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