Analysis and design of three-state controlled transition mode for a buck-boost converter with efficiency and stability enhancement

Author

Xiaohao Hu ; Mok, Philip K. T.

Author_Institution

Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong, China

fYear

2013

fDate

19-23 May 2013

Firstpage

697

Lastpage

700

Abstract

This paper presents the analysis and design of three-state controlled transition mode for buck-boost converter. By introducing an additional state D₂ to the transition mode, a significant efficiency improvement and output voltage ripple reduction are achieved due to the reduced average inductor current and inductor current ripple. Furthermore, the stability of the converter is enhanced according to the dynamic behavior analysis. A buck-boost converter operating in transition mode has been designed and implemented using AMS 0.35μm CMOS technology. Simulation results demonstrate that over 10% efficiency improvement can be achieved at heavy loading and the converter can be stabilized with a smaller compensation capacitor.

Keywords

CMOS digital integrated circuits; power convertors; AMS CMOS technology; buck-boost converter; compensation capacitor; inductor current ripple; output voltage ripple reduction; reduced average inductor current; size 0.35 mum; stability enhancement; three-state controlled transition mode design; Batteries; CMOS integrated circuits; Capacitors; Inductors; Simulation; Stability analysis; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2013 IEEE International Symposium on

Conference_Location

Beijing

ISSN

0271-4302

Print_ISBN

978-1-4673-5760-9

Type

conf

DOI

10.1109/ISCAS.2013.6571942

Filename

6571942