How to Use DC-DC Step Up SX1308 Adjustable Power Supply 28V 2A 1.2Mhz Power Booster Module: Examples, Pinouts, and Specs

The DC-DC Step Up SX1308 Adjustable Power Supply Module is a compact and efficient power booster designed to convert a lower DC voltage to a higher DC voltage. It is capable of outputting up to 28V with a maximum current of 2A, making it suitable for a wide range of applications. The module operates at a high switching frequency of 1.2MHz, ensuring minimal ripple and high efficiency.

• Powering devices requiring higher voltage from a lower voltage source (e.g., 3.7V to 12V).
• Battery-powered projects, such as lithium-ion or AA battery packs.
• LED strips, displays, and other high-voltage components.
• DIY electronics and prototyping.
• Arduino and microcontroller-based projects requiring adjustable voltage.

Below are the key technical details of the SX1308 module:

The SX1308 module has the following pin layout:

1. Connect the Input Voltage:

   • Connect the positive terminal of your DC power source (e.g., battery) to the VIN pin.
   • Connect the negative terminal of the power source to the GND pin.

2. Connect the Output Voltage:

   • Connect the VOUT pin to the load (e.g., LED strip, motor, or other devices).
   • Ensure the load's voltage and current requirements are within the module's output range.

3. Adjust the Output Voltage:

   • Use a small screwdriver to turn the onboard potentiometer clockwise to increase the output voltage or counterclockwise to decrease it.
   • Measure the output voltage using a multimeter to ensure it matches your desired value.

4. Power On:

   • Once all connections are secure, power on the input source. The module will boost the input voltage to the desired output level.

• Input Voltage Range: Ensure the input voltage is within the 2V to 24V range. Exceeding this range may damage the module.
• Output Voltage Limit: Do not exceed the maximum output voltage of 28V or the maximum current of 2A.
• Heat Dissipation: At higher loads, the module may generate heat. Consider adding a heatsink or ensuring proper ventilation.
• Load Compatibility: Verify that the connected load does not draw more current than the module's maximum rating.
• Polarity: Double-check the polarity of the input and output connections to avoid damage.

The SX1308 module can be used to power an Arduino UNO from a lower voltage source, such as a 3.7V lithium-ion battery. Below is an example circuit and code:

• Connect the battery's positive terminal to the VIN pin of the SX1308.
• Connect the battery's negative terminal to the GND pin of the SX1308.
• Adjust the output voltage to 5V using the potentiometer.
• Connect the VOUT pin of the SX1308 to the 5V pin of the Arduino UNO.
• Connect the GND pin of the SX1308 to the GND pin of the Arduino UNO.

// Example code to blink an LED using Arduino UNO powered by the SX1308 module

const int ledPin = 13; // Pin connected to the onboard LED

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

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

1. No Output Voltage:

   • Cause: Incorrect wiring or loose connections.
   • Solution: Double-check all connections, ensuring proper polarity and secure contacts.

2. Output Voltage Not Adjustable:

   • Cause: Faulty potentiometer or incorrect adjustment.
   • Solution: Turn the potentiometer slowly and measure the output voltage with a multimeter.

3. Module Overheating:

   • Cause: Excessive load or insufficient ventilation.
   • Solution: Reduce the load current or add a heatsink to the module.

4. Load Not Powering On:

   • Cause: Output voltage too low or incompatible load.
   • Solution: Verify the load's voltage and current requirements and adjust the output voltage accordingly.

Q: Can the SX1308 module step down voltage?
A: No, the SX1308 is a step-up (boost) converter and cannot step down voltage. Use a buck converter for step-down applications.

Q: What is the efficiency of the module?
A: The module has an efficiency of up to 93%, depending on the input voltage, output voltage, and load.

Q: Can I use the SX1308 to power a Raspberry Pi?
A: While the SX1308 can provide 5V output, it may not handle the high current requirements of a Raspberry Pi. Use a module with a higher current rating for such applications.

Q: Is the module protected against reverse polarity?
A: No, the SX1308 does not have reverse polarity protection. Ensure correct polarity to avoid damage.