原标题：On Semi LC709203F单个锂电池电量检测方案

　　On Semi公司的LC709203F是用于手持设备的单个锂电池电量检测集成电路(IC),具有高精度电池电量检测和精密电压测量,不需要外接电阻,支持高达400kHz的I2C接口和低功耗,主要用在无线手机,智能手机/PDA设备,MP3播放器,数码相机,手持游戏机和USB相关设备.本文介绍了LC709203F主要特性和典型应按用电路,以及带或不带温度检测功能的LC709203F(WLCSP9)评估板电路图,材料清单和PCB布局图.

　　The LC709203F is an IC that measures the remaining power level of 1-cell lithium-ion (Li+) batteries used for a portable equipment etc. This product is able to reduce a fuel gauge errors by implementing its unique correction technology for measurement value of battery temperature and voltage. It is possible for this to realize high precision for measurement in battery power measurement IC that does not need a current sensing resistor.

　　LC709203F主要特性:

　　High accuracy of remaining battery power measurements

　　Precision Voltage Measurement

　　No external sense resistor

　　Alert function

　　Interface : I2C Interface (up to 400 kHz supported)

　　Low power consumption

　　Corresponding battery models for various battery electrode materials

　　Ports

　　I2C communication pin : 2 (SDA, SCL)

　　Battery temperature reading control pin : 1 (TSW)

　　Analog voltage input pin for battery temperature : 1 (TSENSE)

　　External alarm / Interrupt for Low-Battery warning : 1 (ALARMB)

　　Power supply pin : 2 (VSS, VDD)

　　LC709203F应用:

　　Wireless Handsets

　　Smartphones / PDA devices

　　MP3 players

　　Digital cameras

　　Portable Game Players

　　USB-related devices

　　图1. LC709203F应用电路:没有温度检测功能

　　图2. LC709203F应用电路:有温度检测功能

　　图3. LC709203F(WLCSP9)评估板外形图

　　图4. LC709203F(WLCSP9)评估板电路图:没有温度检测功能

　　图5. LC709203F(WLCSP9)评估板电路图:有温度检测功能

　　LC709203F(WLCSP9)评估板材料清单: