FDC20-48S05
Efficiency VS Input Voltage
EFFICIENCY(%)
85%
83%
81%
79%
77%
75%
36
40
44
48
52
56
60
64
68
72
95
90
85
80
75
70
65
60
55
50
45
FDC20-48S05
Efficiency VS Output Load
EFFICIENCY(%)
INPUT VOLTAGE (V)
10
20
30
40
50
60
70
80
90
100
OUTPUT LOAD (% of Full Load)
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
follows:
1. All dimensions in Inches (mm)
Tolerance: X.XX±0.02 (X.X±0.5)
X.XXX±0.01 (X.XX±0.25)
2. Pin pitch tolerance
±0.01(0.25)
3. Pin dimension tolerance
±0.004
(0.1)
PIN CONNECTION
PIN
1
2
4
5
6
7
8
SINGLE
+ INPUT
- INPUT
CTRL
NO PIN
+ OUTPUT
- OUTPUT
TRIM
DUAL
+ INPUT
- INPUT
CTRL
+ OUTPUT
COMMON
- OUTPUT
TRIM
TRIPLE
+ INPUT
- INPUT
CTRL
+ AUXILIARY
+3.3V / +5V
COMMON
- AUXILIARY
L1
450μH
4.7μF/50V
1000pF/2KV 1000pF/2KV Common
FDC20-12xxx
N/A
1812 MLCC
MLCC
MLCC
Choke
PMT-048
450μH
4.7μF/50V
1000pF/2KV 1000pF/2KV Common
FDC20-24xxx
N/A
1812 MLCC
MLCC
MLCC
Choke
PMT-048
450μH
2.2μF/100V 2.2μF/100V 1000pF/2KV 1000pF/2KV Common
FDC20-48xxx
1812 MLCC 1812 MLCC
MLCC
MLCC
Choke
PMT-048
C1
C2
C3
C4
EXTERNAL OUTPUT TRIMMING
Output can be externally trimmed by
using the method shown below.
( ) for dual output trim
TRIM UP
TRIM DOWN
7(7)
8(8)
R
U
8(8)
6(5)
R
D
Recommended EN55022 Class B Filter Circuit Layout
Page 3 of 3
Issued Date：2008/05/21
P-DUKE [ POWER MATE TECHNOLOGY CO., LTD ]
