How to Use Matek BEC20S-PRO: Examples, Pinouts, and Specs

The Matek BEC20S-PRO is a high-efficiency voltage regulator designed to provide a stable output voltage of either 5V or 12V from a higher input voltage. With a maximum output current of 20A, this component is ideal for powering RC devices, drones, FPV systems, and other electronics requiring a reliable power source. Its compact design and robust performance make it a popular choice for hobbyists and professionals alike.

• Powering RC devices such as drones, planes, and cars
• Supplying stable voltage to FPV cameras, video transmitters, and receivers
• Providing regulated power to microcontrollers and other sensitive electronics
• High-current applications requiring efficient voltage conversion

The following table outlines the key technical details of the Matek BEC20S-PRO:

The Matek BEC20S-PRO has the following pin configuration:

1. Connect the Input Voltage:

   • Connect the VIN+ pin to the positive terminal of your power source (e.g., battery).
   • Connect the VIN- pin to the ground terminal of your power source.

2. Set the Output Voltage:

   • Use the onboard jumper to select the desired output voltage:
     • Place the jumper on the 5V position for a 5V output.
     • Place the jumper on the 12V position for a 12V output.

3. Connect the Load:

   • Connect the VOUT+ pin to the positive terminal of your load (e.g., FPV camera, microcontroller).
   • Connect the VOUT- pin to the ground terminal of your load.

4. Power On:

   • Once all connections are secure, power on the input source. The BEC20S-PRO will regulate the voltage and provide a stable output.

• Ensure the input voltage is within the specified range (9V to 60V). Exceeding this range may damage the component.
• Verify the output voltage setting (5V or 12V) before connecting sensitive devices.
• Avoid exceeding the maximum output current of 20A to prevent overheating or triggering protection features.
• Use appropriate wire gauges for high-current applications to minimize voltage drops and heat generation.
• Mount the BEC20S-PRO in a well-ventilated area to ensure proper heat dissipation.

To power an Arduino UNO with the Matek BEC20S-PRO, follow these steps:

1. Set the output voltage to 5V using the jumper.
2. Connect the VIN+ and VIN- pins to a 3S LiPo battery (11.1V nominal).
3. Connect the VOUT+ pin to the Arduino's 5V pin and the VOUT- pin to the Arduino's GND pin.

Here is an example Arduino sketch to blink an LED while powered by the BEC20S-PRO:

// Blink an LED connected to pin 13
// Ensure the Matek BEC20S-PRO is providing 5V to the Arduino UNO

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

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: Input voltage is not connected or is outside the specified range.
   • Solution: Verify the input voltage is between 9V and 60V and check all connections.

2. Output Voltage is Incorrect:

   • Cause: Jumper is not set correctly.
   • Solution: Ensure the jumper is placed in the correct position for 5V or 12V output.

3. Overheating:

   • Cause: Excessive current draw or poor ventilation.
   • Solution: Reduce the load current or improve airflow around the component.

4. Short Circuit Protection Triggered:

   • Cause: Output terminals are shorted.
   • Solution: Disconnect the power source, check for shorts, and reconnect after resolving the issue.

Q: Can I use the Matek BEC20S-PRO with a 6S LiPo battery?
A: Yes, the BEC20S-PRO supports input voltages up to 60V, so a 6S LiPo (22.2V nominal) is compatible.

Q: Is the output voltage adjustable beyond 5V or 12V?
A: No, the output voltage is fixed at either 5V or 12V, selectable via the jumper.

Q: Can I power multiple devices simultaneously?
A: Yes, as long as the total current draw does not exceed 20A.

Q: Does the BEC20S-PRO have reverse polarity protection?
A: No, ensure correct polarity when connecting the input voltage to avoid damage.

This concludes the documentation for the Matek BEC20S-PRO.