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

fYear

2012

fDate

2-5 Dec. 2012

Firstpage

61

Lastpage

64

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (APCCAS), 2012 IEEE Asia Pacific Conference on

Conference_Location

Kaohsiung

Print_ISBN

978-1-4577-1728-4

Type

conf

DOI

10.1109/APCCAS.2012.6418971

Filename

6418971