AC/DC Converter - LS05-K3BxxSS Series

Product Overview

The LS05-K3BxxSS series is one of MORNSUN's highly efficient green power AC-DC converter series. It features a wide input voltage range, accepting both DC and AC input voltage, with high reliability and low power consumption. All models are widely used in industrial control instrumentation, electric power applications, and smart home applications that have high requirements for compact dimensions, need to meet CE safety certifications, and have moderate demands for EMC compliance levels. For extremely harsh EMC environments, it is recommended to use the application circuit shown in the Design Reference section of this datasheet.

⚠️ Important Safety WarningThis is a non-isolated power supply. There is no insulation protection between the output and the input dangerous voltage. Beware of electric shock!

Key Features

• Ultra-wide input voltage range: 85 – 305VAC and 70 – 430VDC.

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

• Compact size, open frame design.

• Up to 77% efficiency.

• Green power design.

• Industrial-grade robustness.

• Flexible selection of EMC additional circuits simplifies customer PCB layout.

• Protections: Output short circuit and over-current.

Selection GuideThe EN-certified series includes the following models:

• LS05-K3B12SS: Output Power: 4W. Nominal Output: 12V / 330mA. Typical Efficiency at 230VAC: 75%.

• LS05-K3B15SS: Output Power: 5W. Nominal Output: 15V / 330mA. Typical Efficiency at 230VAC: 76%. Maximum Capacitive Load: 160 uF.

• LS05-K3B18SS: Output Power: 5W. Nominal Output: 18V / 280mA. Typical Efficiency at 230VAC: 77%.

Detailed SpecificationsInput Specifications:

• Input Voltage Range: AC Input: 85-305 VAC; DC Input: 70-430 VDC.

• Input Frequency: 47-63 Hz.

• Input Current (Max.): 0.2A at 115VAC; 0.14A at 230VAC.

• Inrush Current (Typ.): 25A at 115VAC; 40A at 230VAC.

• Recommended External Input Fuse: 1A/300V, slow-blow (required).

• Hot Plug: Unavailable.

Output Specifications:

• Output Voltage Accuracy: ±5% (at 10%-100% load).

• Line Regulation: ±1.5% (rated load).

• Load Regulation: ±3%.

• Ripple & Noise: 50 mVp-p (Typ.), 100 mVp-p (Max.), measured with 20MHz bandwidth using the “parallel cable” method.

• Temperature Coefficient: ±0.1%/°C.

• Standby Power Consumption (Max. at 230VAC Input): 12V Model: 0.1W; 15V Model: 0.16W; 18V Model: 0.2W.

• Protections:

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

  • Over-current: ≥110% Io, self-recovery.

• Minimum Load: 10%.

General, Safety & Mechanical Specifications:

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

• Storage Temperature: -40°C to +105°C.

• Storage Humidity: Up to 95% RH (non-condensing).

• Power Derating: Temperature: 2%/°C from -40°C to -20°C; 2.5%/°C from +65°C to +85°C. Input Voltage: 1.33%/VAC from 85VAC-100VAC; 1.1%/VAC from 277VAC-305VAC.

• Safety Standard: EN62368-1, BS EN62368-1 (Report) safety approval.

• MTBF: >1,000,000 hours (MIL-HDBK-217F @25°C).

• Dimensions: 16.13 x 15.10 x 9.50 mm.

• Weight: 4.5g (Typical).

• Cooling Method: Free air convection.

EMC Performance & Application Notes:

• Emissions: Conducted Emission (CE) and Radiated Emission (RE) compliance with CISPR32/EN55032 Class A or Class B depends on the use of the recommended circuits (Fig. 1 or Fig. 2).

• Immunity: Complies with relevant IEC/EN61000-4-2 (ESD), -4-3 (RS), -4-4 (EFT), -4-5 (Surge), -4-6 (CS), and -4-11 (Voltage dips) standards. Specific performance criteria and required circuits are detailed in the datasheet.

• Application Notes:

  1. For AC input between 85-100VAC/277-305VAC or DC input between 70-130VDC/400-430VDC, output power must be derated according to the temperature derating curves.

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

  3. External electrolytic capacitors are required. The module needs to be glued and fixed after assembly.

  4. To improve light-load efficiency, audible noise may be generated but does not affect performance or reliability.

  5. Detailed recommended application circuits (Fig. 1 & Fig. 2) with specific component values (FUSE, C1, C2, LDM, R1, R2, CX, RX) are provided for EMC compliance.

Dimensions and Pinout

• Pin 1: AC(L)

• Pin 2: +V(CAP)

• Pin 3: -Vo

• Pin 4: +Vo

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