On the modeling of switched capacitor converters with multiple outputs

Abstract

The internal nodes of switched capacitor converters can be used to provide multiple pulsed width modulated voltages that, in combination with filter inductors, can extend the available dc outputs. Such converter architecture requires models that accurately predict the behaviour of switched capacitor converters operated in current output mode. Based on the well-known output impedance model, a new circuit representation is proposed for converters with multiple current-loaded outputs. A characterization methodology is developed to determine the parameters of said model. Predictions of the new model compare favorably to circuit simulations and experimental measurementsPostprint (published version

Dual output sub-period interleaved step-up Fibonacci switched capacitor converters

“…Perhaps, the most challenging question, which has remained open in this paper, is mutual influence of the outputs or cross-regulation. One of the approaches to modelling the cross-regulation has been proposed recently in [11] and uses a set of trans-impedance parameters. The proposed SCC can be considered as hardware that solves a system of linear equations defined by the modified 0-MSB codes.…”

MIMO Switched-Capacitor DC–DC Converters Using Only Parasitic Capacitances Through Scalable Parasitic Charge Redistribution

“…However, it still does so in linear fashion. Figure 6b shows the model proposed in [29]. Here, the voltage drop across the terminals of port i, ∆V i , is shown to be…”

“…In [29] a method is described to work out Z given an SC converter's topology by using a charge-based analysis for each node separately. Due to the highly regular structure of the parasitic MIMO converter, however, it is possible to derive the elements of Z directly using a more intuitive approach.…”

MIMO Switched-Capacitor converter using only parasitic capacitance with Scalable Parasitic Charge Redistribution

“…The usual way to characterize a MIMO converter is by its impedance matrix Z, which describes how voltages deviate from the ideal node voltage under different load conditions [8]. More specifically, each element Z i,j is the transimpedance of a load current at B j , to the voltage drop at B i .…”