Datasheet > ADP2291

ADP2291

更新时间： 2024-09-14 21:53:31

品牌	Logo	应用领域
亚德诺 - ADI		电池
页数	文件大小	规格书
20页	501K
描述
Compact, 1.5 A Linear Charger for Single-Cell Li+ Battery

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ADP2291 数据手册

Compact, 1.5 A Linear Charger

for Single-Cell Li+ Battery

ADP2291

FEATURES

GENERAL DESCRIPTION

Simple, safe linear charger for single cell lithium battery

4.5 V to 12 V input voltage range

Adjustable charging current up to 1.5 A

Low cost PNP external pass element

Automatic reverse isolation with no external blocking diode

Output overshoot protection

Deep discharge precharge mode

Thermal shutdown

Automatic recharge

Programmable termination timer

LED charging status indicator

4.2 V output voltage with 1% accuracy over line and

temperature

1 µA shutdown supply current

Small, 8-pin MSOP and 3 × 3 mm LFCSP packages

The ADP2291 is a constant-current/constant-voltage linear

charger for a single cell lithium ion battery, requiring just a few

components to provide a simple and safe charging system that

operates from a wide 4.5 V to 12 V input voltage range. It

features an internally controlled, multistep charging cycle that

improves battery life.

An external, low cost, PNP provides the charging current to the

battery and an external resistor sets the maximum charge

current. A small external capacitor programs the maximum

charge time. The controller includes an LED driver to indicate

the battery charging status.

Safety features include charging stop mode for battery faults,

output overshoot protection, and thermal shutdown. The

ADP2291 also features automatic reverse isolation, which does

not require an additional blocking diode.

APPLICATIONS

The multistep charge cycle optimizes the battery charging time

in a safe manner. It features a trickle charge mode for a deeply

discharged cell and a fast charging mode with a maximum

current of 1.5 A. The ADP2291 controls the end of charge with

a 4.2 V output voltage that is 1% accurate over line and temp-

erature. It automatically recharges the battery if the cell voltage

drops. When the input supply is removed, the part enters a low

current state and reduces the current drawn from the battery to

below 1 µA.

Wireless handsets

Smart handhelds and PDAs

Digital cameras

Single cell lithium ion-powered systems

Cradle chargers

The ADP2291 is available in both a small, 8-pin MSOP package

and a 3 × 3 mm LFCSP package that is ideally suited for small,

portable applications.

TYPICAL OPERATING CIRCUIT

INPUT

4.6V–12V

CIN

COUT

DRV

BAT

GND

ADP2291

CHG

TIMER

ADJ

CTIMER

SHUTDOWN

Figure 1. Basic Circuit Configuration

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.326.8703

www.analog.com

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与ADP2291相关器件

型号	品牌	获取价格	描述	数据表
ADP2291ACPZ-R7	ADI	获取价格	Compact, 1.5 A Linear Charger for Single-Cell Li+ Battery
ADP2291ARMZ-R7	ADI	获取价格	Compact, 1.5 A Linear Charger for Single-Cell Li+ Battery
ADP2300	ADI	获取价格	1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator
ADP2300AUJZ-R2	ADI	获取价格	1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator
ADP2300AUJZ-R7	ADI	获取价格	1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator
ADP2300-EVALZ	ADI	获取价格	1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator
ADP2301	ADI	获取价格	1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator
ADP2301AUJZ-R2	ADI	获取价格	1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator
ADP2301AUJZ-R7	ADI	获取价格	1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator
ADP2301-EVALZ	ADI	获取价格	1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator

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