Analysis of switched-capacitor DC-DC converters in soft-charging operation

Yutian Lei, Robert C N Pilawa-Podgurski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper formulates a formal analysis method for switched-capacitor (SC) dc-dc converters in soft-charging operation. Through soft-charging, the charging/discharging loss of a SC converter can be minimized or even eliminated by allowing the output voltage to vary to a greater extent. Usually a soft-charging SC converter is followed by a magnetic converter for ripple reduction and better regulation. For any given two-phase switched-capacitor topology, the proposed method can be used to determine whether soft-charging is at all possible and if so, the required capacitor sizes to achieve soft-charging. The proposed method also gives the resultant output voltage ripple due to soft-charging operation. A number of different topologies are analyzed, including Dickson, Series-parallel, Ladder, Fibonacci and Doubler configurations. The analysis gives insights regarding the expected improvement in performance when these topologies are cascaded by a magnetic converter. Through comparison to simulated results and existing work, the validity of the proposed method is confirmed.

Original languageEnglish (US)
Title of host publication2013 IEEE 14th Workshop on Control and Modeling for Power Electronics, COMPEL 2013
DOIs
StatePublished - 2013
Event2013 IEEE 14th Workshop on Control and Modeling for Power Electronics, COMPEL 2013 - Salt Lake City, UT, United States
Duration: Jun 23 2013Jun 26 2013

Other

Other2013 IEEE 14th Workshop on Control and Modeling for Power Electronics, COMPEL 2013
CountryUnited States
CitySalt Lake City, UT
Period6/23/136/26/13

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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