BQ25175 Series

Standalone 1-cell 800-mA linear battery charger in a WCSP package

Catalog

Standalone 1-cell 800-mA linear battery charger in a WCSP package

Part	Supplier Device Package	Package / Case	Charge Current - Max [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Programmable Features	Battery Chemistry	Battery Pack Voltage	Mounting Type	Current - Charging	Fault Protection	Number of Cells
Texas Instruments BQ25175YBGR	6-DSBGA	6-XFBGA DSBGA	800 mA	85 °C	-40 °C	Current	Lithium Ion/Polymer	4.35 V	Surface Mount	Constant - Programmable	Over Current Over Temperature Over Voltage Short Circuit	1

Catalog

Standalone 1-cell 800-mA linear battery charger in a WCSP package

Key Features

• Input voltage up to 30-V tolerantAutomatic Sleep Mode for low power consumption350-nA battery leakage current80-µA input leakage current when charge disabledSupports 1-cell Li-Ion, and Li-PolyFixed 4.35-V battery regulation voltageExternal resistor programmable operationISET 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 temperatureCold and hot temperature charging disabledCool temperature charging at 20% of ISETTS pin for charging function controlOpen-drain output for status and fault indicationIntegrated fault protection6.6-V IN overvoltage protection1000-mA overcurrent protection125°C thermal regulation; 150°C thermal shutdown protectionOUT short-circuit protectionISET pin short/open protectionInput voltage up to 30-V tolerantAutomatic Sleep Mode for low power consumption350-nA battery leakage current80-µA input leakage current when charge disabledSupports 1-cell Li-Ion, and Li-PolyFixed 4.35-V battery regulation voltageExternal resistor programmable operationISET 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 temperatureCold and hot temperature charging disabledCool temperature charging at 20% of ISETTS pin for charging function controlOpen-drain output for status and fault indicationIntegrated fault protection6.6-V IN overvoltage protection1000-mA overcurrent protection125°C thermal regulation; 150°C thermal shutdown protectionOUT short-circuit protectionISET pin short/open protection

Description

The BQ25175 is an integrated 800-mA linear charger for 1-cell Li-Ion and Li-Poly batteries. 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 three phases for charging a Li-Ion/Li-Poly battery: 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, TREG, 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 fast charge current is programmable through an external resistor. The precharge and termination current thresholds track the fast charge current setting. The BQ25175 is an integrated 800-mA linear charger for 1-cell Li-Ion and Li-Poly batteries. 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 three phases for charging a Li-Ion/Li-Poly battery: 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, TREG, 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 fast charge current is programmable through an external resistor. The precharge and termination current thresholds track the fast charge current setting.