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Design and Implementation of Modern Digital Controller for DC-DC Converters

S.Chithra, V. Devi Maheswaran

Several techniques are available for implementing DC-DC converters using digital controllers Among these FPGA (Field Programmable Gate Array) based implementation provides various advantages in terms of speed, flexibility, low power usage, reduced equipment sizing and massive parallelism. The traditional methods allow fault diagnosis only after the final implementation which leads to extra cost and loss of design time. This paper proposes a smart method of FPGA based implementation of DC-DC Buck Boost converter control system using Matlab and ModelSim. The control algorithm and coding is done by means of Verilog code and implemented on an Altera FPGA Board. The FPGA takes control of the entire system and decides whether to increase or decrease the voltage depending on the application. Load is applied and the efficiency is checked at variable load conditions.