How to Use DC DC converter: Examples, Pinouts, and Specs

A DC-DC converter is an essential component in modern electronics, enabling devices to operate at different voltage levels from a given power supply. The Arceli DC-DC converter is designed to provide a reliable and efficient voltage conversion solution, suitable for a wide range of applications including battery-powered devices, power regulation for embedded systems, and adjustable power supplies for prototyping.

Common applications include:

• Mobile and portable devices
• Embedded systems
• Power supply units
• Automotive electronics
• Renewable energy systems

• Input Voltage Range: 2.5V to 15V DC
• Output Voltage Range: 0.5V to 30V DC (adjustable)
• Maximum Output Current: 3A (with heat sink)
• Conversion Efficiency: Up to 95%
• Switching Frequency: 150kHz
• Operating Temperature: -40°C to +85°C

1. Connecting Input Power:

   • Connect the positive terminal of your DC power source to the VIN pin.
   • Connect the negative terminal to the GND pin.

2. Setting Output Voltage:

   • Adjust the output voltage by turning the potentiometer connected to the ADJ pin.
   • Use a multimeter to measure the VOUT pin and set it to the desired voltage level.

3. Enabling the Converter:

   • The EN pin can be left floating for normal operation.
   • To switch the converter on/off via a microcontroller, connect the EN pin to a digital output pin.

4. Connecting the Load:

   • Connect the load to the VOUT and GND pins.
   • Ensure the load does not exceed the maximum current rating of 3A.

• Always verify input and output voltages with a multimeter before connecting sensitive loads.
• Use a heat sink for applications drawing currents close to the maximum rating.
• Place a capacitor at the output to smooth out voltage ripples if necessary.
• Avoid placing the converter in high-temperature environments to prevent overheating.

// Example code to enable and disable the Arceli DC-DC converter using an Arduino UNO

const int enablePin = 7; // Connect the EN pin of the converter to digital pin 7

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

void loop() {
  digitalWrite(enablePin, HIGH); // Turn on the DC-DC converter
  delay(5000); // Keep it on for 5 seconds
  
  digitalWrite(enablePin, LOW); // Turn off the DC-DC converter
  delay(5000); // Keep it off for 5 seconds
}

• Output voltage is too low or too high: Ensure the ADJ pin is correctly adjusted.
• Converter is overheating: Check if the current draw is within the limit and if a heat sink is necessary.
• No output voltage: Verify connections, input voltage, and if the EN pin is enabled.

• If the output voltage does not stabilize, add a capacitor to the output to filter noise.
• Use thicker wires for higher currents to minimize voltage drops.
• If the converter does not turn on, check the EN pin connection and the input voltage.

Q: Can I use this converter to charge batteries? A: Yes, but ensure the output voltage is appropriate for the battery and that current limits are observed.

Q: Is it possible to synchronize multiple converters? A: This model does not support synchronization. You would need a converter with a sync pin for that feature.

Q: How do I know if I need a heat sink? A: If the converter is running hot or if you're drawing current near the 3A limit, a heat sink is recommended.

For further assistance, please contact Arceli support or refer to the detailed datasheet provided with the component.