SG6846 View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
SG6846 Datasheet PDF : 16 Pages
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Reference Circuit
P1 F1
P2
P7
RT1
CY1
VZ1
LF1 CY2
CX1LF2
CX2 4
R1
R2
R3
R4
BD1
1
R8
+
C2
R12 C4
D2
1
2
R9
D1
1
L4 D3
21
12
2
+
C3
+
C5
R11
TX1
5
13
6
10
7
9
1
3
11
R16
D4
P32V
1
L1 P32V
2
3
C16+ +C12
C11 R17
1
3
D5
P16V
L2 P16V
2
C17+ +C14
32V 32V
+C13
16V 16V
+C15
C1 +
U1
1
GND
FB 2 FB
3
VIN
R5
4
RI
R7
GATE
8
VDD 7
SENSE
6
RT 5 R10
R13 1
R6
C6
NTC1
Q1
L3
R14
P16V
P16V
FB
FB
C7
R15
P16V
P32V
P16V
C9
P32V
R18 R19 R20
U2
R
U3
R21
Figure 20. Application Circuit for 32V / 16V Output
BOM
Part No.
R1, R2, R3, R4
R8, R9
R5
R15
R13
R18
R21
R7
R6
R19
R14
R16, R17
R11
R12
R20
R22
Value
470KΩ +/-5%
S1MΩ +/-1%
16K2Ω +/-1%
1K5Ω +/-5%
10Ω +/-5%
4K7Ω +/-5%
15KΩ +/-1%
27KΩ +/-5%
330Ω +/-1%
102KΩ +/-1%
0Ω22 +/-5%
1W 20Ω +/-5%
20KΩ +/-5%
100KΩ +/-5%
887KΩ +/-1%
10KΩ +/-1%
Part No.
C4
C10,C11
C6,C7
C9
C14,C17
C15
C13,C16
C2
C1
C3
CX1
C8
C5
CX2
D1
D2
Value
103 P 630V
102 P 1KV
102 P 50V
222 P 50V
470µ 25V
220µ 25V
220µ 50V
150µ 400V
4.7µ 50V
10µ 50V
X1 0.47µ 275V
Y2 222P 250V
100µ 50V
X2 0.1µF 275V
1N4148
BYV95C
Part No.
D3
BD1
D4
D5
F1
L1,L2
L4
U3
U1
U2
Q1
TX1
RT1
VZ1
Value
FR103 1.0A 200V
DBL406G
BYT28-300
BYV32-150
250V4A QUICK
1.8µH
10µH
TL431 +/-1%
SG 6846
PC817
7NB60
EI-33
SCK053
14ψ 470V
© 2008 Fairchild Semiconductor Corporation
SG6846 • Rev. 1.3.1
13
www.fairchildsemi.com
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