BQ21080 Series

800-mA Li-ion and LiFePO4 I²C programmable linear charger with regulated power path in WCSP package

Catalog

800-mA Li-ion and LiFePO4 I²C programmable linear charger with regulated power path in WCSP package

Part	Package / Case	Package Name	Package Width	Package Length	Battery Chemistry	Battery Pack Voltage (Min)	Battery Pack Voltage (Max)	Mounting Type	Voltage - Supply (Max)	Fault Protection	Operating Temperature (Max)	Operating Temperature (Min)	Number of Cells	Programmable Features	Charge Current - Max	Interface	Current - Charging
Texas Instruments BQ21080YBGR	8-XFBGA DSBGA	8-DSBGA	1.1 mm	1.6 mm	Multi-Chemistry	2.2 V	4.6 V	Surface Mount	5.5 V	Over Current Over Temperature Over-Under Voltage Short Circuit	85 °C	-40 °C	1	Current Timer Voltage	800 mA	I2C	Constant Programmable

Catalog

800-mA Li-ion and LiFePO4 I²C programmable linear charger with regulated power path in WCSP package

Description

The BQ21080 is a linear battery charger IC focusing on small solution size and low quiescent current for extending battery life. The device is available in an 8-ball chipscale package which does not need HDI PCB process for fabrication thereby reducing the PCB cost. The device can support up to 800-mA charging and system loads of up to 2.5 A. The battery is charged using a standard Li-ion or LiFePO4 charge profile with three phases: precharge, constant current and constant voltage. Thermal regulation provides the maximum charge current while managing the device temperature. The charger is also optimized for battery to battery charging with 3-V minimum input voltage operation and can withstand 25-V absolute maximum line transients. The device integrates a single push-button input and reset circuitry to reduce the total solution footprint. The BQ21080 is a linear battery charger IC focusing on small solution size and low quiescent current for extending battery life. The device is available in an 8-ball chipscale package which does not need HDI PCB process for fabrication thereby reducing the PCB cost. The device can support up to 800-mA charging and system loads of up to 2.5 A. The battery is charged using a standard Li-ion or LiFePO4 charge profile with three phases: precharge, constant current and constant voltage. Thermal regulation provides the maximum charge current while managing the device temperature. The charger is also optimized for battery to battery charging with 3-V minimum input voltage operation and can withstand 25-V absolute maximum line transients. The device integrates a single push-button input and reset circuitry to reduce the total solution footprint.