Datasheet > LM3621M

LM3621M

更新时间： 2024-11-03 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		电池光电二极管控制器
页数	文件大小	规格书
14页	337K
描述
Single Cell Lithium-Ion Battery Charger Controller

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LM3621M 数据手册

March 1998

LM3621

Single Cell Lithium-Ion Battery Charger Controller

n Less than 1 µA current drain from fully charged battery

n Preconditioning severely discharged cells (0V to 2.55V)

General Description

The LM3621 is a full function constant voltage, constant cur-

rent (CVCC) lithium-ion (Li+) battery charger controller. It

provides 1% regulation accuracy over the specified tempera-

ture range without requiring the use of external precision re-

sistors. The IC controls five charge modes: conditioning,

fast, top-off, monitor and maintenance. In addition, the

LM3621 detects and flags defective batteries as well as over

current and over voltage fault events. The architecture of the

IC is based on high gain constant voltage and constant cur-

rent control loops.

Features

n Automatic end-of-charge control

n Preset or user adjustable charge current regulation

n LED drivers for charging status and fault indication

n Battery self-discharge refresh (maintenance)

n Overvoltage/overcurrent fault detection and protection

n Defective battery pack detection

n Charge current boost control for cellular phone

applications

n Charge interruption control input

The LM3621 is designed to control a switching charger, a lin-

ear charger or an off-line ac adapter charger.

The LM3621 consists of a logic controller, precision bandgap

reference, wide bandwidth transconductance error amplifi-

ers, comparators, and an output buffer. The LM3621 is avail-

able in a 16-pin SOIC package and is specified over the

range of 0˚C to 70˚C.

Applications

n Complete, full function, protected battery charger for

coke or graphite anode, single cell Lithium-Ion battery

packs

n Linear voltage regulator controlled chargers

n High efficiency switching regulator controlled chargers

n Cost effective wall adapter chargers

Key Specifications

n Tight output voltage accuracy ( 0.5% at T_A25˚C)

n Two selectable output voltages (4.2V or 4.1V)

Typical Application

DS100107-7

1A, 4.1V CVCC Linear Charger for Graphite Anode Lithium-Ion Battery

DS100107

www.national.com

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与LM3621M相关器件

型号	品牌	获取价格	描述	数据表
LM3621M-3.0	NSC	获取价格	Single Cell Lithium-Ion Battery Charger Controller
LM3621M-3.0X	TI	获取价格	BATTERY CHARGE CONTROLLER, PDSO16, SOIC-16
LM3621MX	TI	获取价格	BATTERY CHARGE CONTROLLER, PDSO16, SOIC-16
LM3621MX/NOPB	TI	获取价格	IC,BATTERY MANAGEMENT,SOP,16PIN,PLASTIC
LM3622	NSC	获取价格	Lithium-Ion Battery Charger Controller
LM3622-4.1MDC	NSC	获取价格	IC BATTERY CHARGE CONTROLLER, UUC, DIE, Switching Regulator or Controller
LM3622A-4.1MDC	NSC	获取价格	IC BATTERY CHARGE CONTROLLER, UUC, DIE, Switching Regulator or Controller
LM3622A-4.2MDC	NSC	获取价格	IC BATTERY CHARGE CONTROLLER, UUC, DIE, Switching Regulator or Controller
LM3622A-4.2MWC	NSC	获取价格	IC BATTERY CHARGE CONTROLLER, UUC, WAFER, Switching Regulator or Controller
LM3622A-8.4MDC	NSC	获取价格	IC BATTERY CHARGE CONTROLLER, UUC, DIE, Switching Regulator or Controller

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