A single-inductor dual-output pseudo-DCM/CCM buck and boost converter with adaptive DC current compensation

Author

Jia, Jingbin ; Ka Nang Leung

Author_Institution

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

fYear

2009

fDate

24-27 May 2009

Firstpage

2641

Lastpage

2644

Abstract

The proposed single-inductor dual-output (SIDO) buck-boost DC-DC converter operating in pseudo-DCM/CCM mode can adaptively increase the pseudo DC inductor current to improve the transient load response and the load driving capability in terms of the load change. A maximum duty cycle limiter is used to remove cross regulation and determine the compensation current on the set pseudo DC current. A buck sub-converter and a boost sub-converter are combined with an optimized number of switches. Based on the operating mode and an integrated error amplifier design, the off-chip compensation network is removed. In addition, the transfer functions of the power stage of SIDO DC-DC converter operating in the pseudo-DCM/CCM mode is also presented.

Keywords

DC-DC power convertors; inductors; limiters; transfer functions; transient response; adaptive DC current compensation; buck-boost DC-DC converter; integrated error amplifier design; maximum duty cycle limiter; off-chip compensation network; pseudo-DCM-CCM buck converter; set pseudo DC current; single-inductor dual-output converter; switches; transfer function; transient load response; Costs; DC-DC power converters; Inductors; Power supplies; Space vector pulse width modulation; Switches; Transfer functions; Transient response; Virtual colonoscopy; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on

Conference_Location

Taipei

Print_ISBN

978-1-4244-3827-3

Electronic_ISBN

978-1-4244-3828-0

Type

conf

DOI

10.1109/ISCAS.2009.5118344

Filename

5118344