FAN7621 データシートの表示（PDF） - Fairchild Semiconductor

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FAN7621

PFM Controller for Half-Bridge Resonant Converters

Fairchild Semiconductor 

Typical Application Circuit (Half-Bridge LLC Resonant Converter)

Application

LCD TV

Device

FAN7621

Input Voltage Range

390VDC

(340~400VDC)

Rated Output Power

192W

Output Voltage

(Rated Current)

24V-8A

Features

ƒ High efficiency ( >94% at 400VDC input)

ƒ Reduced EMI noise through zero-voltage-switching (ZVS)

ƒ Enhanced system reliability with various protection functions

C110

ope n

F101

3.15A/250V

C 101

220 µF / 450V

VIN =340 ~400 VDC

V CC =16~ 20V DC

R 109

1M

R 110

1M

R 111

45k

R 108

10k

R 104

5.1k

U2

R 103 400k

U5

R 112

10k

U4

ZD 101

6.8V

R 105

7.5k

R 107

7.7k

C 107

10µF

C 111

680 pF

C 104

o pe n

C 108

12 nF

R 102

1k

JP 5

0

C105

0.33 µF

LVCC

HVCC

RT

HO

CON

CTR

LO

CS

C 103

100 pF

SG PG

D 101

1N 4937

C102

22 nF

D102

1N4148

R113

3.3

D102

1N4148

Q1

F C PF11N60F

C 106

150 nF

R 115

10k

R114

3.3

R 116

10k

Q2

F C PF11N60F

JP 1, 0

JP 2, 0

JP 3, 0

JP 4, 0

R101

0.2

Figure 29. Typical Application Circuit

EE R 3542

D 202

F Y P F2010 D N

C 201

C 202

2000 µF / 2000 µF /

35V

35V

VO

D 201

R 202

F Y P F 2010 D N 1k

R 201

10k

U2 R 204

62k

C 204

12 nF

R 205

2k

C 301

C203 R 203

47nF 33k

R205

7k

© 2009 Fairchild Semiconductor Corporation

FAN7621 • Rev. 1.0.1

13

www.fairchildsemi.com

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