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DRV8889-Q1: Output Delays

Shinichi Yokota
Genius 9715 points
Part Number: DRV8889-Q1

Hello,

I would need an output delay time of DRV8889-Q1 after these actions are taken. Could you share with me the numbers?

  1. Max delay time until the outputs get disabled after DRVOFF pin is pulled High
  2. Max delay time until the outputs get enabled after DRVOFF pin is pulled Low
  3. Max delay time until the outputs get disabled after 1b is written in DIS_OUT bit of CTRL2 control register
  4. Max delay time until the outputs get enabled after 0b is written in DIS_OUT bit of CTRL2 control register
  5. Delay time until the outputs change after a rising edge at STEP pin

Best regards,
Shinichi Yokota

  • 0
    TI__Guru 56650 points

    Yokota-san,

    I don't have those data yet. Let me check with design team.

  • 0 in reply to Wang5577
    TI__Guru 56650 points

    Yokota-san,

    I got the answer from the design team:

    1. Max delay time until the outputs get disabled after DRVOFF pin is pulled High  (6us for 105V/us and 10us for 10V/us
    2. Max delay time until the outputs get enabled after DRVOFF pin is pulled Low (6us for 105V/us and 10us for 10V/us)
    3. Max delay time until the outputs get disabled after 1b is written in DIS_OUT bit of CTRL2 control register (1.5us for 105V/us and 6us for 10V/us)
    4. Max delay time until the outputs get enabled after 0b is written in DIS_OUT bit of CTRL2 control register (1.5us for 105V/us and 6us for 10V/us)
    5. Delay time until the outputs change after a rising edge at STEP pin” (OUT nodes do not depend on STEP pulse. Peak current mode control determines the output change. Indexer update and new reference for the coil current takes 5us to settle, after rising edge on STEP pin)

  • 0 in reply to Wang5577
    TI__Genius 9715 points

    Hello Wang-san,

    Is it OK to ask one more question?

    • Could you provide me with the Max value (and the Min if possible) of the two parameters?
      • tSR - Output slew rate (only Typ values are written in the data sheet)
      • tOFF - PWM off-time (only Typ values are written in the data sheet)

    Best regards,
    Shinichi Yokota

  • 0 in reply to Shinichi Yokota
    TI__Guru 56650 points

    Yokota-san,

    I don't have min max value of tsr and toff.

    How does the customer use min max value of tsr and toff?