Design Switch Mode Power Supply (SMPS) Using Flyback Topology

Raja Nor Azrin , Raja Yunus (2009) Design Switch Mode Power Supply (SMPS) Using Flyback Topology. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

The purpose of this project is to design a Switch Mode Power Supply (SMPS) using a tlyback topology. A switched-mode power supply can be defined as an electronic power supply unit (PSU) that incorporates a switching regulator, which is an internal control circuit that switches power transistors (such as BJTs, l'vlOSFETs, IGBTs and etc) rapidly on and off in order to stabilize the output voltage or current. Switching regulators are used as replacements for the linear regulators \Vhen higher efficiency, smaller size or lighter weights are required. The selection of type of the switching regulator is depends on the applications and loads. but in this project a tlyback converter topology is used. The Flyback converter can be developed as an extension of the Buck-Boost conve11er that replaces the inductor by a transformer. This project has been elaborated in detail about all the designing process of SMPS using flyback converter topology, starting from determination of parameter of PSU until the developing of designed SMPS hardware. P-Spice software is used to simulate and analyze all the designing processes. Hardvvare of the SMPS has been built based on the designed circuit and simulation result. The output of the built hardware is expected approximately match vvith the simulation result.

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