ISCAS 2002

IEEE International Symposium

on Circuits and Systems

Sunday, 26 May 2002 - Wednesday, 29 May 2002

Scottsdale Princess Resort

Scottsdale, Arizona

ISCAS 2002 Theme: Circuits and Systems for Ubiquitous Computing


Switched capacitor circuit based power converters
Adrian Ioinovici, Holon Academic Institute
Sunday May 26, 2002, 8:30 AM - 11:45 AM


One of the main orientations in power electronics in the last decade has been the development of switching-mode converters without inductors and transformers.Light weight,small size and high power density are the result of using only switches and capacitors in the power stage.The request of miniaturization of the power supply was similar with the process that lead to the development of active filters for replacing the old ,bulky,passive filters.The switched-capacitor (SC) converters serve as ideal power supplies for mobile electronic systems (cellular phones,personal digital assistants,military equipment,etc).Due to their large conversion ration,the SC converters are able to realize step-down of the voltage to 3 V or even a smaller supply voltage for integrated circuits,or steep step-up of the voltage for automotive industry or internet services in the telecom industry.

The use of a switched-capacitor circuit for processing energy seemed doomed to failure :it is known that charging a capacitor from zero is achieved at a 50 % efficiency.Controlling the energy processing through a switched-capacitor circuit (a task done previously by inductors) was another challenge.Ten years of research were needed to overcome these dilemmas and to develop high-efficient switched-capacitor controlled energy-processing circuits.

Topics in this half-day course will include the presentation of the theory of processing energy through a switched-capacitor circuit,step-down,step-up and inverting structures of SC DC-DC converters,SC DC-AC inverters,their design,transient and steady-state characteristics,a discussion of the efficiency and ripple in the output voltage,commercially-available SC converters,soft-switching converters with SC circuit,bi-directional SC converters and continuous-input current SC converters.

About the Presenter:

Adrian Ioinovici published about 100 papers in the field of power electronics:analysis ,simulation and stability-oriented design of switching-mode circuits,soft-switching and switched-capacitor electronic converters.He has served as an Associate-Editor for Power Electronics of IEEE Transactions on CAS - Part I and Journal of Circuits,Systems and Computers,Guest-Co-Editor of a special issue of Trans on CAS dedicated to switching circuits,Chair of the Technical Committee on Power Systems and Power Electronics of the CAS Society.

The 2002 IEEE International Symposium on Circuits and Systems is sponsored by:
and supported by:
Texas Instruments
Date     Announcement
    6 March     Preliminary conference schedule available. See "Program" area of website.
    29 January     Session information for accepted papers is now available.
    19 January     The list of accepted papers has been posted. Please see the Paper Submission page for the link.
Tutorial Proposal Deadline         Friday, 21 September 2001
Paper Submission Deadline         Monday, 29 October 2001
Paper Acceptance Notification         Friday, 18 January 2002
Author Registration Deadline         Friday, 1 March 2002
Final Submission Deadline         Friday, 1 March 2002
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