The CXLB7312 is a single cell, fully integrated constant current (CC)/constant
voltage (CV) Li-ion battery charger. Its compact package with minimum external
components requirement makes the CXLB7312 ideal for portable applications.
No external sense resistor or blocking diode is necessary for the CXLB7312.
Build-in thermal feedback mechanism regulates the charge current to control
the die temperature during high power operation or at elevated ambient
temperature.
The CXLB7312 has a pre-charge function for trickle charging deeply discharged
batteries. The fast charge current can be programmed by an external resistor.
CV regulation mode is automatically enabled once the battery’s charging curve
reaches the constant voltage portion. The output current then decays and is
finally terminated once the charge current drops to 1/10th of the programmed value.
The CXLB7312 keeps monitoring the battery voltage and enables a new charge cycle
once the voltage drops by 150mV below the CV value.Power supply state is constantly
monitored and the battery drain current is reduced to minimum value automatically
when the CXLB7312 senses a lack of input power. In its shutdown mode, the CXLB7312
can reduce the supply current to less than 25μA. A status pin outputs a logic HIGH/LOW
to indicate the charging status and the presence of power supply.
Other features include charge current monitor,under-voltage lockout
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目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（产品PDF文档）
5.产品封装图 6.电路原理图 7.功能概述 8.相关产品
一,产品概述(General Description) 
The CXLB7312 is a single cell, fully integrated constant current (CC)/constant
voltage (CV) Li-ion battery charger. Its compact package with minimum external
components requirement makes the CXLB7312 ideal for portable applications.
No external sense resistor or blocking diode is necessary for the CXLB7312.
Build-in thermal feedback mechanism regulates the charge current to control
the die temperature during high power operation or at elevated ambient
temperature.
The CXLB7312 has a pre-charge function for trickle charging deeply discharged
batteries. The fast charge current can be programmed by an external resistor.
CV regulation mode is automatically enabled once the battery’s charging curve
reaches the constant voltage portion. The output current then decays and is
finally terminated once the charge current drops to 1/10th of the programmed value.
The CXLB7312 keeps monitoring the battery voltage and enables a new charge cycle
once the voltage drops by 150mV below the CV value.Power supply state is constantly
monitored and the battery drain current is reduced to minimum value automatically
when the CXLB7312 senses a lack of input power. In its shutdown mode, the CXLB7312
can reduce the supply current to less than 25μA. A status pin outputs a logic HIGH/LOW
to indicate the charging status and the presence of power supply.
Other features include charge current monitor,under-voltage lockout.
二.产品特点(Features)
·Standalone Capability with no Requirement
of External MOSFET, Sense Resistor orBlocking Diode.
·Complete Linear Charger in Compact Package
for Single Cell Lithium-Ion Batteries
·Programmable Pre-charge, Fast Charge and Termination Current.
·Constant-Current/Constant-Voltage Operation
with Thermal Regulation to Maximize Charge
Rate Without Risk of Overheating
·Charges Single Cell Li-Ion Batteries Directly from USB Port
·Preset 4.2V Charge Voltage with ±1% Accuracy
·Automatic Recharge
·Charge Status Output Pin
·C/10 Charge Termination
·25μA Supply Current in Shutdown
·2.9V Trickle Charge Threshold
·Soft-Start Limits Inrush Current
·Available in SOT-23-6 and ESOP8 Package
三,应用范围 (Applications)
Cellular Telephones, PDAs, MP3 Players
Charging Docks and Cradles
Bluetooths Applications
四.技术规格书下载（产品PDF）
需要详细的PDF规格书请扫一扫微信联系我们
五,产品封装图 (Package)
六.电路原理图
七,相关芯片选择指南
| 锂电池充电芯片(Li-ion Battery Charger ) | ||||||||
| Part No. | Features | VIN | Series Cells | Max Charger | Charger Type | Output Accu. | Package | Application |
| CXLB7310B | Temperature Regulation, Trickle Charge, C/10 Charge Termination, USB Compliant | 4.25~6.5V,Max 10V | 1 | 800mA | Linear | 4.2V±1% 4.3V±1% 4.4V±1% | SOT23-5 TSOT23-5 | 单节锂电供电设备 |
| CXLB7311B | 1A Lithium Ion Battery Linear Charger | 4~6.5V | 1 | 1A | Linear | 4.2V±1% 4.35V±1% | ESOP8 | 单节锂电供电设备 |
| CXLB7312 | 500mA/1.5A Lithium Ion Battery Linear Charger | 4.25~6V | 1 | 500mA/1.5A | Linear | 4.2V±1% 4.35V±1% | SOT23-6 ESOP8 | 单节锂电供电设备 |
| CXLB7313 | 2A Lithium Ion Battery Switching Charger | 4.2~6V | 1 | 2A | Switching | 4.2V±1% 4.35V±1% | DFN3x3-10 | 单节锂电供电设备 |
