Datasheet > LTC4058

LTC4058

更新时间： 2024-11-18 22:51:47

品牌	Logo	应用领域
凌特 - Linear		电池
页数	文件大小	规格书
12页	182K
描述
Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN

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中文翻译

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LTC4058 数据手册

LTC4058-4.2/LTC4058X-4.2

Standalone Linear

Li-Ion Battery Charger with

Thermal Regulation in DFN

FEATURES

DESCRIPTIO

■

Programmable Charge Current Up to 950mA

The LTC^®4058 is a complete constant-current/constant-

voltage linear charger for single cell lithium-ion batteries.

Its DFN package and low external component count make

the LTC4058 ideally suited for portable applications. Fur-

thermore, the LTC4058 is designed to work within USB

power specifications.

■

Complete Linear Charger in DFN Package

■

No MOSFET, Sense Resistor or Blocking Diode

Required

■

Thermal Regulation Maximizes Charge Rate

Without Risk of Overheating*

■

Battery Kelvin Sensing Improves Charging Accuracy

The LTC4058 can Kelvin sense the battery terminal for

more accurate float voltage charging. No external sense

resistor or external blocking diode are required due to the

internal MOSFET architecture. Thermal feedback regu-

latesthechargecurrenttolimitthedietemperatureduring

high power operation or high ambient temperature condi-

tions. The charge voltage is fixed at 4.2V and the charge

current is programmed with a resistor. The LTC4058

terminates the charge cycle when the charge current

drops to 10% of the programmed value after the final float

voltage is reached.

■

Charges Directly from a USB Port

C/10 Charge Termination

■

Preset 4.2V Charge Voltage with ±1% Accuracy

■

Charge Current Monitor Output for Gas Gauging*

■

Automatic Recharge

■

Charge Status Output

■

“AC Present” Output

■

2.9V Trickle Charge Threshold (LTC4058)

■

Available Without Trickle Charge (LTC4058X)

■

Soft-Start Limits Inrush Current

■

Low Profile (3mm × 3mm × 0.75mm) DFN Package

When the input supply (wall adapter or USB supply) is

removed,theLTC4058entersalowcurrentstatedropping

the battery drain current to less than 2µA. Other features

include charge current monitor, undervoltage lockout,

automatic recharge and status pins to indicate charge

termination and the presence of an input voltage.

APPLICATIO S

■

Cellular Telephones, PDAs, MP3 Players

Bluetooth Applications

■

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

*US Patent 6,522,118

TYPICAL APPLICATIO

Complete Charge Cycle (750mAh Battery)

700

600

500

400

300

200

100

4.75

4.50

4.25

4.00

3.75

3.50

3.25

3.00

CONSTANT

CURRENT

Single Cell Li-Ion Battery Charger with Kelvin Sense

CONSTANT

VOLTAGE

600mA

BAT

BSENSE

4.5V TO 6.5V

LTC4058-4.2

CHRG

ACPR

1-CELL

Li-Ion

BATTERY

PROG

GND

= 5V

1.65k

1µF

= 40°C/W

= 1.65k

PROG

405842 TA01

= 25°C

0.25 0.5 0.75 1.0 1.25

1.75 2.0 2.25

1.5

405842 TA02

TIME (HOURS)

sn405842 405842fs

12 3 4 5 6 7...12

中文翻译

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与LTC4058相关器件

型号	品牌	获取价格	描述	数据表
LTC4058-4.2	Linear	获取价格	Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN
LTC4058-4.2	ADI	获取价格	采用 DFN 封装并具热调节功能的独立线性锂离子电池充电器
LTC4058-4.2_15	Linear	获取价格	Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN
LTC4058EDD-4.2	Linear	获取价格	Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN
LTC4058EDD-4.2#PBF	Linear	获取价格	LTC4058-4.2 - Standalone Linear Li-Ion Battery Chargers with Thermal Regulation in DFN; Pa
LTC4058EDD-4.2#TR	Linear	获取价格	LTC4058-4.2 - Standalone Linear Li-Ion Battery Chargers with Thermal Regulation in DFN; Pa
LTC4058EDD-4.2#TRPBF	Linear	获取价格	暂无描述
LTC4058X-4.2	Linear	获取价格	Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN
LTC4058X-4.2_15	Linear	获取价格	Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN
LTC4058XEDD-4.2	Linear	获取价格	Standalone Linear Li-Ion Battery Charger with Thermal Regulation in DFN

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