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DRV2511-Q1: OUT+/OUT- tolerance at Standby

Shinji Tsuji
Genius 12378 points
Part Number: DRV2511-Q1

Hi team,

I am trying to driver VCM using DRV2511.

In order to minimize DC current loading on the VCM while not actively driving, I plan to put DRV2511 in STNDBY mode while DRV2511 doesn't drive the motor.

I concern if back EMF caused by VCM will damage or degrade the life time reliability of the device if back EMF is applied to OUT+/- pin when the device is in STDBY mode.

Is that OK to use the STDBY mode like this?

Is there any concern regarding to the reliability or device operation perspective?

regards,

  • 0
    TI__Guru* 84915 points

    Hi, Shinji,

    There shouldn't be any issue if you use the standby mode like this.

    My only suggestion is related to the absolute maximum ratings that the DRV2511-Q1 can achieve. You must ensure that the DC current on OUT+ and OUT- doesn't reach +/- 8A. Even if the outputs are protected and the devices goes to a shutdown mode when the overcurrent is reached, the device life time may be affected if the device is exposed under extended periods. If the back EMF doesn't result in a high current at these levels during standby mode, then there won't be any issue and the device life time won't be affected.

    I hope this is clear. Please let me know if you have additional questions or comments.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    TI__Genius 12378 points

    Hi Luis,

    Thank you for your prompt. It always helps me.

    regards,