A fixed-frequency auto-buck-boost SIMO DC-DC converter with duty-cycle redistribution and duty-predicted current control

Author

Yanqi Zheng ; Ho, Marco ; Ka Nang Leung ; Jianping Guo

Author_Institution

Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Hong Kong, China

fYear

2015

fDate

24-27 May 2015

Firstpage

225

Lastpage

228

Abstract

This paper presents a fixed-frequency auto-buck-boost SIMO dc-dc converter with duty-cycle redistribution and duty-predicted current control. The switching sequence of the power transistors in the power stage and the controller design achieve fixed-frequency operation with an optimized duty-cycle allocation, to deal with static and dynamic unbalanced loading conditions of different channels. The proposed control scheme reduces average inductor current for reducing conduction loss and cross regulation during load transients.

Keywords

DC-DC power convertors; electric current control; inductors; power system transients; power transistors; conduction loss; cross regulation; duty-cycle redistribution; duty-predicted current control; dynamic unbalanced loading condition; fixed-frequency auto-buck-boost SIMO DC-DC converter; inductor current; load transients; optimized duty-cycle allocation; power transistors; static unbalanced loading condition; switching sequence; Current control; DC-DC power converters; Inductors; Integrated circuits; Power generation; Switches; Voltage control; Auto buck-boost; SIMO dc-dc converter;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2015 IEEE International Symposium on

Conference_Location

Lisbon

Type

conf

DOI

10.1109/ISCAS.2015.7168611

Filename

7168611