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DRV8811: The power sequence between VM and VCC

Hirotaka Matsumoto
Guru 27585 points
Part Number: DRV8811

Hi all

Would you mind if we ask DRV8811?
Is there the power sequence between VM and VCC?

Is it possible to use this device following conditions?

<The condition>
-VCC=ON
-VM=OFF
-Logic signal ENABLEn,RESETn,USM0,USM1 and DECAY are pull up 3.3V.

We assume that there is no problem.

Kind regards,

Hirotaka Matsumoto

  • 0
    TI__Genius 14487 points
    Hello Matsumoto-san,

    The DRV8811 has UVLO protection for VM and VCC. The UVLO will lock out the device if either supply is below the UVLO threshold. Because of this you should be able to ramp the supplies in any order.
  • 0 in reply to James Lockridge19
    Guru 27585 points

    James san

    Thank you so much for your reply!

    The DRV8811 has UVLO protection for VM and VCC. The UVLO will lock out the device if either supply is below the UVLO threshold. Because of this you should be able to ramp the supplies in any order.
    ->We got that The UVLO will lock out the device.
       We would like to confirm as followings;
       VCC=Always high.
       VM=When the customer would like to operate, VM turns on(supply the voltage). It means discontinuous control action.
       The customer would like to reduce the consumption of VM voltage.
       Is it possible? And the device doesn't damage, right?

    Kind regards,

    Hirotaka Matsumoto

  • 0 in reply to Hirotaka Matsumoto
    TI__Genius 14487 points
    Matsumoto-san,

    Correct, the device will not be damaged in this condition.