Title :
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
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;
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
DOI :
10.1109/ISCAS.2009.5118344
