Design of multiphase synchronous buck converter

The development of today?s micro-electronics technology has brought about the necessity of renewal of the improvements in existing power electronic converter systems. It has become crucial and prior to design and produce power circuits in smaller dimension, with low output voltage and high current capacity which enable the electronic devices used in daily life and being developed high technology appliances in the scope of military to operate by limited power capacity and supply.The main aim of this thesis is to design and realize the power circuit with a low output voltage and high output current capacity by using the multi-phase synchronous buck converter architecture. For this purpose, a two-phase and a four-phase multiphase synchronous buck converters having 12V input voltage and 3.3V, 30A output capacity are designed, produced and tested.Designed two-phase and four-phase synchronous buck converter power circuits are simulated by using Matlab/Simulink program. Printed circuit boards (PCB) are drawn by using Proteus ARES 7 program and are examined elaborately by using the CAM350 Pro 6 program.At the tests performed on two-phase and four-phase synchronous buck converter power circuits; change of total inductance current ripple (output current ripple), efficiency and cost are examined with respect to number of phases. Additionally, by realizing CE101 and CE102 electromagnetic compatibility tests according to MIL-STD-461E military standards, the effects of high switching frequency are observed. Test and simulation results are compared.