Reconfigurable Pulse-Width Modulation Control of DC-DC Converter

Abstract

In this paper, digital control of a DC-DC switching power converter using a Field Programmable Gate Array (FPGA) is presented. The FPGA system development is carried out using Very High-Speed Integrated Circuit Hardware Description Language (VHDL), whose parameters can be easily changed as per user requirement by editing the predefined generics in the VHDL code. The digital controller comprises of Xilinx Analog to Digital Converter(XADC) and Xilinx Microblaze soft processor core. The digital controller developed using the FPGA development board has been tested on classical synchronous buck and boost converter operating in continuous conduction mode (CCM).