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General Description:
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
CN3051B/CN3052B is specifically designed to work within USB power specifications. Its low external component count makes CN3051B/CN3052B ideally suited for portable applications.
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
temperature sensing and a pin to indicate charge status.
The CN3051B/CN3052B is available in 8-pin MSOP package(MSOP8).
Applications:
.. MP3 Players
.. Bluetooth Applications
.. Toys
.. USB Bus-Powered Chargers
Features:
.. Charges Single Cell Li-Ion Batteries Directly from USB Port or AC Adaptor
.. On-chip Power MOSFET
.. No external Blocking Diode or Current Sense Resistors Required
.. Preset 4.1V or 4.2V Regulation Voltage with 1% Accuracy
.. Precharge Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage of Charge
.. Programmable Charge Current Up to 150mA
.. Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating
.. Automatic Low-Power Sleep Mode When Input Supply Voltage is Removed
.. Status Indication for LEDs or uP Interface
.. C/10 Charge Termination
.. Automatic Recharge
.. Battery Temperature Sensing
.. Chip Enable Input
.. Available in MSOP8 Package
.. Pb-free Available
(中文)
150毫安USB接口兼容的线性锂离子电池充电器电路---CN3051B/CN3052B
特点：
CN3051B/CN3052B:
-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
-片内功率晶体管
-不需要外部阻流二极管和电流检测电阻
-输出电压4.1V或4.2V，精度可达1%
-在电池电压较低时采用小电流的预充电模式充电
-用户可编程的恒流充电电流可达150mA
-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
-电源电压掉电时自动进入低功耗的睡眠模式
-状态指示输出可驱动LED或与单片机接口
-C/10充电结束检测
-自动再充电
-电池温度监测功能
-封装形式MSOP8
-应用：
1. MP3播放器
2. 蓝牙应用
3. 玩具
4. 锂电池充电器
详细资料或免费样品申请：hai-kl@163.com 段先生 0755-26067356
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