Low Cost Green-Mode PWM Controller for Flyback Converters
Product Specification
SG6848
REFERENCE CIRCUIT
Circuit
F1
L
CX1
2-
N
L1
1
2
BD1
+4
C1
R1
+
C2
R2
U1
R7
1 GND GATE 6
2 FB
VDD 5
C6
3 RI SENSE 4
R9
1
R8
C3 R3
R5 R4
T1
10
D1
9
8
5
Q1
7
R6
D2
1
2
+
C4
U2
4
3
D4
2
1
1,2
L2
1
2
R10 C7
+
C8
+
D5
C9
3,4
VO
GND
R11
1
2
R13
R14
CY1
C10
U3
1
R12
BOM
Reference Component
BD1
BD 1A/500V
CX1 (Optional) YC 472P/400V (Y1)
CY1 (Optional) YC 102P/400V (Y1)
C2
EC 10uF/400V 105℃
C1
CC 103P/500V
C3
CC 1000P/500V
C4
EC 10u/50V
C6
CC 472P 0805
C7 (Optional) CC 102P/100V 1206
C8
EC 470u/10V 105℃
C9
EC 220u/10V 105℃
C10
CC 222P 0805
D1
Diode FRI07
D2
Diode FR102
D4
Diode SB360
D5 (Optional) ZD 6.8V 0.5W
F1
R 1Ω/0.5W
L1
20mH 6*8mm
© System General Corp.
Version 1.4(IRO33.0010.B2)
Reference
Component
L2
10uH 6mm
Q1
MOSFET 1A/600V
R1,R2
R 750KΩ 1206
R4,R3
R 47KΩ 1206
R5
R 47Ω 1206
R6
R 4.7Ω 1206
R7
R 100Ω 0805
R8
R 10Ω 1206
R10
(Optional) R 10Ω 1206
R9
R 100KΩ 0805
R11
R 100Ω 1/8W
R12
R 33KΩ 0805
R13
R 33KΩ 1/8W
R14
R 4.7KΩ 0805
T1
EE-16
U1
IC SG6848 (Green PWM IC)
U2
PC817
U3
TL431
- 10 -
www.sg.com.tw
Apr.08, 2004