Optimizing efficiency on conventional transformer based low power AC/DC standby power supplies

Nils Nielsen

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    Abstract

    This article describes the research results for simple and cheap methods to reduce the idle- and load-losses in very low power conventional transformer based power supplies intended for standby usage. In this case "very low power" means 50 Hz/230 V-AC to 5 V-DC@1 W. The efficiency is measured on two common power supply topologies designed for this power level. The two described topologies uses either a series (or linear) or a buck regulation approach. Common to the test power supplies is they either are using a standard cheap off-the-shelf transformer, or one, which are loss optimized by very simple means.
    Original languageEnglish
    Title of host publicationNineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04.
    PublisherIEEE
    Publication date2004
    ISBN (Print)0-7803-8269-2
    DOIs
    Publication statusPublished - 2004
    Event19th Annual IEEE Applied Power Electronics Conference and Exposition - Anaheim, United States
    Duration: 22 Feb 200426 Feb 2004
    Conference number: 19
    http://www.apec-conf.org/2004/APEC04_Home_Page.html

    Conference

    Conference19th Annual IEEE Applied Power Electronics Conference and Exposition
    Number19
    Country/TerritoryUnited States
    CityAnaheim
    Period22/02/200426/02/2004
    Internet address

    Bibliographical note

    Copyright: 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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