FSFM261 Fairchild Semiconductor, FSFM261 Datasheet - Page 14

• Manufacturer Part Number: FSFM261
• Description: The FSFM260N/261N/300N is an integrated Pulse Width Modulator (PWM) and SenseFET specifically designed for high-performance offline Switch Mode Power Supplies (SMPS) with minimal external components
• Manufacturer: Fairchild Semiconductor

FSFM260N / FSFM261N / FSFM300N • Rev. 1.0.1
© 2009 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
Enhanced system reliability through various protection functions
Internal soft-start (15ms)
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 SMD-type 100nF capacitor must be placed as close as possible to V
sating noises and to improve surge immunity.
Power Supply
NTC
5D-9
Application
RT1
LCD Monitor
2KBP06M
BD101
1
275V
275V
150nF
150nF
C102
C101
LF101
30mH
R101
1M
2
1W
4
AC
AC
3
100 F
C103
400V
FUSE
250V
FPS™ Device
2A
F1
R108
FSFM300N
N.C
R102
75k
C105
33nF
100V
Figure 24. Demonstration Circuit of FSFM300N
R103
51k
1W
5
4
3
I
V
FB
LIM
FSFM300N
STR
GND
1
Drain
Input Voltage
V
CC
3.3nF
C104
630V
1N4745A
85-265V
2
ZD101
6,7,8
R105
100
0.5W
Range
100nF
C106
C107
47 F
AC
1N4007
50V
D101
AC
UF 4004
14
D102
input and 0.5W load)
Rated Output Power
1
2
3
4
5
EER3016
30W
4.7nF
C301
T1
FOD817C
Y2
CC
IC301
10
pin to avoid malfunction by abrupt pul-
6
7
6
MBRF1060
D202
2200 F
C203
10V
R201
1k
KA431
IC201
1.2k
R202
1000 F
C201
25V
(Maximum Current)
R203
18k
L201
L202
5 H
5 H
Output Voltage
1000 F
C204
10V
5.0V (2.0A)
14V (1.4A)
C205
47nF
1000 F
C202
25V
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R204
R205
8k
8k
14V, 1.4A
5V, 2A