Computer aided design tool for PWM converters

A user friendly program which integrates schematic capture, simulation, analysis and measurement of PWM DC-to-DC power converters in one package is described. It provides several alternatives to obtaining the frequency response of PWM and current programmed power converters, which include a model that accounts for the effect of sampling in current programmed converters, and models that provide exact small-signal responses for both PWM and current programmed converters. Design aspects of the package are also discussed. The analysis part of the program is designed using the Model-View-Controller framework for which it is well suited. The program is written in C++ which supports object-oriented programming. A multiple models approach is used to identify and define the appropriate objects for data management, user interface and program control.