SG6859A Fairchild Semiconductor, SG6859A Datasheet - Page 10

• Manufacturer Part Number: SG6859A
• Description: This highly integrated PWM controller provides several special enhancements designed to meet the low standby-power needs of low-power SMPS
• Manufacturer: Fairchild Semiconductor

© 2007 Fairchild Semiconductor Corporation
SG6859A • Rev. 1.0.4
Applications Information
Bill of Materials (BOM)
BD1
CX1 (Optional)
CY1 (Optional)
C1
C2
C3
C4
C6
C7 (Optional)
C8
C9
C10
C11
D1
D2
D4
D5 (Optional)
F1
L1
Reference
L
N
F1
CX1
BD 1A/500V
XC 0.1μF
YC 1nF/400V (Y1)
CC 10nF/500V
EC 10μF/400V 105°C
CC 1nF/500V
EC 10μF/50V
CC 4.7nF 0805
CC 1nF/100V 1206
EC 470μF/10V 105°C
EC 220μF/10V 105°C
CC 2.2nF 0805
N.C.
Diode FRI07
Diode FR102
Diode SB360
ZD 6.8V 0.5W
R 1Ω/0.5W
20mH 6•8mm
C6
2
R9
1
2
3
Component
U1
BD1
GND
FB
RI
SENSE
GATE
4
VDD
1
C1
6
5
4
L1
R7
Figure 16. Reference Circuit
C4
2
C2
C11
R8
1
R15
R1
R2
1
L2
Q1
R1,R2
R3,R4
R5
R6
R7
R8
R9
R10 (Optional)
R11
R12
R13
R14
R15
T1
U1
U2
U3
R5
R6
C3
D1
Q1
D2
Reference
10
R3
R4
2
10
9
8
5
7
U2
T1
CY1
1,2
3,4
10µH 6mm
MOSFET 1A/600V
R 750KΩ 1206
R 47KΩ 1206
R 47Ω 1206
R 4.7Ω 1206
R 100Ω 0805
R 10Ω 1206
R 100KΩ 0805
R 10Ω 1206
R 100Ω 1/8W
R 33KΩ 0805
R 33KΩ 1/8W
R 4.7KΩ 0805
R 0Ω 0805
EE-16
IC SG6859A
PC817
TL431
2
R10
D4
R11
C7
1
C8
U3
R14
1
1
Component
D5
L2
C10
2
C9
R13
R12
VO
GND
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