Designing control loop for DC-to-DC converters loaded with unknown AC dynamics

This paper presents a method for designing the control loop for DC-to-DC power converters when uncertainties exist in the AC characteristics of the converter´s load. In the proposed method, a converter is initially considered as a stand-alone module feeding a current sink load and the control loop of the converter is then designed in a way that maximizes the robustness of the converter´s closed-loop performance against the unknown AC dynamics of a potential load. As a result, the proposed control design method can provide the predictable closed-loop performance for a converter when it is loaded with an actual load whose AC characteristics are unknown in advance.