MEAN WELL SKA40 series: Isolated single-output DC-DC converter - SKA40B-12

Description

SKA40B-12 — Isolated single-output DC-DC converter

MEAN WELL SKA40B-12 is an isolated, regulated single-output DC-DC converter with 18–36 V DC input and 12 V DC output. Its rated output is 40 W with a 0.3–3.33 A output-current range. Remote ON/OFF, remote sense and external trimming are built in.

Download MEAN WELL SKA40 Datasheet (PDF)

Series section: PDF pages 6–7.

Model and output specifications

Output voltage 12 V DC.
Output current range 0.3–3.33 A. Maintain at least 0.3 A output load.
Rated output power 40 W.
Voltage accuracy ±2.0%.
Line regulation ±0.5%; measured from low to high input at rated load.
Load regulation ±0.5%; measured from 10% to 100% of rated load.
Ripple and noise 80 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 200 kHz minimum.
Maximum capacitive load 1000 µF.
Output adjustment ±10% typical. Connect a trim resistor between TRIM (pin 8) and −Vout (pin 7) to raise the output, or between TRIM and +Vout (pin 6) to lower it. The drawing shows a 500 kΩ trimpot across the output with its wiper connected to TRIM.
Remote sense Built-in remote sense: pin 4 is −R.S and pin 5 is +R.S.

Input, control and protection

Input voltage 18–36 V DC; 2:1 input range.
Typical efficiency 90% under the reference test conditions.
Input DC current 1900 mA at full load; 100 mA at no load.
Input filter and fuse Pi-network input filter. An input fuse is recommended.
Remote ON/OFF R.C (pin 1), referenced to −Vin (pin 2): ON at greater than 2.5 V up to 75 V DC, or with the control open; OFF below 0.5 V DC, or shorted to −Vin.
Overcurrent protection 110–180% of rated output power; hiccup mode with automatic recovery after the fault is removed.
Short-circuit protection All outputs are protected by hiccup mode, with automatic recovery after the fault is removed.
Fault-duration limit Do not operate in overload or short circuit for more than 30 seconds.
Output overvoltage protection 15–19.2 V; clamping by a TVS diode.

Operating conditions and isolation

Operating temperature and cooling −40 to +80°C; free-air convection. Apply the stated load derating.
Load derating The graph permits 100% load through +60°C, decreasing to 50% at +80°C. The operating range ends at +80°C; the further graph extension does not extend this rating.
Working humidity 20–90% RH, non-condensing.
Storage conditions −55 to +105°C; 10–95% RH.
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 and 70% RH, unless otherwise specified.
Input-to-output withstand voltage 1.5 kV DC.
Isolation resistance 100 MΩ between input and output, tested at 500 V DC, 25°C and 70% RH.

Mechanical design and installation

Dimensions 50.8 × 50.8 × 11.0 mm (L × W × H).
Pin assignment Pin 1: R.C; pin 2: −Vin; pin 3: +Vin; pin 4: −R.S; pin 5: +R.S; pin 6: +Vout; pin 7: −Vout; pin 8: TRIM. Check the bottom-view orientation before PCB assembly.
Mechanical drawing details Six-sided shielded metal case. Lead projection 5.8 mm; pin diameter 1.0 mm (the inch annotation is 0.04 ±0.005 in). Pin-row spacing 45.7 mm. Use the complete bottom-view drawing for the PCB footprint.
Unit weight reference 50 g, stated as a catalog packing reference per unit.
Manufacturer packaging reference 5 pieces per tube; tube gross weight 320 g. Up to 200 pieces per carton; carton gross weight 13.6 kg. These are manufacturer packaging references.

Standards and manufacturer references

Safety standards EAC TP TC 020/2011 approved. The catalog limits EAC TP TC 004 approval to the 48 V input type.
EMC emission BS EN/EN55032 Class A, FCC Part 15 Class A and EAC TP TC 020.
EMC immunity BS EN/EN61000-4-2, -3, -4, -5, -6 and -8; light-industry level, criteria A; EAC TP TC 020.
Catalog markings FCC, EAC, CE and UKCA are shown in the catalog.
Manufacturing test 100% burn-in test.
Manufacturer warranty reference The catalog states a 2-year manufacturer warranty.
Optional versions The series lists 3.3 V and 9 V output alternatives. These are separate factory configurations, not adjustment settings or an alternate rating of this model; confirm the complete ordering code with the manufacturer.

MEAN WELL SKA40 series: Isolated single-output DC-DC converter - SKA40B-12

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SKA40B-12 — Isolated single-output DC-DC converter MEAN WELL SKA40B-12 is an isolated, regulated single-output DC-DC converter with 18–36 V DC... Read more

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    Description

    SKA40B-12 — Isolated single-output DC-DC converter

    MEAN WELL SKA40B-12 is an isolated, regulated single-output DC-DC converter with 18–36 V DC input and 12 V DC output. Its rated output is 40 W with a 0.3–3.33 A output-current range. Remote ON/OFF, remote sense and external trimming are built in.

    Download MEAN WELL SKA40 Datasheet (PDF)

    Series section: PDF pages 6–7.

    Model and output specifications

    Output voltage 12 V DC.
    Output current range 0.3–3.33 A. Maintain at least 0.3 A output load.
    Rated output power 40 W.
    Voltage accuracy ±2.0%.
    Line regulation ±0.5%; measured from low to high input at rated load.
    Load regulation ±0.5%; measured from 10% to 100% of rated load.
    Ripple and noise 80 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 200 kHz minimum.
    Maximum capacitive load 1000 µF.
    Output adjustment ±10% typical. Connect a trim resistor between TRIM (pin 8) and −Vout (pin 7) to raise the output, or between TRIM and +Vout (pin 6) to lower it. The drawing shows a 500 kΩ trimpot across the output with its wiper connected to TRIM.
    Remote sense Built-in remote sense: pin 4 is −R.S and pin 5 is +R.S.

    Input, control and protection

    Input voltage 18–36 V DC; 2:1 input range.
    Typical efficiency 90% under the reference test conditions.
    Input DC current 1900 mA at full load; 100 mA at no load.
    Input filter and fuse Pi-network input filter. An input fuse is recommended.
    Remote ON/OFF R.C (pin 1), referenced to −Vin (pin 2): ON at greater than 2.5 V up to 75 V DC, or with the control open; OFF below 0.5 V DC, or shorted to −Vin.
    Overcurrent protection 110–180% of rated output power; hiccup mode with automatic recovery after the fault is removed.
    Short-circuit protection All outputs are protected by hiccup mode, with automatic recovery after the fault is removed.
    Fault-duration limit Do not operate in overload or short circuit for more than 30 seconds.
    Output overvoltage protection 15–19.2 V; clamping by a TVS diode.

    Operating conditions and isolation

    Operating temperature and cooling −40 to +80°C; free-air convection. Apply the stated load derating.
    Load derating The graph permits 100% load through +60°C, decreasing to 50% at +80°C. The operating range ends at +80°C; the further graph extension does not extend this rating.
    Working humidity 20–90% RH, non-condensing.
    Storage conditions −55 to +105°C; 10–95% RH.
    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 and 70% RH, unless otherwise specified.
    Input-to-output withstand voltage 1.5 kV DC.
    Isolation resistance 100 MΩ between input and output, tested at 500 V DC, 25°C and 70% RH.

    Mechanical design and installation

    Dimensions 50.8 × 50.8 × 11.0 mm (L × W × H).
    Pin assignment Pin 1: R.C; pin 2: −Vin; pin 3: +Vin; pin 4: −R.S; pin 5: +R.S; pin 6: +Vout; pin 7: −Vout; pin 8: TRIM. Check the bottom-view orientation before PCB assembly.
    Mechanical drawing details Six-sided shielded metal case. Lead projection 5.8 mm; pin diameter 1.0 mm (the inch annotation is 0.04 ±0.005 in). Pin-row spacing 45.7 mm. Use the complete bottom-view drawing for the PCB footprint.
    Unit weight reference 50 g, stated as a catalog packing reference per unit.
    Manufacturer packaging reference 5 pieces per tube; tube gross weight 320 g. Up to 200 pieces per carton; carton gross weight 13.6 kg. These are manufacturer packaging references.

    Standards and manufacturer references

    Safety standards EAC TP TC 020/2011 approved. The catalog limits EAC TP TC 004 approval to the 48 V input type.
    EMC emission BS EN/EN55032 Class A, FCC Part 15 Class A and EAC TP TC 020.
    EMC immunity BS EN/EN61000-4-2, -3, -4, -5, -6 and -8; light-industry level, criteria A; EAC TP TC 020.
    Catalog markings FCC, EAC, CE and UKCA are shown in the catalog.
    Manufacturing test 100% burn-in test.
    Manufacturer warranty reference The catalog states a 2-year manufacturer warranty.
    Optional versions The series lists 3.3 V and 9 V output alternatives. These are separate factory configurations, not adjustment settings or an alternate rating of this model; confirm the complete ordering code with the manufacturer.

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