SG6741A View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

SG6741A

Highly Integrated Green-Mode PWM Controller

Fairchild Semiconductor 

Reference Circuit

BD1

CN1

L1

T1

VZ1

1

2

C1

C2

4

1

3

4 T2 8

R2

C6

1

2

3

CN1

+

C5

R1

5

Q1

1

L4

2

VO+

VO+

C4

6

L2

C3

2

+

+

C7

C8

D1

3

7

D2

VO-

R3

U1 SG6741A

1 GND GATE 8

2

FB

VDD

7

C12

3 NC SENSE 6

4 HV

RI 5

R4

D3

1

2

+

C9

Q2

1

R5

R6

C10

R7

R8

U2

VO+

R9

R10

C11

R

U3

R11

Figure 14. Circuit (12V/5A)

BOM

Reference

BD1

C1

C2

C3

C4

C5

C6

C7

C8

C9

C10

C11

C12

D1

D2

D3

F1

L1

Q1

Component

BD 4A/600V

XC 0.68µF/300V

XC 0.1µF/300V

YC 222pF/Y1

EC 120µF/400V

CC 0.01µF/500V

CC 102pF/100V

EC 1000µF/25V

EC 470µF/25V

EC 22µF/50V

CC 470pF/50V

CC 222pF/50V

CC 103pF/50V

Zener Diode 15V 1/2W (option)

BYV95C

FR103

FUSE 4A/250V

900µH

STP20-100CT

Reference

Q2

R1

R2

R3

R4

R5

R6

R7

R8

R9

R10

R11

T1

T2

U1

U2

U3

VZ1

Component

MOS 7A/600V

R 100KΩ 1/2W

R 47Ω 1/4W

R 100KΩ 1/2W

R 20Ω 1/8W

R 100Ω 1/8W

R 33KΩ 1/8W

R 0.3Ω 2W

R 680Ω m 1/8W

R 4.7KΩ 1/8W

R 150KΩ m 1/8W

R 39KΩ 1/8W

10mH

600µH(PQ2620)

IC SG6741A

IC PC817

IC TL431

VZ 9G

© 2008 Fairchild Semiconductor Corporation

SG6741A • Rev. 1.0.1

10

www.fairchildsemi.com

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