Datasheet > LTC4052-4.2

LTC4052-4.2

更新时间： 2024-11-18 05:43:59

品牌	Logo	应用领域
凌特 - Linear		电池脉冲过电流保护
页数	文件大小	规格书
12页	167K
描述
Lithium-Ion Battery Pulse Charger with Overcurrent Protection

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LTC4052-4.2 数据手册

LTC4052-4.2

Lithium-Ion Battery

Pulse Charger with

Overcurrent Protection

FEATURES

DESCRIPTIO

■

Very Low Power Dissipation: 350mW at 1A

The LTC^®4052 is a complete standalone pulse charger

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

■

Complete Standalone Pulse Charger for 1-Cell

Lithium-Ion Batteries

Anexternalsenseresistorprovidesovercurrentlimitingas

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.

■

Requires No Microcontroller, MOSFET or

Blocking Diode

■

Sense Resistor Limits Maximum Current for Safety

■

Programmable Charge Termination Timer for

Maximum Capacity Charging

±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 terminates 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 wall adapter current. Removing the input

voltage puts the LTC4052 into a sleep mode, dropping the

battery current drain to less than 1µA.

■

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

■

AC Wall Adapter Present Output

■

Low Battery Drain when Input Supply Is Removed

■

Automatic Trickle Charge for Low Battery

■

Automatic Battery Refresh

Thermal Shutdown Protection

■

^{Tiny Thermally E}U^{nhanced MSOP Package}

APPLICATIO S

■

Handheld Computers

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

CYCLE

ENDS

3.5

3.0

1.0

0.5

SENSE

0.05Ω

CONSTANT

CURRENT

PULSING

CURRENT

LTC4052

GATE

CHARGE STATUS

AC PRESENT

0.022µF

CHRG

SENSE

ACPR

C/10

BAT

GND

1-CELL 4.2V

Li-Ion

BATTERY

TIMER

2.5

0.5

1.0

1.5

2.0

3.0

TIMER

0.1µF

TIME (HOURS)

4052 TA01

4052 • TA01b

405242f

12 3 4 5 6 7...12

中文翻译

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与LTC4052-4.2相关器件

型号	品牌	获取价格	描述	数据表
LTC4052-42	Linear Systems	获取价格	Lithium-Ion Battery Pulse Charger with Overcurrent Protection
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

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