Data Sheet

© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ0365, FSQ0265, FSQ0165, FSQ321 • Rev. 1.0.6 16
FSQ0365/0265/0165/321 — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter
Typical Application Circuit of FSQ0365RN
Application FPS Device
Input Voltage
Range
Rated Output Power
Output Voltage
(Maximum Current)
DVD Player
Power Supply
FSQ0365RN 85-265V
AC
19W
5.1V (1.0A)
3.4V (1.0A)
12V (0.4A)
16V (0.3A)
Features
 High efficiency ( >77% at universal input)
 Low standby mode power consumption (<1W at 230V
AC
input and 0.5W load)
 Reduce EMI noise through Valley Switching operation
 Enhanced system reliability through various protection functions
 Internal soft-start: 15ms
Key Design Notes
 The delay time for overload protection is designed to be about 30ms with C107 of 47nF. If faster/slower triggering
of OLP is required, C107 can be changed to a smaller/larger value (eg. 100nF for 60ms).
 The input voltage of V
sync
must be higher than -0.3V. By proper voltage sharing by R106 & R107 resistors, the input
voltage can be adjusted.
 The SMD-type 100nF capacitor must be placed as close as possible to V
CC
pin to avoid malfunction by abrupt
pulsating noises and to improved surge immunity
.
Schematic
3
4
C102
100nF,275V
AC
LF101
40mH
C101
100nF
275V
AC
F101
FUSE
C103
33F
400V
R102
56kΩ
C104
10nF
630V
D101
1N 4007
IC101
FSQ0365RN
C105
47nF
50V
C107
22F
50V
D102
1N 4004
R103
5Ω
1
2
3
4
5
8
9
6
12
10
11
T101
EER2828
D201
UF4003
C201
470F
35V
C202
470F
35V
L201
L203
L204
D202
UF4003
C203
470F
35V
C204
470F
35V
C206
1000F
10V
C205
1000F
10V
D203
SB360
D204
SB360
C207
1000F
10V
C208
1000F
10V
R201
510Ω
R202
1kΩ
R203
6.2kΩ
R204
20kΩ
C209
100nF
R205
6kΩ
IC202
FOD817A
BD101
Bridge
Diode
L202
V
str
Sync
FB
V
cc
Drain
GND
6
1
2
3
4
5
1
2
Drain
Drain
7
8
IC201
KA431
16V, 0.3A
12V, 0.4A
5.1V, 1A
3.4V, 1A
R104
12kΩ
TNR
10D471K
R105
100kΩ
R106
6.2kΩ
C302
3.3nF
AC IN
C106
100nF
SMD
D103
1N4148
C110
33pF
50V
ZD101
1N4746A
R107
6.2kΩ
RT101
5D-9
R108
62Ω
C209
47pF
C210
47pF
FSQ0365RN Rev:00
Figure 29. Demo Circuit of FSQ0365RN