Sophisticated circuit design and simulation method for switching power converters

Abstract

We introduce a method for designing switching power converter circuits with unified frequency characteristics independent of the input and output voltage settings and the load current change. Each circuit block is expressed as an equivalent small signal transfer function. Stability analysis of the total feedback loop was performed in both the continuous conduction mode (CCM) and discontinuous conduction mode (DCM). In addition, a system and circuit simulation method for switching power converters that enables fast and precise simulation of a transient response and frequency characteristics is introduced. Its features include acceleration of simulation time, and the ability to use a SPICE-like analog simulator and a behavioral simulator at the same time. We conclude that sophisticated circuit design and simulation of switching power converters are now available.