DM0465RS データシートの表示（PDF） - Fairchild Semiconductor
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DM0465RS Datasheet PDF : 19 Pages
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Typical Application Circuit
Application
LCD Monitor
Output Power
34W
Input Voltage
Universal Input
(85-265VAC)
Output Voltage (Maximum Current)
5V (2.0A)
12V (2.0A)
Features
! High Efficiency (>81% at 85VAC Input)
! Low Zero Load Power Consumption (<300mW at 240VAC Input)
! Low Standby Mode Power Consumption (<800mW at 240VAC Input and 0.3W Load)
! Low Component Count
! Enhanced System Reliability through Various Protection Functions
! Internal Soft-Start (10ms)
Key Design Notes
! Resistors R102 and R105 are employed to prevent startup at low input voltage. After startup, there is no power loss
in these resistors since the startup pin is internally disconnected after startup.
! The delay time for overload protection is designed to be about 50ms with C106 of 47nF. If a faster triggering of OLP
is required, C106 can be reduced to 10nF.
! Zener diode ZD102 is used for a safety test such as UL. When the drain pin and feedback pin are shorted, the zener
diode fails and remains short, which causes the fuse (F1) blown and prevents explosion of the opto-coupler (IC301).
This zener diode also increases the immunity against line surge.
1. Schematic
BD101
2
2KBP06M3N257
1
4
C102
220nF
275VAC
C103
100μF
400V
3
R102
30kΩ
R105
40kΩ
ZD102
10V
C106
47nF
50V
R103
56kΩ
2W
C104
2.2nF
1kV
IC1
FSDM04565RS
6 Vstr
Drain 1
5
NC
4 Vfb
Vcc 3
GND
2 ZD101
22V
D101
UF 4007
T1
D202
EER3016 MBRF10100
1
10
C201
1000μF
25V
2
8
3
4
C105 D102 R104
22μF UF4004 5Ω
50V
5
D201
MBRF1045
7
C203
1000μF
10V
6
L201
C202
1000μF
25V
L202
C204
1000μF
10V
12V, 2.5A
5V, 2A
LF101
23mH
R101
560kΩ
1W
RT1
5D-9
C101
220nF
275VAC
F1
FUSE
250V
2A
C301
4.7nF
R201
1kΩ
IC301
H11A817A
R202
1.2kΩ
IC201
KA431
R203
12kΩ
R204
5.6kΩ
C205
47nF
R205
5.6kΩ
FSDM0465RS Rev: 00
Figure 23. Demo Circuit
© 2008 Fairchild Semiconductor Corporation
FSDM0465RS Rev. 1.0.1
14
www.fairchildsemi.com
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