AC/DC 150W Enclosed Switching Power Supply – LM150-20Ax Series

A Superior Power Solution for Demanding Applications

The LM150-20Ax Series represents a line of high-performance, dual-output, enclosed AC-DC switching power supplies from MORNSUN. Engineered for exceptional reliability and flexibility, these units are particularly suited for the laser galvanometer industry while also serving a broad range of applications including current sensors and motor drives. Designed with universal input and robust protection features, they deliver stable and clean power in challenging environments.

Core Features and Benefits
This series boasts a comprehensive set of features that ensure operational excellence:

• Industry-Specific Design: Optimized for the precise requirements of the laser galvanometer industry.
• Extreme Operational Range: Functions reliably in ambient temperatures from -30℃ to +70℃ and at altitudes up to 5000 meters.
• Universal Input: Accepts a wide range of AC (85-264VAC) or DC (120-373VDC) input voltages using the same terminals, simplifying system design.
• Robust Safety and Isolation: Features high I/O isolation tested at 4000VAC and complies with key international safety standards, including UL/EN62368-1.
• Comprehensive Protection: Integrated short-circuit, over-current, and over-voltage protection with self-recovery capabilities safeguard both the power supply and connected equipment.
• High Efficiency and Low Noise: Delivers high conversion efficiency, minimizing energy loss and heat generation, while maintaining low ripple and noise output.
• Proven Reliability: Backed by a calculated MTBF of ≥300,000 hours and a 3-year warranty, ensuring long-term performance.

Product Model Overview

The LM150-20Ax Series consists of two primary models, both certified to BIS standards and utilizing efficient air-cooling with a total output power of 150W.

The LM150-20A15 model provides symmetrical dual outputs of +15V at 5A and -15V at 5A. The positive output voltage is adjustable within a range of 13.5V to 16.5V. This model achieves a typical efficiency of 86% at 230VAC input and can support a maximum capacitive load of 6000µF per output.

The LM150-20A24 model provides symmetrical dual outputs of +24V at 3.125A and -24V at 3.125A. The positive output voltage is adjustable from 21.6V to 26.4V. It offers a slightly higher typical efficiency of 88% at 230VAC and supports a maximum capacitive load of 2400µF per output.

Detailed Technical Specifications

Input Specifications:
The power supply accepts a universal input of 85-264VAC at 47-63Hz or 120-373VDC. Maximum input current is 4A at 115VAC and 2A at 230VAC. Typical inrush current is limited to 30A (115VAC) and 60A (230VAC). A built-in 6.3A fuse and a start-up delay of less than 1 second at rated load are standard. Hot plug operation is not supported.

Output Performance:
Output voltage accuracy is excellent, with ±1% for the primary output (Vo1) and ±3% for the auxiliary output (Vo2) across the full load range. Line and load regulation are equally robust. Ripple and noise are minimized, measuring below 150mV peak-to-peak (using the tip-and-barrel method with a 20MHz bandwidth). Protections include self-recovering short-circuit protection, over-current protection (125-200% of rated current), and over-voltage protection set at ≤21.75V for 15V models and ≤33.6V for 24V models.

General & Environmental Data:
The unit provides reinforced isolation, with 4000VAC isolation between input and output. It operates reliably in temperatures from -30℃ to +70℃, with storage from -40℃ to +85℃, and up to 95% relative humidity (non-condensing). A power derating of 2.5%/℃ is required above 50℃. The switching frequency is 65kHz. The power supply meets rigorous environmental and safety standards, including IEC/EN61000-4 for immunity and CISPR32/EN55032 Class B for emissions. It is housed in a sturdy metal enclosure (AL1100, SGCC) measuring 159.00 x 97.00 x 30.00 mm and weighing approximately 450g.

Electromagnetic Compatibility:
The LM150-20Ax Series is designed for excellent EMC performance. It complies with CISPR32/EN55032 Class B for both conducted and radiated emissions. Immunity is robust, meeting standards for Electrostatic Discharge (±6kV contact, ±8kV air), Radiated Fields (10V/m), Electrical Fast Transients (±4kV), Surge (±2kV line-line, ±4kV line-ground), and more, ensuring stable operation in electrically noisy environments.

Contact for Technical Support
For detailed application notes, customization inquiries, or technical support, please contact our engineering team at: Vic@feisman.cn.