可编程充电电流1毫安至200毫安线性单锂离子电池充电器CXLB7246MR自动充电C/10电荷终止2.9V涓流充电阈值软起动限制浪涌电流

CXLB7246MR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。它的SOT封装和低外部组件数量使得CXLB7246MR非常适合便携式应用，而且，CXLB7246MR是专门设计用于USB电源规格的。由于内部MOSFET结构，不需要外部感测电阻，也不需要阻塞二极管。热反馈调节充电电流，以在高功率运行或高环境温度下限制模具温度。充电电压固定在4.2V，充电电流可通过一个电阻器进行外部编程。当达到最终浮充电压后，充电电流降至编程值的1/10时，CXLB7246MR自动终止充电循环。当卸下输入电源（墙壁适配器或USB电源）时，CXLB7246MR将自动进入低电流状态，电池放电电流降至小于2uA。这个
CXLB7246MR可进入关机模式，将电源电流降至50uA。其他功能包括电池温度监视器、欠压锁定、自动充电和两个状态引脚，指示充电和充电终止

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（PDF文档）

• 5.产品封装       6.电路原理图  

• 7.相关产品

   产品概述 返回TOP

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The CXLB7246MR is a complete constant current & constant voltage linear charger for single cell lithium-ion batteries. Its SOT package and low external component count make the CXLB7246MR ideally suited for portable applications.Furthermore, the CXLB7246MR 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 MOSFET 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 CXLB7246MR 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 CXLB7246MR automatically

enters a low current state, dropping the battery drain current to less than 2uA. The

CXLB7246MR can be put into shutdown mode, reducing the supply current to 50uA.

Other features include Battery temperature monitor, under-voltage lockout, automatic

recharge and two status pins to indicate charge and charge termination

   产品特点 返回TOP

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   Programmable Charge Current Up to 200mA

No MOSFET, Sense Resistor or Blocking Diode Required

Complete Linear Charger in SOT Package for 

single Cell Lithium-Ion Batteries

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

Charge Current Monitor Output for Gas Gauging

Automatic Recharge

Charge state pairs of output, no battery and fault

status display

C/10 Charge Termination

50uA Supply Current in Shutdown

2.9V Trickle Charge Threshold

Soft-Start Limits Inrush Current

Battery temperature monitoring function ESD HBM 8KV

 Available in SOT23-5 Package 

   应用范围 返回TOP

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   Wearable device

Small capacity battery charger 

application Bluetooth、GPS Applications 

   技术规格书（产品PDF) 返回TOP 

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产品封装图 返回TOP

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电路原理图 返回TOP

 

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线性单节锂电充电IC
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	涓流充电截止电压	功耗	封装形式
CXLB7244	4.2V	4.5-12V	200mA	4.2V	±1%	2.9V	55uA	SOT23-6
CXLB7245DR	4.2V	4.5-6.0V	300mA	4.2V	±1%	2.9V	350uA	DFN2*3-8
CXLB7246DR	4.2V	4.25-6.5V	200mA	4.2V	±1%	2.9V	350uA	DFN2*3-8
CXLB7246MR	4.2V	4.25-6.5V	200mA	4.2V	±1%	2.9V	150uA	SOT-25
CXLB7247	4.2V	4.25-6.5V	1.2A	4.2V	±1%	2.9V	25uA	ESOP8
CXLB7247ADR	4.2V	4.5-12V	1A	4.2V	±1%	2.9V	55uA	DFN3*3-8
CXLB7247B	3.6V/4.2V	4.25-6.5V	1.2A	3.6V-4.2V	±1%	2.9V	25uA	ESOP8
CXLB7247DR	4.2V	4.5V-8V	1A	4.2V	±1%	2.9V	55uA	DFN3*3-8
CXLB7248	4.2V	4.25-6.5V	800mA	4.2V	±1%	2.9V	25uA	SOT23-5
CXLB7248B	4.2V	4.25-6.5V	800mA	4.2V	±1%	2.9V	25uA	SOT23-5
CXLB7248C	4.2V	4.25-6.5V	500mA	4.2V	±1%	2.9V	25uA	SOT23-5
CXLB7248D	4.35V	4.25-6V	800mA	4.35V	±1%	2.9V	25uA	SOT23-5
CXLB7249	4.2V	4.25-6.5V	800mA	4.2V	±1%	2.9V	85uA	SOT23-5
CXLB7249B	3.7V	4-7V	500mA	3.7V	±1%	2.5V	250uA	SOT23-5
CXLB7249C	2.8V	4-7V	500mA	2.8V	±1%	2.0V	250uA	SOT23-5
CXLB7249D	4.35V	4.25-6.5V	800mA	4.35V	±1%	2.9V	85uA	SOT23-5
CXLB7250	4.2V	4.0-8.0V	1200mA	4.2V	±1%	2.9V	55uA	ESOP8
CXLB7250A	4.2V	4.0-8.0V	1200mA	4.2V	±1%	2.9V	55uA	ESOP8
CXLB7250B	4.35V	4.0-8.0V	1200mA	4.35V	±1%	2.9V	55uA	ESOP8
CXLB7250C	4.2V	4.25-7.0V	1000mA	4.2V	±1%	2.9V	55uA	ESOP8
CXLB7250DR	4.2V	4.25-7.0V	1000mA	4.2V	±1%	2.9V	50uA	DFN2X2-6L
CXLB7251	4.2V	4.25-6.0V	750mA	4.2V	±1%	2.9V	25uA	SOT23-6
CXLB7251A	4.2V	4.25-6.0V	800mA	4.2V	±1%	2.9V	25uA	SOT23-6
CXLB7251B	4.35V	4.5-6.5V	700mA	4.35V	±1%	2.9V	80uA	SOT-26
CXLB7251C	4.2V	4.25-6.5V	500mA	4.2V	±1%	2.9V	25uA	SOT-26
CXLB7251D	4.2V	4.5-18V	800mA	4.2V	±1%	2.9V	70uA	SOT-26
CXLB7252	4.2V	3.8-6.5V	1A/0.5A	4.2V	±1%	2.9V	450uA	ESOP8/SOP8
CXLB7253	4.2V	4.5-7V	扩流3A	4.2V	±1%	2.9V	1mA	SOP-8
CXLB7366	4.2V	4.5-12V	700mA	4.2V	±1%	2.9V	55uA	SOT23-5
CXLB7367	4.2V	4.5-12V	700mA	4.2V	±1%	2.9V	55uA	SOT23-6
CXLB7254	4.2V	4.25-6.5V	1000mA	4.2V	±1%	2.9V	50uA	ESOP8
CXLB7368	4.2V	4.5-12V	1000mA	4.2V	±1%	2.9V	55uA	ESOP8
CXLB7255	4.2V	4.5-5.5V	800mA	4.2V	±1%	2.9V	48uA	DFN3*3-10
CXLB7256	4.2V	4.5V-18V	1.3A	4.2V	±1%	2.9V	48uA	SOP8
CXLB7256A	4.2V	4.5-18V	1.6A	4.2V	±1%	2.9V	7uA	SOP-8