CRE1 Series

Isolated 1W Single Output Isolated DC-DC Converters

KDC_CRE1.E01 Page 10 of 17

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EMC FILTERING AND SPECTRA

FILTERING

The following table shows the additional input capacitor and input inductor 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 (pink line) and Quasi Peak Limit B (green line) adherence limits.The below

values are for guidance only and should be evaluated in the application circuit. For the CRE1S0505MEC an input inductor is not required.

Inductor

Capacitor

Part Number

L, μH

SMD

Through Hole

C, μF

Rated

Voltage

Recommended Part

Number

CRE1S0505DC

4.7

82472C

13R472C

4.7

16VDC

GRM188Z71C475ME21

CRE1S0505SC

4.7

82472C

13R472C

4.7

16VDC

GRM188Z71C475ME21

CRE1S0515SC

4.7

82472C

13R472C

4.7

16VDC

GRM188Z71C475ME21

CRE1S1205SC

10

82103C

13R103C

1

50VDC

GRM21BR71H105KA12

CRE1S1212SC

10

82103C

13R103C

1

50VDC

GRM21BR71H105KA12

CRE1S2405SC

22

82223C

13R223C

10

50VDC

GRM32ER71H106MA12

CRE1S2412SC

22

82223C

13R223C

10

50VDC

GRM32ER71H106MA12

CRE1S0305S3C

10

82103C

13R103C

1

50VDC

GRM188R71C105MA12

CRE1S0505S3C

10

82103C

13R103C

1

50VDC

GRM188R71C105MA12

CRE1S0505MC

10

82103C

13R103C

4.7

16VDC

GRM188Z71C475ME21

CRE1S0505MEC

NR

NR

NR

22

10VDC

GRM32ER71A226ME20

CRE1S0505XC

CRE1S0515SC

CRE1S1205SC

CRE1S1212SC

DC

DC

C

L

0

10

20

30

40

50

60

70

80

1.00E+05

1.00E+06

1.00E+07

1.00E+08

Frequency (Hz)

0

10

20

30

40

50

60

70

80

1.00E+05

1.00E+06

1.00E+07

1.00E+08

Frequency (Hz)

0

10

20

30

40

50

60

70

80

1.00E+05

1.00E+06

1.00E+07

1.00E+08

Frequency (Hz)

0

10

20

30

40

50

60

70

80

1.00E+05

1.00E+06

1.00E+07

1.00E+08

Frequency (Hz)

NR - Not required