BQ25176M Series
800-mA linear battery charger for one-cell Li-ion and LiFePO4 with VINDPM
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
800-mA linear battery charger for one-cell Li-ion and LiFePO4 with VINDPM
| Part | Number of Cells | Charge Current - Max [Max] | Fault Protection | Programmable Features | Battery Pack Voltage | Mounting Type | Package / Case | Supplier Device Package | Voltage - Supply (Max) [Max] | Operating Temperature [Max] | Operating Temperature [Min] | Battery Chemistry | Current - Charging |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ25176MDSGR | 1 | 800 mA | Over Current, Over Temperature, Over Voltage, Short Circuit | Current, Voltage | 4.4 V | Surface Mount | 8-WFDFN Exposed Pad | 8-WSON (2x2) | 18 V | 125 ¯C | -40 °C | Multi-Chemistry | Constant - Programmable |
Key Features
• Input voltage up to 30 V tolerantInput Voltage Based Dynamic Power Management (VINDPM) tracking battery voltageAutomatic Sleep Mode for low power consumption350-nA battery leakage current80-µA input leakage current when charge disabledSupports 1-cell Li-Ion, Li-Poly, and LiFePO4External resistor programmable operationVSET to set battery regulation voltage:Li-Ion: 4.05 V, 4.15 V, 4.2 V, 4.35 V, 4.4 VLiFePO4: 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 ISETBattery tracking input voltage dynamic power management (VINDPM) for solar chargingBIAS pin for charging function controlOpen-drain output for status and fault indicationOpen-drain output for power good indicationIntegrated fault protection18.1-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) tracking battery voltageAutomatic Sleep Mode for low power consumption350-nA battery leakage current80-µA input leakage current when charge disabledSupports 1-cell Li-Ion, Li-Poly, and LiFePO4External resistor programmable operationVSET to set battery regulation voltage:Li-Ion: 4.05 V, 4.15 V, 4.2 V, 4.35 V, 4.4 VLiFePO4: 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 ISETBattery tracking input voltage dynamic power management (VINDPM) for solar chargingBIAS pin for charging function controlOpen-drain output for status and fault indicationOpen-drain output for power good indicationIntegrated fault protection18.1-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
AI
The BQ25176M is an integrated 800-mA linear solar charger for 1-cell Li-Ion, Li-Polymer, and LiFePO4batteries with continual charge mode and battery tracking VINDPM. The device has a single power output that charges the battery. 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 VBAT_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, 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 charge voltage and fast charge current are programmable through external resistors. The precharge and termination current threshold track the fast charge current setting.
The BQ25176M is an integrated 800-mA linear solar charger for 1-cell Li-Ion, Li-Polymer, and LiFePO4batteries with continual charge mode and battery tracking VINDPM. The device has a single power output that charges the battery. 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 VBAT_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, 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 charge voltage and fast charge current are programmable through external resistors. The precharge and termination current threshold track the fast charge current setting.