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LM3622A-4.2MWC PDF预览

LM3622A-4.2MWC

更新时间： 2024-11-04 20:05:47
品牌 Logo 应用领域
美国国家半导体 - NSC /
页数 文件大小 规格书
9页 170K
描述
IC BATTERY CHARGE CONTROLLER, UUC, WAFER, Switching Regulator or Controller

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中文翻译

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LM3622A-4.2MWC 技术参数

生命周期：Transferred包装说明：DIE, WAFER
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.58
模拟集成电路 - 其他类型：BATTERY CHARGE CONTROLLER最大输入电压：24 V
最小输入电压：4.5 V标称输入电压：5 V
JESD-30 代码：X-XUUC-N功能数量：1
最高工作温度：70 °C最低工作温度：-20 °C
封装主体材料：UNSPECIFIED封装代码：DIE
封装等效代码：WAFER封装形状：UNSPECIFIED
封装形式：UNCASED CHIP电源：4.5/24 V
认证状态：Not Qualified子类别：Power Management Circuits
表面贴装：YES切换器配置：SINGLE
技术：BIPOLAR温度等级：COMMERCIAL
端子形式：NO LEAD端子位置：UPPER
Base Number Matches：1

LM3622A-4.2MWC 数据手册

 浏览型号LM3622A-4.2MWC的Datasheet PDF文件第2页浏览型号LM3622A-4.2MWC的Datasheet PDF文件第3页浏览型号LM3622A-4.2MWC的Datasheet PDF文件第4页浏览型号LM3622A-4.2MWC的Datasheet PDF文件第5页浏览型号LM3622A-4.2MWC的Datasheet PDF文件第6页浏览型号LM3622A-4.2MWC的Datasheet PDF文件第7页 
February 2000  
LM3622  
Lithium-Ion Battery Charger Controller  
low-voltage battery threshold circuitry that removes this drive  
when the cell voltage drops below a preset limit. The LVSEL  
pin programs this threshold voltage to either 2.7V/cell or  
2.15V/cell. The low-voltage detection, which is a user en-  
abled feature, provides an output signal that can be used to  
enable a ″wake up charge″ source automatically to precon-  
dition a deeply discharged pack.  
General Description  
The LM3622 is a charge controller for Lithium-Ion batteries.  
This monolithic integrated circuit accurately controls an ex-  
ternal pass transistor for precision Lithium-Ion battery charg-  
ing. The LM3622 provides a constant voltage or constant  
current (CVCC) configuration that changes, as necessary, to  
optimally charge lithium-ion battery cells. Voltage charging  
versions (4.1V, 4.2V, 8.2V, and 8.4V) are available for one or  
two cell battery packs and for coke or graphite anode battery  
chemistry.  
The LM3622 is available in a standard 8-lead SOIC surface  
mount package.  
Features  
n Versions for charging of 1 cell (4.1V or 4.2V) or 2 cells  
(8.2V or 8.4V)  
The LM3622 accepts input voltages from 4.5V to 24V. Con-  
troller accuracy over temperature is 30mV/cell for A grade  
±
±
and 50mV/cell for the standard grade. No precision exter-  
n Versions for coke or graphite anode  
nal resistors are required. Furthermore, the LM3622’s propri-  
etary output voltage sensing circuit drains less than 200nA  
from the battery when the input source is disconnected.  
±
n Precision ( 30mV/cell) end-of-charge control  
n Wide input range: 4.5V-24V  
The LM3622 circuitry includes functions for regulating the  
charge voltage with a temperature compensated bandgap  
reference and regulating the current with an external sense  
resistor. The internal bandgap insures excellent controller  
performance over the operating temperature and input sup-  
ply range.  
n Low battery drain leakage: 200nA  
n 15 mA available to drive low cost PNP  
Applications  
n Cellular phone cradle charger  
n PDA/Notebook cradle charger  
n Camcorder cradle charger  
The LM3622 can sink 15mA minimum at the EXT pin to drive  
the base of an external PNP pass transistor. It also has  
Typical Application  
DS100974-1  
© 2000 National Semiconductor Corporation  
DS100974  
www.national.com  
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