LTC2942

• Product Introduction

LTC2942 battery power measurement chip with temperature and voltage measurement functions

peculiarity

• 可指示累积的电池充电和放电电量
• 高准确度模拟积分
• ADC 负责测量电池电压和温度
• 集成温度sensor
• 高端检测
• 1% 电压和充电准确度
• ±50mV 检测电压范围
• SMBus / I²C 接口
• 可配置报警输出 / 充电完成输入
• 2.7V 至 5.5V 工作范围
• 静态电流小于 100μA
• 小外形 6 引脚 2mm x 3mm DFN 封装
•  

description

The LTC®2942 measures battery state of charge, battery voltage, and chip temperature in handheld PC and portable product applications. Its operating range is ideal for single-cell lithium-ion batteries. An accurate coulomb meter integrates the current flowing through a sense resistor located between the positive end of the battery and the load or charger. Battery voltage and on-chip temperature are measured using an internal 14-bit No Latency ΔΣTM ADC. The three measured physical parameter values (charge, voltage, and temperature) are stored in internal registers that can be accessed via the SMBus/I2C interface on the board.

LTC2942 Features programmable high and low thresholds for all three measured physical quantities. If a programming threshold is exceeded, the device will use the SMBus alarm protocol or send an alarm signal by setting a mark in the internal status register.

LTC2942 Only a single low-resistance sense resistor is required to set the measurement current range. 

apply

• 低功率手持式产品
• 蜂窝电话
• MP3 播放器
• 照相机
• GPS