VMS-20-24

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**date** 07/22/2013 **page** 1 of 4 

## **SERIES:** VMS-20 **DESCRIPTION:** AC-DC POWER SUPPLY **│** 

## **FEATURES** 

- up to 21.6 W continuous power 

- compact size 

- universal input (90~264 Vac) 

- single output from 3.3~24 V 

- no load power < 0.3W 

- over voltage and short circuit protections 

- full medical safety approvals 

- efficiency up to 85% 

## RoHS > cSAdus CE 

|RoHS<br>uma<br>®<br>> cSAdus|(A__)) tecevso~~r~~<br> CE|||Y ,<br>“||
|---|---|---|---|---|---|
|**MODEL**|**output**<br>**voltage**|**output**<br>**current**|**output**<br>**power**|**ripple and**<br>**noise1**|**efficiency**|
|||**max**|**max**|**max**|**typ**|
||(Vdc)|(A)|(W)|(mVp-p)|(%)|
|VMS-20-3.3|3.3|4.0|13.2|50|75|
|VMS-20-5|5|4.0|20.0|50|80|
|VMS-20-9|9|2.3|20.7|90|81|
|VMS-20-12|12|1.7|20.4|100|83|
|VMS-20-15|15|1.4|21.0|100|84|
|VMS-20-24|24|0.9|21.6|100|85|



Notes: 1. Measured at 20MHz, with 0.1uF ceramic and 10uF electrolytic capacitors 

## **PART NUMBER KEY** 

## **- VMS 20 - XX** 

Base Number 

Output Voltage 

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**date** 07/22/2013 **│ page** 2 of 4 

## **INPUT** 

|**INPUT**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|voltage||90||264|Vac|
|frequency||47||63|Hz|
|current||||0.5|A|
|inrush current|at 230 Vac, cold start at 25 °C|||40|A|
|**OUTPUT**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|line regulation|low line to high line, full load|||±0.5|%|
|load regulation|10% to 100% full load|||±1|%|
|hold-up time|115 Vac||10||ms|
|switching frequency|||100||KHz|
|**PROTECTIONS**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|over voltage protection||115||140|%|
|short circuit protection|continuous|||||
|**SAFETY & COMPLIANCE**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|isolation voltage|input to output|5,656|||Vdc|
|safety approvals|UL 60601-1, IEC 60601-1, EN 60601-1|||||
|EMI/EMC|EN 60601-1/EN 61204-3/EN 55022/CISPR Class|B, EN 55024||||
|leakage current||||0.1|mA|
|RoHS compliant|yes|||||
|MTBF|MIL-HDBK-217F, GB|400,000|||hrs|
|**ENVIRONMENTAL**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|operating temperature|see derating curve|-25||70|°C|
|storage temperature||-40||85|°C|
|operating humidity|non-condensing|||93|%|



## **DERATING CURVE** 

output power vs. ambient temperature 

**==> picture [374 x 147] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>80<br>(Natural Convection)<br>60<br>40<br>20<br>-30 -20 0 10 20 30 40 50 60 70<br>Ambient Temperature (°C)<br>Load (%)<br>**----- End of picture text -----**<br>


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**CUI Inc │ SERIES:** VMS-20 **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 07/22/2013 **│ page** 3 of 4 

## **MECHANICAL** 

|**MECHANICAL**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|dimensions|60.5 x 40.6 x 20.4 (2.382 x 1.598 x 0.803 inch)||||mm|
|weight||||50|g|
|cooling method|free air convection (see derating curve)|||||



## **MECHANICAL DRAWING** 

units: mm[inch] tolerance: mm: X.X = ±0.5 ; X.XX = ±0.25 inch: X.XX = ±0.02 ; X.XXX = ±0.01 

**==> picture [546 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
60.5 2.38<br>54.00 2.126<br>-Vo<br>ACN<br>40.6 1.60<br>30.32 1.194<br>+Vo 20.32 0.800<br>10.32 0.406<br>ACL<br>3.06 0.120 2.82 0.111<br>Top View Bottom View<br>**----- End of picture text -----**<br>


**==> picture [264 x 99] intentionally omitted <==**

**----- Start of picture text -----**<br>
20.40 0.803<br>17.00 0.669<br>MAX<br>2.00 0.079<br>MAX 1.80 0.071 3.40 0.134<br>3.80 0.150<br>1.00 0.039<br>Front View<br>**----- End of picture text -----**<br>


Note: All specifications measured at 25°C, 115/230Vac input voltage, and full load unless otherwise noted. 

**cui** .com 

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**CUI Inc │ SERIES:** VMS-20 **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 07/22/2013 **│ page** 4 of 4 

## **REVISION HISTORY** 

|**rev.**|**description**|**date**|
|---|---|---|
|1.0|initial release|10/26/2011|
|1.01|V-Infnitybrandingremoved|08/21/2012|
|1.02|updated spec|07/22/2013|



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

**Headquarters** 20050 SW 112th Ave. Tualatin, OR 97062 **800.275.4899** 

Fax 503.612.2383 **cui** .com techsupport@cui.com 

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.