TY - JOUR

T1 - Capacitive transposed series-parallel topology with fine tuning capabilities

AU - Beck, Yuval

AU - Singer, Sigmond

N1 - Funding Information:
Manuscript received January 04, 2010; revised April 15, 2010; accepted June 08, 2010. Date of publication August 03, 2010; date of current version December 30, 2010. This work was supported by the Israeli Science Foundation-ISF under Grant 1250/50. Some of the topologies are protected under provisional Patent No.P-73186-USP. This paper was recommended by Associate Editor I. M. Filanovsky.

PY - 2011

Y1 - 2011

N2 - A general transposed series-parallel topology of a switched-capacitor converter is presented and analyzed in this paper. This topology evolved from the conventional series-parallel through rectangular matrices based topologies to partial arbitrary matrices which are constructed of different size strings of capacitors to arbitrary matrices, based on a bank of equally valued capacitors. Theoretically, these topologies have a large number of dc/dc voltage ratios, which lead to the capability to achieve very accurate fixed dc/dc voltage ratios. These topologies also have the capability for fine tuning when voltage regulation is necessary. For the general transposed series-parallel topology, it is shown that the number of possible dc/dc voltage transfer ratios escalates exponentially with an addition of each capacitor as the sum of partition functions. Therefore, relatively fewer components are required for an assumed accurate voltage ratio. Dispersion of parameters in the capacitance value is considered. Small ripple analysis, losses calculations and efficiency considerations are also discussed. Simulations are performed for 2.2 and 2.25 voltage ratios. The simulations are in good agreement with the theoretical calculations.

AB - A general transposed series-parallel topology of a switched-capacitor converter is presented and analyzed in this paper. This topology evolved from the conventional series-parallel through rectangular matrices based topologies to partial arbitrary matrices which are constructed of different size strings of capacitors to arbitrary matrices, based on a bank of equally valued capacitors. Theoretically, these topologies have a large number of dc/dc voltage ratios, which lead to the capability to achieve very accurate fixed dc/dc voltage ratios. These topologies also have the capability for fine tuning when voltage regulation is necessary. For the general transposed series-parallel topology, it is shown that the number of possible dc/dc voltage transfer ratios escalates exponentially with an addition of each capacitor as the sum of partition functions. Therefore, relatively fewer components are required for an assumed accurate voltage ratio. Dispersion of parameters in the capacitance value is considered. Small ripple analysis, losses calculations and efficiency considerations are also discussed. Simulations are performed for 2.2 and 2.25 voltage ratios. The simulations are in good agreement with the theoretical calculations.

KW - Circuit theory

KW - dc-dc power conversion

KW - integrated circuits

KW - multiplying circuits

KW - switched systems

UR - http://www.scopus.com/inward/record.url?scp=78650965783&partnerID=8YFLogxK

U2 - 10.1109/TCSI.2010.2055277

DO - 10.1109/TCSI.2010.2055277

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:78650965783

SN - 1549-8328

VL - 58

SP - 51

EP - 61

JO - IEEE Transactions on Circuits and Systems I: Regular Papers

JF - IEEE Transactions on Circuits and Systems I: Regular Papers

IS - 1

M1 - 5535204

ER -