A high-accuracy and high-efficiency on-chip current sensing for current-mode control CMOS DC-DC buck converter

Kuo Hsing Cheng, Chia Wei Su, Hsin Hsin Ko

研究成果: 書貢獻/報告類型會議論文篇章同行評審

35 引文 斯高帕斯(Scopus)

摘要

In this paper, a high accuracy, high efficiency, and wide current sensing range on chip current sensing technique is presented. The proposed current sensing circuit uses simple switch technique to achieve high accuracy. The current sensing circuit has no OP amplifier so that it would not reduce the power efficiency. The test chip is fabricated in TSMC 0.18μm 1P6M 3.3V CMOS process. The measurement results show that the buck converter with on-chip current sensing circuit can operate from 700KHz to 1.4MHz with supply voltage from 2.5 to 5 V for lithium ion battery application. The accuracy of proposed current sensing circuit is higher than 89.8% for load current from 50 to 500mA and for temperature from 0 to 100°C. The power efficiency of the buck converter is up to 91.2%.

原文???core.languages.en_GB???
主出版物標題Proceedings of the 15th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2008
頁面458-461
頁數4
DOIs
出版狀態已出版 - 2008
事件15th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2008 - St. Julian's, Malta
持續時間: 31 8月 20083 9月 2008

出版系列

名字Proceedings of the 15th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2008

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???event.eventtypes.event.conference???15th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2008
國家/地區Malta
城市St. Julian's
期間31/08/083/09/08

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