Comparative analysis of chopper voltage regulators with LC filter

Abstract

The chopper voltage regulators using a diode and an LC filter for output rectification and filtering are widely used in dc-to-dc conversion. Three possible configurations are 1) a series connection of the filter choke and switch with the load, 2) a series connection of the choke and the parallel connection of the switch with the load, and 3) a series connection of a chopper and the parallel connection of a choke with the load. Static characteristics of the regulators vary considerably among the aforementioned circuits. The output-to-input voltage ratios and the output characteristics of the circuits listed above are defined in the continuous and discontinuous current domains. An estimate and a comparison of the regulator performances are given.