FSQ0465RS Fairchild Semiconductor, FSQ0465RS Datasheet - Page 18

• Manufacturer Part Number: FSQ0465RS
• Description: A Quasi-Resonant Converter (QRC) generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency
• Manufacturer: Fairchild Semiconductor

FSQ0465RS/RB Rev. 1.0.1
© 2008 Fairchild Semiconductor Corporation
Typical Application Circuit
Features
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Key Design Notes
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1. Schematic
Average efficiency of 25%, 50%, 75%, and 100% load conditions is higher than 80% at universal input
Low standby mode power consumption (<1W at 230V
Reduce EMI noise through valley switching operation
Enhanced system reliability through various protection functions
Internal soft-start (17.5ms)
The delay time for overload protection is designed to be about 23ms with C105 of 33nF. If faster/slower triggering of
OLP is required, C105 can be changed to a smaller/larger value (e.g. 100nF for 70ms).
The input voltage of V
to avoid OVP triggering during normal operation.
The SMD-type 100nF capacitor must be placed as close as possible to V
sating noises and to improve surge immunity.
Power Supply
Application
LCD Monitor
2KBP06M3N25
5D-9
RT1
BD101
7
FSQ0465 Rev.00
1
275VAC
275V
150nF
150nF
C102
C101
LF101
R101
34mH
2MΩ
2
4
1W
AC
3
100μF
C103
400V
FPS™ Device
FUSE
250V
FSQ0465RS
F1
2A
Sync
R102
68kΩ
must be between 4.7V and 8V just after MOSFET turn-off to guarantee hybrid control and
C105
33nF
100V
Optional components
R103
33kΩ
1W
Figure 37. Demo Circuit of FSQ0465RS
5
6
4
Sync
V
Vfb
FSQ0465R
str
GND
Input Voltage
2
Drain
Vcc
85-265V
4.7nF
C104
630V
1N4745A
Range
1
3
ZD101
R105
100Ω
0.5W
R104
0.5W
5.6Ω
100nF
C106
SMD
AC
C107
47μF
1N 4007
50V
AC
D101
UF 4004 R107
D102
18
input and 0.5W load)
R108
12kΩ
18kΩ
Rated Output Power
4
5
1
2
3
40W
EER3016
4.7nF
C301
1kV
FOD817A
CC
T1
IC301
pin to avoid malfunction by abrupt pul-
MBRF10H100
10
7
8
MBRF1060
6
1000μF
D202
1000μF
D201
C201
C203
25V
10V
R201
1kΩ
KA431
IC201
1.2kΩ
R202
(Maximum Current)
R203
10kΩ
L201
L202
5μH
5μH
Output Voltage
1000μF
1000μF
C204
C202
10V
25V
5.0V (2.0A)
13V (2.3A)
C205
47nF
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R204
R205
4kΩ
4kΩ
13V,
2.3A
5V, 2A