Adaptive pulse skipping and adaptive compensation capacitance techniques in current-mode buck-boost DC-DC converters for fast transient response

Andreas Ehrhart, Bernhard Wicht, Moris Lin, Yung Sheng Huang, Yu Huei Lee, Ke-Horng Chen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

To have a good power management especially for portable devices it is necessary to use the whole battery voltage range (e.g. of Lithium-ion batteries), to provide a fixed output voltage of for example 3V. In this paper a fast transient (FT) current mode buck-boost DC-DC converter with adaptive pulse skipping (APS) and adaptive compensation capacitance (ACC) is proposed. The buck-boost DC-DC converter can work in three different modes, buck, boost and buck-boost. It cannot only use the whole battery range from 2.7V to 4.2V, but also has a good response time with a low voltage undershoot/overshoot at load current variations, due to the APS and the ACC. With the proposed fast transient techniques, improvements could be made in the voltage overshoot/undershoot and the response time. In boost mode, the improvements, in the voltage undershoot and the response time from light-to-heavy load (100mA to 500mA), are 16.7% and 58.8%, respectively. In buck mode, 40% and 49.2% and in buck-boost mode, it is 10% and 63.9%. In case of a load variation from heavy-to-light load (500mA to 100mA), similar results could be reached in every operation mode. The proposed DC-DC buck-boost converter realizes a good power management and a good transient performance to generate a stable supply voltage for portable devices. Its working frequency is 1MHz.

Original languageEnglish
Title of host publication2013 IEEE 10th International Conference on Power Electronics and Drive Systems, PEDS 2013
Pages373-378
Number of pages6
DOIs
StatePublished - 1 Aug 2013
Event2013 IEEE 10th International Conference on Power Electronics and Drive Systems, PEDS 2013 - Kitakyushu, Japan
Duration: 22 Apr 201325 Apr 2013

Publication series

NameProceedings of the International Conference on Power Electronics and Drive Systems

Conference

Conference2013 IEEE 10th International Conference on Power Electronics and Drive Systems, PEDS 2013
CountryJapan
CityKitakyushu
Period22/04/1325/04/13

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