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DRV10983 got fried with 24v VCC

Evan Ou
Prodigy 65 points
Other Parts Discussed in Thread: DRV10983

I had two break out board using DRV10983, when I apply 24v to VCC pin, both DRV10983 got fried.  There was no short on the board, and it was working fine with 8.4v apply to VCC.  But the part require 22v at VCC for me to write register. 

What is the cause for the part to fry at 24v?  Was there an power up procedure I am suppose to follow? 

Thanks for any advice. 

  • 0
    TI__Mastermind 26065 points

    Hi Evan,

    Have you stopped the driver when rising VCC to 24V, or just not connecting to the motor when write eeprom.

    Break out board may also be part reason of the issue. 

    Best regards,

  • 0 in reply to Wilson Zuo
    Prodigy 65 points

    Wilson,

    Please see attached picture.  I have followed the DRV10983 application circuit and layout and made this breakout board.

    J1 is connected to VCC and GND.

    J4 is connected to BLDC motor.  ( Motor wasn't plugged in at the time)

    You can see the burned mark near VCC pins.

    I don't think I did anything wrong, I checked for short on every pin, and with VCC = 8.2v, I can see the motor spinning.  But the motor driver smoked when I try to program the register. 

  • 0 in reply to Evan Ou
    TI__Intellectual 1185 points

    Evan,

    DRV10983 has been working  with 24V system very well, we have multiple reference designs / customer designs where we use it for driving 24V motor.

    You have mentioned J1 for VCC and GND and J4 for BLDC motor. I guess its typo mistake, right ? J4 should be p\for Power and J1 should be motor output looking at your picture.

    Did you see any abnormal current drawn during EEPROM programming ? ( its bit more during programming though) . Is there any chance of external short while programming in the setup?

    Thanks,

    Jasraj