• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 48 subscribers
  • Views 239 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

INA237: Deactivate undercurrent error

Thomas P.
Prodigy 60 points

Part Number: INA237

Hi Team,

In my application the output current might be zero and and I just want to use the overcurrent and overvoltage threshold.

Can I deactivate the undercurrent error on the ALERT pin in any way?

Will the alert pin trigger if I set the threshold to 0 and there's no shunt current?

Thanks,

Thomas

  • 0
    TI__Genius 10895 points

    Thomas,

    The shunt undervoltage threshold is actually in two's complement format, so the lowest value you can set it to will be 0x8000, corresponding to a shunt voltage of -0.164V or -40mV depending on your ADC range. This might help you detect reverse current flowing across the shunt resistor. The alert will not trigger unless the threshold is exceeded, so the shunt undervoltage alert will never trigger if the SUVL register value is 0x8000. 

    Let me know if you have any more questions,

    Levi DeVries