BQ27425YZFR-G2A

bq27425是一款易于配置的微控制器外设，提供针对单节锂离子电池的系统侧电量监测。此器件要求最小用户配置和系统微控制器固件开发。 bq27425采用获专利的Impedance Track算法支持电量监测，可提供剩余电池容量 (mAh)，充电状态 (%) 和电池电压 (mV) 等信息。 通过bq27425进行电池电量监测只需将PACK+ (P+) 与PACK- (P-) 连接至可拆卸电池组或嵌入式电池电路。15引脚2.69mm×1.75mm，0.5mm焊球间距CSP封装非常适合于空间受限类应用。 The bq27425 accurately predicts the battery capacity and other operational characteristics of a single Li-based rechargeable cell. It can be interrogated by a system processor to provide cell information, such as state-ofcharge (SOC). Information is accessed through a series of commands, called Standard Commands. Further capabilities are provided by the additional Extended Commands set. Both sets of commands, indicated by the general format Command( ), are used to read and write information contained within the bq27425 control and status registers, as well as its data locations. Commands are sent from system to gauge using the bq27425’s I²C serial communications engine, and can be executed during application development, system manufacture, or endequipment operation. The key to the bq27425’s high-accuracy gas gauging prediction is Texas Instrument’s proprietary Impedance Track algorithm. This algorithm uses cell measurements, characteristics, and properties to create state-ofcharge predictions that can achieve high accuracy across a wide variety of operating conditions and over the lifetime of the battery.

• 单节串联锂离子电池电量计
• 驻留在系统主板上
• 支持嵌入式或可拆除电池
• 由具有集成低压降稳压器(LDO)的电池直接供电
• 低值集成感测电阻器（典型值10mΩ)
• 根据已获专利的ImpedanceTrack技术可以很轻松的进行电量计量监测
• 用平滑滤波器报告剩余电量和充电状态 (SOC) 针对电池老化、温度和速率变化进行自动调节 电池健康状况（老化）估计
• 微控制器外设支持：
• 400kHz I²C串行接口
• 可配置的SOC中断，或电池低数字输出报警
• 内部温度传感器，或主机报告的温度
• 15引脚2.69mmx1.75mm，0.5mm焊球间距CSP封装

• 智能手机、功能型手机和平板电脑
• 数码相机与数码摄像机
• 手持终端设备
• MP3或多媒体播放器