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BQ25713: BQ25717 Battery Detection Process.

Divyesh Tilva
Prodigy 40 points

Part Number: BQ25713

we are using BQ25713 in one of our product with 2 cell battery system.

Right now for detection of Battery presence i am setting charging current to zero and from ADC's battery voltage indication register i am reading battery voltage if it is zero then battery is absent and if i got voltage

then battery is present.

I am starting charging with 256 mA charging current and all other registers as default value.

MinSystemvoltage is same for 2 Cell system which is 6.144V

MaxChargeVoltage is 8.4V.

And i am enabling ADC and it's option register with all field.

if we provide DC input of 9V then our system is working fine but if we provide input volatge as 12V then our system is restarting.

So is there any way suggested by TI for this part how to enable charging and is there any particular way to detect presence of battery in system.

  • 0
    TI__Mastermind 37485 points

    Hi, Divyesh,

    BQ25713 has a dedicated CELL_BATPRESZ pin, when CELL_BATPRESZ pin is pulled low to indicate battery removal. I would suggest you using the independent comparator CMPIN  to detect the battery voltage, then send CMPOUT signal to pull down CELL_BATPRESZ pin.