Datasheet > CDRH3D18-220NC

CDRH3D18-220NC

更新时间： 2024-02-16 07:02:26

品牌	Logo	应用领域
Linear Systems		驱动器
页数	文件大小	规格书
16页	274K
描述
White LED Driver with Integrated Schottky in 3mm 2mm DFN

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中文翻译

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数据手册

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CDRH3D18-220NC 数据手册

LT3591

White LED Driver with

Integrated Schottky in

3mm × 2mm DFN

FEATURES

DESCRIPTION

TheLT^®3591isaﬁxedfrequencystep-upDC/DCconverter

speciﬁcallydesignedtodriveuptotenwhiteLEDsinseries

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.

■

Drives Up to Ten White LEDs from a 3V Supply

■

High Side Sense Allows “One Wire Current Source”

■

Internal Schottky Diode

■

One Pin Dimming and Shutdown

80:1 True Color PWM^TMDimming Range

■

42V Open LED Protection

■

1MHz Switching Frequency

■

5ꢀ Reference Accuracy

■

V Range: 2.5V to 12V

■

Requires Only 2.2µF Output Capacitor

■

Low Proﬁle 8-Lead DFN Package

(3mm × 2mm × 0.75mm)

The high switching frequency allows the use of tiny induc-

tors and capacitors. A single pin performs both shutdown

and accurate LED dimming control. Few external compo-

nents are needed: open-LED protection and the Schottky

diode are all contained inside a low proﬁle 3mm × 2mm

DFN package.

APPLICATIONS

■

Cellular Phones

■

PDAs, Handheld Computers

■

Digital Cameras

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

True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are

the property of their respective owners.

■

MP3 Players

■

GPS Receivers

TYPICAL APPLICATION

Li-Ion Driver for Ten White LEDs

Conversion Efﬁciency

SHUTDOWN AND

DIMMING CONTROL

= 3.6V

10 LEDs

CTRL

CAP

LED

3V TO 5V

SENSE

LT3591

GND

22µH

1µF

10Ω

2.2µF

LED CURRENT (mA)

3591 TA01b

3591 TA01a

3591f

12 3 4 5 6 7...16

中文翻译

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与CDRH3D18-220NC相关器件

型号	品牌	获取价格	描述	数据表
CDRH3D18ENP-100NB	SUMIDA	获取价格	General Purpose Inductor, 10uH, 30%, 1 Element, Ferrite-Core, SMD, 1515, ROHS COMPLIANT
CDRH3D18ENP-100NC	SUMIDA	获取价格	General Purpose Inductor, 10uH, 30%, 1 Element, Ferrite-Core, SMD, 1616, CHIP, 1616, HALOG
CDRH3D18ENP-120NC	SUMIDA	获取价格	General Purpose Inductor, 12uH, 30%, 1 Element, Ferrite-Core, SMD, 1616, CHIP, 1616, HALOG
CDRH3D18ENP-150NB	SUMIDA	获取价格	General Purpose Inductor, 15uH, 30%, 1 Element, Ferrite-Core, SMD, 1515, ROHS COMPLIANT
CDRH3D18ENP-150NC	SUMIDA	获取价格	General Purpose Inductor, 15uH, 30%, 1 Element, Ferrite-Core, SMD, 1616, CHIP, 1616, HALOG
CDRH3D18ENP-1R0NB	SUMIDA	获取价格	General Purpose Inductor, 1uH, 30%, 1 Element, Ferrite-Core, SMD, 1515, ROHS COMPLIANT
CDRH3D18ENP-1R0NC	SUMIDA	获取价格	General Purpose Inductor, 1uH, 30%, 1 Element, Ferrite-Core, SMD, 1616, CHIP, 1616, HALOGE
CDRH3D18ENP-1R5NB	SUMIDA	获取价格	General Purpose Inductor, 1.5uH, 30%, 1 Element, Ferrite-Core, SMD, 1515, ROHS COMPLIANT
CDRH3D18ENP-220NB	SUMIDA	获取价格	General Purpose Inductor, 22uH, 30%, 1 Element, Ferrite-Core, SMD, 1515, ROHS COMPLIANT
CDRH3D18ENP-2R2NB	SUMIDA	获取价格	General Purpose Inductor, 2.2uH, 30%, 1 Element, Ferrite-Core, SMD, 1515, ROHS COMPLIANT

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