cui.com

date 12/08/2017

│ page 7 of 10

CUI Inc

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

1

+Vo

-Vo

10

12

AC(L)

AC(N)

C1

+

5

3

MO V1

7

AC-DC

C2

C3 TVSRL

L1

C4

L2

CY0

FUSE

NTC

+

+

PI filter

APPLICATION CIRCUIT

Figure 1

Table 1

EMC RECOMMENDED CIRCUIT

AC(N)

AC(L)

MOV2

LCM

CX

CY2

CY3

AC-DC

C1

+

5

FUSE

12

CY1

10

7

-Vo

+Vo

L1

C2

C3 TVSRL

C4

LDM

R2

+

+

1

3

R3

Recommended External Circuit Components

FUSE

1 A/300 V, slow fusing

MOV2

S14K350

LCM

3.50 mH

CX

0.1 µF/275 Vac

LDM

0.33 mH

CY1/CY2/

CY3

1 nF/400 Vac

R2/R3

33 Ω/3 W

Table 2

Figure 2

Recommended External Circuit Components

Vo

(Vdc)

MOV1

NTC

L2

CY0

TVS

C4

5

1A/300V S14K350 15D-5

1mH

4.7μF/450V 1nF/400Vac 100μF/16V 2.2μH

68μF/35V

SMBJ7.0A 0.1μF/50V

9

1A/300V S14K350 15D-5

1mH

4.7μF/450V 1nF/400Vac 150μF/35V 2.2μH

68μF/35V

SMBJ12A

0.1μF/50V

12

1A/300V S14K350 15D-5

1mH

4.7μF/450V 1nF/400Vac 100μF/35V 2.2μH

68μF/35V

SMBJ20A

0.1μF/50V

15

1A/300V S14K350 15D-5

1mH

4.7μF/450V 1nF/400Vac 100μF/35V 2.2μH

68μF/35V

SMBJ20A

0.1μF/50V

24

1A/300V S14K350 15D-5

1mH

4.7μF/450V 1nF/400Vac 100μF/35V 2.2μH

68μF/35V

SMBJ30A

0.1μF/50V

Note:

1. Required components.

2. For 5 Vdc outputs, C2 should be a solid-state capacitor.

Notes:

3. C1 is required for both AC and DC inputs.

4. It is required to add pi-type filter circuit (C2, C3, & L1) to the output. The capacitors are recommended to be high frequency and low impedance electrolytic capacitors.

For capacitance and rated ripple current of capacitors, refer to the datasheets provided by the manufacturers. Voltage derating of capacitors should be 80% or above.

5. C4 is a ceramic capacitor used to filter high frequency noise.

6. For current of L1 & L2 refer to the datasheets provided by the manufacturers. Current derating should be 80% or above.

7. TVS is a recommended component to protect post-circuits (if converter fails).

8. It is required to have a distance ≥6.4 mm for safety between external components in primary and secondary circuit.

9. It is recommended to add an insulation sheet between the bottom of the right-angle versions and the PCB when mounting.

Note:

Also refer to Table 1.

For more information, please visit the product page

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