BQ24074: Power management forum

scharppe

Part Number: BQ24074

During normal charging conditions, if TS is changed to outside the operating range (~ 0.3V or 2.1V), charge to the battery is disabled but the CHG pin remains low indicating charge is not disabled. It appears that the only conditions where the CHG pin indicates the correct charge state is if Vin < UVLO or if charge is disabled via the CE pin.

Is this normal behavior?

over 5 years ago

0 Raheem over 5 years ago

TI__Mastermind 21590 points

Hello,

This is normal behavior. Table 3 shows when the /CHG will be high impedance. /CHG will be low when TS is outside operating range but VBAT is below VBATREG.

0 scharppe over 5 years ago in reply to Raheem

Prodigy 150 points

Thanks for the reply Sharafadeen. I would think the CHG pin should also indicate if charging is stopped by the temperature sensor as well. I assume there is no fix for this correct?

0 Raheem over 5 years ago in reply to scharppe

TI__Mastermind 21590 points

Hi,

If you have an ADC, you can read the voltage on the TS pin. Or you can add an external comparator to see when VTS is outside the normal range.