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bq274xx SOC1 Threshold Settings

I am developing with the bq27421 gas gauge and using the SOC1 set threshold to assert the GPOUT pin and generate an interrupt on my host microcontroller.  My questions are about the valid values for SOC1 Set Threshold and SOC1 Clear Threshold.  I do not care about the SOC1 Clear Threshold in my application (that is, I only care when the SOC falls to or below the SOC1 Set Threshold).

  1. Is it acceptable to set the SOC1 Clear Threshold to 0 and the SOC1 Set Threshold to any non-zero value?  This would be ideal in my application.
  2. Is it acceptable to set the SOC1 Clear Threshold and SOC1 Set Threshold to the same value?

Thanks,

Jim

  • Hi Jim,
    Based on bench tests, I do not see anything wrong in either setting SOC1 clear thresholds to 0 or a value equal to the SOC1set threshold. The SOC1 set threshold takes precedence in the algorithm so if SOC1 clear threshold is set to a value lower than or equal to SOC1 set threshold the SOC1 bit will only clear when the SOC is above SOC1 set threshold.

     

    Onyx