標題: Adaptive Window Control (AWC) Technique for Hysteresis DC-DC Buck Converters With Improved Light and Heavy Load Performance
作者: Huang, Han-Hsiang
Chen, Chi-Lin
Chen, Ke-Horng
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: Adaptive window control;hysteresis converter;output ripple
公開日期: 1-五月-2009
摘要: This paper presents a new adaptive window control (AWC) technique to adjust the hysteresis window to reduce the output ripple at heavy loads and keep the switching frequency higher than the acoustic frequency at light loads. Therefore, the driving capability and the power conversion efficiency of the hysteresis converter are improved at heavy loads. Besides, a new class AB current sensing circuit is also proposed to provide fast and accurate current sensing signal for achieving fast hysteresis window adjustment. Experimental results show that the proposed AWC technique not only reduces the output ripple smaller than 12 mV when load current is 800 mA to improve the power conversion efficiency but also keeps the switching frequency higher than acoustic frequency at light loads to avoid undesired noise.
URI: http://dx.doi.org/10.1109/FPEL.2009.2014687
http://hdl.handle.net/11536/7293
ISSN: 0885-8993
DOI: 10.1109/FPEL.2009.2014687
期刊: IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume: 24
Issue: 5-6
起始頁: 1607
結束頁: 1617
顯示於類別:期刊論文