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LT3479EDE-PBF

更新时间： 2024-09-26 05:43:31

品牌	Logo	应用领域
凌特 - Linear		转换器软启动
页数	文件大小	规格书
20页	239K
描述
3A, Full Featured DC/DC Converter with Soft-Start and Inrush Current Protection

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中文翻译

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数据手册

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LT3479EDE-PBF 数据手册

LT3479

3A, Full Featured DC/DC

Converter with Soft-Start

and Inrush Current Protection

FEATURES

DESCRIPTION

The LT^®3479 is a current mode, ﬁxed frequency step-up

DC/DC converter with an internal 3A, 42V switch. Efﬁcien-

ciesofupto89%canbeachievedintypicalapplications. It

featuresaprogrammablesoft-startfunctiontolimitinduc-

tor current during start-up and inrush current protection

to protect the LT3479 during shorts and line transients.

Both inputs of the error ampliﬁer are available to the user

allowing positive and negative output voltages. Through

an external resistor, the user can program the switch-

ing frequency from 200kHz to 3.5MHz. The low proﬁle

(0.75mm) 14-pin, 4mm × 3mm DFN package provides

excellent thermal performance in a small footprint. The

LT3479 is also available in a thermally enhanced 16-pin

TSSOP package.

Wide Input Voltage Range: 2.5V to 24V

3A, 42V Internal Switch

High Efﬁciency Power Conversion: Up to 89%

Soft-Start

Frequency Set by External Resistor: 200kHz to

3.5MHz

Protection Against Input Short Circuits and

Hot Plugging

Low V

Switch: 0.3V at 2.5A (Typical)

CESAT

Capable of Positive and Negative Outputs

Available in Thermally Enhanced 14-Lead

(4mm × 3mm) DFN and 16-Lead TSSOP Packages

APPLICATIONS

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

All other trademarks are the property of their respective owners.

High Power LED Driver

DSL Modems

Distributed Power

TYPICAL APPLICATION

5V to 12V Boost Converter

5V to 12V Efﬁciency

4.7μH

12V

0.8A

OUT

2.2μF

10μF

200k

FBN

SHDN

23.2k

LT3479

GND

REF

FBP

10nF

10k

2.2nF

17.8k

0.4

(A)

0.6

0.8

0.2

3479 TA01

OUT

3479 TA02

3479fb

12 3 4 5 6 7...20

中文翻译

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