Currently, LEDs are recognized as one of the most efficient light sources. Dimming possibilities of LEDs allows achieving additional power savings and better illumination quality while using in smart lighting systems. Conventional voltage regulator based dimming techniques are least convenient for fluent current regulation from the point of view of controllability. This article discusses the possibility of constructing a dimmable LED driver based on the controllable current driver with inherent abilities of current regulation. During the study 30W laboratory prototype of proposed LED driver was built and tested on the LED load (15 connected in series LEDs, 700mA). The results of experiments confirm the working capacity and better controllability abilities of the proposed LED driver, but further study on operation stability improvement is necessary.