How to Use 24/12v Buck: Examples, Pinouts, and Specs

The 24/12V Buck Converter is a DC-DC converter designed to step down voltage from 24V to 12V. This component is essential in power supply circuits where a stable 12V output is required from a 24V input. It is widely used in automotive applications, industrial equipment, and various electronic devices that operate on a 12V power supply.

1. Connect the Input Voltage:

   • Connect the VIN pin to the 24V power supply.
   • Connect the GND pin to the ground of the power supply.

2. Connect the Output Voltage:

   • Connect the VOUT pin to the load that requires a 12V power supply.
   • Ensure the load does not exceed the maximum output current of 5A.

3. Enable the Converter:

   • Connect the EN pin to a high logic level (e.g., 5V) to enable the converter.
   • If the EN pin is left floating or connected to ground, the converter will be disabled.

4. Feedback Pin (Optional):

   • The FB pin can be used for fine-tuning the output voltage. Connect it to a voltage divider network if precise voltage regulation is needed.

• Heat Dissipation: Ensure adequate cooling for the converter, especially when operating at high currents. Use heat sinks or active cooling if necessary.
• Input Voltage Range: Do not exceed the specified input voltage range (18V - 36V) to avoid damaging the converter.
• Output Filtering: Use appropriate capacitors at the output to filter out any noise and ensure a stable 12V output.
• Load Regulation: Ensure the load connected to the converter does not exceed the maximum output current of 5A to prevent overheating and potential damage.

1. No Output Voltage:

   • Check Connections: Ensure all connections are secure and correct.
   • Enable Pin: Verify that the EN pin is connected to a high logic level.
   • Input Voltage: Ensure the input voltage is within the specified range (18V - 36V).

2. Output Voltage Too Low or Unstable:

   • Load Regulation: Ensure the load does not exceed the maximum output current.
   • Output Filtering: Add or replace output capacitors to filter noise.
   • Feedback Pin: Check the voltage divider network connected to the FB pin for proper configuration.

3. Overheating:

   • Heat Dissipation: Improve cooling by adding heat sinks or active cooling.
   • Load Current: Reduce the load current if it exceeds the converter's capacity.

Q1: Can I use the 24/12V Buck Converter with an Arduino UNO? A1: Yes, you can use the 24/12V Buck Converter to power an Arduino UNO by providing a stable 12V supply. Connect the VOUT pin to the Arduino's VIN pin and the GND pin to the Arduino's GND pin.

Q2: How do I adjust the output voltage? A2: The output voltage can be adjusted by connecting a voltage divider network to the FB pin. Refer to the datasheet for the specific resistor values needed for your desired output voltage.

Q3: What is the efficiency of the converter? A3: The efficiency of the 24/12V Buck Converter can reach up to 95%, depending on the input voltage and load conditions.

Here is an example code to enable the 24/12V Buck Converter using an Arduino UNO:

// Define the pin connected to the EN pin of the Buck Converter
const int enablePin = 7;

void setup() {
  // Initialize the digital pin as an output
  pinMode(enablePin, OUTPUT);
  
  // Enable the Buck Converter by setting the pin HIGH
  digitalWrite(enablePin, HIGH);
}

void loop() {
  // The main loop can be used for other tasks
  // The Buck Converter will remain enabled
}

This code sets up pin 7 on the Arduino UNO as an output and sets it HIGH to enable the 24/12V Buck Converter. Ensure that the EN pin of the converter is connected to pin 7 of the Arduino.

This documentation provides a comprehensive guide to using the 24/12V Buck Converter, covering its technical specifications, usage instructions, troubleshooting tips, and example code for integration with an Arduino UNO. Whether you are a beginner or an experienced user, this guide will help you effectively utilize the 24/12V Buck Converter in your projects.