Driver pro výkonový LED modul

Abstract

The first part of this thesis is focused on physical, constructional and commercial properties of LED diodes. In the next chapter of theoretic part there is further elaborated the problems of LED current control with an example principled solution. First, there are defined types of current sources used to power LED, after that followed introduction current control methods for applications with more LED and in the end of this part there is elaborated the analog and digital PWM dimming. The second part of thesis discusses a concept and realization of power LED driver. Individual parts of concept and realization are described in a logical sequence. There are also recorded and described waveform obtained during control measurements. In conclusion of the thesis is summary of results of the theoretical and measurement part and also suggest of continuation the work.