cui.com

date 01/19/2022

│ page 6 of 8

CUI Inc

│ SERIES: PSK-3D │ DESCRIPTION: AC-DC POWER SUPPLY

APPLICATION DESIGN REFERENCE

Part No.

C1(µF)

C2(µF)

FUSE

R1

TVS

MOV

PSK-3D-3

1

150

1A/300V,

slow-blow,

required

12Ω/3W

SMBJ7A

S10K350

PSK-3D-5

150

SMBJ7A

PSK-3D-9

120

SMBJ12A

PSK-3D-12

120

SMBJ20A

PSK-3D-15

120

SMBJ20A

PSK-3D-24

68

SMBJ30A

Components

Recommended Value

MOV

S14K350

R1

33Ω/3W

FUSE

2A/300V, slow-blow, required

EMC RECOMMENDED CIRCUIT

Figure 1

Table 1

Figure 2

Table 2

Output Filtering Components:

An electrolytic capacitor with high frequency operation, low ESR, and at least 20% margin on rated output voltage is recommended for

C2. C1 should be a ceramic capacitor and the TVS will help protect downstream electronics in the unlikely event of converter failure.

Note: EMC application circuit with higher requirements.

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