1安培USB接口兼容的线性锂离子电池充电器电路 (CN3056)
2006/8/22 18:36:25
深圳市勤创电子有限公司 供稿
General Description:
The CN3056 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 CN3056 is specifically designed to work within USB power specifications. Its low external component count makes CN3056 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 4.2V 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 CN3056 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 CN3056 is available in 10 pin QFN package.
Applications:
.. Cellular Telephones
.. Digital Still Cameras
.. MP3 Players
.. Bluetooth Applications
.. Portable Devices
.. USB Bus-Powered Chargers
.. 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 4.2V 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 1A
.. 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 10 pin QFN Package
.. Pb-free Available
概述：
CN3056是可以对单节锂离子或者锂-聚合物可充电电池进行恒流/恒压充电的充电器电路。该器件内部包括功率晶体管，应用时不需要外部的电流
检测电阻和阻流二极管。CN3056只需要极少的外围元器件，并且符合USB总线技术规范，非常适用于便携式应用的领域。热调制电路可以在器件的功耗比较大或者环境温度比较高的时候将芯片温度控制在安全范围内。调制输出电压为4.2V，精度达1%。充电电流的大小可以通过一个外部电阻调整。当输入电压（交流适配器或者USB电源）
掉电时，CN3056自动进入低功耗的睡眠模式，此时电池的电流消耗小于3微安。其它功能包括输入电压过低检测，自动再充电，芯片使能输入端，电池温度监控以及状态指示等功能。
CN3056采用热处理能力较强的10管脚QFN封装。
应用：
.. 移动电话
.. 数码相机
.. MP3播放器
.. 蓝牙应用
.. 电子词典
.. 便携式设备
.. 各种充电器
特点：
.. 可以用USB口或交流适配器对单节锂离子或者锂-聚合物可充电电池充电
.. 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4.2V，精度可达1%
.. 为了激活深度放电的电池和减小功耗，在电池电压较低时采用小电流的预充电模式
.. 用户可编程的恒流充电电流可达1A
.. 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
.. 芯片使能输入端
.. 封装形式：10管脚QFN封装
.. 无铅产品
详细说明及样片申请：
hai-kl@163.com 段先生 13510249962
The CN3056 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 CN3056 is specifically designed to work within USB power specifications. Its low external component count makes CN3056 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 4.2V 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 CN3056 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 CN3056 is available in 10 pin QFN package.
Applications:
.. Cellular Telephones
.. Digital Still Cameras
.. MP3 Players
.. Bluetooth Applications
.. Portable Devices
.. USB Bus-Powered Chargers
.. 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 4.2V 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 1A
.. 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 10 pin QFN Package
.. Pb-free Available
概述：
CN3056是可以对单节锂离子或者锂-聚合物可充电电池进行恒流/恒压充电的充电器电路。该器件内部包括功率晶体管，应用时不需要外部的电流
检测电阻和阻流二极管。CN3056只需要极少的外围元器件，并且符合USB总线技术规范，非常适用于便携式应用的领域。热调制电路可以在器件的功耗比较大或者环境温度比较高的时候将芯片温度控制在安全范围内。调制输出电压为4.2V，精度达1%。充电电流的大小可以通过一个外部电阻调整。当输入电压（交流适配器或者USB电源）
掉电时，CN3056自动进入低功耗的睡眠模式，此时电池的电流消耗小于3微安。其它功能包括输入电压过低检测，自动再充电，芯片使能输入端，电池温度监控以及状态指示等功能。
CN3056采用热处理能力较强的10管脚QFN封装。
应用：
.. 移动电话
.. 数码相机
.. MP3播放器
.. 蓝牙应用
.. 电子词典
.. 便携式设备
.. 各种充电器
特点：
.. 可以用USB口或交流适配器对单节锂离子或者锂-聚合物可充电电池充电
.. 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4.2V，精度可达1%
.. 为了激活深度放电的电池和减小功耗，在电池电压较低时采用小电流的预充电模式
.. 用户可编程的恒流充电电流可达1A
.. 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
.. 芯片使能输入端
.. 封装形式：10管脚QFN封装
.. 无铅产品
详细说明及样片申请：
hai-kl@163.com 段先生 13510249962
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本文链接：1安培USB接口兼容的线性锂离子电池充
http:www.cps800.com/news/2006-8/2006822183625.html
http:www.cps800.com/news/2006-8/2006822183625.html
文章标签： 充电IC/充电方案
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