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BQ25176K

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适用于单节锂离子和 LiFePO4 电池且支持 VINDPM 和 JEITA 标准的 800mA 线性充电器

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BQ25176K

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产品详情

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 0.8 Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3 Vin (max) (V) 25 Absolute max Vin (max) (V) 30 Control topology Linear Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.4, 4.58 Control interface Standalone (RC-Settable) Operating temperature range (°C) -40 to 125
Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 0.8 Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3 Vin (max) (V) 25 Absolute max Vin (max) (V) 30 Control topology Linear Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.4, 4.58 Control interface Standalone (RC-Settable) Operating temperature range (°C) -40 to 125
WSON (DSG) 8 4 mm² 2 x 2
  • Input voltage up to 30V tolerant
  • Input Voltage Based Dynamic Power Management (VINDPM)
  • Automatic Sleep Mode for low power consumption
    • 350nA battery leakage current
    • 80µA input leakage current when charge disabled
  • Supports 1-cell Li-Ion, Li-Poly, and LiFePO4
  • External resistor programmable operation
    • VSET to set battery regulation voltage:
      • Li-Ion: 4.05V, 4.35V, 4.4V, 4.53V, 4.58V
      • LiFePO4: 3.5V, 3.6V, 3.7V
    • ISET to set charge current from 10mA to 800mA
  • High accuracy
    • ±0.5% charge voltage accuracy
    • ±10% charge current accuracy
  • Charging features
    • Precharge current 20% of ISET
    • Termination current 10% of ISET
    • NTC thermistor input to monitor battery temperature
    • TS pin for charging operation control over JEITA range
    • Open-drain output for status and fault indication
  • Integrated fault protection
    • 26V IN overvoltage protection
    • VSET based OUT overvoltage protection
    • 1000mA overcurrent protection
    • 125°C thermal regulation; 150°C thermal shutdown protection
    • OUT short-circuit protection
    • VSET, ISET pins short/open protection
  • Input voltage up to 30V tolerant
  • Input Voltage Based Dynamic Power Management (VINDPM)
  • Automatic Sleep Mode for low power consumption
    • 350nA battery leakage current
    • 80µA input leakage current when charge disabled
  • Supports 1-cell Li-Ion, Li-Poly, and LiFePO4
  • External resistor programmable operation
    • VSET to set battery regulation voltage:
      • Li-Ion: 4.05V, 4.35V, 4.4V, 4.53V, 4.58V
      • LiFePO4: 3.5V, 3.6V, 3.7V
    • ISET to set charge current from 10mA to 800mA
  • High accuracy
    • ±0.5% charge voltage accuracy
    • ±10% charge current accuracy
  • Charging features
    • Precharge current 20% of ISET
    • Termination current 10% of ISET
    • NTC thermistor input to monitor battery temperature
    • TS pin for charging operation control over JEITA range
    • Open-drain output for status and fault indication
  • Integrated fault protection
    • 26V IN overvoltage protection
    • VSET based OUT overvoltage protection
    • 1000mA overcurrent protection
    • 125°C thermal regulation; 150°C thermal shutdown protection
    • OUT short-circuit protection
    • VSET, ISET pins short/open protection

The BQ25176K is an integrated 800mA linear charger for 1-cell Li-Ion, Li-Polymer, and LiFePO4 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 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 BQ25176K is an integrated 800mA linear charger for 1-cell Li-Ion, Li-Polymer, and LiFePO4 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 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.
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类型 标题 下载最新的英语版本 日期
* 数据表 BQ25176K: 800mA JEITA-Compliant Linear Battery Charger For 1-Cell Li-Ion and LiFePO4 With VINDPM and 4.5V Battery 数据表 PDF | HTML 2025年 8月 14日
EVM 用户指南 BQ25176K 评估模块 PDF | HTML 英语版 PDF | HTML 2025年 9月 16日

设计和开发

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评估板

BQ25176KEVM — BQ25176K 评估模块

BQ25176K 评估模块 (EVM) 包含 BQ25176K IC、LDO TPS7B8133 且评估板工作所需的支持电路。只需一个外部 5V 电源即可为 EVM 供电并为单节电池充电。可以使用开关 S1 将充电电压 VREG 设置为七个值。充电电流 (ISET) 通过 R22 阻值设置，范围为 60mA 至 750mA。固定值 400mA 由JP4 选择。

LDO U2 (TPS7B8133) 提供 3.3V 辅助控制电压，为 LED 供电并为 CE 提供电压。NTC 由 10k 电阻模拟，并且可以选择通过微调电位计进行调整。

用户指南: PDF | HTML
英语版: PDF | HTML
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WSON (DSG) 8 Ultra Librarian
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  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
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  • 制造厂地点
  • 封装厂地点

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