300W 20A DC-DC Buck Converter Step-Down Module | LED Driver

300W 20A DC-DC Buck Converter Step-Down Voltage Module

Take precise control of your DC power with this high-performance 300W, 20A DC-DC Buck Converter Step-Down Module. Designed for electronics enthusiasts, engineers, and makers, this compact voltage regulator module delivers adjustable output voltage and current with up to 96% efficiency — making it an ideal solution for LED drivers, battery charging, DIY power supplies, computer projects, and more.

Made in Mainland China.

Key Features

• Wide Input Voltage Range: Accepts 6V–40V DC input (10V–40V recommended) for versatile application compatibility.
• Adjustable Output: Output voltage precisely tunable from 1.2V to 36V DC; output current up to 20A (15A recommended for sustained use).
• High Efficiency: Up to 96% conversion efficiency, measured at 20A converting 24V to 12V — minimizes energy waste and heat generation.
• Dual MOS Tube Design: Built with 75V/80A large-current dual MOS transistors for robust, reliable power handling.
• Low Ripple Output: High-frequency, low-resistance electrolytic capacitors on both input and output ensure stable, clean power (output ripple ≤50mV).
• Large-Current 30A Screw Terminals: Secure and convenient wiring for high-current applications.
• Dual Heat Sinks: Two integrated heat sinks enhance thermal dissipation, keeping the module running cool under load.
• Self-Recovery Short Circuit Protection: Built-in protection automatically recovers from brief short circuits (avoid prolonged short circuits).
• Enable (EN) Control: Low-voltage level shuts off output; suspension/high-voltage level enables output — great for controlled power switching.

Technical Specifications

Terminal Reference

• VO+ — Output positive
• VO− — Output negative
• +IN — Input positive
• −IN — Input negative
• CV — Output voltage adjustment potentiometer
• CC — Output current adjustment potentiometer
• EN — Enable pin (low = output off; high/floating = output on)

Usage Notes

When there is a large difference between input and output voltage, reduce the power and current to prevent excessive heat buildup. When input and output share a common ground, the CV potentiometer controls constant voltage output and the CC potentiometer controls constant current output.

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Frequently Asked Questions

Q: What is the maximum continuous output current for this DC-DC buck converter module?

A: The module supports a maximum output current of 20A, though for sustained, long-term operation a continuous current of 15A is recommended to ensure longevity and stable performance. Always ensure adequate airflow around the dual heat sinks during high-current use.

Q: Can I use this buck converter step-down module as an LED driver?

A: Yes. This module features both constant voltage (CV) and constant current (CC) adjustment modes, making it well-suited as an LED driver. Set the output voltage and current via the onboard potentiometers to match your LED string requirements for stable, flicker-free operation.

Q: What input voltage range does this step-down voltage module support?

A: The input voltage range is 6V to 40V DC, with 10V to 40V recommended for optimal performance. The output voltage is adjustable from 1.2V to 36V DC — just ensure the output voltage is always lower than the input voltage, as this is a step-down (buck) converter.

Q: Does this buck converter module have short circuit protection?

A: Yes, the module includes self-recovery short circuit protection. It will automatically recover after a brief short circuit event. Prolonged short circuits should be avoided, as they can damage the module over time.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.