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DRV2625: Diagnostics and Calibration both failed

Bruce li
Genius 5580 points
Part Number: DRV2625

Dear TI Experts,

My customer is debugging DRV2625 in their own board, basic function is OK, however, there is error when Diagnostics and Calibration. Both case will return Reg01=0x88.

Could you kindly give some advice about this issue? Thanks a lot.

Attached is inear resonant actuator sepc, below is register parameter when calibration.

FZ-ECAD SPEC_V1.0 20170120.pdf

  • 0
    TI__Expert 8701 points
    Hi Bruce,

    The setting for register 0x2A = 0x03 indicated using the Trigger controlled auto-calibration method. Do they need to use the trigger control method? If so, are they running the auto-cal for >1000ms? To use the trigger mode for auto-cal, you need to run the calibration for >1000ms. I suggest changing this to 0x01 or 0x02.
    It looks like for 260Hz, reg1F = 0x3D = 1.7Vrms for rated voltage and reg20 = 0x75 = 2.4Vp for overdrive clamp. We typically recommend the overdrive clamp be above the rated voltage. In this case they are set about equal. I would suggest setting reg20 = 2.6Vp = 7E. This is 1.85Vrms*sqrt(2). Datasheet lists 1.85Vrms as max voltage range.
  • 0 in reply to Kelly Griffin
    Prodigy 40 points

    Hi Kelly,

      I'm the customer. Thanks for your answer, i used the trigger controlled auto-calibration method and running about 2000ms.

      I tried as you suggest, but failed.

     below is register parameter when calibration

     

    there is error when Diagnostics too, the R(act) is valid Calculate by DIAG_ Z _RESULT and CURRENT _K

    Regards,
    Bin

  • 0 in reply to Kelly Griffin
    Genius 5580 points
    Dear Kelly,
    Thanks a lot for your support, Bin is my customer, he has replied the test result , could you kindly help to review it? Thanks again.
  • 0 in reply to user5352320
    TI__Expert 8701 points
    Hi Bin, did you also try using 500ms or 1000ms auto-calibtaion times?
  • 0 in reply to Kelly Griffin
    Prodigy 40 points
    Hi Kelly, i think I've solved the problem.
    The problem may be due to the instability caused by motor vibration, All I need to do is fix it and DRV2625 will work well.

    Thank you very much for answering this question.

    Best Regards,
    Bin