SG6841DZ3 Datasheet, PDF (11/14 Pages) Fairchild Semiconductor – High-integrated Green-mode PWM Controller

High-integrated Green-mode PWM Controller
REFERENCE CIRCUIT
Circuit
Product Specification
SG6841
CN1
1
2
3
F1
VZ1
THER1
3 _L1 4
1
2
1
2
R1
3 _L2 4
C1
1
2
R2
4
C2
BD1
1
+
C4
C3 R3
1,2 _1,2
C5
R5
R7
U1
1 _{GND GATE} 8
2
FB
7
VDD
3 _{VIN SENSE} 6
4
RI
5
RT
SG6841
R9
R10
THER2
1
R12
+ C9
D2
3
4
3
4
Q2
55
R8
D4
1
2
U2
4
3
Q1
1
8,9 ^{8,9 3}
2
L3
1
2
R4 C6 _{C7 +}
C8 ⁺
6,7 ^6,7
R11
1
2
R13
C10
U3
1
R14
Vo+
R15
Vo+
D1
D3
R6
BOM
Reference
BD1
C1
C2
C3
C4
C5
C6
C7
C8
C9
D1
D2
D3
D4
F1
L1
L2
Q1
Q2
Component
BD 4A/600V
XC 0.1uF/275V
XC 0.22uF/275V
CC 0.01uF/500V
EC 120u/400V
YC 222p/Y1
CC 1000pF/100V
CC 1000pF/50V
EC 1000uF/35V
EC 220uF/35V
LED
Diode FR157
ZD 18V
Diode FR102
FUSE 4A/250V
900uH
15mH
Diode 20A100V
MOS 7A/600V
©System General Corp.
Version 2.1 (IRO33.0001.B5)
Reference
R1,R2
R3
R4
R5,R7
R6
R8
R9
R9
R11
R12
R13
R14
R15
THER1
T1
U1
U2
U3
VZ1
Component
R 1Mohm 1/4W
R 100Kohm 1/2W
R 47ohm 1/4W
R 750Kohm 1/4W
R 20Kohm 1/8W
R 0.3ohm 2W
R 33Kohm 1/8W
R 20Kohm 1/8W 1%
R 220ohm 1/8W
R 4.7ohm 1/8W
R 6.8Kohm 1/8W
R 154Kohm 1/8W
R 390Kohm 1/8W
Thermistor SCK054
Transformer
IC SG6841
IC PC817
IC TL431
VZ 9G
- 11 -
www.sg.com.tw
Jun.15,2006