Generic average modeling and simulation of the static and dynamic behavior of Switched Capacitor Converters

Abstract

Abstract-A generic behavioral average circuit model of a Switched Capacitor Converter (SCC) is proposed and verified. The model is based on the average currents concept and assumes that each of the SCC subcircuits can be described or approximated as a first order network. The model can be used to calculate or simulate the average static, dynamic and small signal responses of the SCC. The model is valid for all operational modes of a SCC (complete, partial and no charge) and is compatible with any circuit simulator that includes dependent sources. Excellent agreement was found between the behavior of the proposed average model, full circuit simulation, and experimental results.

Modeling and analysis of hybrid converters

“…This resulted in a less damped response of the full simulation and of the model calculated results. It should be noted that a basic limitation of the model is the assumption that the capacitors' charge/discharge processes could be approximated by first order RC subcircuits [9][10][11]. …”

“…This facilitates displaying the two results side by side for comparison. Some aspects of PSpice implementation of SCC and GSIM average models are discussed later on in this section and more details can be found in [7][8][9]. The module encircled in Fig.…”

“…As such, the model is compatible with CCM and DCM operation modes and capable of seamless sweeping between them as is the GSIM model it is based on [8]. It is compatible with all operational modes of SCC -CC, PC, and NC [9,11,17]. The model provides an insight into the operation of the hybrid converters and can be used to analyze the effects of the circuit parameters such as values of the components on the static and dynamic responses.…”

“…The objective of this study was to develop a generic average model of hybrid converters based on PWM switched inductor and SCC systems that are compatible with available simulation packages and that will be capable of reproducing the static and dynamic behavior of the converter, including the small signal responses. The proposed average modeling approach applies the concept of equivalent circuit models of switched inductor converters and SCC [7][8][9]. The latter is based on a loss model described in [7][8][9][10][11].…”

“…The proposed average modeling approach applies the concept of equivalent circuit models of switched inductor converters and SCC [7][8][9]. The latter is based on a loss model described in [7][8][9][10][11]. The major contribution of the present study as compared to previously published work is the fusion of two distinctive equivalent circuit models into a single generic equivalent circuit model, which provides a tool to evaluate hybrid converter structures in a generic way.…”