Behavioral large signal averaged model for DC/DC switching power converters

A general behavioral large signal modeling technique is presented in this paper. The model is applicable to DC/DC switching power converters working in both continuous (CCM) and discontinuous (DCM) conduction modes. The model is based on two PWM switch sub-models commutating between them as a consequence of the operating conditions. In the modeling technique, emphasis is made in the discontinuous conduction mode and in the determination of the instants to switch between the continuous and discontinuous conduction mode sub-models. The model is used in a multilevel simulator where behavioral descriptions are permitted. Results are obtained and compared with device level simulations. These results show good accuracy and significant reduction in the simulation time