300 W DC-DC Buck Converter 20A (ARD08E)

This high-power DC-DC step-down (buck) converter is designed to reduce a higher DC input voltage to a lower, adjustable DC output voltage.

The module features adjustable voltage and current settings, making it suitable for power supplies, battery charging applications (with appropriate settings), LED systems and DIY electronics projects.

Key Features

• Wide DC input voltage range from 6V to 40V.

• Adjustable output voltage from 1.2V to 36V.

• Maximum output current of 20A (15A recommended).

• High conversion efficiency of up to 95–96% under specified conditions.

• Dual 75V/80A MOSFET design.

• Low-ripple output for stable performance.

• Large 30A screw terminals for easy wiring.

• Two aluminium heatsinks for improved heat dissipation.

• Constant Voltage (CV) and Constant Current (CC) operation.

• Self-recovering short-circuit protection (not suitable for prolonged short circuits).

Technical Specifications

Wiring & Connections

• VO+: Positive output terminal (+)

• VO-: Negative output terminal (−)

• +IN: Positive DC input terminal (+)

• -IN: Negative DC input terminal (−)

• CV: Adjusts the output voltage (Constant Voltage)

• CC: Adjusts the output current limit (Constant Current)

• EN: Enable control

  • Low voltage level: Output disabled (OFF)

  • High voltage level: Output enabled (ON)

  • Left unconnected (floating): Output enabled (ON)

Important Notes

• This is a step-down converter only. The output voltage must be lower than the input voltage.

• The maximum output voltage depends on the available input voltage.

• Additional cooling may be required when operating at higher currents.

• Reduce the output current when there is a large difference between input and output voltage.

• Do not leave the output short-circuited for extended periods.

• Always check the output voltage before connecting electronic devices.

• Ensure correct input and output polarity before switching on.