Datasheet > LTC4008

LTC4008

更新时间： 2023-12-20 18:46:22

品牌	Logo	应用领域
亚德诺 - ADI		电池
页数	文件大小	规格书
24页	231K
描述
4A、高效率的多化学组成电池充电器

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中文翻译

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数据手册

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LTC4008 数据手册

LTC4008

4A, High Efficiency,

Multi-Chemistry Battery Charger

FEATURES

DESCRIPTION

The LTC^®±008 is a constant-current/constant-voltage

charger controller. The PWM controller uses a synchro-

nous, quasi-constant frequency, constant off-time archi-

tecture that will not generate audible noise even when

using ceramic capacitors. Charging current is program-

mable with a sense resistor and programming resistor to

General Purpose Charger Controller

High Conversion Efﬁciency: Up to 96%

Output Currents Exceeding 4A

±±.ꢀ% Voltage Accuracy

AC Adapter Current Limiting Maximizes

Charge Rate*

Thermistor Input for Temperature Qualiﬁed Charging

Wide Input Voltage Range: 6V to 28V

Wide Output Voltage: 3V to 28V

0.5V Dropout Voltage; Maximum Duty Cycle: 98%

Programmable Charge Current: ±±% ꢀccuracy

Indicator Outputs for Charging, C/10 Current

Detection, ꢀC ꢀdapter Present, Input Current

Limiting and Faults

±±% typical accuracy. Charging current can be monitored

as a voltage across the programming resistor. ꢀn external

resistor divider and precision internal reference set the

final float voltage.

The LTC±008 includes a thermistor sensor input that will

suspend charging if an unsafe temperature condition is

detected and will automatically resume charging when

battery temperature returns to within safe limits; a FAULT

pin indicates this condition. ꢀ FLAG pin indicates when

charging current has decreased below 10% of the pro-

grammed current. ꢀn external sense resistor programs

Charging Current Monitor Output

ꢀvailable in a 20-Pin Narrow SSOP Package

APPLICATIONS

ꢀC adapter current limiting. The I pin indicates when the

Notebook Computers

charging current is being reduced by input current limiting

Portable Instruments

so that the charging algorithm can adapt.

Battery Backup Systems

ꢀll registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. Patents including 5723970.

TYPICAL APPLICATION

12.3V, 4A Li-Ion Charger

INPUT SWITCH

DCIN

0V TO 28V

0.1µF

140k*

LTC4008

BATMON

LOGIC

DCIN

INFET

CLP

0.1µF

4.99k

0.02Ω

100k 100k

SYSTEM

LOAD

20µF

10µH

ACP

FAULT

FLAG

ACP/SHDN

FAULT

FLAG

CLN

TGATE

BGATE

PGND

CSP

0.025Ω

32.4k

Li-Ion

BATTERY

NTC

20µF

3.01k

15k*

BAT

THERMISTOR

3.01k

GND

PROG

6.04k

0.12µF

150k

10k

CHARGING

CURRENT

MONITOR

NTC

0.47µF

Q1: Si4431BDY

Q2: FDC645N

26.7k

0.0047µF

NOTE: * 0.25% TOLERANCE

ALL OTHER RESISTORS ARE 1% TOLERANCE

4008 TA01

Rev C

Document Feedback

For more information www.analog.com

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与LTC4008相关器件

型号	品牌	获取价格	描述	数据表
LTC4008EGN	Linear	获取价格	4A, High Efficiency, Multi-Chemistry Battery Charger
LTC4008EGN#PBF	Linear	获取价格	LTC4008 - 4A, High Efficiency, Multi-Chemistry Battery Charger; Package: SSOP; Pins: 20; T
LTC4008EGN#TRPBF	Linear	获取价格	LTC4008 - 4A, High Efficiency, Multi-Chemistry Battery Charger; Package: SSOP; Pins: 20; T
LTC4008EGN-1	Linear	获取价格	4A, High Efficiency, Multi-Chemistry Battery Charger
LTC4008EGN-1#TR	Linear	获取价格	LTC4008 - 4A, High Efficiency, Multi-Chemistry Battery Charger; Package: SSOP; Pins: 20; T
LTC4008EGN-1#TRPBF	Linear	获取价格	LTC4008 - 4A, High Efficiency, Multi-Chemistry Battery Charger; Package: SSOP; Pins: 20; T
LTC4009	Linear	获取价格	High Effi ciency, Multi-Chemistry Battery Charger
LTC4009	ADI	获取价格	高效率的多化学组成电池充电器
LTC4009_15	Linear	获取价格	High Efficiency, Multi-Chemistry Battery Charger
LTC4009-1	Linear	获取价格	High Effi ciency, Multi-Chemistry Battery Charger

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