BQ25176J Series

800-mA linear charger for one-cell Li-ion and LiFePO4 with VINDPM and JEITA

Catalog

800-mA linear charger for one-cell Li-ion and LiFePO4 with VINDPM and JEITA

Part	Current - Charging	Fault Protection	Charge Current - Max [Max]	Programmable Features	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Voltage - Supply (Max) [Max]	Mounting Type	Battery Chemistry	Package / Case	Number of Cells	Battery Pack Voltage
Texas Instruments BQ25176JDSGR	Constant - Programmable	Over Current Over Temperature Over-Under Voltage Short Circuit	800 mA	Current Timer Voltage	-40 °C	125 ¯C	8-WSON (2x2)	25 V	Surface Mount	Multi-Chemistry	8-WFDFN Exposed Pad	1	4.4 V

Catalog

800-mA linear charger for one-cell Li-ion and LiFePO4 with VINDPM and JEITA

Key Features

• Input voltage up to 30 V tolerantInput Voltage Based Dynamic Power Management (VINDPM)Automatic Sleep Mode for low power consumption350-nA battery leakage current80-µA input leakage current when charge disabledSupports 1-cell Li-Ion, Li-Poly, and LiFePO 4External resistor programmable operationVSET to set battery regulation voltage:Li-Ion: 4.05 V, 4.15 V, 4.2 V, 4.35 V, 4.4 VLiFePO 4: 3.5 V, 3.6 V, 3.7 VISET to set charge current from 10 mA to 800 mAHigh accuracy±0.5% charge voltage accuracy±10% charge current accuracyCharging featuresPrecharge current 20% of ISETTermination current 10% of ISETNTC thermistor input to monitor battery temperatureTS pin for charging operation control over JEITA rangeOpen-drain output for status and fault indicationIntegrated fault protection26-V IN overvoltage protectionVSET based OUT overvoltage protection1000-mA overcurrent protection125°C thermal regulation; 150°C thermal shutdown protectionOUT short-circuit protectionVSET, ISET pins short/open protectionInput voltage up to 30 V tolerantInput Voltage Based Dynamic Power Management (VINDPM)Automatic Sleep Mode for low power consumption350-nA battery leakage current80-µA input leakage current when charge disabledSupports 1-cell Li-Ion, Li-Poly, and LiFePO 4External resistor programmable operationVSET to set battery regulation voltage:Li-Ion: 4.05 V, 4.15 V, 4.2 V, 4.35 V, 4.4 VLiFePO 4: 3.5 V, 3.6 V, 3.7 VISET to set charge current from 10 mA to 800 mAHigh accuracy±0.5% charge voltage accuracy±10% charge current accuracyCharging featuresPrecharge current 20% of ISETTermination current 10% of ISETNTC thermistor input to monitor battery temperatureTS pin for charging operation control over JEITA rangeOpen-drain output for status and fault indicationIntegrated fault protection26-V IN overvoltage protectionVSET based OUT overvoltage protection1000-mA overcurrent protection125°C thermal regulation; 150°C thermal shutdown protectionOUT short-circuit protectionVSET, ISET pins short/open protection

Description

The BQ25176J is an integrated 800-mA linear charger for 1-cell Li-Ion, Li-Polymer, and LiFePO 4 batteries targeted at space-limited portable applications. The device has a single power output that charges the battery. The system load can be placed in parallel with the battery, as long as the average system load does not prevent the battery from charging fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery. The device has four phases for charging a Li-Ion/Li-Poly battery: trickle charge to bring the battery voltage up to V BAT_SHORT, precharge to recover a fully discharged battery, fast-charge constant current to supply the bulk of the charge, and voltage regulation to reach full capacity. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold, T REG, is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and automatic charge termination. The charge voltage and fast charge current are programmable through external resistors. The precharge and termination current threshold track the fast charge current setting. The BQ25176J is an integrated 800-mA linear charger for 1-cell Li-Ion, Li-Polymer, and LiFePO 4 batteries targeted at space-limited portable applications. The device has a single power output that charges the battery. The system load can be placed in parallel with the battery, as long as the average system load does not prevent the battery from charging fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery. The device has four phases for charging a Li-Ion/Li-Poly battery: trickle charge to bring the battery voltage up to V BAT_SHORT, precharge to recover a fully discharged battery, fast-charge constant current to supply the bulk of the charge, and voltage regulation to reach full capacity. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold, T REG, is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and automatic charge termination. The charge voltage and fast charge current are programmable through external resistors. The precharge and termination current threshold track the fast charge current setting.