VSK-S3-12U

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**date** 03/31/2014 **page** 1 of 5 

## **SERIES:** VSK-S3 **DESCRIPTION:** AC-DC POWER SUPPLY **│** 

## **FEATURES** 

- up to 3 W continuous power 

- compact board mount design 

- universal input (85~264 Vac / 110~370 Vdc) 

- single output from 3.3~24 V 

- over voltage, over temperature, and short circuit protections 

- UL/cUL safety approvals 

- efficiency up to 78% 

|**MODEL**|**output**<br>**voltage**|**output**<br>**current**|**output**<br>**power**|**ripple**<br>**and noise1**|**efficiency**|
|---|---|---|---|---|---|
|||**max**|**max**|**typ**|**typ**|
||**(Vdc)**|**(A)**|**(W)**|**(mVp-p)**|**(%)**|
|VSK-S3-3R3U|3.3|0.7|2.3|30|63|
|VSK-S3-5U|5|0.6|3|30|72|
|VSK-S3-9U|9|0.33|3|30|74|
|VSK-S3-12U|12|0.25|3|30|76|
|VSK-S3-15U|15|0.2|3|30|76|
|VSK-S3-24U|24|0.125|3|30|78|



Notes: 1. Ripple and noise measured at 20 MHz bandwidth 

## **PART NUMBER KEY** 

## **VSK-S3 - XXU** 

Base Number 

Output Voltage 

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**date** 03/31/2014 **│ page** 2 of 5 

## **INPUT** 

|**INPUT**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|voltage||85<br>110||264<br>370|Vac<br>Vdc|
|frequency||47||440|Hz|
|current|at 110 Vac<br>at 230 Vac||65<br>30||mA<br>mA|
|inrush current|at 110 Vac<br>at 230 Vac||10<br>20||A<br>A|
|external input fuse<br>(recommended)|slow blow, 250 V||0.5||A|
|**OUTPUT**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|line regulation|||±0.5||%|
|load regulation|10 ~ 100%||±1||%|
|temperature coeffcient|||0.02||%/°C|
|hold-up time|at 230 Vac||50||ms|
|voltage accuracy|3.3 V model<br>all other models||±3<br>±2||%<br>%|
|switching frequency|||100||kHz|
|**PROTECTIONS**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|over voltage protection|chip lock up|||||
|short circuit protection|auto recovery with no damage from a short on any output|||||
|over temperature protection||||150|°C|
|**SAFETY & COMPLIANCE**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|isolation voltage|primary to secondary (for 1 minute)|3,000|||Vac|
|safety approvals|UL 60950-1|||||
|safety class|class II|||||
|EMI/EMC|EN 55022 (level A), IEC/EN 61000-4-2 (level 4, 8kV/15kV), IEC/EN<br>(level 3, 2kV), IEC/EN 61000-4-5 (level 3, 1kV/2kV)||61000-4-3,|IEC/EN|61000-4-4|
|MTBF|25°C|300,000|||hrs|
|RoHS|2011/65/EU|||||



## **ENVIRONMENTAL** 

|**ENVIRONMENTAL**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|operating temperature||-25||70|°C|
|storage temperature||-40||105|°C|
|case temperature||||95|°C|
|operating humidity|non-condensing|||95|%|



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**date** 03/31/2014 **│ page** 3 of 5 

## **DERATING CURVES** 

## 1. output power vs. ambient temperature 

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**----- Start of picture text -----**<br>
100<br>80<br>60<br>50<br>40<br>20<br>-40       -30 -25 -20 -10 0 10 50 60 70<br>Ambient Temperature (°C)<br>≈<br>Load (%)<br>≈<br>**----- End of picture text -----**<br>


## 2. output power vs. input voltage 

**==> picture [172 x 90] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>80<br>60<br>50<br>40<br>20<br>             70        85 110 125 210 225 240 264<br>Input Voltage (Vac)<br>≈<br>Load (%)<br>≈<br>**----- End of picture text -----**<br>


## **MECHANICAL** 

|**MECHANICAL**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|dimensions|1.457 x 0.908 x 0.591 (37.0 x 23.0 x 15.0 mm)||||inch|
|case material|UL94V-0|||||
|weight|||25||g|



## **MECHANICAL DRAWING** 

units: mm [inches] tolerance: ±0.5 [±0.02] pin section tolerance: ±0.10 [±0.004] 

|||
|---|---|
|**PIN CONNECTIONS**||
|PIN|FUNCTION|
|1|L|
|3|N|
|13|N/C|
|14|0V|
|16|+Vo|
|22|+Vin(DC)|
|26|-Vin(DC)|
|||



**==> picture [513 x 287] intentionally omitted <==**

**----- Start of picture text -----**<br>
37.00 1.457 1 L<br>3 N<br>13 N/C<br>14 0V<br>15.00 0.591<br>16 +Vo<br>22 +Vin(DC)<br>26 -Vin(DC)<br>4.10 0.161 0.80 0.031<br>(TYP) (7 PLCS)<br>3.26 0.128 2.61 0.103<br>8.34 0.328 (2 PLCS) (TYP) 2.54<br>1 3 13<br>1.2 0.047 26 22 16 14<br>(7 PLCS)<br>23.00 0.906 17.78 0.700<br>26 22 16 14<br>1 3 13<br>3.26 0.128 5.08 0.200<br>(2 PLCS) BOTTOM VIEW (TYP)<br>RECOMMENDED FOOTPRINT<br>13.42 0.528 TOP VIEW<br>**----- End of picture text -----**<br>


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**date** 03/31/2014 **│ page** 4 of 5 

## **TYPICAL APPLICATION CIRCUIT** 

**==> picture [562 x 79] intentionally omitted <==**

**----- Start of picture text -----**<br>
* FUS E * NT C C 1 C 2 Tv s *F USE *NT C C1 C2 Tvs<br>L L +V0 L L +V0<br>C7<br>MOV + C 3 22 + R L C 6 NF MOV C3+ 22 + RL<br>26 C8 26<br>- V0<br>-V0<br>N N N N<br>Figure1<br>**----- End of picture text -----**<br>


Figure 2 VSK-S3 EMC Filtering Circuit 

||||||
|---|---|---|---|---|
|**EXTERNAL CAPACITORS TYPICAL VALUE(Unit:µF)**|||||
|MODEL|C1|C2|C3|TVS|
|VSK-S3-3R3U|150|0.1|4.7/400V|P4KE6.8A|
|VSK-S3-5U|150|0.1|4.7/400V|P4KE6.8A|
|VSK-S3-9U|150|0.1|4.7/400V|P4KE12A|
|VSK-S3-12U|150|0.1|4.7/400V|P4KE20A|
|VSK-S3-15U|150|0.1|4.7/400V|P4KE20A|
|VSK-S3-24U|150|0.1|4.7/400V|P4KE30A|



- Notes: 1. Output filtering capacitors C1, C3 is electrolytic capacitors, 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 apacitor should be 80% or above. C2, C4 is ceramic capacitors , it is used to filter high frequency noise. TVS is a recommended component to protect post-circuits (when converter fails). 

2. MOV is required for VSK-S3 models. Model: 471KD05, it is used to protect the device under surge. 

3. It is recommended to connect FUSE, the parameter is 0.5A/250V slow blow. External input NTC is recommended to use D -14 or 10Ω/2W wire-round resistor. 

4. If EMC performance is required, recommended to add “EMC filter” at the input end(see figure 2) C6:X capacitor, recommended parameter 0.1uF/275V; C7,C8:Y capacitor, recommended parameter 220pF/275V; NF: common model choke, recommended inductance is about 10mH-30mH. 

5. Terminals 22 and 26 are internal rectification and filtering terminals. To protect the models further, it is recommended to connect an electrolytic capacitor C3 (it is recommended to be 4.7uF/400V). If operation voltage of the module is between 160~264VAC, C3 can be removed. 

1. All specifications measured at Ta=25°C, humidity <75%, rated input voltage, and rated output load, unless otherwise specified. 

Note: 

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**date** 03/31/2014 **│ page** 5 of 5 

## **REVISION HISTORY** 

|**rev.**|**description**|**date**|
|---|---|---|
|1.0|initial release|02/27/2009|
|1.01|new template applied|04/10/2012|
|1.02|V-Infnitybrandingremoved|08/15/2012|
|1.03|updated spec|03/31/2014|



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

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

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