Discrete-event switching control for buck converter based on the FPGA

This paper presents a discrete-event switching control of DC–DC converters which belong to a particular class of hybrid systems. Taking advantage of the energetical properties of these converters, Lyapunov function is proposed. This function, which is systematically deduced from the physical model, allows the creation of various stabilizing switching sequences. From a theoretical point of view, asymptotic stability can be obtained. The digital control is implemented by FPGA system, with additional A/D peripherals. Experimental results for digitally controlled synchronous buck converter show the effectiveness of the proposed approach.