参数资料
型号: LM3420A16.8MDA
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
封装: DIE
文件页数: 1/21页
文件大小: 468K
代理商: LM3420A16.8MDA
LM3420-4.2, -8.2, -8.4, -12.6, -16.8
Lithium-Ion Battery Charge Controller
General Description
The LM3420 series of controllers are monolithic integrated
circuits designed for charging and end-of-charge control for
Lithium-Ion rechargeable batteries. The LM3420 is available
in five fixed voltage versions for one through four cell charger
applications (4.2V, 8.2V/8.4V, 12.6V and 16.8V respec-
tively).
Included in a very small package is an (internally compen-
sated) op amp, a bandgap reference, an NPN output transis-
tor, and voltage setting resistors. The amplifier’s inverting in-
put
is
externally
accessible
for
loop
frequency
compensation. The output is an open-emitter NPN transistor
capable of driving up to 15 mA of output current into external
circuitry.
A trimmed precision bandgap reference utilizes temperature
drift curvature correction for excellent voltage stability over
the operating temperature range. Available with an initial tol-
erance of 0.5% for the A grade version, and 1% for the stan-
dard version, the LM3420 allows for precision end-of-charge
control for Lithium-Ion rechargeable batteries.
The LM3420 is available in a sub-miniature 5-lead SOT23-5
surface mount package thus allowing very compact designs.
Features
n
Voltage options for charging 1, 2, 3 or 4 cells
n
Tiny SOT23-5 package
n
Precision (0.5%) end-of-charge control
n
Drive capability for external power stage
n
Low quiescent current, 85 A (typ.)
Applications
n
Lithium-Ion battery charging
n
Suitable for linear and switching regulator charger
designs
Typical Application and Functional Diagram
SIMPLE SWITCHER is a registered trademark of National Semiconductor Corporation.
DS012359-1
Typical Constant Current/Constant Voltage
Li-Ion Battery Charger
DS012359-2
LM3420 Functional Diagram
July 2000
LM3420-4.2,
-8.2,
-8.4,
-12.6,
-16.8
Lithium-Ion
Battery
Charge
Controller
2000 National Semiconductor Corporation
DS012359
www.national.com
相关PDF资料
PDF描述
LM3420M5-12.6/NOPB 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
LM3420AM5-12.6/NOPB 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
LM3420M5X-16.8/NOPB 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
LM3420AM5-4.2/NOPB 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
LM3420M5-8.4/NOPB 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
相关代理商/技术参数
参数描述
LM3420AL-4.2 DIE 制造商:Texas Instruments 功能描述:
LM3420AL-8.2 WAF 制造商:Texas Instruments 功能描述:
LM3420AM5-12.6 功能描述:IC CTRLR LIION BAT CHRG SOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子(Li-Ion)、锂聚合物(Li-Pol) 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A,SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT
LM3420AM5-12.6/NOPB 制造商:Texas Instruments 功能描述:Battery Charger Li-Ion 15mA 12.6V 5-Pin SOT-23 T/R
LM3420AM5-16.8 制造商:NSC 制造商全称:National Semiconductor 功能描述:Lithium-Ion Battery Charge Controller