FAN7602 Fairchild Semiconductor, FAN7602 Datasheet - Page 12

• Manufacturer Part Number: FAN7602
• Description: Green Current Mode PWM Controller
• Manufacturer: Fairchild Semiconductor

FAN7602 Rev. 1.0.2
© 2006 Fairchild Semiconductor Corporation
Typical application circuit
Features
Key Design Notes
1. Schematic
Low stand-by power (<0.3W @ 265V
Constant output power control
All the IC-related components should be placed close to IC, especially C107 and C110.
If R106 value is too low, there can be subharmonic oscillation.
R109 should be designed carefully to make the V
load.
R110 should be designed carefully to make the V
full load.
R103 should be designed to keep the MOSFET Vds voltage lower than maximum rating when the output is shorted.
Application
Adapter
C103 C104
AC INPUT
BD101
R101
C101
C102
FUSE
Output power
C105
R112
R113
C110
R107
C107
48W
R114
R102
1
2
3
4
AC
LUVP
Latch/
CS/FB
Plimit
GND
)
R105
IC101
Figure 26. Schematic
D101
Out
Vstr
NC
V
CC
CC
CC
Input voltage
Q101
R108
Universal input
voltage lower than OVP level when the input voltage is 85V
(85~265V
8
7
6
5
voltage higher than 8V when the input voltage is 265V
12
R104
D103
1
3
T1
AC
12
9
6
5
C108
D102
)
R206
C109
D202
D204
R109
4
3
4
3
R111
C201
C204
ZD101
OP2
OP1
R110
IC201
1
2
1
2
3
2
Output voltage
ZD201
R203
L201
R202
1
R207
C222
C203
12V
R204
R205
FAN7602 Rev. 02
C202
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