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

fYear

2008

fDate

Aug. 31 2008-Sept. 3 2008

Firstpage

454

Lastpage

457

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICECS.2008.4674888

Filename

4674888