CXLB7265是一款恒流、恒压锂离子电池充电器控制器，采用电流模式PWM降压（buck）开关结构。CXLB7265具有500kHz的开关频率，为一节（4.2V）或两节（8.4V）锂离子电池提供了一种小型、简单、高效的快速充电解决方案。CXLB7265对蓄电池进行三相充电：调节、恒流和恒压。外部感测电阻器以±10%的精度设置充电电流。内部电阻分压器和精密基准将每个电池的最终浮充电压设置为4.2V，精度为±1%。内部比较器检测接近充电结束的情况，而内部定时器设置总充电时间并终止充电周期。如果电池电压低于内部阈值（每个电池4.05V），CXLB7265会自动重新开始充电。当断开直流电源时，CXLB7265也会自动进入休眠模式。CXLB7265在8铅标准操作程序包中提供
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目录
产品概述 返回TOP
The CXLB7265 is a constant current, constant voltage Li-Ion battery charger controller that uses a current mode PWM step-down (buck) switching architecture. With a 500kHz switching frequency, the CXLB7265 provides a small, simple and efficient solution to fast charge one (4.2V) or two (8.4V) cell lithium-ion batteries. The CXLB7265 charges the battery in three phases: conditioning, constant current, and constant voltage. An external sense resistor sets the charge current with ±10% accuracy. An internal resistor divider and precision reference set the final float voltage to 4.2V per cell with ± 1% accuracy. An internal comparator detects the near end-of-charge condition while an internal timer sets the total charge time and terminates the charge cycle. The CXLB7265 automatically re-starts the charge if the battery voltage falls below an internal threshold, 4.05V per cell. The CXLB7265also automatically enters sleep mode when DC supplies are removed. The CXLB7265is available in the 8-lead SOP package
产品特点 返回TOP
Wide Input Supply Voltage Range:
4.8V to 20V – 4.2 Version
8.9V to 20V – 8.4 Version
8.9V to 20V – 8.34 Version
500kHz Switching Frequency
End-of-Charge Current Detection Output
12 Hour Charge Termination Timer
±1% Charge Voltage Accuracy
±10% Charge Current Accuracy
Low 10μA Reverse Battery Drain Current
Automatic Battery Recharge
Automatic Trickle Charging of Low Voltage Batteries
Automatic Sleep Mode for Low Power Consumption
Battery Temperature Sensing
Stable with Ceramic Output Capacitor
Support up to 3A Charge Current
8-Lead SOP Package
RoHS Compliant and 100% Lead (Pb)-Free Halogen-Free
应用范围 返回TOP
Small Notebook Computer
Portable DVD
Handheld Instruments
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产品封装图 返回TOP
电路原理图 返回TOP
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开关模式单节锂电充电IC |
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产品型号 |
输出电压 |
输入电压 |
最大充电电流 |
充电截止电压 |
精度 |
涓流电止电压 |
功耗 |
封装 |
|
4.19V |
4.5-6.5V |
2A |
4.19V |
±1% |
2.9V |
3mA |
ESOP-8 |
|
|
4.2V |
3.8-6.5V |
2.5A |
4.2V |
±1% |
2.9V |
190uA |
ESOP8 |
|
|
4.35V |
3.8-6.5V |
2.5A |
4.35V |
±1% |
2.9V |
190uA |
ESOP8 |
|
|
4.2V |
4.5-5.5V |
2.5A |
4.2V |
±1% |
2.9V |
70uA |
ESOP8 |
|
|
4.35V |
4.4-5.5V |
2.5A |
4.35V |
±1% |
2.5V |
70uA |
ESOP8 |
|
|
4.2V |
4.0-6.5V |
3.5A |
4.2V以上可调 |
±1% |
2.9V |
70uA |
ESOP-8 |
|
|
4.2V |
4.5-28V |
扩流4A |
4.2V以上可调 |
±1% |
2.9V |
1mA |
SSOP-10 |
|
|
4.2V |
4.83-28V |
扩流4A |
4.2V以上可调 |
±1% |
3.1V |
1mA |
SSOP-10 |
|
|
4.2V |
5.0-20V |
扩流3A |
4.2V |
±1% |
3.0V |
1mA |
MSOP-10 |
|
|
4.2V |
4.8V-20V |
3A |
4.2V |
±1% |
2.9V |
1.5mA |
SOP-8 |
|
|
4.2V |
4.35-6V |
2A |
4.2V |
±1% |
2.9V |
60uA |
DFN3*3-10 |
|
|
4.2V |
4.35-6V |
2A |
4.2V以上可调 |
±1% |
2.9V |
60uA |
DFN3*3-10 |
|
|
单节 |
最大20V |
扩流3A |
4.2V |
0.50% |
3.0V |
10mA |
MSOP-10 |
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