SG5842JA Fairchild Semiconductor, SG5842JA Datasheet - Page 12

• Manufacturer Part Number: SG5842JA
• Description: The highly integrated SG5842A/JA series of PWM controllers provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2007 Fairchild Semiconductor Corporation
SG5842A/SG5842JA • Rev. 1.4.3
Reference Circuit
CN1
BOM
1
2
3
Reference
BD1
C10
C11
C1
C2
C3
C4
C5
C6
C7
C8
C9
D1
D2
D3
D4
Q1
F1
L1
L2
L3
TR1
VZ1
L1
CC 1000pF/100V
C1
CC 0.01µF/500V
XC 0.68µF/300V
Diode 20A/100V
EC 1000µF/25V
XC 0.1µF/300V
Choke (900µH)
Diode BYV95C
FUSE 4A/250V
EC 470µF/25V
CC 222pF/50V
CC 470pF/50V
EC 120µ/400V
YC 222p/250V
TVS P6KE16A
Choke (10mH)
Inductor (2µH)
Component
EC 10µF/50V
Diode FR103
BD 4A/600V
R1
R2
R5
R7
LED
R9
1
2
3
4
L2
U1
SG5842A/JA
GND
FB
VIN
RI
C2
SENSE
GATE
VDD
C5
RT
4
Figure 15. Reference Circuit
THER2
8
7
6
5
BD1
R10
C11
C4
1
R16
R1, R2, R5, R7
+
1
C9
Reference
12
THER2
C3
D2
+
R10
R11
R12
R13
R14
R15
R16
VZ1
Q2
R3
R4
R6
R8
R9
U1
U2
U3
T1
Q2
R8
R3
R12
D4
U2
T1
U3
Transformer (600µH-PQ2620)
C6
1
3
R13
R
Q1
Thermistor TTC104
R 154KΩ 1/8W 1%
R 39KΩ 1/8W 1%
R15
IC SG5842A/JA
C10
R 100Ωm 1/8W
R4
R 470KΩ 1/4W
R 100KΩ 1/2W
R 4.7KΩ 1/8W
R 4.7KΩ 1/8W
MOS 7A/600V
Component
R 33KΩ 1/8W
R 470Ω 1/8W
R 2KΩ 1/8W
R 47Ω 1/4W
R 0.3Ω 2W
R 0Ω 1/8W
R14
IC PC817
2
IC TL431
VZ 9G
C7
+
1
VO+
R11
L3
2
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+
C8
D3
R6
D1
Vo+