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DRV8601 Drive Control

Doug Barrett
Prodigy 10 points
Other Parts Discussed in Thread: DRV8601, DRV2603, DRV2605
Hi,
We are using the DRV8601 and the current design is driving it with a PWM signal.  Two questions:
1] Is there an applicaiton note that provides direction on PWM controls (e.g. frequency, duty cycle, etc.) to provide different haptic sensations/effects?  FOr example how to drive to generate a "thump" or a "sweep" effectm to name a couple.
2] The Datasheet states - "The DRV8601 can accept a single-ended PWM source or single-ended DC control voltage and perform
single-ended to differential conversion."  Is there an application note for driving the device with the "DC control voltage"?
Thanks.
-Doug

  • 0
    TI__Genius 9670 points

    Doug,

    Thanks for looking at the DRV8601. See my responses below.

    1. You can find a lot of useful information in our newer devices' User's Guides (DRV2603 and DRV2605) that show examples of a few haptic waveforms.  Essentially a waveform is a series of DC voltage and time pairs.  So to create a click you may overdrive the actuator for 5ms, then drive at the rated voltage for another 5ms, and then brake for the last 5ms by applying the reverse voltage.  Please see the DRV8601 datasheet beginning on page 7.  The DRV2605 has an integrated waveform library if you are interested in looking at that.
    2. There are three circuit configurations in the datasheet that can be used to drive a DC motor.  Please see the datasheet starting on page 8.

    Thanks,
    Brian