MEAN WELL SKA20 series: Isolated regulated single-output DC-DC converter - SKA20C-05

Description

SKA20C-05 — Isolated regulated single-output DC-DC converter

MEAN WELL SKA20C-05 is an isolated, regulated single-output DC-DC converter with 5 V DC output and a specified current range of 400–4000 mA. Its 2 × 1 inch package accepts 36–75 V DC and provides 1.5 kV DC input-to-output isolation. Remote ON/OFF control and external output adjustment are built in.

Download MEAN WELL SKA20 Datasheet (PDF)

Series section: PDF pages 7–8.

Model and output specifications

Complete model SKA20C-05
Model selection SKA20 identifies the 20 W single-output series. Input code C selects 36–75 V DC; output code 05 selects 5 V DC.
Output voltage 5 V DC.
Output current range 400–4000 mA. Maintain the specified minimum load.
Rated power and load limit 20 W. Observe the stated current limits and total power limit together.
Voltage accuracy ±2.0%.
Line regulation ±0.2%, measured from low to high input voltage at rated load.
Load regulation ±0.5%, measured over 10–100% of rated load.
Ripple and noise 50 mVp-p maximum, measured at 20 MHz bandwidth using a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors.
Switching frequency 300 kHz typical.
Maximum capacitive load 1000 µF.

Input and protection

Input voltage 36–75 V DC; 2:1 input range.
Input current 40 mA at no load; 490 mA at full load, at the reference test conditions.
Typical efficiency 88.5% at the reference test conditions.
Input filter and protection Built-in EMI filter with a Pi network. An external input fuse is recommended.
Overload protection 110–180% of rated output power; hiccup mode with automatic recovery after the fault is removed.
Short-circuit protection All outputs are protected; hiccup mode with automatic recovery after the fault is removed.
Fault-duration limit Do not allow operation in overload or short circuit for more than 30 seconds.
Input overvoltage protection The listed typical input protection threshold is >80–82 V DC. This is a protection threshold, not an extension of the normal input range.
Output overvoltage protection The catalog specifies shutdown of the output voltage with automatic recovery after the fault is removed. No numeric output trip voltage is stated.

Control and output adjustment

Remote ON/OFF control R.C. is referenced to −Vin. Power ON: above 2.5 V up to 30 V DC, or open circuit. Power OFF: below 0.5 V DC, or short circuit to −Vin.
External output trim −10% to +10%, typical. The reference circuit connects a variable resistance from Trim to −Vout for trim-up, or from Trim to +Vout for trim-down. The three-terminal trimpot example uses 20 kΩ across +Vout and −Vout with its wiper connected to Trim pin 4. Follow the complete diagram; observe current and power limits during adjustment.

Operating conditions and isolation

Operating temperature and cooling −40 to +85°C, with free-air convection and the specified derating.
Load derating Full load through 75°C; reduce to 50% load at 85°C.
Working humidity 20–90% RH, non-condensing.
Storage conditions −55 to +125°C; 10–95% RH, non-condensing.
Temperature coefficient ±0.03%/°C over 0–50°C.
Vibration 10–500 Hz, 2G; 10 minutes per cycle for 60 minutes along each of the X, Y and Z axes.
Reference test conditions Normal input, rated load, 25°C ambient and 70% RH, unless otherwise stated.
Input-to-output withstand voltage 1.5 kV DC.
Isolation resistance 100 MΩ at 500 V DC, 25°C and 70% RH.

Mechanical design and installation

Dimensions 50.8 × 25.4 × 11.2 mm (L × W × H), as listed in the specification.
Case and production testing Metal case with shielding on all six sides; 100% burn-in test. The catalog describes a low-cost design with an emphasis on reliability.
Pin assignment 1 +Vin; 2 −Vin; 3 +Vout; 4 Trim; 5 −Vout; 6 R.C. Check the bottom-view orientation before PCB assembly.
Mechanical drawing details Pin diameter: 1.0 ±0.10 mm. Lead length: 5.8 mm. Use the bottom-view drawing; the input-side spacing includes 7.62 mm and 5.08 mm intervals, and the pin-row separation is 20.3 mm.
Unit weight reference 31.2 g per converter, explicitly stated in the catalog packing entry.

EMC and manufacturer references

Safety standards EAC TP TC 020/2011 approved. The approval note also lists EAC TP TC 004 for the 48 V input type.
Catalog approvals FCC, EAC, CE and UKCA are listed in the manufacturer’s features.
EMC emission BS EN/EN 55032 Class A, FCC Part 15 Class A, and EAC TP TC 020.
EMC immunity BS EN/EN 61000-4-2, -4-3, -4-4, -4-5, -4-6 and -4-8; light-industrial level, criterion A; EAC TP TC 020.
Reliability reference MTBF: 700 khrs minimum to MIL-HDBK-217F at 25°C. This is a reliability reference value.
Manufacturer warranty reference The catalog states a 2-year manufacturer warranty.

MEAN WELL SKA20 series: Isolated regulated single-output DC-DC converter - SKA20C-05

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SKA20C-05 — Isolated regulated single-output DC-DC converter MEAN WELL SKA20C-05 is an isolated, regulated single-output DC-DC converter with 5 V... Read more

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    Description

    SKA20C-05 — Isolated regulated single-output DC-DC converter

    MEAN WELL SKA20C-05 is an isolated, regulated single-output DC-DC converter with 5 V DC output and a specified current range of 400–4000 mA. Its 2 × 1 inch package accepts 36–75 V DC and provides 1.5 kV DC input-to-output isolation. Remote ON/OFF control and external output adjustment are built in.

    Download MEAN WELL SKA20 Datasheet (PDF)

    Series section: PDF pages 7–8.

    Model and output specifications

    Complete model SKA20C-05
    Model selection SKA20 identifies the 20 W single-output series. Input code C selects 36–75 V DC; output code 05 selects 5 V DC.
    Output voltage 5 V DC.
    Output current range 400–4000 mA. Maintain the specified minimum load.
    Rated power and load limit 20 W. Observe the stated current limits and total power limit together.
    Voltage accuracy ±2.0%.
    Line regulation ±0.2%, measured from low to high input voltage at rated load.
    Load regulation ±0.5%, measured over 10–100% of rated load.
    Ripple and noise 50 mVp-p maximum, measured at 20 MHz bandwidth using a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors.
    Switching frequency 300 kHz typical.
    Maximum capacitive load 1000 µF.

    Input and protection

    Input voltage 36–75 V DC; 2:1 input range.
    Input current 40 mA at no load; 490 mA at full load, at the reference test conditions.
    Typical efficiency 88.5% at the reference test conditions.
    Input filter and protection Built-in EMI filter with a Pi network. An external input fuse is recommended.
    Overload protection 110–180% of rated output power; hiccup mode with automatic recovery after the fault is removed.
    Short-circuit protection All outputs are protected; hiccup mode with automatic recovery after the fault is removed.
    Fault-duration limit Do not allow operation in overload or short circuit for more than 30 seconds.
    Input overvoltage protection The listed typical input protection threshold is >80–82 V DC. This is a protection threshold, not an extension of the normal input range.
    Output overvoltage protection The catalog specifies shutdown of the output voltage with automatic recovery after the fault is removed. No numeric output trip voltage is stated.

    Control and output adjustment

    Remote ON/OFF control R.C. is referenced to −Vin. Power ON: above 2.5 V up to 30 V DC, or open circuit. Power OFF: below 0.5 V DC, or short circuit to −Vin.
    External output trim −10% to +10%, typical. The reference circuit connects a variable resistance from Trim to −Vout for trim-up, or from Trim to +Vout for trim-down. The three-terminal trimpot example uses 20 kΩ across +Vout and −Vout with its wiper connected to Trim pin 4. Follow the complete diagram; observe current and power limits during adjustment.

    Operating conditions and isolation

    Operating temperature and cooling −40 to +85°C, with free-air convection and the specified derating.
    Load derating Full load through 75°C; reduce to 50% load at 85°C.
    Working humidity 20–90% RH, non-condensing.
    Storage conditions −55 to +125°C; 10–95% RH, non-condensing.
    Temperature coefficient ±0.03%/°C over 0–50°C.
    Vibration 10–500 Hz, 2G; 10 minutes per cycle for 60 minutes along each of the X, Y and Z axes.
    Reference test conditions Normal input, rated load, 25°C ambient and 70% RH, unless otherwise stated.
    Input-to-output withstand voltage 1.5 kV DC.
    Isolation resistance 100 MΩ at 500 V DC, 25°C and 70% RH.

    Mechanical design and installation

    Dimensions 50.8 × 25.4 × 11.2 mm (L × W × H), as listed in the specification.
    Case and production testing Metal case with shielding on all six sides; 100% burn-in test. The catalog describes a low-cost design with an emphasis on reliability.
    Pin assignment 1 +Vin; 2 −Vin; 3 +Vout; 4 Trim; 5 −Vout; 6 R.C. Check the bottom-view orientation before PCB assembly.
    Mechanical drawing details Pin diameter: 1.0 ±0.10 mm. Lead length: 5.8 mm. Use the bottom-view drawing; the input-side spacing includes 7.62 mm and 5.08 mm intervals, and the pin-row separation is 20.3 mm.
    Unit weight reference 31.2 g per converter, explicitly stated in the catalog packing entry.

    EMC and manufacturer references

    Safety standards EAC TP TC 020/2011 approved. The approval note also lists EAC TP TC 004 for the 48 V input type.
    Catalog approvals FCC, EAC, CE and UKCA are listed in the manufacturer’s features.
    EMC emission BS EN/EN 55032 Class A, FCC Part 15 Class A, and EAC TP TC 020.
    EMC immunity BS EN/EN 61000-4-2, -4-3, -4-4, -4-5, -4-6 and -4-8; light-industrial level, criterion A; EAC TP TC 020.
    Reliability reference MTBF: 700 khrs minimum to MIL-HDBK-217F at 25°C. This is a reliability reference value.
    Manufacturer warranty reference The catalog states a 2-year manufacturer warranty.

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