date

08/16/2012 │ page 4 of 4

CUI Inc

│ SERIES: VSK-S2 │ DESCRIPTION: AC-DC POWER SUPPLY

CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website.

CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is

assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use.

CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical

component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to

affect its safety or effectiveness.

Headquarters

20050 SW 112th Ave.

Tualatin, OR 97062

800.275.4899

Fax 503.612.2383

cui.com

techsupport@cui.com

TYPICAL APPLICATION CIRCUIT

rev.

description

date

1.0

initial release

04/19/2012

1.01

updated features

06/04/2012

1.02

V-Infinity branding removed

08/16/2012

The revision history provided is for informational purposes only and is believed to be accurate.

REVISION HISTORY

NF

C1

C5

C3

MO V

L

N

NT C

L

N

+Vo

-Vo

+

C2

RL

TVS

C4

FUSE

EXTERNAL CAPACITORS TYPICAL VALUE (Unit: μF)

MODEL

C1

C2

TVS

VSK-S2-3R3U

220 μF

0.1 μF/50 V

P4KE6.8A

VSK-S2-5U

220 μF

0.1 μF/50 V

P4KE6.8A

VSK-S2-9U

120 μF

0.1 μF/50 V

P4KE12A

VSK-S2-12U

120 μF

0.1 μF/50 V

P4KE20A

VSK-S2-15U

120 μF

0.1 μF/50 V

P4KE20A

VSK-S2-24U

68 μF

0.1 μF/50 V

P4KE30A

Notes: 1. Output filtering capacitor C1 is an electrolytic capacitor. It is recommended to use high frequency

and low impedance electrolytic capacitors. For capacitance and current of capacitor please refer

to manufacture’s datasheet. Voltage derating of capacitor should be 80% or above. C2 is ceramic

capacitor, it is used to filter high frequency noise. TVS is a recommended component to protect

post-circuits (if converter fails).

2. It is recommended to use a 2A/250V slow blow FUSE.

3. MOV is required to protect the device under surge. Varistor model: 561KD14

C3,C4: Y capacitor, recommended parameter 2,200~4,700pF/400V;

C5: X capacitor, recommended parameter 0.1~0.33μF/300V;

NF: common model choke, recommended inductance is about 15mH~30mH.