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Bq24165

Asish Banerjee
Prodigy 180 points
Other Parts Discussed in Thread: BQ24165

I want to use BQ24165 in my gsm modem application. I have some question regarding this ic.

1) What will be the output voltage if battery is not connected?

2) If input power is not present and system load is on battery, if battery voltage goes low will it cut off load automatically? If not then how to incorporate low battery cut off mechanism go get rid of battery deep discharge?

  • 0
    TI__Guru**** 166176 points

    Regarding 1, the voltage will be 4.33 typical.

    Regarding 2, the charger is expecting the battery to have a protector that opens to prevent deep discharge.  The charger has a BATUVLO comparator that will turn off the BATFET if V(BAT) drops to 2.5V typical.  The minimum value is not specified but is close to 2.0V.  The ILIM(dishcarge) feature also turns off the BATFET for a short time if the discharge current exceeds 7A typical.

  • 0 in reply to Jeff F
    Prodigy 180 points

    Hello Jeff,

    Thanks for your reply. I just want to know if input voltage (wall adapter or usb) not connected and battery voltage goes bellow 2.5V, will output load will be disconnected from battery? This will save battery from being deep discharge?

    Thanks

    Asish

  • 0 in reply to Asish Banerjee
    TI__Guru**** 166176 points

    No.  The bq24165 relies on the battery's internal protector to prevent over-discharge.