Design and implementation of fpga controlled dc-dc buck converter

SUMMARYIn this thesis, a DC-DC buck converter is designed and implemented that its output voltage is stable and not affected by load variations. With this aim, Field Programmable Gate Arrays (FPGA) is chosen for controller and PWM signal generator due to the programming advantages and parallel operation. The XC3S500E-4FG320 is used as FPGA. With this FPGA, PWM signal which has 24.4kHz and adjustable duty cycle is generated and applied to IGBT drive circuit. A Very High Speed Integrated Circuit Hardware Description Language (VHDL) is used for programming the FPGA. In this way, both ADC module in Spartan-3E Starter kit is controlled and digital control is provided by taking current and voltage information.Key Words: DC-DC buck converter, PWM, FPGA, VHDL