300W DC-DC Buck Converter

The 300W DC-DC Buck Converter is a high-efficiency, synchronous rectification module designed for demanding power applications. Leveraging advanced synchronous rectification technology, this converter uses low-resistance power MOSFETs to minimize rectification losses, significantly boosting conversion efficiency (up to 96%) and reducing heat generation. This makes it ideal for high-power LED driving, lithium and other battery charging, solar and wind energy systems, and more.

With a wide input range of 12–35V DC and a continuously adjustable output voltage of 1.2–32V DC, the module supports both constant current (CC) and constant voltage (CV) modes. Output current is adjustable up to 20A (recommended ≤15A for long-term use), with a current limiting range of .2–20A. The module features a compact design, robust terminal block wiring, and instant short-circuit protection for safe operation.

Technical Specifications

• Module Type: Synchronous rectification, non-isolated, CC/CV buck converter
• Input Voltage: DC 12–35V
• Output Voltage: 1.2–32V DC (continuously adjustable)
• Output Current: Up to 20A (≤15A recommended for continuous use)
• Current Limiting Range: .2–20A (adjustable)
• Minimum Voltage Difference: 3V
• Working Frequency: 150kHz
• Conversion Efficiency: Up to 96% (varies with load and environment)
• Output Ripple: ~50mV (20M bandwidth, at 24V input)
• Working Temperature: –10°C to +75°C
• Module Size: 60 × 53 × 30 mm
• Net Weight: ~68g
• Output Short Circuit Protection: Instantaneous
• Input Reverse Protection: None
• Output Anti-Backflow: None (external diode required for inductive loads)
• Wiring: Terminal block
• Potentiometer Adjustment: CV (voltage), CC (current)
• Enable Pin: Low level disables output, high level enables output

Package Includes

• 1 × 300W DC-DC Buck Converter Module
• 1 × User Manual

For integration guides, technical support, and compatible accessories, visit our Power Electronics Collection. Explore more DC-DC converters and power solutions in our Electronics Range.

1. Adjust the CV potentiometer and set the output voltage to the desired value according to your load requirements.

2. Set the CC potentiometer counterclockwise for about 30 turns (i.e. set the output current to the minimum), connect the LED, and adjust the CC potentiometer to the desired current. Used for battery charging, after discharging the battery, connect it to the output and adjust the CC to the current you need. (When used for charging, be sure to adjust it with the discharged battery, because the more battery remaining, the smaller the charging current.)

OUT+: Output positive

OUT -: Negative output

+IN: Enter positive

-IN: Enter negative number

CV: Output voltage regulation

CC: Output current regulation

EN: Enable, low level shutdown output; Pause, high voltage level is valid