# Modeling of capacitor impedance in switching converters

@article{Kimball2005ModelingOC, title={Modeling of capacitor impedance in switching converters}, author={Jonathan W. Kimball and Philip T. Krein and K.R. Cahill}, journal={IEEE Power Electronics Letters}, year={2005}, volume={3}, pages={136-140} }

Switched capacitor (SC) converters are gaining acceptance as alternatives to traditional, inductor-based switching power converters. Proper design of SC converters requires an understanding of all loss sources and their impacts on circuit operation. In the present work, an equivalent resistance method is developed for analysis, and equivalent resistance formulae are presented for various modes of operation. Quasiresonant converters are explored and compared to standard SC converters…

## Figures and Tables from this paper

## 98 Citations

Effects of stray inductance on hard-switched switched capacitor converters

- Engineering2014 Power and Energy Conference at Illinois (PECI)
- 2014

Switched capacitor (SC) converters are becoming quite popular for use in DC-DC power conversion. The concept of equivalent resistance in SC converters is frequently used to determine the conduction…

Effects of stray inductance on hard-switched switched capacitor converters

- Engineering
- 2014

Switched capacitor (SC) converters are becoming quite popular for use in DC-DC power conversion. The concept of equivalent resistance in SC converters is frequently used to determine the conduction…

Switched Capacitor DC-DC Converters: A Survey on the Main Topologies, Design Characteristics, and Applications

- EngineeringEnergies
- 2021

This work presents a review of the main topologies of switched capacitors used in DC-DC power conversion, that is, voltage doubler, series-parallel, Dickson, Fibonacci, and ladder.

Practical Performance Analysis of Complex Switched-Capacitor Converters

- EngineeringIEEE Transactions on Power Electronics
- 2011

This paper introduces a new analysis technique for complex switched-capacitor (SC) converters. It uses conventional circuit analysis methods to derive state-space models of each switching mode.…

A Dynamic Model of Switched-Capacitor Power Converters

- EngineeringIEEE Transactions on Power Electronics
- 2014

Switched-capacitor (SC) converters are frequently used for low-power applications that require little or no output regulation. Previous work has established static SC converter models, essentially…

Switched Capacitor Based High Gain DC-DC Converter Topology for Multiple Voltage Conversion Ratios with Reduced Output Impedance

- Engineering
- 2019

This paper presents a switched capacitor (SC) based bidirectional dc-dc converter topology for high voltage gain applications. The proposed converter is able to operate with multiple integral voltage…

Comparative Analysis of Steady-State Models for a Switched Capacitor Converter

- EngineeringIEEE Transactions on Power Electronics
- 2017

A recently reported modeling methods for a switched capacitor converter either assume output as “firm” voltage or a resistor to facilitate calculation. When the size of output filter capacitor is…

A General Method for Analyzing Resonant and Soft-Charging Operation of Switched-Capacitor Converters

- EngineeringIEEE Transactions on Power Electronics
- 2015

Traditionally, switched-capacitor (SC) converters have suffered from high transient currents, which limit both the efficiency and power density of such converters. Soft-charging operation can be…

A bidirectional switched-capacitor based AC-AC resonant converter

- Engineering2016 IEEE 11th Conference on Industrial Electronics and Applications (ICIEA)
- 2016

A novel direct ac-ac converter based on the switched-capacitor and series resonant principle, featuring with soft switching characteristic and bidirectional power flow, is proposed in this paper. The…

Steady state analysis of voltage multiplier ladder switched-capacitor cell

- Engineering2016 12th IEEE International Conference on Industry Applications (INDUSCON)
- 2016

Switched capacitor converters have become an alternative for high gain power conversion. The ladder switched capacitor cell is used for voltage multiplying and, when associated with other…

## References

SHOWING 1-10 OF 13 REFERENCES

Switched-capacitor power supplies: DC voltage ratio, efficiency, ripple, regulation

- Engineering1996 IEEE International Symposium on Circuits and Systems. Circuits and Systems Connecting the World. ISCAS 96
- 1996

A comprehensive and accurate steady-state analysis of a step-up DC-DC switched-capacitor power converter is performed. No approximations, such as average techniques, are invoked. Parasitic elements…

Switched-capacitor-based DC-to-DC converter with improved input current waveform

- Engineering1996 IEEE International Symposium on Circuits and Systems. Circuits and Systems Connecting the World. ISCAS 96
- 1996

A new type of DC-to-DC converter is proposed by using dual basic quasi-switched-capacitor (QSC) converter cells. The prominent feature of this converter is its improved input current waveform, which…

A new switched-capacitor dc-dc converter with improved line and load regulations

- EngineeringISCAS'99. Proceedings of the 1999 IEEE International Symposium on Circuits and Systems VLSI (Cat. No.99CH36349)
- 1999

A new switched-capacitor (SC) step-down dc-dc converter is presented. It exhibits smaller size, lighter weight and stronger regulation capabilities than previous SC converters of the same power…

Development of DC/DC regulators based on switched-capacitor circuits

- EngineeringISCAS'99. Proceedings of the 1999 IEEE International Symposium on Circuits and Systems VLSI (Cat. No.99CH36349)
- 1999

Design and analysis of n-stage switched-capacitor (SC)-based step-up DC/DC regulators using a current control scheme to adjust the charging trajectory of the capacitors are presented and theoretical predictions are favorably verified with experimental measurements.

Efficiency analysis of switched capacitor doubler

- PhysicsProceedings of the 39th Midwest Symposium on Circuits and Systems
- 1996

Switched capacitors doubler and triplers are used to step-up dc voltage. They are readily integrable which makes them a good choice for numerous applications. Their power conversion efficiency is…

Switched-capacitor power electronics circuits

- Engineering
- 2001

This paper is a tutorial of the main results in switched-capacitor (SC) converters research and design.

Inductorless DC-to-DC converter with high power density

- EngineeringIEEE Trans. Ind. Electron.
- 1994

A new type of switching-mode power supply containing no inductors or transformers makes possible the realization of power converters of small size, low weight and high power density, able to be manufactured in IC technology.

Improved Spice models of aluminum electrolytic capacitors for inverter applications

- Engineering
- 2002

Impedance modeling of aluminum electrolytic capacitors presents a challenge to design engineers, due to the complex nature of the capacitor construction. Unlike an electrostatic capacitor, an…

A magnetic-less DC-DC converter for dual voltage automotive systems

- Engineering
- 2002

The automotive industry is moving toward 42 volt to meet the more electric needs. Several dual voltage (42 and 14 volt) architectures have been proposed for the transition and accommodation of…

Steady-state small-signal analysis of switched-capacitor circuits

- EngineeringProceedings of the 39th Midwest Symposium on Circuits and Systems
- 1996

This paper presents a steady-state small-signal analysis method for nonlinear circuits. The method can be used to calculate the steady-state time domain representation as well as the frequency…