DC-DC Buck Convrter 10A/100W 12A Max DC 5-40V to 1.2-36V Step Down Module

Adjustable Step-Down Voltage Converter

The DC-DC Buck Converter 10A/100W is designed to reduce a higher DC voltage to a lower adjustable voltage. For example, a suitable input source can be stepped down to power circuits requiring lower voltages.

The output can be adjusted from approximately 1.2V to 36V, giving the module flexibility for different electronic power requirements.

Wide 5–40V Input Range

The converter accepts DC input voltages from approximately 5V to 40V. This makes it suitable for use with various DC power sources, including appropriately rated adapters, battery systems, and other DC supplies.

The output voltage must remain below the input voltage, as this is a buck/step-down converter and cannot increase the input voltage.

High-Current Output

The module is designed for high-current applications, with a commonly specified 10A output capability and approximately 12A maximum current under appropriate conditions.

Actual continuous output current depends heavily on:

• Input/output voltage
• Output power
• Ambient temperature
• PCB cooling
• Airflow
• Load duration
• Wiring and connectors

For sustained high-current operation, additional cooling may be required.

Adjustable Output Voltage

An onboard potentiometer allows the output voltage to be adjusted according to the requirements of the connected circuit.

Before connecting sensitive electronics, measure the output with a reliable multimeter and adjust it to the required voltage.

Up to Approximately 100W

The converter is commonly marketed as a 100W buck converter. At high output currents, thermal management becomes particularly important. The actual usable continuous power depends on the voltage difference, efficiency, cooling, and operating environment.

Suitable Applications

The module can be used for:

• DC power supply projects
• Arduino and microcontroller systems
• ESP32 projects
• LED lighting
• Battery-powered electronics
• Robotics
• Motor-control power systems
• DIY bench power supplies
• Industrial control prototypes
• Communication equipment
• Automotive electronics projects
• Electronic testing and prototyping

Efficient DC Voltage Conversion

Unlike a linear regulator, a switching buck converter can provide substantially higher efficiency when reducing voltage, which can help reduce power loss and heat generation.

However, the converter itself still generates heat, particularly when operating at high current or high power.

Important: This module is a step-down converter only. The output voltage cannot be set higher than the input voltage. Do not exceed the specified input voltage, output current, or power limits. Always verify the output voltage before connecting the load.