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BQ25890: The ADC with BQ25890

user5006961
Intellectual 805 points
Part Number: BQ25890

Hollo，I found there was something wrong with the 0E and the OF registers in the process OF using BQ25890。These two registers can read my battery voltage and other data while I'm charging，but I can't read the voltage and current of the battery when it discharges.  Does ADC sampling only work when the battery is charged?

  • 0
    TI__Guru**** 166626 points
    When no VBUS is connect, the ADC can only read the battery voltage if V(BAT) > MINSYS voltage. The default MINSYS is 3.7V. If you change the MINSYS voltage to the lowest setting, 3.0V, the ADC will be able to read the battery voltage down to 3.0V.