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参数资料
| 型号： | LM3622-4.2MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | BATTERY CHARGE CONTROLLER, UUC |
| 封装： | DIE |
| 文件页数： | 1/13页 |
| 文件大小： | 253K |
| 代理商： | LM3622-4.2MDC |
LM3622
Lithium-Ion Battery Charger Controller
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 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-
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.
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.
The LM3622 can sink 15mA minimum at the EXT pin to drive
the base of an external PNP pass transistor. It also has
low-voltage battery threshold circuitry that removes this drive
when the cell voltage drops below a preset limit. The LV
SEL
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.
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)
n
Versions for coke or graphite anode
n
Precision (±30mV/cell) end-of-charge control
n
Wide input range: 4.5V-24V
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
Typical Application
DS100974-1
February 2000
LM3622
Lithium-Ion
Battery
Charger
Controller
2000 National Semiconductor Corporation
DS100974
www.national.com
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| LM3661TLX-1.40 | 0.65 A SWITCHING REGULATOR, 675 kHz SWITCHING FREQ-MAX, PBGA10 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3622AM-4.1 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Lithium-Ion Battery Charger Controller |
| LM3622AM-4.1/NOPB | 功能描述:IC CTRLR LI-ION BAT CHRG 8-SOIC RoHS:是 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 |
| LM3622AM-4.2 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Lithium-Ion Battery Charger Controller |
| LM3622AM-4.2/NOPB | 功能描述:IC CTRLR LI-ION BAT CHRG 8-SOIC RoHS:是 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 |
| LM3622AM-8.1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Battery Management |
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