300W 20A Adjustable DC-DC Step Down Buck Converter Voltage Regulator Power Supply Module

The 300W 20A Adjustable DC-DC Buck Converter is a high-power step-down voltage regulator designed to convert a higher DC input voltage into a lower, adjustable DC output.

With adjustable Constant Voltage (CV) and Constant Current (CC) control, this module provides flexible power regulation for electronics projects, LED driver circuits, battery charging applications and DIY power supply systems.

Supporting a DC input range of 6V–40V and an adjustable output range of approximately 1.2V–36V, this converter is designed for applications requiring adjustable voltage and current control.

Its high-current design, heatsinks and screw-terminal connections make it suitable for demanding power-electronics projects when operated within its electrical and thermal limits.

Key Features

• 300W Maximum Power: Designed for high-power DC step-down applications.

• 20A Maximum Output Current: Supports high-current power applications.

• Adjustable Output Voltage: Approximately 1.2V–36V DC.

• Wide Input Range: 6V–40V DC input.

• CV/CC Regulation: Constant Voltage and Constant Current adjustment.

• Step-Down Conversion: Reduces DC voltage; does not boost voltage.

• Heat Dissipation: Heatsink-equipped design for thermal management.

• Screw Terminal Connections: Convenient input and output wiring.

Technical Specifications

Important: Maximum current and maximum power are not necessarily available simultaneously at every input/output voltage. Actual operating limits depend on cooling, voltage difference and module version.

Applications

• Adjustable DC laboratory power supplies

• High-power LED driver projects

• Battery charging systems with suitable charging settings

• DC motor power systems

• Robotics and automation projects

• Solar power DC regulation

• DIY electronics and experimental circuits

• Industrial DC power applications

How to Use

1. Connect the DC power source to the input terminals.

2. Observe the correct positive and negative polarity.

3. Connect a digital multimeter to the output terminals.

4. Adjust the CV control to obtain the required output voltage.

5. Adjust the CC control according to the required current limit and load.

6. Verify the output before connecting your electronic device.

7. Provide sufficient cooling during high-power operation.

Important Precautions

• This is a step-down converter, not a step-up converter.

• Never exceed the specified input voltage.

• Check the output voltage before connecting sensitive equipment.

• Do not reverse input polarity.

• Avoid prolonged short-circuit operation.

• Use suitable wiring for high-current applications.

• Provide additional airflow when required.

• Do not operate beyond the module's thermal limits.

Package Includes

• 1 × 300W 20A Adjustable DC-DC Buck Converter Module

Looking for other voltage regulation solutions? Explore our XL4016 9A Adjustable Buck Converter, XL4015 5A Buck Converter and LM2596 DC-DC Buck Converter for different power requirements.

Why Choose This Module?

If your project requires adjustable DC voltage and current regulation, this 300W buck converter offers a flexible solution for high-current electronics applications. Its CV/CC adjustment makes it useful for experimental power supplies, LED systems and appropriately configured charging circuits.