Datasheet > LTC4052-42

LTC4052-42

更新时间： 2024-11-18 04:19:31

品牌	Logo	应用领域
Linear Systems		电池脉冲过电流保护
页数	文件大小	规格书
8页	162K
描述
Lithium-Ion Battery Pulse Charger with Overcurrent Protection

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中文翻译

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LTC4052-42 数据手册

Final Electrical Specifications

LTC4052-4.2

Lithium-Ion Battery

Pulse Charger with

Overcurrent Protection

July 2002

FEATURES

DESCRIPTIO

■

Complete Standalone Pulse Charger for 1-Cell

The LTC^®4052 is a complete standalone pulse charger

with integrated MOSFET for 1-cell lithium-ion batteries.

Lithium-Ion Batteries

■

Requires No Microcontroller

Internal 0.35Ω NMOS Switch

An external sense resistor provides maximum charge

current limiting as a safety precaution against a user

connecting a wall adapter with the incorrect or no current

limit. The internal MOSFET prevents reverse battery

current from flowing if the input voltage is shorted to

ground, eliminating the need for a blocking diode.

■

Sense Resistor Limits Maximum Current for Safety

■

Programmable Charge Termination Timer for

Maximum Capacity Charging

■

No Blocking Diode Required

■

1% Float Voltage Accuracy

As the battery accepts charge and approaches the

programmed float voltage, the internal MOSFET begins

switchingoffandonwiththedutycyclegraduallydecreas-

ing as the battery approaches a fully charged condition.

A programmable timer ends the charge cycle. The near

end-of-charge C/10 condition is indicated at the CHRG pin

when the average charge current falls to one-tenth of the

wallpack current. Removing the input voltage puts the

LTC4052 into a sleep mode, dropping the battery current

drain to less than 1µA (maximum).

■

Near End-of-Charge (C/10) Detection Output

■

Low Battery Drain when Input Supply Is Removed

■

Automatic Trickle Charge for Low Battery

Automatic Battery Refresh

Thermal Shutdown Protection

■

Small 8-Pin Thermally Enhanced MSOP Package

APPLICATIO S

■

Standalone Lithium-Ion Battery Charger

■

Personal Information Appliances

The LTC4052 is available in a tiny 8-pin thermally

enhanced MSOP package.

■

Cellular Telephones

Cradle Chargers

■

, LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

Single Cell 4.2V, 1A, Standalone Li-Ion Battery Charger

LTC4052 Charge Profile

= 4.5V TO 10V

WITH 1A

4.5

CURRENT LIMIT

4.0

4.7Ω

1µF

10k

0.047µF

CHARGE

3.5

3.0

1.0

0.5

CYCLE

ENDS

SENSE

0.05Ω

CONSTANT

CURRENT

PULSING

CURRENT

LTC4052

GATE

CHARGE STATUS

AC PRESENT

0.022µF

CHRG

SENSE

ACPR

C/10

BAT

1-CELL 4.2V

Li-Ion

BATTERY

TIMER

GND

2.5

0.5

1.0

1.5

2.0

3.0

TIMER

0.1µF

TIME (HOURS)

4052 TA01

4052 • TA01b

405242i

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.

12 3 4 5 6 7 8

中文翻译

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与LTC4052-42相关器件

型号	品牌	获取价格	描述	数据表
LTC4052EMS8E-4.2	Linear Systems	获取价格	Lithium-Ion Battery Pulse Charger with Overcurrent Protection
LTC4052EMS8E-4.2	Linear	获取价格	Lithium-Ion Battery Pulse Charger with Overcurrent Protection
LTC4052EMS8E-4.2#PBF	Linear	获取价格	暂无描述
LTC4052EMS8E-4.2#TR	Linear	获取价格	LTC4052-4.2 - Lithium-Ion Battery Pulse Charger with Overcurrent Protection; Package: MSOP
LTC4052EMS8E-4.2#TRPBF	Linear	获取价格	LTC4052-4.2 - Lithium-Ion Battery Pulse Charger with Overcurrent Protection; Package: MSOP
LTC4053	Linear	获取价格	Standalone Linear Li-lon Battery Charger with Thermistor Input
LTC4053-4.2	Linear	获取价格	USB Compatible Lithium-Ion Battery Charger with Thermal Regulation
LTC4053-4.2	ADI	获取价格	具有热调节功能的 USB 兼容型锂离子电池充电器
LTC4053EDD-4.2	Linear	获取价格	USB Compatible Lithium-Ion Battery Charger with Thermal Regulation
LTC4053EDD-4.2#PBF	Linear	获取价格	暂无描述

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