Influence of Mosfet Model Form on Characteristics of the Boost Converter

In the paper boost converter characteristics at the steady state obtained from SPICE analysis with the use of selected kinds of MOSFET models of various complexity and accuracy are compared. The dependencies of the converter output voltage, the watt-hour efficiency and the MOSFET inner temperature on the frequency and the duty cycle of the MOSFET control signal as well as the converter load resistance are considered. The correctness of the calculation results was verified experimentally. The duration time of the analyses corresponding to all the considered models of the MOS transistor are compared, too. Vpliv modela MOSFET tranzistorja na karakteristike ojačitvenega pretvornika Kjučne besede: V čLanku primerjamo statične karakteristike pretvornika pridobljene s SPICE simulacijo z uporabo izbranih MOSFET modelov različnih kompleksnosti in natančnosti. Opišemo odvisnost izhodnih napetosti, učinkovitost ter MOSFET temperaturo od frekvence kontrolnega signala in bremenske upornost. Pravilnost dobljenih rezultatov smo preverili tudi eksperimentalno. Primerjali smo tudi čase simulacije v odvisnosti od uporabljenih modelov. Izvleček: MOS tranzistorji, pretvorniki, modeliranje