DC-DC Converter Linearized Model

Abstract

Although recent versions of Cadence PSpice contain functions that can derive regulation loop bode plots from a real time switching model, it is still very attractive and necessary for larger system analysis to have an accurate and precise linearized model of DC/DC converter stages, which covers both continuous and discontinuous conduction mode. It is also important that such a model provide the same transfer function as the simulated real time DC/DC converter, including Right Half Plane Zero (RHPZ) effects of boost family converters and load dependent inductance. A novel model, that fulfill these requirements has been developed and is presented in detail in this paper.