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DRV10987: Request a Design review.

Louis Han15
Genius 4680 points
Part Number: DRV10987

Hello

Could you review the attached design file?

Motor Condition : 12V@1A

Best regards

  • 0
    TI__Mastermind 24415 points

    Hi Louis,

    Thanks for posting your question in MD forum. I reviewed the schematic and everything looks good to me. I just have one comment. Since R33 and R34 are constants, motor will operate at fixed speed (if speed is controlled using SPEED pin via analog mode). If you want to vary the motor speed then you should replace R33 or R34 with a potentiometer. 

    Regards,

    Vishnu 

  • 0 in reply to Vishnu Balaraj
    TI__Mastermind 21805 points

    Hi Louis,

    • On the DIR input, I would recommend DNP of R37 if the intent is to pull the pin to GND.
    • Make sure to route a small loop for the following path: SW-L3-C37-SWGND
    • Place C29, C30, C38, C39, & C40 as close to the IC as possible, preferably on the same layer with a short connection back to the DRV10987 pins
      • C29: V1P8-FB2-C29-GND (pin 8)
      • C30: V3P3-FB3-C30-GND (pin 8)
      • C38: CPP-C38-CPN
      • C39: VCP-C39-VCC
      • C40: VCC-C40-PGND

    Thanks,

    Matt