300W 20A DC-DC Buck Step-Down Converter | Constant Current Adjustable Voltage Module

300W 20A DC-DC Buck Step-Down Converter — Constant Current & Adjustable Voltage

Bring precision and reliability to your power regulation needs with this 300W DC-DC buck step-down converter. Featuring constant voltage and constant current (CV/CC) control with fully adjustable output, this compact module is perfect for battery charging, LED drivers, motor speed control, and a wide range of electronics projects. Whether you're powering a workbench supply or building a solar charge controller, this module delivers stable, efficient power every time.

Key Features

• Constant Voltage & Constant Current (CV/CC): Dual-mode control for precise, safe power delivery
• High Current Output: Up to 20A continuous — handles demanding loads with ease
• Max Power: 300W
• Fully Adjustable Output: Set your exact required voltage and current via onboard potentiometers
• High Efficiency: Up to 95% conversion efficiency — minimal heat generation
• Built-in Protection: Over-voltage, over-current, over-temperature, and short-circuit protection
• LED Display: Real-time voltage and current readout
• Compact Design: Easy to integrate into enclosures and DIY builds

Applications

• Battery charging (Li-ion, LiPo, lead-acid)
• LED driver and lighting control
• Motor speed regulation
• Solar charge controllers
• Bench power supply builds
• Robotics and embedded systems power regulation

Specifications

• Topology: Buck (Step-Down)
• Max Output Current: 20A
• Max Power: 300W
• Control Mode: CV/CC (Constant Voltage / Constant Current)
• Output Voltage: Adjustable (depends on input voltage)
• Efficiency: ≤95%
• Operating Temperature: -40°C to +85°C

Note: Input voltage must always be higher than the desired output voltage for buck (step-down) operation. Ensure adequate heat dissipation for sustained high-current use.