LT3837 datasheet(1/28 Pages) LINER

部件名	LT3837

功能描述	Isolated No-Opto Synchronous Flyback Controller

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制造商	LINER [Linear Technology]

网页	http://www.linear.com

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LT3837

1

3837fa

47pF

2.2nF

10Ω

22μF

3k

22.1k

100k

BAS16

150k

12k

330Ω

15Ω

10Ω

100nH

8mΩ

Si7852DP

Si7336ADP

B0540W

1.37k

3.3nF

20k

1nF

1μF

0.1μF

2.2nF

BAT54

OSC

VC

FB

UVLO

PG

SENSE+

SENSE–

SG

SFST

tON

ENDLY

PGDLY

RCMP

CCMP

GND

VCC

LT3837

86.6k

10μF

VIN

••

15k

10k

3837 TA01

47μF

3

220μF

OUTPUT 3.3V/10A

2N3906

FMMT718

FMMT618

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Isolated No-Opto

Synchronous Flyback Controller

The LT®3837 is an isolated switching regulator controller

designed for medium power ﬂyback topologies. A typical

application is 10W to 60W with the part powered from a

DC supply.

The LT3837 is a current mode controller that regulates an

output voltage based on sensing the secondary voltage

via a transformer winding during ﬂyback. This allows for

tight output regulation without the use of an optoisolator,

improving dynamic response and reliability. Synchronous

rectiﬁcation increases converter efﬁciency and improves

output cross regulation in multiple output converters.

The LT3837 operates in forced continuous conduction

mode which improves cross regulation in multiple winding

applications. Switching frequency is user programmable

and can be externally synchronized. The part also has load

compensation, undervoltage lockout and soft-start circuitry.

The LT3837 is available in a thermally enhanced 16-pin

TSSOP package.

9V –18V to 3.3V at 10A Isolated Converter

n Senses Output Voltage Directly from Primary Side

Winding—No Optoisolator Required

n Synchronous Driver for High Efﬁciency

n Supply Voltage Range 4.5V to 20V

n Accurate Regulation Without User Trims

n Programmable Switching Frequency from

50kHz to 250kHz

n Synchronizable

n Load Compensation

n Undervoltage Lockout

n Available in a Thermally Enhanced 16-Lead

TSSOP Package

n Isolated Medium Power (10W to 60W) Supplies

n Instrumentation Power Supplies

n Isolated Medical Supplies

LOAD CURRENT (A)

2

78

76

80

84

86

88

3

7

9

3837 TA01b

82

90

6

4

5

810

9VIN

18VIN

LOAD CURRENT (A)

3.00

3.10

3.30

3.40

3.50

3.60

3837 TA01c

3.20

2

3

7

9

6

4

5

810

9VIN

18VIN

Efﬁciency vs Load Current

Regulation vs Load Current

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

All other trademarks are the property of their respective owners.

Protected by U.S. Patents including 6498466, 5841643.

类似零件编号 - LT3837

制造商	部件名	数据表	功能描述
Linear Technology	LT3837	343Kb / 24P	10A High Effi ciency DC/DC 關Module
	LT3837	574Kb / 26P	Low VIN, 8A DC/DC Module Regulator with Tracking, Margining, and Frequency Synchronization
	LT3837	321Kb / 28P	Isolated No-Opto Synchronous Flyback Controller

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类似说明 - LT3837

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