Device for varying the intensity of the light in luminous charges

摘要

The device has a power stage (1) including a control unit for controlling a microcontroller (2). The microcontroller is connected between a set of main phases, and a light load (4). A switching power supply (3) is connected to a downstream stage for rectifying or smoothing voltage between a line and the light load. A detecting unit is arranged for detecting fall of voltage of the switching power supply. The detecting unit is arranged with a comparator (8) for comparing predetermined threshold voltage with voltage at an output of a rectifying or smoothing stage. An independent claim is also included for a method for operating a device for varying intensity of light in luminous loads.