EL2564-0010 - Usable LEDs ("Common Cathode")

The terminal outputs the LED supply voltage PWM modulated. The current is not limited by the terminal. When selecting the LED or the LED strip, it is therefore important to ensure that appropriate series resistors are present or that some other current limiting device is connected upstream.

The terminal is particularly suitable for implementing multicolor lighting. Several differently colored LED chips are installed in one housing. Standard combinations are for example red, green and blue (RGB). For this combination, the terminal would need three channels, one for each color. But there are also RGB LEDs with an additional chip for white, the so-called RGBW (Red, Green, Blue, White) LEDs. All four channels of the terminal are then needed.

Besides the colored LEDs, there are also so-called CCT (correlated color temperature) LEDs. These are also known as "dual white" or "tunable white". Both warm white and cold white LEDs are interconnected to achieve a specific color temperature by mixing the two shades of white. This function can be used, for example, to simulate the course of the light color in the interior to the sunlight. This means that two LED chips (warm white, cold white) are installed in one housing. Therefore two channels of the terminal are required per CCT LED or CCT LED strip.

RGB+CCT describes a combination of the described RGB and the CCT LEDs. Five LED chips are combined in one housing (red, green, blue, warm white, cold white). RGB+CCT LEDs need two terminals for control, because for the five different colors also five channels are needed.

EL2564-0010 - Connection of "Common Cathode" LEDs

The EL2564-0010, on the other hand, can be used for LEDs with a common ground connection (cathode) (so-called "common cathode" LEDs).

The setup with common cathode type RGB strips on the EL2564-0010 is shown in the following figure.

Further information on the LEDs can be found in chapter Basics of LED technology.