Design of low power multiple output power supply for embedded systems

Abstract

This paper presents the design of multiple output power supply from AC power supply that is used as an input to this power supply system. As an Embedded system works on different voltage levels because the sub modules used in any embedded system required different voltage levels as per their specifications, so power supply proposed in this paper produces +15V, -15V, +5V, -5V, +3.3V, +5V Isolated voltage levels. The input for this power supply is 220 Volt AC supply. This AC supply is converted into DC supply of 48 volts but this range can be 36-72 volts. This power supply is capable of providing approximate 41W output power with 85% efficiency. The power supply design topology selected for this paper is flyback converter because flyback converter is an efficient method for generating multiple output voltage levels. This power supply is designed by utilizing low cost, highly efficient discrete components. This supply designed here can be used for almost all applications due to its versatile range of constant output voltage levels.