OUTPUT POWER (%)
FEC40-48S05 Derating Curve
120
100
80
60
40
20
0
-40
-20
0
20
40
60
59.1
80
100
120
AMBIENT TEMPERATURE(℃
)
OUTPUT POWER(%)
120
100
80
60
40
20
0
FEC40-48S05 Derating Curve
With Heatsink
(Note
10 )
(Note
13)
Recommended Filter for EN55022 Class B Compliance
The components used in the above figure, together with the
manufacturers’ part numbers for these components, are as
-20
0
20
40
60
66.2
80
100
120
-40
follows:
L1
450μH
4.7μF/50V
4.7μF/50V
1000pF/2KV Common
N/A
N/A
1812 MLCC
1812 MLCC
MLCC
Choke
PMT-048
450μH
1000pF/2KV Common
6.8μF/50V
6.8μF/50V
N/A
N/A
1812 MLCC
1812 MLCC
MLCC
Choke
PMT-048
830μH
2.2μF/100V 2.2μF/100V 2.2μF/100V 2.2μF/100V 1000pF/2KV Common
1812 MLCC 1812 MLCC 1812 MLCC 1812 MLCC
MLCC
Choke
PMT-053
C1
C2
C3
C4
C5 & C6
AMBIENT TEMPERATURE(℃)
FEC40-
12xxx
FEC40-48S05
Efficiency VS Input Voltage
91%
89%
87%
85%
83%
81%
79%
77%
75%
FEC40-
24xxx
FEC40-
48xxx
EFFICIENCY(%)
36
40
44
48
52
56
60
64
68
72
INPUT VOLTAGE (V)
95
90
85
80
75
70
65
60
55
50
45
FEC40-48S05
Efficiency VS Output Load
EFFICIENCY(%)
10
20
30
40
50
60
70
80
90
100
OUTPUT LOAD (% of Full Load)
Recommended EN55022 Class B Filter Circuit Layout
Page 3 of 4
Issued Date：2008/06/12
P-DUKE [ POWER MATE TECHNOLOGY CO., LTD ]
