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DRV8701: Current protection

Cherry Zhou
Mastermind 22235 points
Part Number: DRV8701

Hi team,

Here's an issue from the customer may need your help:

As per the section 7.3.3 Current Regulation of datasheet, the drive current can be set by setting Vref and Rsense 

If the motor is stalled, the current increases beyond the set current value. At this time, dose the internal current protection work or does it require to stop driving the motor?

If the chip internal protection is working, how is it achieved?

Could you help check this case? Thanks.

Best Regards,

Cherry

  • 0
    TI__Mastermind 37683 points

    Hi Cherry,

    Yes, if the current regulation limit is set such that the stall current is above this limit, the device will regulate the current.

    Below is a diagram showing how current regulation can be used to detect a stall condition. This diagram is from this FAQ. 

    Regards,

    Pablo Armet