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参数

Number of series cells 1, 2, 3, 4, 5, 6 Charge current (Max) (A) 0.8 Operating Vin (Max) (V) 18 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiMH Battery charge voltage (Min) (V) 3.5 Battery charge voltage (Max) (V) 8.4 Absolute Vin (safety rating) (Max) ((V)) 40 Control topology Linear Control interface Standalone, Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP Operating Vin (Min) (V) 3 Rating Automotive open-in-new 查找其它 电池充电器IC

封装|引脚|尺寸

VSON (DRC) 10 9 mm² 3 x 3 open-in-new 查找其它 电池充电器IC

特性

  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C ≤ TA ≤ 125°C
    • HBM ESD classification level 2
    • CDM ESD classification level C4B
  • 40-V load-dump tolerant to support charging back-up battery directly from main battery, 3-V to 18-V operating
  • Automatic Sleep Mode for low power consumption
    • 350-nA battery leakage current
    • 2-µA input leakage current when charge disabled
  • Support multi-chemistry battery
    • 1- to 2-cell Li-Ion, Li-Poly, and LiFePO4
    • 1- to 6-cell NiMH with intermittent-charging support
  • External resistor programmable operation
    • VSET to set battery regulation voltage from 3.5 V to 8.4 V for Li-Ion, or 1- to 6-cell for NiMH
    • ISET to set charge current from 10mA to 800mA
    • CHM_TMR to set battery chemistry as Li+ or NiMH, and charge timer duration
  • 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
    • CE pin for charging function control
    • Two Open-drain output for status and fault indication
  • Integrated fault protection
    • 18-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, CHM_TMR pins short/open protection

All trademarks are the property of their respective owners.

open-in-new 查找其它 电池充电器IC

描述

The BQ25171-Q1 is an automotive rated, 800-mA linear charger for 1-cell and 2-cell Li-Ion, Li-Polymer, and LiFePO4, in addition to 1-cell up to 6-cell NiMH battery 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.

The device charges a NiMH in constant current mode only, and terminates the charge cycle when the programmable timer expires or the battery voltage exceeds the VOUT_OVP threshold. 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.

open-in-new 查找其它 电池充电器IC
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技术文档

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类型 标题 下载最新的英文版本 日期
* 数据表 BQ25171-Q1: Automotive, Standalone 800-mA Linear Battery Charger for 1- to 2-Cell Li-Ion, LiFePO4, and 1- to 6-Cell NiMH 数据表 (Rev. A) 2021年 3月 29日
技术文章 When to use rechargeable batteries in small battery applications 2019年 10月 1日
技术文章 Should I use a linear charger or a switching charger? 2015年 10月 31日
技术文章 Summertime and the livin' is easy 2014年 6月 20日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

硬件开发

评估板 下载
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说明
BQ25171EVM 评估模块 (EVM) 旨在帮助用户评估和测试 BQ25171 器件的各种工作模式。
特性
  • 用于评估小型线性充电器的完整解决方案,该充电器可为单节锂离子或 LiFePO4 电池提供高达 800mA 的电流
  • 可使用开关选择常用配置
  • 可与 TS 感应共同在较宽范围内调整充电电流

CAD/CAE 符号

封装 引脚 下载
VSON (DRC) 10 了解详情

订购与质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/FIT 估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

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