Transformers with external control signal It should be noted, however, that the LED strips can only be dimmed down to a certain percentage value, since the power required by the transformers is obtained from the dimmed AC voltage. If, for example, an existing dimmable lighting is to be converted to LED strips, in the simplest case only the LED transformers and the LED strips would have to be retrofitted. The LED strips are then connected directly to the LED transformers, so this method is suitable for using a single light colour. The dimmed AC voltage supplies the LED transformers, which are especially suitable for conventional dimming. Existing leading/ trailing edge dimmers can still be used for this purpose.
This form of dimming is particularly suitable if as little change as possible is to be made to the existing house installation. LED transformers with integrated PWM dimmer.Fixed voltage transformer with additional PWM dimmer.Transformers with external control signal.Overview of dimming concepts for LED strips In the following we describe the individual procedures in detail and present the structure of the different systems. But how do the individual dimming processes differ? There are several ways to dim LED strips. Or scroll down for more details on this page. It is controlled via the integrated DALI or DMX interface.ĭo not hesitate to contact our experts for LED strips. The advantage here is that only one component is required for dimming. The LED strips are also connected to the LED transformer. The LED transformer is supplied directly with the power supply (230V). These are LED transformers where the dimming level can be set directly via the DALI or DMX interface. Option 4 - LED transformers with integrated PWM dimmer Not only single-colour but also multi-colored (DUAL-White, RGB, RGBW) LED strips can be controlled. The desired degree of dimming can be set in many different ways (DALI, push-button, 1-10V, wireless, Bluetooth, WLAN with additional module). The additional PWM dimmer is installed between the power supply and the LED strips. This variant offers maximum flexibility and is also suitable for retrofitting in existing installations.
Option 3 - Fixed voltage transformer with additional PWM dimmer Casambi)ĭimmable transformers are particularly suitable if the LED strips have only one light colour. This solution is also often combined with radio modules(e.g. The principles are different and depend on the respective type. The output voltage can be changed or switched via a control voltage such as 1-10V, a potentiometer, a DALI signal or a PWM signal. Some manufacturers offer LED transformers with an additional control input. Option 2 - Transformer can be dimmed via external control cable This solution is often used if only the existing three lines (L, N, PE) are available in the house installation. The LED strips are then simply connected to the LED transformer. Here, the LED transformer is switched directly after the phase dimmer. Special dimmable LED transformers can be used with commercial leading/ trailing edge dimmers. Option 1 - The transformer itself is conventionally dimmable.
The operating devices must be aligned accordingly, depending on the various control options on the user side. The operating voltage is switched on or off for different periods ( Pulse Width Modulation). 12V or 24V is reduced in the output voltage. These convert the input voltage into an analog current for the LEDs, so that the following dimming variants are possible. It is done by current control, realized via other electronic components. Nothing happens under this threshold value, and only at a certain voltage level the brightness does suddenly increase. LEDs are electronic components, so-called semiconductors, and require a certain voltage to light up. While incandescent bulbs can be dimmed relatively easily by reducing the voltage, this is no longer that easy with LED strips.
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