How to Use MT3608: Examples, Pinouts, and Specs

The MT3608 is a highly efficient, step-up (boost) DC-DC converter module designed to increase the voltage from a lower voltage source to a higher voltage as required by the load. It is commonly used in battery-powered devices, portable electronics, and power supply designs where a higher voltage level is needed from a lower voltage source.

• Powering circuits that require a voltage higher than the battery supply
• Portable electronic devices
• Driving LED arrays
• Small power amplifiers
• Microcontroller projects, including Arduino-based designs

• Input Voltage Range: 2V to 24V
• Maximum Output Voltage: 28V (adjustable via onboard potentiometer)
• Maximum Switching Current: 2A
• Efficiency: Up to 93%
• Switching Frequency: 1.2MHz
• Operating Temperature: -40°C to +85°C

1. Connect the input voltage (2V to 24V) to the VIN and GND pins.
2. Adjust the onboard potentiometer to set the desired output voltage. Use a multimeter to measure the output voltage while adjusting.
3. Connect the load to the VOUT and GND pins.
4. Ensure that the load does not exceed the maximum current rating of 2A.

• Always start with the potentiometer turned fully counterclockwise to set the lowest output voltage before applying power.
• Gradually increase the output voltage to the desired level while monitoring with a multimeter.
• Do not exceed the input voltage range or the maximum output current to prevent damage to the module.
• Provide adequate cooling if the module is expected to operate near its maximum ratings.
• Use capacitors at the input and output for better voltage regulation and to reduce noise.

• Output voltage does not reach the desired level: Ensure that the input voltage is sufficient and that the potentiometer is adjusted correctly.
• Module overheats: Check if the current draw is within the module's limit and improve cooling if necessary.
• No output voltage: Verify connections and input voltage, and ensure that the module is not damaged.

• If the output voltage is unstable or too low, check the input voltage and the load to ensure they are within specifications.
• If the module is overheating, reduce the load or improve heat dissipation.
• In case of no output, recheck all connections, ensure the input voltage is present, and that the potentiometer is adjusted properly.

// This example demonstrates how to use the MT3608 with an Arduino to power an LED strip.

const int ledPin = 9; // Connect the LED strip to pin 9 (PWM capable)

void setup() {
  pinMode(ledPin, OUTPUT);
  // Start with the LED strip off
  analogWrite(ledPin, 0);
}

void loop() {
  // Gradually turn on the LED strip
  for (int i = 0; i <= 255; i++) {
    analogWrite(ledPin, i);
    delay(10); // Short delay to see the dimming effect
  }
  // Gradually turn off the LED strip
  for (int i = 255; i >= 0; i--) {
    analogWrite(ledPin, i);
    delay(10); // Short delay to see the dimming effect
  }
}

Note: The above code assumes that the MT3608 module is used to step up the voltage to a level suitable for driving an LED strip and that the Arduino is used to control the brightness via PWM. Always ensure that the output voltage from the MT3608 is appropriate for the LED strip being used.