• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 29 subscribers
  • Views 434 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.

DRV 8824 Decay input port fault

Yoda 747
Prodigy 20 points
Other Parts Discussed in Thread: DRV8824, DRV8824EVM

Hello,

Have a weird problem and I can not find the cause.


We use a drv8824 with pin 19 (decay) loose so it's in mix mode.
It's already happened a few times that the decay input is faulty.
The driver is going in slow decay and the input gate 19 (decay) no longer responds to a signal (low-high or loose). The stepper motor makes noise and does not run properly.

This has happened a few times, the driver chip is defect but only the decay input pin.
Does anyone have an explanation for this?

Hope someone on this forum knows a solution to this!

Thanks.

  • 0
    TI__Guru** 114905 points

    Hi,

    Can you provide more information?

    What are the settings for MODE[210]?
    Are you stepping the motor during this time? How fast are you issuing step commands?
    What motor are you using?
    Can you provide scope captures of the current, STEP,  xOUTn, and nFAULT during the time in question?
    Are you using the DRV8824EVM or your board? If your board, can you provide schematics and layout?

    Thank you.

     

  • 0 in reply to Rick Duncan
    Prodigy 20 points

    Hello sir,

    I will give the necessary information as soon as possible.

    Thanks