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電池管理 IC
電池充電器 IC

BQ25170

現行

適用於單節鋰離子和磷酸鐵鋰電池的 800mA 線性電池充電器

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產品規格表

BQ25170

現行
產品規格表 立即訂購

產品詳細資料

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 (hot/cold profile), IC thermal regulation Vin (min) (V) 3 Vin (max) (V) 6.5 Absolute max Vin (max) (V) 30 Control topology Linear Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.4 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 (hot/cold profile), IC thermal regulation Vin (min) (V) 3 Vin (max) (V) 6.5 Absolute max Vin (max) (V) 30 Control topology Linear Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.4 Control interface Standalone (RC-Settable) Operating temperature range (°C) -40 to 125
WSON (DSG) 8 4 mm² (2 mm × 2 mm)
  • Input voltage up-to 30-V tolerant
  • Automatic Sleep Mode for low power consumption
    • 350-nA battery leakage current
    • 85-µA 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: 4.05 V, 4.1 V, 4.2 V, 4.35 V, 4.4 V
      • LiFePO4: 3.5 V, 3.6 V, 3.7 V
    • ISET to set charge current from 10 mA to 800 mA
  • 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 function control
    • Open-drain output for status and fault indication
    • Open-drain output for power good indication
  • Integrated fault protection
    • 6.6-V IN overvoltage protection
    • VSET based OUT overvoltage protection
    • 1000-mA 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 30-V tolerant
  • Automatic Sleep Mode for low power consumption
    • 350-nA battery leakage current
    • 85-µA 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: 4.05 V, 4.1 V, 4.2 V, 4.35 V, 4.4 V
      • LiFePO4: 3.5 V, 3.6 V, 3.7 V
    • ISET to set charge current from 10 mA to 800 mA
  • 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 function control
    • Open-drain output for status and fault indication
    • Open-drain output for power good indication
  • Integrated fault protection
    • 6.6-V IN overvoltage protection
    • VSET based OUT overvoltage protection
    • 1000-mA overcurrent protection
    • 125°C thermal regulation; 150°C thermal shutdown protection
    • OUT short-circuit protection
    • VSET, ISET pins short/open protection

The BQ25170 is an integrated 800-mA 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 three phases for charging a Li-Ion 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 charge voltage and fast charge current are programmable through external resistors. The precharge and termination current threshold track the fast charge current setting.

The BQ25170 is an integrated 800-mA 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 three phases for charging a Li-Ion 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 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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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 BQ25170: 800-mA Linear Battery Charger for 1-Cell Li-Ion, and LiFePO4 datasheet (Rev. A) PDF | HTML 2021/4/14
應用說明 Designing the TS Pin Network for Battery Chargers with Current-Based Battery NTC Temperature Sensing PDF | HTML 2026/6/22
應用說明 LiFePO4 Design Considerations PDF | HTML 2023/7/26
功能安全資訊 BQ25170 Pin FMA PDF | HTML 2022/5/24
應用說明 BQ25171-Q1 Quick Start Guide PDF | HTML 2021/9/29
證書 BQ25170EVM EU Declaration of Conformity (DoC) 2020/8/13

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開發板

BQ25170EVM — BQ25170 評估模組，適用於單芯鋰離子、鋰聚合物及磷酸鐵鋰的 800-mA 線性電池充電器

BQ25170EVM 的設計目的在於協助使用者評估和測試 BQ25170 裝置的各種運作模式。使用指南內容涵蓋評估模組的硬體設定說明、電路圖、物料清單 (BOM) 和 PCB 佈線圖。 
使用指南: PDF
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