PSK-20F-48

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**date** 12/15/2023 **page** 1 of 7 

## **SERIES:** PSK-20F **DESCRIPTION:** INTERNAL AC-DC POWER SUPPLY **│** 

## **FEATURES** 

- up to 20 W continuous output power 

- universal input (85~305 Vac, 100~430 Vdc) 

- -40~85°C operating range 

- output short circuit/over voltage/current protection 

- 4,200 Vac input/output isolation voltage 

- OVC III (meets EN 62477-1) 

- CISPR32/EN55032 Class B 

- UL/EN/IEC 62368-1 certified 

- designed to meet IEC/EN 60335 

|folsWALus|C|€ca|€ca|||||
|---|---|---|---|---|---|---|---|
|**MODEL**<br>fols WALus|C|**output**<br>**voltage**<br> €ca||**output**<br>**current**|**output**<br>**power**|**ripple**<br>**and noise1**|**efficiency2**|
|||||**max**|**max**|**max**|**typ**|
||||(Vdc)|(A)|(W)|(mVp-p)|**(%)**|
|PSK-20F-3|||3.3|4.00|13.2|150|83|
|PSK-20F-5|||5|4.00|20.0|150|86|
|PSK-20F-9|||9|2.22|20.0|150|86|
|PSK-20F-12|||12|1.67|20.0|150|87|
|PSK-20F-15|||15|1.33|20.0|150|88|
|PSK-20F-24|||24|0.83|20.0|150|87|
|PSK-20F-48|||48|0.41|20.0|250|89|



Notes:   1. At full load, nominal input, 20 MHz bandwidth oscilloscope, with 1 µF ceramic and 10 µF electrolytic capacitors on the output. 

2. At 230 Vac input. 

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

## **PART NUMBER KEY** 

## **- - PSK 20F XX** 

Base Number 

Output Voltage 

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**date** 12/15/2023 **│ page** 2 of 7 

|**INPUT**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|voltage|ac input<br>dc input|85<br>100||305<br>430|Vac<br>Vdc|
|frequency||47||63|Hz|
|current|at 115 Vac<br>at 230 Vac|||0.5<br>0.3|A<br>A|
|inrush current|at 115 Vac<br>at 230 Vac||20<br>40||A<br>A|
|leakage current|at 277 Vac/50 Hz|||0.1|mA|
|recommended external input<br>fuse|3.15A/300V, slow-blow, required|||||
|**OUTPUT**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
||3.3 & 5 Vdc output model|||8,000|μF|
||9 Vdc output model|||5,400|μF|
|capacitive load|12 Vdc output model<br>15 Vdc output model|||4,000<br>3,000|μF<br>μF|
||24 Vdc output model|||1,000|μF|
||48 Vdc output model|||330|μF|
|output voltage accuracy|||±2||%|
|line regulation|at full load||±0.5||%|
|load regulation|0~100% load||±1.0||%|
|hold-up time|at 115 Vac<br>at 230 Vac||5<br>40||ms<br>ms|
|switching frequency|||70||kHz|
|temperature coefcient|||±0.02||%/°C|
||at 230 Vac|||||
|no load power consumption|3.3 Vdc, 5 Vdc, 9 Vdc, 12 Vdc, 15 Vdc & 24 Vdc outputs||0.12||W|
||48 Vdc output||0.2||W|
|**PROTECTIONS**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
||clamp or hiccup|||||
||3.3 & 5 Vdc output|||7.5|Vdc|
|over voltage protection|9 & 12 Vdc output<br>15 Vdc output|||16<br>20|Vdc<br>Vdc|
||24 Vdc output|||30|Vdc|
||48 Vdc output|||60|Vdc|
|over current protection|auto recovery||120||%|
|short circuit protection|continuous, auto recovery, hiccup|||||



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**date** 12/15/2023 **│ page** 3 of 7 

## **SAFETY & COMPLIANCE** 

|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|---|---|---|---|---|---|
|isolation voltage|input to output for 1 minute, 5mA max|4,200|||Vac|
|safety approvals|certifed to 62368-1: UL, EN, IEC<br>designed to meet 60335: EN, IEC|||||
|safety class|Class II|||||
|conducted emissions|CISPR32/EN55032 CLASS B|||||
|radiated emissions|CISPR32/EN55032 CLASS B|||||
|ESD|IEC/EN61000-4-2  Contact ±6KV/Air ±8KV, perf. Criteria A|||||
|radiated immunity|IEC/EN61000-4-3  10V/m, perf. Criteria A|||||
|EFT/burst|IEC/EN61000-4-4  ±2KV, perf. Criteria A<br>IEC/EN61000-4-4  ±4KV, perf. Criteria A (see Fig. 2|& Fig. 3 for recommended||circuit)||
||IEC/EN61000-4-5  line to line ±1KV, perf. Criteria A|||||
|surge|IEC/EN61000-4-5  line to line ±2KV/line to PE ±4KV,|perf. Criteria A||||
||(see Fig. 2 & Fig. 3 for recommended circuit)|||||
|conducted immunity|IEC/EN61000-4-6  10Vrms, perf. Criteria A|||||
|PFMF|IEC/EN61000-4-8  10A/m, perf. Criteria A|||||
|voltage dips and interruption|IEC/EN61000-4-11 0%, 70%, perf. Criteria B|||||
|MTBF|MIL-HDBK-217F at 25°C|1,000,000|||hours|
|RoHS|yes|||||
|**ENVIRONMENTAL**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|operating temperature|see derating curve|-40||85|°C|
|storage temperature||-40||85|°C|
|storage humidity||0||95|%|
|**SOLDERABILITY**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|wave soldering|5~10 seconds max|255|260|265|°C|
|hand soldering|3~5 seconds max|350|360|370|°C|
|**MECHANICAL**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|dimensions|52.40 x 27.20 x 24.00 [2.063 x 1.070 x 0.945 inches]||||mm|
|weight|||55||g|
|case material|black plastic, fame-retardant and heat-resistant (UL94V-0)|||||
|cooling method||||||



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

**date** 12/15/2023 **│ page** 4 of 7 

## **MECHANICAL DRAWING** 

units: mm [inch] pin 1,2,4,5: Ø1.05 [0.041] pin diameter tolerance: ±0.1 [±0.004] tolerance: ±0.50 [±0.020] 

|PIN CONNECTIONS|PIN CONNECTIONS|
|---|---|
|PIN|Function|
|1|AC(N)|
|2|AC(L)|
|3|no pin|
|4|-Vo|
|5|+Vo|



## **APPLICATION DESIGN REFERENCE** 

## **Output Filtering Components:** 

C1 is a ceramic capacitor used for filtering high-frequency noise and TVS is a recommended suppressor diode to protect the application in case of a converter failure. 

## **Figure 1** 

**Table 1** 

|||**Table 1**|||
|---|---|---|---|---|
|Part No.|Fuse|C1|C2|TVS|
|PSK-20F-3|3.15A/300V,<br>slow blow,<br>required|1µF/50V|820µF/16V|SMBJ7.0A|
|PSK-20F-5|||820µF/16V|SMBJ7.0A|
|PSK-20F-9|||10µF/25V|SMBJ12A|
|PSK-20F-12|||10µF/25V|SMBJ16A|
|PSK-20F-15|||10µF/25V|SMBJ20A|
|PSK-20F-24|||10µF/35V|SMBJ30A|
|PSK-20F-48||1µF/100V|10µF/65V|SMBJ60A|



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

**date** 12/15/2023 **│ page** 5 of 7 

## **EMC RECOMMENDED CIRCUIT** 

## **Figure 2** 

Note: EMC application circuit with higher requirements. 

## **Table 2** 

||**Table 2**|
|---|---|
|Components|Recommended Value|
|FUSE|3.15A/300V, slow-blow, required|
|MOV|S14K350|
|R1|12Ω/5W(wire-wound resistor, required)|



## **Figure 3** 

Note: EMC application circuit with higher requirements(Class I). 

## **Table 3** 

||**Table 3**|
|---|---|
|Components|Recommended Value|
|FUSE|3.15A/300V, slow-blow, required|
|MOV|S14K350|
|R1|12Ω/5W(wire-wound resistor, required)|
|CX|0.1μF/310Vac|
|L1|4.7μH/2A|
|LCM|10mH/0.6A|
|CY1, CY2|1000pF/400Vac|



Note: Rx1/Rx2/Rx3/Rx4/Rx5/Rx6 is the bleeder resistance of CX, and the recommended resistance value is 15MΩ/150Vdc. 

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**date** 12/15/2023 **│ page** 6 of 7 

## **DERATING CURVE** 

- Note: 1. With an AC input between 85~100V/277~305Vac and a DC input between 100~120V/390~430Vdc, the output power must be derated as per temperature derating curves. 2. This product is suitable for applications using natural air cooling; for applications in closed enviroment please consult with CUI. 

## **EFFICIENCY CURVES** 

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**date** 12/15/2023 **│ page** 7 of 7 

## **REVISION HISTORY** 

|**rev.**|**description**|**date**|
|---|---|---|
|1.0|initial release|11/14/2023|
|1.01|mechanical drawingupdated|12/15/2023|



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

**==> picture [155 x 34] intentionally omitted <==**

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