LT3574IMS-PBF 데이터 시트보기 (PDF) - Linear Technology

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LT3574IMS-PBF

Isolated Flyback Converter Without an Opto-Coupler

Linear Technology 

LT3574

block diagram

VIN

C1

R3

T1 D1

N:1

•

L1A

L1B

•

VOUT +

C2

VOUT –

VIN

RFB

TC

CURRENT Q3

Q2

TC

R6

I2

20µA

1.23V

FLYBACK

ERROR

AMP

+–gm

CURRENT

COMPARATOR

–

+A1

RREF

R4

BIAS

C5

R1

SHDN/UVLO 1.22V

+

–A5

INTERNAL

REFERENCE

AND

REGULATORS

I1

7µA

R2

2.5µA

SW

ONE

SHOT

A2

+

V1

120mV –

VIN

DRIVER

SR

Q

S

BIAS

Q1

MASTER

LATCH

A4

RSENSE

0.036Ω

GND

OSCILLATOR

VC

Q4

SS

C3

RILIM

R7

C4

3574 BD

R5

3574f



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