標題: | Highly efficient tri-mode control of buck converters with load sensing technique |
作者: | Huang, Hong-Wei Chien, Chieh-Ching Chen, Ke-Horng Kuo, Sy-Yen 電控工程研究所 Institute of Electrical and Control Engineering |
公開日期: | 2006 |
摘要: | A highly efficient tri-mode buck converter with a novel load sensor circuit is proposed in this paper. The combination of pulse-width modulation (PWM), pulse-frequency modulation (PFM) and pulse-skipping circuit makes it efficient to operate in wide loading region. By using the novel load sensor, the buck converter can achieve high efficiency for the load range from 3mA to 400mA. This load sensor can automatically switch the modes according to the different load conditions. It changes the modulation methods from PWM mode to pulse-skipping modulation mode or to PFM mode. This tri-mode buck converter is fabricated by TSMC 0.35um. The efficiency above 90% is achieved for the load range about 90-400mA in PWM operation, and above 78 % attained for the load range about 3-50m.A in PFM mode. The insertion of the pulse skipping mode operation extends the high efficiency 90% of PWM operation for the load range from 90mA down to 50mA. |
URI: | http://hdl.handle.net/11536/135209 |
ISBN: | 978-0-7803-9716-3 |
ISSN: | 0275-9306 |
期刊: | 2006 IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-7 |
起始頁: | 2398 |
結束頁: | + |
顯示於類別: | 會議論文 |