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| LC709203F 单个锂电池电量检测方案 |
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| 文章来源： 更新时间：2014/4/19 9:36:00 |
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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:
图6. LC709203F(WLCSP9)评估板PCB布局图:顶层
图7. LC709203F(WLCSP9)评估板PCB布局图:底层
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