FSQ0565RQ Fairchild Semiconductor, FSQ0565RQ Datasheet - Page 18

• Manufacturer Part Number: FSQ0565RQ
• 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

FSQ0565RS/RQ Rev. 1.0.3
© 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
by abrupt pulsating noises and to improve surge immunity.
Power Supply
Application
LCD Monitor
FSQ0565RS Rev.00
5D-9
2KBP06M
RT1
BD101
1
275VAC
275V
150nF
150nF
C102
12MΩ
C101
LF101
R101
30mH
2
4
1W
AC
3
100μF
C103
400V
FPS™ Device
FUSE
250V
FSQ0565RS
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
43kΩ
1W
Figure 39. Demo Circuit of FSQ0565RS
5
6
4
Sync
V
Vfb
FSQ0565RS
str
GND
Input Voltage
2
Drain
Vcc
85-265V
3.3nF
C104
630V
1N4745A
Range
1
3
ZD101
R105
100Ω
0.5W
100nF
C106
SMD
AC
C107
47μF
1N 4007
50V
AC
D101
UF 4004 R107
D102
18
input and 0.5W load)
R108
27kΩ
39kΩ
Rated Output Power
4
5
1
2
3
50W
EER3016
4.7nF
C301
1kV
FOD817A
CC
T1
IC301
pin to avoid malfunction
MBRF10H100
10
7
8
MBRF1060
6
1000μF
D202
2200μF
D201
C201
C203
25V
10V
620Ω
R201
KA431
IC201
1.2kΩ
R202
(Maximum Current)
R203
18kΩ
L201
L202
5μH
5μH
Output Voltage
1000μF
1000μF
C204
C202
10V
25V
5.0V (2.0A)
14V (2.8A)
C205
47nF
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R204
R205
8kΩ
8kΩ
14V,
2.8A
5V, 2A