SG6742MR_ML Fairchild Semiconductor, SG6742MR_ML Datasheet - Page 11

• Manufacturer Part Number: SG6742MR_ML
• Description: The highly integrated SG6742ML/MR PWM controller provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
SG6742ML/MR • Rev. 1.0.4
Applications Information
BOM
BD1
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
D1
D2
D3
D4
F1
L1
L2
Designator
CN1
CN1
1
2
3
F1
L1
C1
BD 4A/600V
XC 0.68µF/300V
XC 0.1µF/300V
YC 2200pF/Y1
EC 120µF/400V
CC 0.01µF/500V
CC 1000pF/100V
EC 1000µF/25V
EC 470µF/25V
EC 22µF/50V
CC 47pF/50V
CC 2200pF/50V
CC 0.01µF/50V
Zener Diode 15V 1/2W (option)
BYV95C
FR103
1N4007
FUSE 4A/250V
Inductor (900µH)
Inductor (2µH)
C12
T1
1
2
3
4
Figure 21. 60W Flyback 12V/5A Application Circuit
R3
U1
GND
FB
NC
HV
C2
SG6742MR
SENSE
GATE
Part Type
VDD
D4
RT
8
7
6
5
VZ1
R6
C3
+
THER1
4
C9
1
D3
C10
BD1
R4
2
1
R5
U2
U3
+
C4
11
L3
Q1
Q2
R1
R2
R3
R4
R5
R6, R9
R7
R8
R10
R11
THER1
T2
U1
U2
U3
VZ1
1
T1
R9
R
D2
C11
R8
C5
Q2
R7
Designator
R1
R10
R11
VO+
4
5
6
2
3
T2
8
7
1
3
Q1
R2
Inductor (900µH)
STP20-100CT
MOS 7A/600V
R 100KΩ 1/2W
R 47Ω 1/4W
R 100KΩ 1/2W
R 4.7Ω 1/8W
R 100Ω 1/8W
R 4.7KΩ 1/8W
R 0.3Ω 2W
R 680Ω 1/8W
R 150KΩ 1/8W
R 39KΩ 1/8W
Thermistor TTC104
10mH
600µH(PQ2620)
IC SG6742
IC PC817
IC TL431
VZ 9G
C6
2
+
C7
1
L2
Part Type
2
+
VO+
C8
L3
www.fairchildsemi.com
D1
VO+
VO-