MGJ3 Series

5.2kVDC Isolated 3W Gate Drive SM DC/DC Converters

KDC_MGJ3C.E01 Page 8 of 10

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EMC FILTERING AND SPECTRA

FILTERING

TO MEET CURVE B

Part Number

C1

L1

L2

C2

C3

R1

C4

MGJ3T05150505MC 1.5µF

476R8SC

10nF

10nF

MGJ3T12150505MC 1.5µF

476R8SC

10nF

10nF

MGJ3T24150505MC 1.5µF

476R8SC

10nF

10nF

MGJ3T05150505MC

MGJ3T12150505MC

MGJ3T24150505MC

0

10

20

30

40

50

60

70

80

90

100

1.00E+05

1.00E+06

1.00E+07

1.00E+08

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

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

Frequency (Hz)

The following filter circuit and filter table shows the input filters typically required to meet EN55022 Quasi-PeakCurve A or B.

C1

L1

C2

C3

DC

DC

C4

R1

L2

C1, C2 & C3 Polyester or ceramic capacitor

C4

Electrolytic capacitor (note R1 could be omitted if C4 has ESR >= R1)