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General Description: <BR><BR>The CN3051B/CN3052B is a complete constant-current /constant voltage linear charger for single cell Li-ion and Li Polymer rechargeable batteries. The device contains an on-chip power MOSFET and eliminates the need for the external sense resistor and blocking diode. Furthermore, the <BR>CN3051B/CN3052B is specifically designed to work within USB power specifications. Its low external component count makes CN3051B/CN3052B ideally suited for portable applications. <BR><BR>Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The regulation voltage is fixed at 4.1V(CN3051B) or 4.2V(CN3052B) with 1% accuracy. The charge current can be programmed externally with a single resistor. When the input supply (wall adapter or USB supply) is removed, the CN3051B/CN3052B automatically enters a low power sleep mode , dropping the battery drain current to less than 3uA. Other features include undervoltage lockout, automatic recharge, chip enable function, battery <BR>temperature sensing and a pin to indicate charge status. <BR><BR>The CN3051B/CN3052B is available in 8-pin MSOP package(MSOP8). <BR><BR> <BR>Applications: <BR><BR>.. MP3 Players <BR>.. Bluetooth Applications <BR>.. Toys <BR>.. USB Bus-Powered Chargers <BR><BR>Features: <BR><BR>.. Charges Single Cell Li-Ion Batteries Directly from USB Port or AC Adaptor <BR>.. On-chip Power MOSFET <BR>.. No external Blocking Diode or Current Sense Resistors Required <BR>.. Preset 4.1V or 4.2V Regulation Voltage with 1% Accuracy <BR>.. Precharge Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage of Charge <BR>.. Programmable Charge Current Up to 150mA <BR>.. Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating <BR>.. Automatic Low-Power Sleep Mode When Input Supply Voltage is Removed <BR>.. Status Indication for LEDs or uP Interface <BR>.. C/10 Charge Termination <BR>.. Automatic Recharge <BR>.. Battery Temperature Sensing <BR>.. Chip Enable Input <BR>.. Available in MSOP8 Package <BR>.. Pb-free Available<BR><BR>(中文) <BR>150毫安USB接口兼容的线性锂离子电池充电器电路---CN3051B/CN3052B<BR>特点:<BR>CN3051B/CN3052B: <BR> -可以用USB口或交流适配器对单节锂离子或者锂-聚合物电池充电 <BR> -片内功率晶体管 <BR> -不需要外部阻流二极管和电流检测电阻 <BR> -输出电压4.1V或4.2V,精度可达1% <BR> -在电池电压较低时采用小电流的预充电模式充电 <BR> -用户可编程的恒流充电电流可达150mA <BR> -采用恒流/恒压/恒温模式充电,既可以使充电电流最大化,又可以防止芯片过热 <BR> -电源电压掉电时自动进入低功耗的睡眠模式 <BR> -状态指示输出可驱动LED或与单片机接口 <BR> -C/10充电结束检测 <BR> -自动再充电 <BR> -电池温度监测功能 <BR> -封装形式MSOP8 <BR> -应用: <BR> 1. MP3播放器 <BR> 2. 蓝牙应用 <BR> 3. 玩具 <BR> 4. 锂电池充电器<BR><BR>详细资料或免费样品申请:hai-kl@163.com 段先生 0755-26067356<BR>