Digital controller design for point-of-load DC-DC converters with variable switching frequency
2011; Institution of Engineering and Technology; Volume: 47; Issue: 6 Linguagem: Inglês
10.1049/el.2010.3500
ISSN1350-911X
AutoresRobert Priewasser, Matteo Agostinelli, Stefano Marsili, Mario Huemer,
Tópico(s)Advanced Battery Technologies Research
ResumoPresented is a digital controller to regulate a point-of-load Buck converter. The regulator varies both the duty cycle, as well as the switching frequency, by controlling not only the on-time, but also the off-time of the switching period. The multi-loop digital controller, which achieves a tight voltage regulation and an excellent dynamic performance, is presented and its effectiveness is proven by means of experimental results. The controller architecture, together with an analogue-to-digital converter, has been integrated in a 0.13 µm CMOS technology.
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