How to Use VHM-314: Examples, Pinouts, and Specs

The VHM-314 is a versatile voltage regulator module designed to convert a higher input voltage to a lower, stable output voltage. This module is essential for providing a consistent power supply to electronic circuits that require a specific operating voltage. Common applications include:

• Powering microcontrollers like Arduino or Raspberry Pi when the input voltage is above their operating voltage.
• Providing a stable voltage source for sensors, motors, and other electronic components.
• Use in battery-powered applications where voltage regulation is necessary to maintain consistent performance.

• Input Voltage Range: 4.5V to 28V
• Output Voltage: 3.3V (fixed)
• Output Current: Up to 3A (with heat sink)
• Conversion Efficiency: Up to 92%
• Switching Frequency: 1.5MHz
• Operating Temperature: -40°C to +85°C

1. Connecting Power: Connect the input voltage (4.5V to 28V) to the VIN pin and ground to the GND pin.
2. Output Voltage: Connect your load to the VOUT pin and ground. Ensure that the load does not exceed the maximum output current rating.
3. Heat Management: For currents above 1A, it is recommended to attach a heat sink to the module to dissipate heat and prevent overheating.

• Always verify input voltage before connecting to the module to avoid damage.
• Do not exceed the maximum input voltage and output current specifications.
• Use decoupling capacitors close to the power input and output if your application is sensitive to power supply noise.
• Ensure proper ventilation and heat sinking if operating near the maximum current rating for extended periods.

• Output voltage is unstable or too low: Check if the input voltage is within the specified range and if the load is not drawing more current than the module can provide.
• Module is overheating: Ensure that the current draw is within limits and that a heat sink is properly installed if necessary.

Q: Can I adjust the output voltage of the VHM-314? A: No, the VHM-314 provides a fixed 3.3V output.

Q: Is it possible to use the VHM-314 with an Arduino UNO? A: Yes, the VHM-314 can be used to power an Arduino UNO or any other 3.3V logic level device.

Q: What is the maximum input voltage for the VHM-314? A: The maximum input voltage is 28V. Exceeding this voltage may damage the module.

// Example code to demonstrate how to power an Arduino UNO with the VHM-314

void setup() {
  // Initialize the serial communication at 9600 baud rate
  Serial.begin(9600);
}

void loop() {
  // Send a message to the Serial Monitor
  Serial.println("Arduino UNO is powered by VHM-314");
  delay(1000); // Wait for 1 second
}

// Note: Connect the VHM-314 VOUT pin to the Arduino UNO 3.3V pin,
// GND to GND, and VIN to a 4.5V to 28V power source.

Remember to ensure that the VHM-314's output current is sufficient for your Arduino UNO and any other connected components.