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A High Efficiency Power Conversion Circuit with Wide ZVS Range for Large Screen PDP Sustaining Power Module  

Park Kyung-Hwa (한국과학기술원 인공위성연구센터)
Moon Gun-Woo (한국과학기술원 전자전산학과 전기및전자공학)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.10, no.6, 2005 , pp. 578-586 More about this Journal
Abstract
Recently, due to the launch of digital broadcasting service, the demand of Flat Panel Display (FPD) is sharply rising. Among them, the PDP is expected to be one of the most promising digital displays of next generation because of its large screen size, high resolution, thinness and board field of view. Meanwhile, the PDP uses ADS (Address Display-period Separation) scheme which divide one subfield into address and sustaining period to express the grey scale of images. Since the output of sustaining power module Is mostly used for sustaining period, the load of the sustaining power module can be considered as a pulsating load. Due to this particular load condition, if the wide ZVS range of the power switches is not guaranteed, the hard switching causes large amount of switching loss and serious thermal problem in power module. In this paper, a high efficiency power conversion circuit for 60' PDP sustaining power module which achieves wide ZVS range with the help of additional ZVS tank is proposed. According to the various gating methods, the different operations of the proposed converter are presented. And, to confirm the properties of the proposed converter, an experimental prototype of 900W power converter is constructed md tested. As a result, more than $92\%$ of high efficiency is obtained at $10\%$ load condition, and the ZVS operation is achieved from full load to $10\%$ load condition.
Keywords
Plasma Display Panel(PDP); Zero Voltage Switching(ZVS); PDP Sustaining Power Module;
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