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AC/DC Converter - LD03-23BxxR2 Series

  • Writer: MORNSUN POWER
    MORNSUN POWER
  • Jan 22
  • 3 min read

Product OverviewThe

LD03-23BxxR2 series is one of MORNSUN's compact size AC-DC power converters. It features an ultra-wide AC input range and simultaneously accepts DC input voltage. This series boasts low power consumption, high efficiency, high reliability, and reinforced isolation. It offers good EMC performance compliant with IEC/EN61000-4 and CISPR32/EN55032 standards, and meets UL/IEC62368, EN60335, and EN61558 standards. These converters are widely used in industrial, power, home appliances, instrumentation, communication, and civil applications. For extremely harsh EMC environments, it is recommended to use the application circuit shown in the Design Reference section of this datasheet.

Key Features

  • Ultra-wide input voltage range: 85 - 305VAC and 100 - 430VDC.

  • 1 x 1 inch compact size.

  • Operating ambient temperature range: -40°C to +85°C.

  • Up to 79% efficiency.

  • Low no-load power consumption: 0.1W.

  • Suitable for applications up to 5000m altitude.

  • Plastic case meets UL94V-0 flammability rating.

  • EMI performance meets CISPR32/EN55032 CLASS B and EN55014 standards.

Selection GuideThe series includes the following models, all EN/IEC certified with 3W output power:

  • LD03-23B03R2: Nominal output: 3.3V / 900mA. Typical efficiency at 230VAC: 71%. Maximum capacitive load: 4000 uF.

  • LD03-23B05R2: Nominal output: 5V / 600mA. Typical efficiency at 230VAC: 75%. Maximum capacitive load: 3000 uF.

  • LD03-23B09R2: Nominal output: 9V / 333mA. Typical efficiency at 230VAC: 77%. Maximum capacitive load: 1200 uF.

  • LD03-23B12R2: Nominal output: 12V / 250mA. Typical efficiency at 230VAC: 77%. Maximum capacitive load: 1200 uF.

  • LD03-23B15R2: Nominal output: 15V / 200mA. Typical efficiency at 230VAC: 78%. Maximum capacitive load: 680 uF.

  • LD03-23B24R2: Nominal output: 24V / 125mA. Typical efficiency at 230VAC: 78%. Maximum capacitive load: 220 uF.

Notes:

  1. Use suffix "A25" for chassis mounting and suffix "A45" for DIN-Rail mounting.

  2. Product pictures are for reference only. Please refer to the actual product for details.

Detailed SpecificationsInput Specifications:

  • Input Voltage Range: AC Input: 85-305 VAC; DC Input: 100-430 VDC.

  • Input Frequency: 47-63 Hz.

  • Input Current (Max.): 0.08 A at 115VAC; 0.06 A at 230VAC.

  • Inrush Current (Typ.): 15 A at 115VAC; 25 A at 230VAC.

  • Leakage Current: 0.25 mA RMS (Max.) at 277VAC/50Hz.

  • Recommended External Input Fuse: 1A, slow-blow, required (selection must be adapted to the specific application environment).

  • Hot Plug: Unavailable.

Output Specifications:

  • Output Voltage Accuracy: 3.3V output: ±3%; other outputs: ±2%.

  • Line Regulation: ±0.5% (full load).

  • Load Regulation: ±1% (0%-100% load).

  • Ripple & Noise: 50 mVp-p (Typ.), 100 mVp-p (Max.), measured with 20MHz bandwidth using the "Tip and barrel method" (output parallel 10uF electrolytic and 1uF ceramic capacitor).

  • Standby Power Consumption: 0.10 W (Typ.) at 230VAC.

  • Temperature Coefficient: ±0.02%/°C.

  • Protections:

    • Short Circuit: Hiccup mode, continuous, self-recovering.

    • Over-current: ≥200% Io, self-recovering.

    • Over-voltage: 3.3/5V output ≤7.5VDC; 9V output ≤15VDC; 12V output ≤16VDC; 15V output ≤20VDC; 24V output ≤30VDC.

  • Minimum Load: 0%.

  • Hold-up Time: 5 ms (Typ.) at 115VAC input.

General, Safety & Mechanical Specifications:

  • Isolation (Input-Output): 4000 VAC for 1 min (leakage current <6mA).

  • Operating Temperature: -40°C to +85°C.

  • Storage Temperature: -40°C to +85°C.

  • Storage Humidity: Up to 95% RH.

  • Soldering Temperature: Wave-soldering: 260 ±5°C for 5-10s; Manual welding: 360 ±10°C for 3-5s.

  • Switching Frequency: 65 kHz (Typ.).

  • Power Derating: From +70°C to +85°C: 2.33%/°C for 3.3V model, 1.33%/°C for others. From 85VAC to 100VAC: 1.33%/VAC.

  • Maximum Operating Altitude: 5000 m.

  • Safety Standards: EN/IEC/BS EN62368-1, EN61558-1, EN60335-1 safety approved; design refers to UL62368-1.

  • Safety Class: CLASS II.

  • MTBF: ≥2799,000 hours (MIL-HDBK-217F @25°C).

  • Designed Life: >150 x 10³ hours at 25°C, 100% load (230VAC); >27 x 10³ hours at 70°C, 100% load (230VAC).

  • Case Material: Block plastic, flame-retardant and heat-resistant (UL94V-0).

  • Dimensions: Horizontal package: 25.40 x 25.40 x 17.60 mm; A25 mounting: 76.00 x 31.50 x 26.40 mm; A45 mounting: 76.00 x 31.50 x 31.00 mm.

  • Weight: Horizontal package: 17.5g (Typ.); A25 mounting: 38.0g (Typ.); A45 mounting: 58.0g (Typ.).

  • Cooling Method: Free air convection.

EMC Performance & Application Notes:

  • Emissions: Complies with CISPR32/EN55032 CLASS B and EN55014-1 for both Conducted (CE) and Radiated (RE) Emissions.

  • Immunity: Complies with relevant IEC/EN61000-4-2, -4-3, -4-4, -4-5, -4-6, -4-11, and EN55014-2 standards. Performance criteria and required application circuits vary; please refer to the detailed datasheet tables and design reference circuits (Fig. 1, Fig. 2, Fig. 3) for specific compliance levels.

  • Application Notes:

    1. With an AC input between 85-100VAC or a DC input between 100-120VDC, the output power must be derated according to the temperature derating curves.

    2. Suitable for natural air cooling; for closed environments, consult MORNSUN FAE.

    3. Detailed typical application and EMC-recommended circuits with specific component values (C1, C2, FUSE, R1, TVS, MOV, CX, L1, CY, GDT, LCM) are provided in the design reference section.

Contact for SupportFor technical inquiries or further information, please contact: Vic@feisman.cn

For more details, please contact the supplier by email or send an inquiry： Vic@feisman.cn


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