Datasheet > LT3477

LT3477

更新时间： 2024-09-29 14:58:23

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
22页	571K
描述
具有双通道轨至轨电流检测功能的 3A、DC/DC 转换器

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中文翻译

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数据手册

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LT3477 数据手册

LT3477

3A, DC/DC Converter

with Dual Rail-to-Rail

Current Sense

FeaTures

DescripTion

TheLT^®3477isacurrentmode,3ADC/DCstep-upconverter

withdualrail-to-railcurrentsenseamplifiersandaninternal

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. Both cur-

rent sense voltages are set at 100mV and can be adjusted

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

Programmable Soft-Start

independently using the I

and I

pins. Efficiency

ADJ1

ADJ2

Low V

Switch: 0.3V at 2.5A

of up to 93% can be achieved in typical applications. The

LT3477 features a programmable soft-start function to

limit inductor current during start-up. Both inputs of the

error amplifier are available externally allowing positive

and negative output voltages (boost, inverting, SEPIC,

Flyback). The switching frequency is programmable from

200kHz to 3.5MHz through an external resistor.

CESAT

Capable of Positive and Negative Output Voltages

(Boost, Inverting, SEPIC, Flyback)

Available in Thermally Enhanced 20-Lead

(4mm × 4mm) QFN and 20-Lead TSSOP Packages

applicaTions

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

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

completesolutionforbothconstant-voltageandconstant-

current applications.

High Power LED Driver

DSL Modems

Distributed Power

Input/Output Current Limited Boost, SEPIC,

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

All other trademarks are the property of their respective owners.

Inverting, Flyback Converters

Constant-Voltage, Constant-Current Source

Typical applicaTion

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

0.2

(A)

0.1

0.3

0.4

22k

33nF

OUT

4.7nF

3477 TA01b

3477 TA01a

3477fd

For more information www.linear.com/LT3477

12 3 4 5 6 7...22

中文翻译

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与LT3477相关器件

型号	品牌	获取价格	描述	数据表
LT3477EFE	Linear	获取价格	3A, DC/DC Converter with Dual Rail-to-Rail Current Sense
LT3477EFE#TRPBF	Linear	获取价格	LT3477 - 3A, DC/DC Converter with Dual Rail-to-Rail Current Sense; Package: TSSOP; Pins: 2
LT3477EUF	Linear	获取价格	3A, DC/DC Converter with Dual Rail-to-Rail Current Sense
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;

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