Dynamic analysis of two-phase switched-capacitor DC-DC converters

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

18 Scopus Citations
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Author(s)

  • Oi-Ying Wong
  • Hei Wong
  • Wing-Shan Tam
  • Chi-Wah Kok

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number6471836
Pages (from-to)302-317
Journal / PublicationIEEE Transactions on Power Electronics
Volume29
Issue number1
Online published7 Mar 2013
Publication statusPublished - Jan 2014

Abstract

A method that aims at analyzing the dynamic behavior of some two-phase switched-capacitor charge pump circuits is proposed. A recurrence relation on the voltages across the charging capacitors of a given two-phase charge pump circuit is developed. The output voltage and the accumulated charge of a charge pump circuit after any clock cycle were found by solving some basic matrix equations, with a specific loading current and some required initial conditions. The validation of the proposed method was done by SPICE simulations based on a 8 × linear, Fibonacci, and an exponential charge pump. The analysis results were also verified with the simulation results obtained from some charge pump circuits designed with the 0.18 μm CMOS process. Results show that the proposed method can yield a close estimation on the dynamic behavior of a charge pump circuit in most of the designs. We further found that the rising times for the exponential and Fibonacci charge pumps are shorter, especially when the conversion ratio is high, than that of the linear one. © 1986-2012 IEEE.

Research Area(s)

  • Charge pump, dynamic analysis, switched-capacitor dc/dc converter, transient response

Citation Format(s)

Dynamic analysis of two-phase switched-capacitor DC-DC converters. / Wong, Oi-Ying; Wong, Hei; Tam, Wing-Shan; Kok, Chi-Wah.

In: IEEE Transactions on Power Electronics, Vol. 29, No. 1, 6471836, 01.2014, p. 302-317.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review