• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 31 subscribers
  • Views 190 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DRV5013: Output signal problem

Bright Zhu
Intellectual 260 points
Part Number: DRV5013

Dears

Drv5013 is used in Hall-Board project. Under the condition of 5V power supply and normal temperature, one of the Hall components is damaged, and the appearance is free of any damage. Please ask the original manufacturer to help analyze what causes the component damage. Thank you!

1.Vcc:5v

2.There is no short circuit under the Vcc/Gnd test

3.The test board does not have a soldered ESD protected array

SCH:

PCB form factor (red circle for Hall fault part)

Thanks!!

  • 0
    TI__Mastermind 19580 points

    Hey Bright,

    Thanks for posting to the sensing forum!

    Looking at the schematic I see one bypass capacitor but I do not see any of the recommended bypass capacitors that we recommend to place close to the devices. A minimum of 0.01uF is recommended but a larger value may be used if there is high inductance in the power line or to filter out any ripple. The hall sensor that is pointed out to be damaged seems to be the one that is furthest away from the capacitor on the board.

    Another thought is if the device shares a Vcc with a motor and the motor back-powers the VCC beyond the max 40V then this could potentially also damage the device.

    Other than that has another DRV5013 been populated into the system to verify that it is not a problem on this board?

    Best,

    Isaac

  • 0 in reply to Isaac Lara
    Intellectual 260 points

    Hi  Lara

         

    1. The P2P test has been verified, and the phenomenon follows the bad IC

    2. We only have one broken PCB in hand, and we will continue to track whether the other one is the same

    3. Which way would it be better to add E1 (TVS) and bypass capacitors? Or both?

  • +1 in reply to Bright Zhu
    TI__Mastermind 19580 points

    Hello Bright,

    Thanks for the info, so it looks like the IC may have been damaged somehow. Bypass capacitors are typically used to help stabilize the power supply to the device, and large bulk capacitance can help with slow transients in the power supply that come from the motor.

    If you are expecting a large amount of high voltage transients it might be useful to place a tvs diode. The bypass capacitors are always recommended to use on the device. Ensure that your capacitors are rated to handle the max expected voltage of your transients.

    Best,

    Isaac

  • 0 in reply to Bright Zhu
    TI__Mastermind 19580 points

    Glad to help out Bright, please let me know if you have any additional questions!

    Best,

    Isaac