A pulse-width-modulation based sliding mode controller for buck converters

This paper presents the design and analysis of a pulse-width-modulation based sliding mode voltage controller for buck converters from a circuit design perspective. A practical design approach which aims at systematizing the procedure for the selection of the control parameters is introduced. Additionally, a simple analog form of the controller for practical realization is provided. It is found that this controller adopts a structure similar to the conventional pulse-width-modulated voltage mode controller. Simulation and experimental results show that the response of the converter agrees with the theoretical design.