MEAN WELL SKA15 series: Isolated single-output DC-DC converter - SKA15B-033

Description

SKA15B-033 — Isolated single-output DC-DC converter

MEAN WELL SKA15B-033 is an isolated, regulated single-output DC-DC converter accepting 18–36 V DC. It provides 3.3 V DC with 300–3000 mA. It uses a 2 × 1 inch package and requires the specified minimum load.

Download MEAN WELL SKA15 Datasheet (PDF)

Series section: PDF pages 5–6.

Model and output specifications

Output voltage 3.3 V DC.
Rated output current 300–3000 mA.
Series power and load limit 9.9 W. Observe the current range and power limit together.
Minimum load Maintain the specified 300 mA minimum.
Voltage accuracy ±2.0%
Line regulation ±0.2%; low-to-high input at rated load.
Load regulation ±0.5%, measured over 10–100% load.
Ripple and noise 50 mVp-p maximum. Measured at 20 MHz bandwidth with a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors.
Switching frequency 150 kHz minimum.
Maximum capacitive load 2700 µF.

Input and protection

Input voltage 18–36 V DC; 2:1 range.
Input current 30 mA at no load; 800 mA at full load.
Typical efficiency 76% at the reference conditions.
Input filter and fuse Built-in EMI filter with Pi network. An external input fuse is recommended.
Overload protection 110–250% of rated output power; hiccup mode with automatic recovery after removal of the fault.
Short-circuit protection All outputs protected; hiccup mode with automatic recovery after removal of the fault.
Fault-duration limit Do not operate in overload or short circuit for longer than 30 seconds.
Optional configurations 4:1 input-range and 3 kV isolation versions are listed as options. These values do not replace this model’s standard 2:1 input and 1.5 kV isolation; confirm the requested configuration with the manufacturer.

Operating conditions and isolation

Operating temperature and cooling −40 to +71°C; free-air convection. Apply the load-derating limits.
Load derating Full load through 60°C; the curve shows 80% load at 71°C. Do not extend operation beyond the specified temperature range.
Working humidity 20–90% RH, non-condensing.
Storage conditions −40 to +105°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 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 × 11.27 mm (L × W × H).
Case construction Metal case with shielding on all six sides; 100% burn-in tested. The catalog describes a low-cost design with an emphasis on reliability.
Pin assignment 1 +Vin; 2 −Vin; 3 +Vout; 4 No Pin; 5 −Vout. Check the bottom-view orientation before PCB assembly.
Mechanical drawing details Lead length 5.8 mm; pin diameter 1 mm (+0.2/−0.1 mm); general tolerance ±0.5 mm.
Unit weight reference 31.2 g, explicitly stated as a catalog packing reference per unit.

EMC and manufacturer references

Safety and catalog references EAC TP TC 020/2011 approved.
EMC emission BS EN/EN 55032 Class A; FCC Part 15 Class A; 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.
MTBF reference 300 khrs minimum to MIL-HDBK-217F at 25°C; a reliability reference, not a service-life guarantee.
Manufacturer warranty reference The catalog states a 2-year manufacturer warranty.

MEAN WELL SKA15 series: Isolated single-output DC-DC converter - SKA15B-033

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SKA15B-033 — Isolated single-output DC-DC converter MEAN WELL SKA15B-033 is an isolated, regulated single-output DC-DC converter accepting 18–36 V DC.... Read more

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    Description

    SKA15B-033 — Isolated single-output DC-DC converter

    MEAN WELL SKA15B-033 is an isolated, regulated single-output DC-DC converter accepting 18–36 V DC. It provides 3.3 V DC with 300–3000 mA. It uses a 2 × 1 inch package and requires the specified minimum load.

    Download MEAN WELL SKA15 Datasheet (PDF)

    Series section: PDF pages 5–6.

    Model and output specifications

    Output voltage 3.3 V DC.
    Rated output current 300–3000 mA.
    Series power and load limit 9.9 W. Observe the current range and power limit together.
    Minimum load Maintain the specified 300 mA minimum.
    Voltage accuracy ±2.0%
    Line regulation ±0.2%; low-to-high input at rated load.
    Load regulation ±0.5%, measured over 10–100% load.
    Ripple and noise 50 mVp-p maximum. Measured at 20 MHz bandwidth with a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors.
    Switching frequency 150 kHz minimum.
    Maximum capacitive load 2700 µF.

    Input and protection

    Input voltage 18–36 V DC; 2:1 range.
    Input current 30 mA at no load; 800 mA at full load.
    Typical efficiency 76% at the reference conditions.
    Input filter and fuse Built-in EMI filter with Pi network. An external input fuse is recommended.
    Overload protection 110–250% of rated output power; hiccup mode with automatic recovery after removal of the fault.
    Short-circuit protection All outputs protected; hiccup mode with automatic recovery after removal of the fault.
    Fault-duration limit Do not operate in overload or short circuit for longer than 30 seconds.
    Optional configurations 4:1 input-range and 3 kV isolation versions are listed as options. These values do not replace this model’s standard 2:1 input and 1.5 kV isolation; confirm the requested configuration with the manufacturer.

    Operating conditions and isolation

    Operating temperature and cooling −40 to +71°C; free-air convection. Apply the load-derating limits.
    Load derating Full load through 60°C; the curve shows 80% load at 71°C. Do not extend operation beyond the specified temperature range.
    Working humidity 20–90% RH, non-condensing.
    Storage conditions −40 to +105°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 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 × 11.27 mm (L × W × H).
    Case construction Metal case with shielding on all six sides; 100% burn-in tested. The catalog describes a low-cost design with an emphasis on reliability.
    Pin assignment 1 +Vin; 2 −Vin; 3 +Vout; 4 No Pin; 5 −Vout. Check the bottom-view orientation before PCB assembly.
    Mechanical drawing details Lead length 5.8 mm; pin diameter 1 mm (+0.2/−0.1 mm); general tolerance ±0.5 mm.
    Unit weight reference 31.2 g, explicitly stated as a catalog packing reference per unit.

    EMC and manufacturer references

    Safety and catalog references EAC TP TC 020/2011 approved.
    EMC emission BS EN/EN 55032 Class A; FCC Part 15 Class A; 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.
    MTBF reference 300 khrs minimum to MIL-HDBK-217F at 25°C; a reliability reference, not a service-life guarantee.
    Manufacturer warranty reference The catalog states a 2-year manufacturer warranty.

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