AC-DC Switching Power Supply Module Series

Overview

This AC-DC switching power supply module series provides a compact, efficient solution for converting mains AC voltage into stable regulated DC output. Covering output voltages from 5V, 12V, 24V up to 36V with current ratings from 300mA to 8A, the series caters to a wide range of power requirements. Both bare PCB versions and enclosed wired versions are available to suit different installation scenarios. Built with high-frequency switching topology, these modules deliver high conversion efficiency with low heat generation. Selected models feature full galvanic isolation between input and output, ensuring safety for sensitive electronic equipment. The modules are widely used for equipment integration, industrial control, LED lighting, IoT devices, laboratory prototyping and DIY electronic projects across Europe.

Working Principle

The module operates on a high-frequency switching power supply architecture:

1. Input Rectification & Filtering: AC mains voltage (100–240VAC) is first rectified by a bridge rectifier and filtered by electrolytic capacitors into high-voltage DC.
2. High-Frequency Switching: A PWM controller drives a power MOSFET to chop the high-voltage DC into a high-frequency square-wave signal.
3. High-Frequency Transformer: The high-frequency AC passes through a ferrite-core transformer that steps down the voltage while providing galvanic isolation between primary and secondary sides.
4. Output Rectification & Filtering: The stepped-down high-frequency AC is rectified by fast-recovery diodes and filtered by low-ESR capacitors into smooth, clean DC output.
5. Feedback Regulation: The output voltage is sampled and fed back to the PWM controller via an optocoupler, which automatically adjusts the switching duty cycle to maintain a constant, stable output voltage under varying load conditions.

Key Features

1. ✅ Wide input voltage range: AC 100–240V, compatible with European mains standards
2. ✅ Multiple output voltages: 5V / 12V / 24V / 36V
3. ✅ Current ratings from 300mA up to 8A to match different load requirements
4. ✅ High-efficiency switching topology, low heat dissipation
5. ✅ Selected models with full galvanic isolation for enhanced safety
6. ✅ Compact form factor, pre-drilled mounting holes for easy integration
7. ✅ Two package types: bare PCB module and enclosed version with lead wires
8. ✅ Built-in over-current, over-voltage and short-circuit protection
9. ✅ Stable output voltage with low ripple and noise

Typical Applications

• Industrial control equipment internal power supply
• LED lighting drivers and smart home devices
• IoT sensor nodes and communication equipment
• Laboratory prototyping and electronic experiment platforms
• DIY electronics, audio equipment and hobbyist projects
• Security system and surveillance camera power supply
• Small household appliance power replacement

Important Notes

1. Please select the correct output voltage and current rating according to your load requirements.
2. Ensure proper heat dissipation when operating at or near maximum rated current.
3. Pay close attention to input / output polarity; reverse connection may damage the module and connected equipment.
4. Bare PCB versions should be installed in an enclosure or insulated from conductive surfaces to prevent short circuits.
5. The modules are designed for indoor use; protect from moisture, dust and corrosive environments.