標題: | A 50 nW-to-10 mW Output Power Tri-Mode Digital Buck Converter With Self-Tracking Zero Current Detection for Photovoltaic Energy Harvesting |
作者: | Chen, Po-Hung Wu, Chung-Shiang Lin, Kai-Chun 交大名義發表 National Chiao Tung University |
關鍵字: | Asynchronous mode (AM);buck converter;digital pulsewidth modulation (DPWM);digital zero current detection;pulse-frequency modulation (PFM);tri-mode |
公開日期: | 二月-2016 |
摘要: | This paper presents a tri-mode digital buck converter in 0.18-mu m CMOS technology for photovoltaic energy harvesting. The on-chip gate-boosted digital pulsewidth modulation (DPWM) improves the conversion efficiency at heavy load conditions. Pulse-frequency modulation (PFM) along with digital self-tracking zero current detection is proposed to avoid reverse current at light load. The asynchronous mode (AM) operation further reduces the controller loss and improves the conversion efficiency at ultra-light load conditions. By applying DPWM, PFM, and AM at different load conditions, the proposed converter provides a maximum conversion efficiency of 92% with output power ranging from 50 nW to 10 mW. In addition, the proposed buck converter achieves more than 70% efficiency from 400 nW to 10 mW output power. |
URI: | http://dx.doi.org/10.1109/JSSC.2015.2506685 http://hdl.handle.net/11536/132908 |
ISSN: | 0018-9200 |
DOI: | 10.1109/JSSC.2015.2506685 |
期刊: | IEEE JOURNAL OF SOLID-STATE CIRCUITS |
Volume: | 51 |
Issue: | 2 |
起始頁: | 523 |
結束頁: | 532 |
顯示於類別: | 期刊論文 |