TI bq27741－G1锂电池电量检测解决方案

TI 公司的bq27741-G1是用于单个电池组的锂电池电量检测集成电路,提供计于硬件的过压和欠压保护,充电时的过流保护以及短路保护.采用专利的Impedance Track™算法,提供剩余容量(mAh),充电状态(%),剩余工作时间,电池电压(mV)和温度(℃),主要用在智能手机,PDA,数码相机和摄像机,手持终端,MP3或多媒体播放器.本文介绍了bq27741-G1主要特性,两种参考应用电路以及bq27741-G1评估模块(EVM)特性, 和电池与系统负载/充电器连接图,电路图,材料清单和PCB元件布局图.
The Texas Instruments bq27741-G1 Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development for accurate battery fuel gauging. The fuel gauge resides within the battery pack or on the system’s main board with an embedded battery (non-removable). The fuel gauge provides hardware-based over- and undervoltage, overcurrent in charge or discharge, and short-circuit protections.
The fuel gauge uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (minimum), battery voltage (mV), and temperature (°C), as well as recording vital parameters throughout the lifetime of the battery.
The CSP is a 15-ball package (2.776 mm × 1.96 mm) that is ideal for space-constrained applications.
bq27741-G1主要特性:
Battery Fuel Gauge and Protector for 1-Series Li-Ion Applications
Microcontroller Peripheral Provides:
Accurate Battery Fuel Gauging Supports up to 32 Ahr
External and Internal Temperature Sensors for Battery
Temperature Reporting
Precision 16-bit High-Side Coulomb Counter with
High-Side Low-Value Sense Resistor (5 mΩ to 20 mΩ)
Lifetime and Current Data Logging
64 Bytes of Non-Volatile Scratch Pad Flash
SHA-1/HMAC Authentication
Battery Fuel Gauging Based on Patented Impedance Track Technology
Models Battery Discharge Curve for Accurate Time-To-Empty Predict...