cui.com

date 10/18/2016

│ page 8 of 9

CUI Inc

│ SERIES: PBO-3 │ DESCRIPTION: AC-DC POWER SUPPLY

APPLICATION CIRCUIT

Figure 1

Table 1

1

+Vo

-Vo

10

12

AC(L)

AC(N)

C1

+

5

3

MOV1

7

ACDC

C2

C3 TVSRL

+

L1

+

C4

L2

CY0

FUSE

NTC

2

EMC RECOMMENDED CIRCUIT

AC(N)

AC(L)

AC(L)

MO V2

LCM

CX

CY1

CY2

ACDC

C1

+

5

FUSE

12

CY0

10

7

AC(N)

-Vo

+Vo

L1

+

+

C2

C3

TVSRL

C4

LDM

NTC

RecommendedExternalCircuitComponents

FUSE

1A/250V,slowfusing

MOV2

S14K320

LCM

3.5mH

CX

0.1µF/275Vac

LDM

0.33mH

CY1,CY2

1nF/400Vac

NTC

13D-5

C1

10μF/400V

CY0

1nF/400Vac

Table 2

Figure 2

RecommendedExternalCircuitComponents

Vo

(Vdc)

MOV1

NTC

L2

CY0

TVS

C4

3.3

1A/250V S14K320 13D-5

4.7mH 10μF/400V 1nF/400Vac 330μF/25V 2.2μH 120μF/25V SMBJ7.0A 0.1μF/50V

5

1A/250V S14K320 13D-5

4.7mH 10μF/400V 1nF/400Vac 330μF/25V 2.2μH

68μF/35V

SMBJ7.0A 0.1μF/50V

9

1A/250V S14K320 13D-5

4.7mH 10μF/400V 1nF/400Vac 330μF/25V 2.2μH

68μF/35V

SMBJ12A

0.1μF/50V

12

1A/250V S14K320 13D-5

4.7mH 10μF/400V 1nF/400Vac 150μF/35V 2.2μH

68μF/35V

SMBJ20A

0.1μF/50V

15

1A/250V S14K320 13D-5

4.7mH 10μF/400V 1nF/400Vac 150μF/35V 2.2μH

68μF/35V

SMBJ20A

0.1μF/50V

24

1A/250V S14K320 13D-5

4.7mH 10μF/400V 1nF/400Vac 100μF/35V 2.2μH

68μF/35V

SMBJ30A

0.1μF/50V

Note:

1.Requiredcomponents.

2.C2,C3,&L1formpi-typefiltercircuit.

Notes:

1.C1isrequiredforbothACandDCinputs.Forinputvoltagesgreaterthan370Vdc,therecommendedvalueis10µF/450V.

2.Itisrequiredtoaddpi-typefiltercircuit(C2,C3,&L1)totheoutput.Thecapacitorsarerecommendedtobehighfrequencyandlowimpedanceelectrolyticcapacitors.

Forcapacitanceandratedripplecurrentofcapacitors,refertothedatasheetsprovidedbythemanufacturers.Voltagederatingofcapacitorsshouldbe80%orabove.

3.Whenoperatinginthe-40~-20°Cand55~85°Ctemperatureranges,the3.3and5Vdcoutputmodelsshouldusea270µF/16Vsolid-statecapacitorforC2.

4.C4isaceramiccapacitorusedtofilterhighfrequencynoise.

5.ForcurrentofL1&L2refertothedatasheetsprovidedbythemanufacturers.Currentderatingshouldbe80%orabove.

6.TVSisarecommendedcomponenttoprotectpost-circuits(ifconverterfails).

7.Itisrequiredtohaveadistance≥6.4mmforsafetybetweenexternalcomponentsinprimaryandsecondarycircuit.

8.Itisrecommendedtoaddaninsulationsheetbetweenthebottomoftheright-angleversionsandthePCBwhenmounting.

Note:

AlsorefertoTable1.

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