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Product Specification
Highly-Integrated Green-Mode PWM Controller
SG6846
© System General Corp.
- 11 -
www.sg.com.tw
Version 1.0(IAO33.0008.B0)
Sep. 30, 2004
REFERENCE CIRCUIT
Application circuit for 32V/16V output
F1
+
C2
R16
+C12
+C13
FB
P16V
P32V
P16V
CX1
32V
RI
4
VIN
3
FB
2
GND
1
RT
5
SENSE
6
VDD
7
GATE
8
U1
LF2
+
C3
+
C5
LF1
VZ1
RT1
R1
R2
R3
R4
R12 C4
2
1
D2
C6
2
1
D1
U2
R18
R15
R20
R
U3
R21
R19
C9
1
3
2
D4
R7
R13
R14
1
Q1
L1
C7
1
4
BD1
5
1
7
9
11
13
3
6
10
TX1
R17
+C14
+C15
16V
C11
1
3
2
D5
L2
P32V
P16V
2
1
D3
1
2
L4
R8
R9
R5
+
C1
R6
R10
NTC1
CX2
P1
P2
FB
L3
+
C16
+
C17
CY1
CY2
P7
R11
FB
16V
32V
P32V
P16V
P32V
P16V
P16V
BOM
PART NO.
VALUE
PART NO.
VALUE
PART NO.
VALUE
R1, R2, R3, R4
470KΩ +/-5%
C4
103 P 630V
D3
FR103 1.0A 200V
R8, R9
S1MΩ +/-1%
C10,C11
102 P 1KV
BD1
DBL406G
R5
16K2Ω +/-1%
C6,C7
102 P 50V
D4
BYT28-300
R15
1K5Ω +/-5%
C9
222 P 50V
D5
BYV32-150
R13
10Ω +/-5%
C14,C17
470u 25V
F1
250V4A QUICK
R18
4K7Ω +/-5%
C15
220u 25V
L1,L2
1.8uH
R21
15KΩ +/-1%
C13,C16
220u 50V
L4
10uH
R7
27KΩ +/-5%
C2
150u 400V
U3
TL431 +/-1%
R6
330Ω +/-1%
C1
4u7 50V
U1
SG 6846
R19
102KΩ +/-1%
C3
10u 50V
U2
PC817
R14
0Ω22 +/-5%
CX1
X1 0.47u 275V
Q1
7NB60
R16, R17
1W 20Ω +/-5%
C8
Y2 222P 250V
TX1
EI-33
R11
20KΩ +/-5%
C5
100u 50V
RT1
SCK053
R12
100KΩ +/-5%
CX2
X2 0.1uF 275V
VZ1
14ψ 470V
R20
887KΩ +/-1%
D1
1N4148
R22
10KΩ +/-1%
D2
BYV95C