RECOMMENDED CIRCUIT
‧Recommended filter for EN55022 Class B compliance
L1
+
Vin +
Vo 2
Vo 1
C1
C2
FDD12T
com
Vin -
Vo3
-
C3
‧Recommended EN 55022 Class B filter circuit layout.
FDD12 SERIES
TRIPLE OUTPUT
‧The commponents used in the above figure, together with the
manufacturer part numbers for these components, are as follows.
C1
C2
C3
FDD12-XXXXT4 3.3μF / 50V 3.3μF / 50V InF / 2KV
MLCC
MLCC
MLCC
FDD12-XXXXT5 3.3μF / 100V 3.3μF / 100V InF / 2KV
MLCC
MLCC
MLCC
L1
0.5mH
Common
Choke
0.5mH
Common
Choke
T
DERATING AND EFFICIENCY CURVE
Temperature derating curve
100
NATURAL
CONVECTION
COOLING
0
-25
71
100
Ambient Temperature [ oC ]
84
83
82
81
80
79
78
77
76
10
Efficiency Vs Input Voltage
FDD12-0515T4
Io : Full Load
12 15 18 21 24 27 30 33 36
Input Voltage (V)
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Efficiency Vs Output Load
FDD12-0515T4
85
80
75
70
Vi : 24VDC
65
60
10 20 30 40 50 60 70 80 90 100
Output Load (%)
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