CXLB7327是一款适用于单电池锂离子电池的完整恒流/恒压线性充电器。此外，CXLB7327A专门设计用于USB电源规格。由于内部PMOSFET结构，无需外部感测电阻器，也无需阻塞二极管。热反馈调节充电电流，以限制高功率运行或高环境温度下的模具温度。充电电压固定在4.2V，充电电流可以用一个电阻在外部编程。达到最终浮充电压后，当充电电流降至编程值的1/10时，CXLB7327A自动终止充电循环。当输入电源（墙壁适配器或USB电源）被卸下时，CXLB7327A自动进入低电流状态，将电池放电电流降至小于2μa。CXLB7327A可进入关机模式，将电源电流降至55μa。其他功能包括充电电流监视器、欠压锁定，自动充电和状态
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产品概述
CXLB7327A is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. Furthermore the CXLB7327A is specifically designed to work within USB power specifications. No external sense resistor is needed and no blocking diode is required due to the internal PMOSFET architecture .Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature .The charge voltage is fixed at 4.2V,and the charge current can be programmed externally with a single resistor. The CXLB7327A automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed the CXLB7327A automatically enters a low current state dropping the battery drain current to less than 2μA.The CXLB7327A can be put into shutdown mode reducing the supply current to 55μA. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status.
产品特点
●Protection of battery cell reverse connection
●No MOSFET sense resistor or blocking diode required
●Complete Linear Charger in ThinSOT Package for Single Cell Lithium-Ion Batteries
●Constant-Current/Constant-Voltage operation with thermal regulation to maximize Rate Without risk of overheating.
● Preset 4.2V charge voltage with ±1% accuracy
● Automatic Recharge
●Charges Single Cell Li-Ion Batteries Directly from USB Port
●C/10 charge termination
● 55μA supply current in shutdown
● 2.9V trickle current charge threshold
● Soft-Start limits inrush current
●Charge Status Output Pin
●Available in SOT23-5 Package
应用范围
●Cellular Telephones, PDAs, MP3 Players
●Charging Docks and Cradles
●Bluetooth Applications
技术规格书（产品PDF)
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产品封装图
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相关芯片选择指南
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| Part Number | VFLOAT | VIN | Max Charger | Charger | Accu. | IQ | Package |
| Type | |||||||
| CXLB7326 | 4.2V | 4.25-6.5V | 800mA | Linear | ±1% | 25uA | SOT23-5 |
| CXLB7327 | 4.2V | 4.25-6.5V | 800mA | Linear | ±1% | 55uA | SOT23-5 |
| CXLB7328 | 4.2V | 4.25-6.5V | 800mA | Linear | ±1% | 55uA | SOT23-5 |
| CXLB7329 | 4.2V | 4.25-6.5V | 800mA | Linear | ±1% | 55uA | SOT23-6 |
| CXLB7330 | 4.2V/4.34V | 4.25-6.5V | 1000mA | Linear | ±1% | 55uA | ESOP8 |
| CXLB7331 | 4.2V/4.34V | 4.25-6.5V | 1000mA | Linear | ±1% | 55uA | ESOP8 |
| CXLB7332 | 8.4V/8.7V | 4.7-20V | 2000mA | Switch | ±1% | 10uA | SOP8 |
| CXLB7333 | 4.2V/4.34V | 4.7-5.5V | 2000mA | Switch | ±1% | 1uA | ESOP8 |
| Applications：①Mobile phone②MID③PDA④Battery Charger⑤Bluetooth equipment | |||||||
◀ 上一篇:独立线性单电池锂离子电池恒流恒压线性充电器CXLB7326可编程充电电流800mA自动充电状态输出引脚C/10充电终止软启动限制浪涌电流
下一篇▶:CXLB7328单节锂离子电池用恒定电流恒定电压线性充电器热反馈可对充电电流进行调节以便在大功率操作或高环境温度条件下对芯片温度加以限制
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