MGJ6 SIP/DIP Series
5.7kVDC Isolated 6W Gate Drive SIP/DIP DC/DC Converters
KDC_MGJ6C-SCDC.B01 Page 12 of 16
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EMC FILTERING AND SPECTRA
FILTERING
MGJ6D05xxxxDC MGJ6D12xxxxDC
MGJ6D24xxxxDC MGJ6D05xxxxSC
0
10
20
30
40
50
60
70
80
90
100
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
0
10
20
30
40
50
60
70
80
90
100
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
The following filter circuit and filter table shows the input filters typically required to meet EN 55022 Curve B, Quasi-Peak EMC limit, as shown in the following
plots. The following plots show positive and negative quasi peak and CISPR22 Average Limit B (purple line) and Quasi Peak Limit B (pink line) adherence limits.
C1, C2 & C3 Polyester or ceramic capacitor
C4 Electrolytic capacitor (note R1 could be omitted if C4 has ESR >= R1)
C1
L1
C2
C3
DC
DC
C4
R1
L2
0
10
20
30
40
50
60
70
80
90
100
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Fre
uenc
Hz
0
10
20
30
40
50
60
70
80
90
100
1.00E+05 1.00E+06 1.00E+07 1.00E+08
dBuV
Frequency (Hz)
TO MEET CURVE B
Part Number C1 L1&2 Through Hole C2&3 R1 C4
MGJ6D05XXXXXC
3.3uF 10uH 47100SC 10nF 500M
470uF
MGJ6D05XXXXXC 3.3uF 10uH 47100SC 10nF 500M
470uF
MGJ6D05XXXXXC
3.3uF 10uH 47100SC 10nF 500M
470uF
