How to Use ldome6211: Examples, Pinouts, and Specs

The LDOME6211 is a high-performance LED driver designed to drive multiple LEDs in either series or parallel configurations. It features an adjustable current output, making it suitable for a wide range of LED applications. Additionally, the LDOME6211 includes built-in thermal protection to ensure safe and reliable operation under varying environmental conditions.

• LED lighting systems for residential, commercial, and industrial use
• Automotive LED lighting (e.g., headlights, taillights)
• Backlighting for LCD displays
• Architectural and decorative lighting
• Portable LED devices and flashlights

The LDOME6211 is engineered to deliver consistent performance while maintaining flexibility for various LED configurations. Below are the key technical specifications:

The LDOME6211 is available in an 8-pin SOIC package. Below is the pinout and description:

The LDOME6211 is straightforward to use in LED driver circuits. Follow the steps below to integrate it into your design:

• Ensure the input voltage (VIN) is within the range of 6V to 40V.
• Use a decoupling capacitor (e.g., 10µF) between VIN and GND to stabilize the input voltage.

• Connect a resistor (RSET) between the ISET pin and GND to set the desired output current.
• Use the formula below to calculate RSET: [ RSET (\Omega) = \frac{1.2V}{I_{OUT} (A)} ] For example, to set an output current of 500mA: [ RSET = \frac{1.2}{0.5} = 2.4 , \Omega ]

• Connect the LED string's positive terminal to the LED+ pin and the negative terminal to the LED- pin.
• Ensure the total forward voltage of the LED string is less than the input voltage.

• For PWM dimming, apply a PWM signal (0-100% duty cycle) to the DIM pin.
• For analog dimming, apply a DC voltage (0-2.5V) to the DIM pin.

• Ensure proper heat dissipation by using a heatsink or placing the component on a PCB with good thermal conductivity.
• Monitor the TEMP pin for thermal feedback if needed.

Below is an example of controlling the LDOME6211 using an Arduino UNO for PWM dimming:

// Example: Controlling LDOME6211 brightness with Arduino PWM
// Connect the DIM pin of LDOME6211 to Arduino pin 9

const int dimPin = 9; // PWM pin connected to DIM pin of LDOME6211

void setup() {
  pinMode(dimPin, OUTPUT); // Set pin 9 as an output
}

void loop() {
  // Gradually increase brightness
  for (int brightness = 0; brightness <= 255; brightness++) {
    analogWrite(dimPin, brightness); // Write PWM signal to DIM pin
    delay(10); // Small delay for smooth transition
  }

  // Gradually decrease brightness
  for (int brightness = 255; brightness >= 0; brightness--) {
    analogWrite(dimPin, brightness); // Write PWM signal to DIM pin
    delay(10); // Small delay for smooth transition
  }
}

• Use a properly rated resistor for RSET to avoid overheating.
• Ensure the input voltage is stable and within the specified range.
• Avoid exceeding the maximum output current to prevent damage to the LEDs or the driver.

1. Can I use the LDOME6211 for RGB LEDs?

   • Yes, but you will need one LDOME6211 driver per color channel (Red, Green, Blue).

2. What happens if the temperature exceeds 150°C?

   • The LDOME6211 will automatically shut down to protect itself from damage.

3. Can I use a potentiometer for dimming?

   • Yes, you can connect a potentiometer to the DIM pin for analog dimming.

4. Is the LDOME6211 suitable for battery-powered applications?

   • Yes, as long as the battery voltage is within the 6V-40V range.

By following this documentation, you can effectively integrate the LDOME6211 into your LED projects and ensure reliable performance.