Comparison of State-of-the-Art Digital Control and Analogue Control for High Bandwidth Point of Load Converters

Lars Tønnes Jakobsen, Henrik Schneider, Michael Andreas E. Andersen

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Abstract

The purpose of this paper is to present a comparison of state-of-the-art digital and analogue control for a Buck converter with synchronous rectification. The digital control scheme is based on a digital self-oscillating modulator that allows the sampling frequency to be higher than the switching frequency of the converter. Voltage mode control is used in both the analogue and digital control schemes. The experimental results show that it is possible to design a digitally controlled Buck converter that has the same performance as can be achieved using commercially available analogue control ICs. The performance of the analogue system can however be increased by using a separate operational amplifier as error amplifier. Thus analogue control is still the best option if high control bandwidth and fast transient response to load steps are important design parameters.
Original languageEnglish
Title of host publicationApplied Power Electronics Conference
Volume2
PublisherIEEE
Publication date2008
Pages1440-1445
ISBN (Print)978-1-4244-1874-9
Publication statusPublished - 2008
Event23rd Applied Power Electronics Conference - Austin, TX, United States
Duration: 24 Feb 200828 Feb 2008
Conference number: 23
http://www.apec-conf.org/2008/images/PDF/2008/apec08_preliminaryprogram_webcopy.pdf

Conference

Conference23rd Applied Power Electronics Conference
Number23
CountryUnited States
CityAustin, TX
Period24/02/200828/02/2008
Internet address

Cite this

Jakobsen, L. T., Schneider, H., & Andersen, M. A. E. (2008). Comparison of State-of-the-Art Digital Control and Analogue Control for High Bandwidth Point of Load Converters. In Applied Power Electronics Conference (Vol. 2, pp. 1440-1445). IEEE. http://www.apec-conf.org