Title :
Realizability conditions and bounds on synthesis of switched-capacitor DC-DC voltage multiplier circuits
Author :
Makowski, Marek S.
Author_Institution :
Dept. of Electron., Tech. Univ. Gdansk, Poland
fDate :
8/1/1997 12:00:00 AM
Abstract :
A formal study of the theoretical performance of switched-capacitor (SC) dc-dc voltage multiplier circuits is given. A question concerning the necessary number of circuit elements to realize a given conversion ratio is addressed. In response to the question the bound on attainable voltage ratio for a given number of capacitors k and the bound on the number of switches required in any circuit configuration have been established. The maximum step-up or step-down ratio is given by the kth Fibonacci number, while the bound on the number of switches required in any SC circuit is 3k-2. The complete set of attainable DC conversion ratios is found. A canonical circuit realization of the maximum voltage ratio is discussed and illustrative examples are included. Necessary and sufficient conditions for the realizability of a dc conversion ratio are determined and formal proofs are given
Keywords :
DC-DC power convertors; network synthesis; switched capacitor networks; voltage multipliers; DC conversion ratio; Fibonacci number; attainable voltage ratio; canonical circuit realization; circuit configuration; realizability conditions; step-down ratio; step-up ratio; switched-capacitor DC-DC voltage multiplier circuits; Circuit synthesis; Energy storage; Integrated circuit reliability; Semiconductor diodes; Sufficient conditions; Switched capacitor circuits; Switches; Switching circuits; Switching converters; Voltage;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
