Analysis of Switched Mode Power Supply (SMPS) with Energy Saving Requirement

Abstract

Nowadays, the Switched-Mode Power Supply (SMPS) plays an important role in the consumer power market. With its small size, it can be found everywhere from mobile phone chargers to Plasma TVs or even in compact dics players or laptops. It is used to convert the electricity from one voltage/current to the other voltage/current. Typically, the SMPS solution consists of several electronic components: a switching controller, a power MOSFET, a power transformer, diodes, resistors, capacitors and inductors. High power switch mode power supplies are vital parts of the modern devices such as telecommunication switches, aircrafts and even robots. Many new applications of energy system devices have been developed to save energy, improve the controllability and stability of industrial processes, and reduce the weight, volume and cost of consumer devices. This project aims to minimize the total power consumption (<1W) in an idle state (standby mode). This will be evaluated through a number of options in switchmode technology. Thus, prototype switchmode power supply solutions will be compared to the existing power supply solutions found in domestic electronic equipments, and the analysis results successfully helped confirm the operation of the prototype device and investigate its uncompromised performance. In addition, it provides useful information for next generation product development.