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date 02/02/2018

│ page 6 of 7

CUI Inc

│ SERIES: PBK-1 │ DESCRIPTION: AC-DC POWER SUPPLY

EMC RECOMMENDED CIRCUIT

Recommended External Circuit Components

MOV2

S14K350

CY1, CY2

1nF/400Vac

CX

0.1μF/275Vac

LCM

3.5mH

LDM

5mH

FUSE

1A/250V, slow blow

Figure 3

Table 3

AC (N )

AC (L)

MO V2

LC M

CX

CY1

CY2

AC -DC

C1 +

FUSE

CY0

-Vo

+Vo

L1

C2

C3

TV SRL

C4

LD M

+V in(L)

+V (c ap )

-V (c ap )

-V in(N )

+

+

Notes:

1. C1 and C3 are electrolytic capacitors. They are required for both AC input and DC input.

2.ForACinput,C1isusedasafiltercapacitor.TherecommendedC1valueis10μF/400V.

3.ForDCinput,C1isusedasanEMCfiltercapacitor.TherecommendedC1valueis10μF/400V.Whentheinputvoltageisabove370VDC,werecommenda10μF/450Vcapacitor.

4.C2andC3areoutputfilercapacitors,werecommendhighfrequencyandlowimpedanceelectrolyticcapacitors.Forcapacitanceandratedripplecurrentofcapacitorsreferto

the datasheets provided by the manufacturers, voltage derating of capacitors should be 80% or above.

5.C4isaceramiccapacitorwhichisusedtofilterhighfrequencynoise.C2,C3andL1formapi-typefiltercircuit.ForcurrentofL1andL2refertothedatasheetsprovidedby

the manufacturers, current derating should be 80% or above. TVS is a recommended component to protect post-circuits (if converter fails). We recommend using a 5D-9

external input NTC.

6.ForstandardEMCrequirements,pleaserefertofigure2.IfahigherEMCisrequired,pleaserefertofigure3.

7.AllspecificationsmeasuredatTa=25C,humidity<75%,115Vac&230Vacinputvoltage,andratedoutputload,unlessotherwisespecified.

Note:

Also refer to Table 2.

TYPICAL APPLICATION CIRCUIT

-V in (N )

+Vo

-Vo

AC (L)

AC (N )

C1

+

+V (c ap )

MO V1

AC -D C

C2

C3 TV S

RL

L1

C4

L2

CY 0

+V in (L)

-V (c ap )

+

+

Figure 2

Table 2

Recommended External Circuit Components

V

OUT

(Vdc)

L2

C4

CY0

TVS

NTC

MOV1

5

10μF/400V

4.7mH

150μF/35V 2.2μH 68μF/35V 0.1μF/50V 1nF/400Vac 1A/250V SMBJ7.0A 5D-9

S14K350

9

10μF/400V

4.7mH

150μF/35V 2.2μH 68μF/35V 0.1μF/50V 1nF/400Vac 1A/250V

SMBJ12A

5D-9

S14K350

12

10μF/400V

4.7mH

100μF/35V 2.2μH 68μF/35V 0.1μF/50V 1nF/400Vac 1A/250V

SMBJ20A

5D-9

S14K350

15

10μF/400V

4.7mH

100μF/35V 2.2μH 68μF/35V 0.1μF/50V 1nF/400Vac 1A/250V

SMBJ20A

5D-9

S14K350

24

10μF/400V

4.7mH

100μF/35V 2.2μH 68μF/35V 0.1μF/50V 1nF/400Vac 1A/250V

SMBJ30A

5D-9

S14K350

Note:

1. Required components.

2.When5Vdcmodelisoperatinginthe-25~0Cor55~85Crange,C2needstobea270μF/16Vsolidcapacitor.

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