How to Use ELG-75-36A: Examples, Pinouts, and Specs

The ELG-75-36A, manufactured by Meanwell, is a 75W LED driver designed to provide a constant voltage output of 36V. This versatile driver is suitable for both indoor and outdoor lighting applications, offering high efficiency, reliability, and robust protection features. It is commonly used in LED lighting systems, signage, architectural lighting, and other applications requiring a stable 36V power source.

• LED strip lighting
• Outdoor architectural lighting
• Indoor commercial lighting
• Signage and display systems
• Industrial lighting systems

The ELG-75-36A is engineered to meet the demands of modern lighting systems. Below are its key technical specifications:

The ELG-75-36A features a simple wiring interface for input and output connections. Below is the pin configuration:

1. Input Connection: Connect the AC-L (brown) and AC-N (blue) wires to the live and neutral terminals of your AC power source. Ensure the input voltage is within the range of 100-305V AC.
2. Output Connection: Connect the V+ (red) and V- (black) wires to the positive and negative terminals of your LED load. Ensure the load operates at 36V DC and does not exceed 75W.
3. Grounding: Connect the green/yellow wire to the earth ground for safety.
4. Dimming Adjustment: Use the built-in potentiometer to adjust the output current for dimming purposes, if required.

• Ensure proper ventilation around the driver to prevent overheating.
• Do not exceed the maximum output power of 75W to avoid damage.
• Use waterproof connectors if the driver is installed outdoors.
• Verify the polarity of the output connections to prevent damage to the LED load.

While the ELG-75-36A is not directly connected to an Arduino UNO, it can power LED strips controlled by the Arduino. Below is an example of how to use the ELG-75-36A with an Arduino to control LED brightness via PWM:

1. Connect the ELG-75-36A output (V+ and V-) to the LED strip.
2. Use an N-channel MOSFET (e.g., IRF540N) to control the LED strip via the Arduino's PWM pin.
3. Connect the MOSFET's source to the ELG-75-36A V- and the drain to the LED strip's negative terminal.
4. Connect the MOSFET's gate to an Arduino PWM pin (e.g., pin 9) through a 220-ohm resistor.

// Example code to control LED brightness using PWM
// Ensure the ELG-75-36A is properly connected to the LED strip

const int pwmPin = 9; // PWM pin connected to the MOSFET gate

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

void loop() {
  // Gradually increase brightness
  for (int brightness = 0; brightness <= 255; brightness++) {
    analogWrite(pwmPin, brightness); // Set PWM duty cycle
    delay(10); // Small delay for smooth transition
  }

  // Gradually decrease brightness
  for (int brightness = 255; brightness >= 0; brightness--) {
    analogWrite(pwmPin, brightness); // Set PWM duty cycle
    delay(10); // Small delay for smooth transition
  }
}

1. Can the ELG-75-36A be used outdoors?

   • Yes, it has an IP67 rating, making it suitable for outdoor use.

2. What happens if the load exceeds 75W?

   • The driver will activate over-current protection to prevent damage.

3. Can I use the ELG-75-36A with a 12V LED strip?

   • No, the driver outputs a constant 36V, which is incompatible with 12V LED strips.

4. Is the driver dimmable via PWM?

   • The ELG-75-36A supports dimming via its built-in potentiometer. For external PWM dimming, additional circuitry is required.

By following this documentation, users can effectively integrate the ELG-75-36A into their lighting systems while ensuring safe and reliable operation.