Higher efficiency of DC-to-DC converters can be achieved by the reduction of conduction and switching losses in the power switches (transistors and diodes) as well as core and copper losses in the magnetic components. These problems have been addressed recently in the new patented TESLAconverter, with losses that are significantly lower than those of conventional switching converters.
The basic version of the TESLAconverter comprises of two primary side MOSFET switches, two secondary side diodes, one integrated magnetic structure, and three capacitors. The two primary side MOSFET switches operate in an out-of-phase manner.
The output diode CR1 operates in synchronism with the input switch S1 while the complementary output diode CR2 operates in synchronism with the complementary input switch S1’, which is just the opposite of the switch timing of the output diode rectifiers in the conventional forward converter with a voltage clamp. This specific switch timing enables that the DC-flux in the new Integrated Magnetics structure can be eliminated or significantly reduced for any operating condition!
The TESLAconverter exhibits an almost constant ultra high efficiency over a wide voltage and power range, which allows to design conveters with extremely high power densities. Exceptionally high efficiencies exceeding 95% even at output voltages of 5 volts and below, are achieved as a result of this innovative topology, which employs a new principle of lossless switching. Very high power density results from both the smaller new integrated magnetics structure called DC Transformer and the significantly reduced power losses. Real products of TESLAco's licensees confirm the extraordinary features of the new TESLAconverter technology.
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