VSK-S2-5U

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**date** 10/26/2015 **page** 1 of 5 

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

## **FEATURES** 

- up to 2 W continuous power 

- compact board mount design 

- universal input (85~305 Vac / 120~430 Vdc) 

- single output from 3.3~24 Vdc 

- over current and short circuit protection 

- UL/cUL and CE safety approvals 

- efficiency up to 78% 

|**MODEL**|**output**<br>**voltage**|**output**<br>**current**|**output**<br>**power**|**ripple**<br>**and noise1**|**efficiency**|
|---|---|---|---|---|---|
|||**max**|**max**|**max**|**typ**|
||(Vdc)|(mA)|(W)|(mVp-p)|(%)|
|VSK-S2-3R3U|3.3|600|2|200|65|
|VSK-S2-5U|5|400|2|200|70|
|VSK-S2-9U|9|222|2|200|72|
|VSK-S2-12U|12|167|2|200|76|
|VSK-S2-15U|15|133|2|200|76|
|VSK-S2-24U|24|83|2|200|78|



Notes: 1. At full load 20 MHz bandwidth oscilloscope, see Test Configuration section. 

## **PART NUMBER KEY** 

## **- - VSK S2 XX U** 

Base Number 

Output Voltage 

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## **INPUT** 

|**INPUT**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|voltage||85<br>120||305<br>430|Vac<br>Vdc|
|frequency||47||63|Hz|
|current|at 115 Vac<br>at 230 Vac|||55<br>31|mA<br>mA|
|inrush current|at 115 Vac<br>at 230 Vac||7<br>14||A<br>A|
|leakage current||||0.15|mA|
|no load power consumption||||0.2|W|
|**OUTPUT**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
||3.3 and 5 Vdc output models|||4,000|μF|
|maximum capacitive load|9 and 12 Vdc output models<br>15 Vdc output model|||2,200<br>1,000|μF<br>μF|
||24 Vdc output model|||680|μF|
|line regulation|at full load||±2||%|
|load regulation|at 10 ~ 100% load||±5||%|
|voltage accuracy|3.3 Vdc model<br>all other models||±6<br>±5||%<br>%|
|switching frequency||||100|kHz|
|**PROTECTIONS**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|over current protection|auto restart|110|||%|
|short circuit protection|continuous, auto restart|||||
|**SAFETY & COMPLIANCE**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|isolation voltage|input to output for 1 minute|3,000|||Vac|
|safety approvals|UL 60950-1|||||
|safety class|class II|||||
|conducted/radiated emissions|CISPR22/EN55022 Class B|||||
|ESD|IEC/EN61000-4-2 class B, contact ±4kV, air ±8kV|||||
|radiated immunity|IEC/EN61000-4-3 class A, 10V/m|||||
|EFT/burst|IEC/EN61000-4-4 class B, ±2kV (external circuit required, see fgure 3)|||||
|surge|IEC/EN61000-4-5 class B, ±2kV (external circuit required, see fgure 3)|||||
|conducted immunity|IEC/EN61000-4-6 class A, 10 Vr.m.s|||||
|PFM|IEC/EN61000-4-8 class A, 10 A/m|||||
|voltage dips & interruptions|IEC/EN61000-4-11 class B, 0%-70%|||||
|MTBF|as per MIL-HDBK-217F, 25°C|300,000|||hours|
|RoHS|2011/65/EU|||||
|**ENVIRONMENTAL**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|operating temperature|see derating curves|-25||70|°C|
|storage temperature||-25||85|°C|
|operating humidity|non-condensing|||90|%|
|storage humidity|non-condensing|||95|%|



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**date** 10/26/2015 **│ page** 3 of 5 

## **DERATING/EFFICIENCY CURVES** 

**==> picture [377 x 235] intentionally omitted <==**

**----- Start of picture text -----**<br>
output power vs. ambient temperature output power vs. input voltage<br> (100~305 Vac; 140~430 Vdc)  (25°C)<br>100 100<br>8060 P|Pamnna| || T | ENtT tT 8060 ax| | tt ti|<br>50<br>40 i  er N e 40 ee ee ee<br>20 e e 20 Pot EEE<br>PEP EE ee ee eePoE eeEEE ee<br>-25 -10 0 55 70 85 100 305<br>120 140 430<br>Ambient Temperature (°C) Input Voltage (Vac/Vdc)<br>efficiency vs. output power efficiency vs. input voltage<br>(Vin=230 Vac) (full load)<br>90  90<br>85<br>80  VSK-S2-12UVSK-S2-24U 85<br>75<br>VSK-S2-5U 80 VSK-S2-24U<br>70<br>VSK-S2-12U<br>65  75<br>60<br>70 VSK-S2-5U<br>55<br>50  65<br>10  20  30  40  50  60  70  80  90  100  85 120 220 240 264 305<br>Load (%) Input Voltage (Vac)<br>~~ ~~<br>Load (%)<br>Load (%)<br>~~ ~~<br>Efficiency (%) Efficiency (%)<br>**----- End of picture text -----**<br>


## **MECHANICAL** 

|**MECHANICAL**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|dimensions|33.70 x 22.20 x 18.00 (1.327 x 0.874 x 0.708 inch)||||mm|
|case material|UL94V-0|||||
|weight|||20||g|



## **MECHANICAL DRAWING** 

units: mm [inches] tolerance: ±0.50 [±0.020] 

pin section tolerance: ±0.10 mm [±0.004] 

**==> picture [502 x 248] intentionally omitted <==**

**----- Start of picture text -----**<br>
PIN CONNECTIONS RY<br>PIN FUNCTION ms<br>1 AC(N) oo—SF SXe)<br>2 AC(L)<br>3 -Vo<br>4 +Vo<br>== | 0. 60[0. 024] eg s<br>Front view<br>33. 70[1. 327] ∅1.10[0.43] 33. 70[1. 327]<br>NE<br>2 TNT 1 3<br>Ag: 4 ax2 Tee HE 4 ge<br>os Ns 2s HHHHH He©  we) Rs8s<br>1 3 PCEBE 2 CCEC Eee $86<br>— PEE e S<br>28. 00[1. 102] Nw0%fo)<br>N s 28. 00[1. 102]<br>Bottom view Recommended PCB Layout<br>Top View<br>**----- End of picture text -----**<br>


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## **TEST CONFIGURATION** 

**==> picture [540 x 139] intentionally omitted <==**

**----- Start of picture text -----**<br>
Copper sheet<br>FUSE<br>AC(L) AC(L) +Vo<br>Figure 1 AC/DC C 1 C 2 Load Connect<br>Oscillograph Probe<br>AC(N) AC(N) -Vo<br>12. 7m m Table 1<br>25. 4m m 25. 4m m<br>External components<br>C1 1μF ceramic<br>C2 10μF electrolytic<br>**----- End of picture text -----**<br>


## **TYPICAL APPLICATION CIRCUIT** 

**==> picture [415 x 91] intentionally omitted <==**

**----- Start of picture text -----**<br>
FUSE NTC C1 C2 TVS<br>AC (L) AC (L) +Vo<br>CX<br>Figure 2 M OV AC / DC +<br>RL<br>AC (N) AC (N)<br>-Vo<br>**----- End of picture text -----**<br>


## **Table 2** 

|**Table 2**|**Table 2**|**Table 2**|**Table 2**|**Table 2**|**Table 2**|**Table 2**|**Table 2**|**Table 2**|**Table 2**|**Table 2**|
|---|---|---|---|---|---|---|---|---|---|---|
||||||||||||
|Recommended external circuit components|||||||||||
|Model|FUSE|MOV|NTC|R1|CY3, CY4|CX|LCM|TVS1|C12|C23|
|VSK-S1-3R3U|1A/300V, slow blow|S14K350|10D-11|47Ω/3W|2.2nF/400V|0.4μF/305Vac|10 mH|SMBJ7.0A|1μF/50V|220μF|
|VSK-S1-5U|1A/300V, slow blow|S14K350|10D-11|47Ω/3W|2.2nF/400V|0.1μF/305Vac|10 mH|SMBJ7.0A|1μF/50V|220μF|
|VSK-S1-9U|1A/300V, slow blow|S14K350|10D-11|47Ω/3W|2.2nF/400V|0.1μF/305Vac|10 mH|SMBJ12A|1μF/50V|120μF|
|VSK-S1-12U|1A/300V, slow blow|S14K350|10D-11|47Ω/3W|2.2nF/400V|0.1μF/305Vac|10 mH|SMBJ20A|1μF/50V|120μF|
|VSK-S1-15U|1A/300V, slow blow|S14K350|10D-11|47Ω/3W|2.2nF/400V|0.1μF/305Vac|10 mH|SMBJ20A|1μF/50V|120μF|
|VSK-S1-24U|1A/300V, slow blow|S14K350|10D-11|47Ω/3W|2.2nF/400V|0.1μF/305Vac|10 mH|SMBJ30A|1μF/50V|68μF|



## **EMC RECOMMENDED CIRCUIT** 

**==> picture [455 x 93] intentionally omitted <==**

**----- Start of picture text -----**<br>
FUSE R1 C1 C2 TVS<br>AC(L) AC (L) +Vo<br>CY3<br>LCM<br>+<br>Figure 3 M OV CX AC / DC RL<br>CY4<br>AC(N) AC(N) -Vo<br>**----- End of picture text -----**<br>


Notes: 

1. See Table 2 for EMC components. 

2. TVS is a recommended component to protect post-circuits if converter fails. 

3. C1 is a ceramic capacitor used to filter high frequency noise. 

4. C2 is an electrolytic capacitor. We recommend using high frequency and low impedence electrolytic capacitors. For capacitance and current of capacitor please refer to the manufacture’s datasheet. Voltage derating of capacitor should be 80% or above. 

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

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**date** 10/26/2015 **│ page** 5 of 5 

## **REVISION HISTORY** 

|**rev.**|**description**|**date**|
|---|---|---|
|1.0|initial release|04/19/2012|
|1.01|updated features|06/04/2012|
|1.02|V-Infnitybrandingremoved|08/16/2012|
|1.03|updated deratingcurves and spec|11/12/2013|
|1.04|internal inductor & PCB structure changed|10/26/2015|



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

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

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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.