Analysis of a New Fifth-Order Boost Converter

In this paper a new boost fifth-order point of load dc-dc converter is proposed. A digital controller is then designed to ensure load voltage regulation against expected disturbances. The proposed converter is capable of giving a higher voltage gain in comparison to other fourth and fifth-order boost topologies reported in literature. Through steady-state analysis various design expressions for the energy storage elements are obtained. Discrete-time models of the converter are derived, which are then used in digital controller design. A 25 Watt, 12 to 48 V, 100 kHz prototype converter is considered for simulation and experimentation. Simulations and measurements are in close agreement and thus verified the effectiveness of the proposed converter.