Datasheet > LT3748IMSTRPBF

LT3748IMSTRPBF

更新时间： 2024-11-09 05:43:35

品牌	Logo	应用领域
凌特 - Linear		控制器
页数	文件大小	规格书
30页	281K
描述
100V Isolated Flyback Controller

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中文翻译

获取价格

数据手册

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LT3748IMSTRPBF 数据手册

LT3748

100V Isolated

Flyback Controller

FEATURES

DESCRIPTION

TheLT^®3748isaswitchingregulatorcontrollerspecifically

designed for the isolated flyback topology and capable of

high power. It drives a low side external N-channel power

MOSFET from an internally regulated 7V supply. No third

winding or opto-isolator is required for regulation as the

part senses the isolated output voltage directly from the

primary-side flyback waveform.

5V to 100V Input Voltage Range

1.9A Average Gate Drive Source and Sink Current

Boundary Mode Operation

No Transformer Third Winding or Opto-Isolator

Required for Regulation

Primary-Side Winding Feedback Load Regulation

Set with Two External Resistors

OUT

INTV Pin for Control of Gate Driver Voltage

The LT3748 utilizes boundary mode to provide a small

magnetic solution without compromising load regulation.

Operatingfrequencyissetbyloadcurrentandtransformer

magnetizing inductance. The gate drive of the LT3748

combined with a suitable external MOSFET allow it to

deliver load power up to several tens of watts from input

voltages as high as 100V.

Programmable Soft Start

Programmable Undervoltage Lockout

Available in MSOP Package

APPLICATIONS

Isolated Telecom Converters

The LT3748 is available in a high voltage 16-lead MSOP

package with four leads removed.

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 5438499 and 7471522.

High Power Automotive Supplies

Isolated Industrial Power Supplies

TYPICAL APPLICATION

25W, 12V Output, Isolated Telecom Supply

Output Load and Line Regulation

12V

OUT

4:1

12.6

14.4

36V TO 72V

10μF

412k

100μF

60.8μH

243k

3.8μH

EN/UVLO

–

12.2

12.0

15.4k

OUT

REF

6.04k

LT3748

11.8

11.6

11.4

GATE

= 72V

= 48V

= 36V

SENSE

GND INTV

0.033Ω

0.5

1.0

1.5

2.0

56.2k

10k

4700pF

2nF

3748 TA01a

LOAD CURRENT (A)

4.7μF

3748 TA01b

3748fa

12 3 4 5 6 7...30

中文翻译

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