Datasheet > 电源电路 > 开关式稳压器或控制器> LT3743IUFDPBF

LT3743IUFDPBF

更新时间： 2024-09-16 05:43:35

品牌	Logo	应用领域
凌特 - Linear		驱动器
页数	文件大小	规格书
28页	348K
描述
High Current Synchronous Step-Down LED Driver with Three-State Control

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中文翻译

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数据手册

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LT3743IUFDPBF 数据手册

LT3743

High Current Synchronous

Step-Down LED Driver with

Three-State Control

FEATURES

DESCRIPTION

The LT^®3743 is a ﬁxed frequency synchronous step-down

DC/DCcontrollerdesignedtodrivehighcurrentLEDs. The

average current mode controller will maintain inductor

current regulation over a wide output voltage range of 0V

PWM Dimming Provides Up to 3000:1 Dimming Ratio

CTRL_SEL Dimming Provides Up to 3000:1 Dimming

Ratio Between Any Current

Three-State Current Control for Color Mixing

6% Current Regulation Accuracy

to (V – 2V). LED dimming is achieved through analog

6V to 36V Input Voltage Range

dimming on the CTRL_L, CTRL_H and CTRL_T pins and

with PWM dimming on the PWM and CTRL_SEL pins.

Through the use of externally switched load capacitors,

the LT3743 is capable of changing regulated LED current

levels within several μs, providing accurate, high speed

PWM dimming between two current levels. The switching

frequencyisprogrammablefrom200kHzto1MHzthrough

an external resistor on the RT pin.

Average Current Mode Control

2μs Maximum Recovery Time Between Any Current

Regulation State

<1μA Shutdown Current

Output Voltage Regulation and Open-LED Protection

Thermally Enhanced 4mm × 5mm QFN and

28-Pin FE Package

Additional features include voltage regulation and

overvoltage protection set with a voltage divider from the

output to the FB pin. Overcurrent protection is provided

and set by the CTRL_H pin.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Protected by U.S. Patents including 7199560, 7321203 and others pending.

APPLICATIONS

DLP Projectors

High Power Architectural Lighting

Laser Diodes

TYPICAL APPLICATION

92% Efﬁcient 20A LED Driver

10V TO 36V

EN/UVLO

PWM

CTRL_SEL

EN/UVLO

PWM

CTRL_SEL

4.7μF

1μF

SYNC

CTRL_SEL

220nF

82.5k

40k

5V/DIV

OUT

20A MAXIMUM

CBOOT

1.1μH

2.5mΩ

PWM

5V/DIV

REF

LT3743

2nF

HOT

20μF

CTRL_L

CC_INT

20V/DIV

1mF

20μF

CTRL_H

CTRL_T

40k

1mF

45.3k

GND

SENSE

LED

10A/DIV

–

NTC

680k

PWMGH

PWMGL

10nF

3743 TA01b

= 24V

20μs/DIV

51k

0A TO 2A TO 20A LED CURRENT STEP

VCL

VCH

1mF

10.0k

3743 TA01a

34k

9nF

34k

9nF

3743f

12 3 4 5 6 7...28

中文翻译

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与LT3743IUFDPBF相关器件

型号	品牌	获取价格	描述	数据表
LT3743IUFDTRPBF	Linear	获取价格	High Current Synchronous Step-Down LED Driver with Three-State Control
LT3744	ADI	获取价格	大电流、同步降压型 LED 驱动器
LT3745	Linear	获取价格	16-Channel 50mA LED
LT3745	ADI	获取价格	具降压型控制器的 16 通道、50mA LED 驱动器
LT3745-1	Linear	获取价格	16-Channel 50mA LED
LT3745-1	ADI	获取价格	具降压型控制器的 16 通道、50mA LED 驱动器
LT3746	Linear	获取价格	32-Channel 20mA LED Driver with Buck Controll
LT3746	ADI	获取价格	具降压型控制器的 32 通道、20mA LED 驱动器
LT3746EUHH#PBF	Linear	获取价格	暂无描述
LT3746EUHH#TRPBF	Linear	获取价格	LT3746 - 32-Channel 20mA LED Driver with Buck Controller; Package: QFN; Pins: 56; Temperat

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