Title :
A design-oriented mathematical model for DC/DC buck converters with PFM control
Author :
Facen, Alessio ; Tonelli, Matteo ; Boni, Andrea
Author_Institution :
Silis s.r.l., Parma
fDate :
Aug. 31 2008-Sept. 3 2008
Abstract :
A design-oriented mathematical model for integrated DC/DC buck converters is presented in this paper. The analysis takes into account the main conduction power loss due to the switches channel resistance in on-state and, starting from the efficiency specification and other constraints, sets the guidelines for the sizing of the output power stage of the DC/DC converter. The model also considers the design of the driver stages, calculates the switching power loss and adjusts the efficiency to obtain the effective value. A CMOS DC/DC converter with Pulse Frequency Modulation (PFM) control in Discontinuous Conduction Mode (DCM) has been designed following such a criteria, validating the accuracy of the model in different loading conditions.
Keywords :
CMOS integrated circuits; DC-DC power convertors; pulse frequency modulation; CMOS DC/DC converter; DC/DC buck converters; PFM control; conduction power loss; design-oriented mathematical model; discontinuous conduction mode; pulse frequency modulation control; Buck converters; DC-DC power converters; Frequency modulation; Guidelines; Load modeling; Mathematical model; Power generation; Pulse modulation; Semiconductor device modeling; Switches;
Conference_Titel :
Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on
Conference_Location :
St. Julien´s
Print_ISBN :
978-1-4244-2181-7
Electronic_ISBN :
978-1-4244-2182-4
DOI :
10.1109/ICECS.2008.4674888
