Olegs Tetervenoks

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The paper presents synthesis and comparison of several drivers of original topologies for LED dimming. The work is based on the hypothesis that the direct current control, in contrast to indirect voltage control, is very useful in LED applications where luminous flux is almost proportional to LED's current. In order to confirm or disprove this hypothesis,(More)
The high power LED driver based on non-inverting buck-boost converter is considered in this paper. The special regulation approach of this converter is described in order to simplify the control strategy. Thus, the implementation of this control strategy in microcontroller based closed loop regulation system allows to increase number of regulation steps (to(More)
Amplitude mode LEDs light regulation is most functional when LEDs are supplied from current fed buck drivers, which practical implementation is conjunction of non-inverting buck-boost circuit, extra coil and specific control methods. This report experimentally evaluates the efficiency of driver's versions making focus on their losses and possible electric(More)
The shortage of energy resources as well as the increasing price of electrical power leads to new studies in the field of efficiency improvement for all kinds of electric devices. Lighting systems are not exception. Smart lighting systems are capable to reduce electrical power consumption significantly by the regulation of the illumination level in(More)
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