Spice-modelling and the analysis of the self-excited push-pull dc-dc converter with self-heating taken into account

The paper concerns the electrothermal analysis of the self-excited push-pull dc-dc converter with the SPICE program. The new electrothermal model of a pulse transformer, which constitutes the basic component element of the considered converter, is proposed. The semiconductor devices are described with the use of hybrid electrothermal models. The measurements and electrothermal calculations of the characteristics of the considered converter with the use of the models proposed in the paper are performed. A good agreement between the calculations and measurements results is achieved.