How to Use Tobsun 120W 24v-12v Stepdown converter: Examples, Pinouts, and Specs

The Tobsun 120W 24V-12V Stepdown Converter is a high-performance DC-DC step-down voltage regulator designed to convert a 24V input voltage to a stable 12V output voltage. With a maximum power output of 120W, this converter is ideal for powering 12V devices from a 24V power source. Its compact design and robust construction make it suitable for a wide range of applications, including automotive systems, industrial equipment, and renewable energy setups.

• Powering 12V automotive accessories from a 24V truck or bus battery.
• Supplying 12V to industrial control systems from a 24V power source.
• Integrating into solar power systems to step down voltage for 12V devices.
• Providing stable 12V power for LED lighting, communication devices, and other electronics.

The following table outlines the key technical details of the Tobsun 120W 24V-12V Stepdown Converter:

The Tobsun 120W Stepdown Converter has four connection terminals. The table below describes each terminal:

1. Connect the Input Terminals:

   • Connect the VIN+ terminal to the positive terminal of your 24V DC power source.
   • Connect the VIN- terminal to the negative terminal (ground) of your 24V DC power source.

2. Connect the Output Terminals:

   • Connect the VOUT+ terminal to the positive terminal of your 12V load or device.
   • Connect the VOUT- terminal to the negative terminal (ground) of your 12V load or device.

3. Verify Connections:

   • Double-check all connections to ensure proper polarity and secure wiring.
   • Ensure the input voltage is within the specified range (18V to 32V DC).

4. Power On:

   • Turn on the 24V power source. The converter will automatically regulate the input voltage to provide a stable 12V output.

• Heat Dissipation: The converter may generate heat during operation, especially at high power levels. Ensure adequate ventilation or attach a heatsink if necessary.
• Load Compatibility: Verify that the connected load does not exceed the maximum output current of 10A or the maximum power of 120W.
• Protection Features: The converter includes built-in protection for overload, overvoltage, and short circuits. However, avoid intentional misuse to prevent damage.
• Wiring: Use appropriately rated wires for both input and output connections to handle the current without overheating.

The Tobsun 120W Stepdown Converter can be used to power an Arduino UNO from a 24V power source. Below is an example wiring setup and Arduino code:

1. Connect the VIN+ and VIN- terminals of the converter to the 24V power source.
2. Connect the VOUT+ and VOUT- terminals of the converter to the Arduino UNO's VIN and GND pins, respectively.

// Example code to blink an LED connected to pin 13 of the Arduino UNO
// Ensure the Arduino is powered via the Tobsun 120W Stepdown Converter

void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output pin
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for 1 second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for 1 second
}

1. No Output Voltage:

   • Cause: Incorrect wiring or loose connections.
   • Solution: Verify all connections and ensure proper polarity.

2. Overheating:

   • Cause: Insufficient ventilation or excessive load.
   • Solution: Reduce the load or improve airflow around the converter.

3. Output Voltage Fluctuations:

   • Cause: Input voltage outside the specified range or unstable power source.
   • Solution: Ensure the input voltage is within 18V to 32V DC and use a stable power source.

4. Converter Shuts Down:

   • Cause: Overload, short circuit, or overvoltage protection triggered.
   • Solution: Check for short circuits, reduce the load, or ensure the input voltage is within range.

• Q: Can this converter be used with a 12V battery as the input?

  • A: No, the input voltage must be between 18V and 32V DC for proper operation.

• Q: Is the output voltage adjustable?

  • A: No, the output voltage is fixed at 12V DC.

• Q: Can I use this converter to power multiple devices simultaneously?

  • A: Yes, as long as the total power consumption does not exceed 120W or 10A.

• Q: Does the converter require an external fuse?

  • A: While the converter has built-in protection, adding an external fuse is recommended for additional safety.