CXLB73123是一款完整的单电池恒流恒压线性充电器锂离子和锂聚合物电池。它的SOT-23封装和低外部组件计数使CXLB73123非常适合便携式应用程序。此外，CXLB73123是
专为工作在USB电源规格。同时，CXLB73123还可以用于独立锂离子和锂聚合物电池充电器。不需要外部感应电阻，也不需要由于内部MOSFET结构。热反馈调节充电电流以限制模具高功率运行或高环境温度时的温度。充电电压是固定的在4.2V时，充电电流可以用一个电阻器进行外部编程。CXLB73123当充电电流降至编程值的1/10时，自动终止充电循环
达到最终浮充电压后的值。当卸下输入电源（墙壁适配器或USB电源）时，CXLB73123将自动进入低电流阶段，电池放电电流降至小于2uA。CXLB73123可以进入关机模式，将电源电流降至20uA。其他功能包括充电电流监视器、欠压锁定、自动充电和指示充电终止和输入电压存在的状态引脚。CXLB73123是故意设计的有点消极的温度。这为锂提供了额外的保护
充电时使用电池。
[ CXLB73123 ]
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产品概述 返回TOP
CXLB73123is a complete constant-current & constant voltage linear charger for single cell
lithium-ion and Lithium-Polymer batteries. Its SOT-23 package and low external component count
make CXLB73123 ideally suited for portable applications. Furthermore, the CXLB73123 is
specifically designed to work within USB power specification. At the same time, CXLB73123 can also
be used in the standalone lithium-ion and Lithium-polymer battery chargers.
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 CXLB73123
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 CXLB73123 automatically
enters a low current stage, dropping the battery drain current to less than 2uA. The CXLB73123 can
be put into shutdown mode, reducing the supply current to 20uA.
Other features include charge current monitor, undervoltage lockout, automatic recharge and a
status pin to indicate charge termination and the presence of an input voltage. CXLB73123 is
intentionally designed to have slightly negative Tempco. This provides extra protection to Lithium
battery during charging.
产品特点 返回TOP
Programmable Charge Current Up to 800mA.
No MOSFET, Sense Resistor or Blocking Diode
Required.
Constant-Current/Constant-Voltage Operation
with Thermal Protection 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.
20uA Supply Current in Shutdown.
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current.
Available in 6-Lead SOT-23 and PSOP-8
(Exposed Pad) Packages.
RoHS Compliant and 100% Lead (Pb)-Free
应用范围 返回TOP
Cellular Telephones, PDA’s, MP3 Players.
Charging Docks and Cradles
Bluetooth Applications
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产品封装图 返回TOP
电路原理图 返回TOP
|
Battery Charger（锂电池充电） |
|||||||
|
Product |
status |
VccMax |
Vbat |
IOUT Max |
Polarity Detect |
OTP、OCP |
Pkg |
|
Active |
8V |
4.35 |
1A |
NO |
Yes |
SOT23-5 PSOP8 |
|
|
Active |
8V |
4.22 |
1A |
NO |
Yes |
SOP8 PSOP8（电子烟） |
|
|
Active |
8V |
4.22 |
800mA |
NO(单灯) |
Yes |
SOT23-5 |
|
|
Active |
8V |
4.22 |
800mA |
NO(双灯） |
Yes |
SOT23-6 PSOP8 |
|
|
Active |
8V |
4.22 |
1A |
NO |
Yes |
PSOP8/DFN2*2-6 |
|
|
Active |
8V |
4.22/4.35 |
2.5A |
YES(单灯） |
Yes |
PSOP8 |
|
|
Active |
8V |
4.22/4.35 |
2.5A |
YES(双灯） |
Yes |
PSOP8 |
|
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下一篇▶:可编程充电电流1000毫安CXLB73124单电池锂离子电池的完整恒流恒压线性充电器热反馈调节充电电流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
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