FP8208A-3.5A同步开关模式降压型锂电池充电管理芯片  DataSheet
FP8208A应用说明  Application Note
描述：
FP8208A 是一款开关模式降压型锂电池充电管理芯片， 输入电压应用适合 5V 交流适配器， 可对单节锂离子电池进行定电流或是恒压充电， 其最大充电电流为 3.5A， 最大充电电流可由外部电阻进行设定， 在充电方面细分成 3 种式，包含了涓流模式、定电流模式与定电压模式。
FP8208A 集成了多项保护机制， 包含了内置输入欠压保护、 输入过压保护、 芯片过温保护、 电池短路保护、 电池温度监控。
特色说明：
➢ 输入工作电压范围 4.8V~5.5V
➢ 高精准截止电压： 4.2V±1%
➢ 可调式充电电流最高可达 3.5A
➢ 精准充电电流： ±8%
➢ 固定工作频率 720kHz
➢ 充电指示灯显示
➢ 自动再充电功能
➢ 多种保护功能： 输入欠压保护、输入过压保护、 芯片过温保护、 电池短路保护、 电池温度监控
➢ 封装 SOP-8L 带散热片
应用：
➢手持式装置、锂电池充电应用、 播放器、平板计算机、数码相机FP8208A-3.5A Synchronous Switch-Mode Li-Ion Battery Charger
General Description
The FP8208A is a highly integrated synchronous switch-mode Li-Ion Battery Charger. With few
external components, FP8208A is well suited for a wide range of portable applications. Charging
current can be programmed by an external current sensing resistor. With 720KHz switching frequency,
FP8208A can use of small external components. Other features include UVLO, automatic recharge,
charge status indicators and battery temperature monitor.
Features
Up to 3.5A Programmable Charge Current
Up to 92% Efficiency
Preset 4.2V Charge Voltage with ±1% Accuracy
Fixed Frequency Operation at 720kHz
Adjustable Charge Current using External Resistance Setting
No external MOSFET and Blocking Diode Required
Switch-model Charger for single cell Li-Ion Batteries
Input Voltage Regulation
Automatic Recharge
2.9V Trickle Charge Voltage
C/10 Charge Termination
Battery Over-Temperature Protection
Over-Voltage、 Over-Charge Current、 Battery Short and Thermal Protection
Charge Status Indicators for No Battery and Charge Failure Display
Applications
Portable Information Appliances
Charging Docks & Cradles
Cellular Phones & PDAs
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