The purpose of this paper is to explore the problem of designing proper sliding-mode controllers to regulate the output voltage of the dc-to-dc quantum series-parallel resonant converter. A control-oriented dynamic model, which appropriately describes the large-signal behavior of the power circuit by average state variables, is first developed. Using input–output feedback linearization, a control design methodology is then presented, which leads to a family of sliding surfaces that make the output voltage behave following a particular large-signal linear dynamics. Among these surfaces, the final configuration is selected taking into account control circuit simplicity as the basic premise. Besides exhibiting the
absence of output-voltage errors in steady state, the control solution leads to robust operation with respect to parameter variations and external disturbances. Simulations and experimental results are reported to validate the expected features of the proposed control solution.