Digitally Controlled Self-oscillating Resonant Converters: Modeling Issues

The paper presents a novel bilinear discrete time model with pre-warping Tustin ´s rule for the digitally controlled self-oscillating resonant converters. The model employs the sampled data technique to provide a model that is a means for accurate stability design and transient response prediction. The proposed method defines the crossover frequency of the converter, which is a critical parameter to design a fast transient response converter. The model provides the first step to model the high frequency digitally controlled resonant converters for the microprocessor applications. The model design guidelines are illustrated. Simulink and preliminary prototype results validate the derived model