LT3491ESC8#PBF

更新时间： 2024-02-06 01:26:13

品牌	Logo	应用领域
凌特 - Linear		显示驱动器驱动程序和接口接口集成电路光电二极管
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LT3491ESC8#PBF 数据手册

LT3491

White LED Driver with

Integrated Schottky in SC70

and 2mm × 2mm DFN

FEATURES

DESCRIPTIO

■

Drives Up to Six White LEDs from a 3V Supply

TheLT^®3491isafixedfrequencystep-upDC/DCconverter

specificallydesignedtodriveuptosixwhiteLEDsinseries

from a Li-Ion cell. Series connection of the LEDs provides

identical LED currents resulting in uniform brightness and

eliminating the need for ballast resistors. The device

featuresauniquehighsideLEDcurrentsensethatenables

the part to function as a “one wire current source;” one

sideoftheLEDstringcanbereturnedtogroundanywhere,

allowing a simpler one wire LED connection. Traditional

LED drivers use a grounded resistor to sense LED current,

requiring a 2-wire connection to the LED string.

■

High Side Sense Allows “One Wire Current Source”

■

Internal Schottky Diode

■

One Pin Dimming and Shutdown

■

27V Open LED Protection

■

2.3MHz Switching Frequency

■

±5% Reference Accuracy

■

V_INRange: 2.5V to 12V

■

Requires Only 1µF Output Capacitor

Wide 300:1 True Color PWM^TMDimming Range

■

8-Lead SC70 Package

Low Profile 6-Lead DFN Package

■

The 2.3MHz switching frequency allows the use of tiny

inductors and capacitors. A single pin performs both

shutdown and accurate LED dimming control. Few exter-

nal components are needed: open-LED protection and the

Schottky diode are all contained inside the tiny SC70 and

2mm × 2mm DFN packages. With such a high level of

integration, the LT3491 provides a high efficiency LED

driver solution in the smallest of spaces.

^{(2mm × 2mm ×}U^0.75mm)

APPLICATIO S

■

Cellular Phones

■

PDAs, Handheld Computers

■

Digital Cameras

■

MP3 Players

■

GPS Receivers

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

All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

Efficiency

Li-Ion Driver for Four White LEDs

SHUTDOWN AND

DIMMING CONTROL

= 3.6V

4 LEDs

CTRL

CAP

LED

3V TO 5V

SENSE

LT3491

GND

10Ω

10µH

1µF

3491 TA01a

LED CURRENT (mA)

C1: TAIYO YUDEN LMK212BJ105MD

C2: TAIYO YUDEN GMK316BJ105ML

L1: MURATA LQH32CN100

3491 TA01b

3491fa

12 3 4 5 6 7...16

中文翻译

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与LT3491ESC8#PBF相关器件

型号	品牌	获取价格	描述	数据表
LT3491ESC8#TR	Linear	获取价格	LT3491 - White LED Driver in SC70 with Integrated Schottky; Package: SC70; Pins: 8; Temper
LT3491ESC8#TRM	Linear	获取价格	LT3491 - White LED Driver in SC70 with Integrated Schottky; Package: SC70; Pins: 8; Temper
LT3491ESC8#TRMPBF	Linear	获取价格	暂无描述
LT3491ESC8#TRPBF	Linear	获取价格	LT3491 - White LED Driver in SC70 with Integrated Schottky; Package: SC70; Pins: 8; Temper
LT3492	Linear	获取价格	Triple Output LED Driver with 3000:1 PWM Dimming
LT3492	ADI	获取价格	具 3000:1 PWM 调光比的三通道输出 LED 驱动器
LT3492EFE	Linear	获取价格	Triple Output LED Driver with 3000:1 PWM Dimming
LT3492EFE#PBF	Linear	获取价格	LT3492 - Triple Output LED Driver with 3000:1 PWM Dimming; Package: TSSOP; Pins: 28; Tempe
LT3492EFE#TRPBF	Linear	获取价格	LT3492 - Triple Output LED Driver with 3000:1 PWM Dimming; Package: TSSOP; Pins: 28; Tempe
LT3492EFEPBF	Linear	获取价格	Triple Output LED Driver with 3000:1 PWM Dimming

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