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參數資料
| 型號： | FSDM1265RBWDTU |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Green Mode Fairchild Power Switch (FPS) |
| 中文描述： | 3.8 A SWITCHING REGULATOR, ZFM6 |
| 封裝： | TO-220F, 6 PIN |
| 文件頁數： | 14/20頁 |
| 文件大小： | 380K |
| 代理商： | FSDM1265RBWDTU |
FSDM1265RB
14
Typical Application Circuit
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
several
protection functions
Internal soft-start (10ms)
Key Design Notes
Resistors R102 and R105 are employed to prevent start-up at low input voltage. After start
-
up, there is no power loss in
these resistors since the start
-
up pin is internally disconnected after start-up.
The delay time for OLP is designed to be about 50ms with C106 of 47nF. If you require a faster triggering of OLP , reduce
the
C106 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) to blow and prevents explosion of the opto-coupler (IC301). The zener
diode also increases immunity against a line surge.
1. Schematic
Application
Output Power
Input Voltage
Universal input
Output Voltage (Max. Current)
5V (4.0A)
LCD Monitor
62W
(85-265Vac)
12V (3.5A)
3
4
220nF
275VA
C
LF101
23mH
C101
220nF
275VA
C
RT1
5D-9
F1
FUSE
250V
2A
C103
200uF
400V
R102
30k
R105
40k
R103
56k
2W
C104
2.2nF
1kV
D101
UF 4007
C106
47nF
50V
C105
47uF
50V
D102
TVR10G
R104
5
1
2
3
4
5
T1
EER3016
BD101
2KBP06M3N257
1
2
R101
560k
1W
IC1
FSDM1265R
B
Vstr
NC
Vf
b
Vcc
Drain
GND
1
2
3
4
5
6
ZD101
22V
8
10
D202
MBRF10100
C201
1000uF
25V
C202
1000u
F
25V
L20
1
12V,
3.5A
6
7
D201
MBRF1045
C203
1000uF
10V
C204
1000u
F
10V
L20
2
5V, 4A
R201
1k
R202
1.2k
R204
10k
R203
12k
C205
47nF
R205
10k
C301
4.7nF
IC301
H11A817A
IC201
KA431
ZD102
10V
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