LT3477EUF

更新时间： 2024-11-07 05:43:31

品牌	Logo	应用领域
凌特 - Linear		转换器
页数	文件大小	规格书
20页	265K
描述
3A, DC/DC Converter with Dual Rail-to-Rail Current Sense

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LT3477EUF 数据手册

LT3477

3A, DC/DC Converter

with Dual Rail-to-Rail

Current Sense

FEATURES

DESCRIPTIO

The LT^®3477 is a current mode, 3A DC/DC step-up con-

verter with dual rail-to-rail current sense amplifiers and an

internal 3A, 42V switch. It combines a traditional voltage

feedback loop and two unique current feedback loops to

operate as a constant-current, constant-voltage source.

■

Dual 100mV Rail-to-Rail Current Sense Amplifiers

■

Wide Input Voltage Range: 2.5V to 25V

■

3A, 42V Internal Switch

■

High Efficiency Power Conversion: Up to 93%

■

Drives LEDs in Boost, Buck-Boost or Buck Mode

■

Frequency Set by External Resistor: 200kHz to 3.5MHz Both current sense voltages are set at 100mV and can be

■

Programmable Soft-Start

adjusted independently using the I_ADJ1and I_ADJ2pins.

Efficiency of up to 91% can be achieved in typical applica-

tions.TheLT3477featuresaprogrammablesoft-startfunc-

tion to limit inductor current during start-up. Both inputs

oftheerroramplifierareavailableexternallyallowingposi-

tiveandnegativeoutputvoltages(Boost,Inverting,SEPIC,

Flyback). The switching frequency is programmable from

200kHz to 3.5MHz through an external resistor.

Low V_CESATSwitch: 0.3V at 2.5A

Capable of Positive and Negative Output Voltages

(Boost, Inverting, SEPIC, Flyback)

Available in Thermally Enhanced 20-Lead

■

^{(4mm × 4mm) Q}U^{FN and 20-Lead TSSOP Packages}

APPLICATIO S

■

Available in thermally enhanced 20-pin (4mm × 4mm)

QFN and 20-pin TSSOP packages, the LT3477 provides a

complete solution for both constant-voltage and con-

stant-current applications.

High Power LED Driver

■

DSL Modems

■

Distributed Power

■

Input/Output Current Limited Boost, SEPIC,

Inverting, Flyback Converters

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

All other trademarks are the property of their respective owners.

■

Constant-Voltage, Constant-Current Source

TYPICAL APPLICATIO

330mA LED Driver with Open LED Protection

Efficiency

10µH

3.3µF

200k

10k

SP1

SN1

FBN

ADJ1

ADJ2

LT3477

SHDN

SP2

0.3Ω

SN2

REF

FBP

GND

330mA

22k

0.2

(A)

0.1

0.3

0.4

33nF

4.7nF

OUT

3477 TA01b

3477 TA01a

3477fb

12 3 4 5 6 7...20

中文翻译

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与LT3477EUF相关器件

型号	品牌	获取价格	描述	数据表
LT3477EUF#PBF	Linear	获取价格	暂无描述
LT3477EUF#TRPBF	Linear	获取价格	LT3477 - 3A, DC/DC Converter with Dual Rail-to-Rail Current Sense; Package: QFN; Pins: 20;
LT3477IFE	Linear	获取价格	3A, DC/DC Converter with Dual Rail-to-Rail Current Sense
LT3477IFE#TR	Linear	获取价格	暂无描述
LT3477IFE#TRPBF	Linear	获取价格	暂无描述
LT3477IUF	Linear	获取价格	3A, DC/DC Converter with Dual Rail-to-Rail Current Sense
LT3477IUF#PBF	Linear	获取价格	LT3477 - 3A, DC/DC Converter with Dual Rail-to-Rail Current Sense; Package: QFN; Pins: 20;
LT3477IUF#TR	Linear	获取价格	LT3477 - 3A, DC/DC Converter with Dual Rail-to-Rail Current Sense; Package: QFN; Pins: 20;
LT3478	Linear	获取价格	4.5A Monolithic LED Drivers with True Color PWM Dimming
LT3478	ADI	获取价格	具 True Color PWM 调光功能的 4.5A、单片式 LED 驱动器

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