

    The change to the MODE input is detected immediately. Because of that, it is recommended to either disable the outputs or set the outputs to active low prior to changing MODE.

    Q2: Which mode(IN/IN or PH/EN) does DRV8835 detect at supply middle range voltage(0.3xVcc< middle viltage <0.5xVcc) to MODE pin by external circuit?

    It is unknown. The transition point will vary from device to device.