AN APPROACH TO DESIGN OF DC-DC BOOST CONVERTER WITH DIGITAL CONTROL

This paper deals with the design of digital controller for DC-DC boost converter. This controller is a combination of a generalized minimum variance control and one-step-delayed disturbance estimator. The generalized minimum variance control algorithm design is based on the input/output converter model. It should provide the output voltage stability, whereas the disturbance estimator increases the robustness and the steady-state accuracy of converter in the presence of input voltage and load resistance variations. With these control techniques, the converter can achieve better power efficiency. Finally, the effectiveness of the proposed design procedure is verified by a digital simulation, showing satisfactory DC-DC boost converter performances.