Title :
A reconfigurable seamless-transition DC-DC Converter With lossless current-sensing technique
Author :
Fenjie Yuan ; Xiaobo Wu ; Sheng Liu
Author_Institution :
Inst. of VLSI Design, Zhejiang Univ., Hangzhou, China
Abstract :
A reconfigurable DC-DC converter that provides both step-down and step-up functions is proposed to ensure a stable output voltage over full voltage range of battery in portable devices. The converter can automatically adjust itself into different modes, so as to enhance system efficiency. Moreover, seamless transition is achieved to reduce output ripple and improve line regulation. Additionally, a novel current-sensing technique is applied to realize lossless and accurate current sensing. The controller IC is designed and fabricated in 1.5-um BCD process. Test results verified the design target.
Keywords :
DC-DC power convertors; current-mode circuits; integrated circuit design; integrated circuit manufacture; BCD process; accurate current sensing; battery; controller IC; different modes; full voltage range; line regulation; lossless current sensing; lossless current-sensing technique; output ripple; portable devices; reconfigurable DC-DC converter; reconfigurable seamless-transition DC-DC converter; seamless transition; size 1.5 mum; stable output voltage; step-down functions; step-up functions; system efficiency; Batteries; Calibration; Discharges (electric); Inductors; Sensors; Topology; Tuning; lossless current-sensing; reconfigurable; seamless transition;
Conference_Titel :
Circuits and Systems (APCCAS), 2012 IEEE Asia Pacific Conference on
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4577-1728-4
DOI :
10.1109/APCCAS.2012.6418971
