Journal ArticleDOI
Effects of stray inductance on hard-switched switched capacitor converters
Lukas Muller,Jonathan W. Kimball +1 more
- Vol. 29, Iss: 12, pp 6276-6280
TLDR
In this paper, an analytic equation that can be used to evaluate the effects of stray inductance on the equivalent resistance of hard-switched switched capacitor converters is presented. But the authors did not consider the effect of stray induction on SC converter performance.Abstract:
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 losses due to the load current. A variety of methodologies have been presented to predict the equivalent resistance in hard-switched SC converters. These works, however, did not consider the effect of stray inductance on equivalent resistance. Current power converter design practices favor higher switching frequencies, moving hard-switched SC converters into operating areas in which stray inductance affects converter performance. This paper presents an analytic equation that can be used to evaluate the effects of stray inductance on the equivalent resistance of switched capacitor converters. The concepts proposed here are verified by both digital simulation and a prototype converter. The equations presented can be used to evaluate the effects of stray inductance on SC converter performance, thereby helping designers set a maximum operating frequency to limit its effect.read more
Citations
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Journal ArticleDOI
Topology, Modeling, and Design of Switched-Capacitor-Based Cell Balancing Systems and Their Balancing Exploration
TL;DR: In this article, a series of switched-capacitor (SC) cell balancing circuits is proposed for rechargeable energy storage devices like battery and supercapacitors strings in order to minimize the equivalent resistance.
Journal ArticleDOI
High Gain DC–DC Converter Based on the Cockcroft–Walton Multiplier
Lukas Muller,Jonathan W. Kimball +1 more
TL;DR: In this paper, a high step-up current fed converter based on the classical Cockcroft-Walton (CW) multiplier is proposed for photovoltaic applications where high gain, high efficiency, small converter size, and maximum power point tracking are required.
Journal ArticleDOI
Dual Switches DC/DC Converter With Three-Winding-Coupled Inductor and Charge Pump
TL;DR: In this article, the authors proposed a dual switches dc/dc converter with three-winding-coupled inductor and charge pump, which facilitates realization of high step-up voltage gain with a low voltage/current stress on the power switches.
Journal ArticleDOI
A Modular Multilevel Series/Parallel Converter for a Wide Frequency Range Operation
TL;DR: A novel module topology is introduced that allows parallel module connectivity in addition to the series and bypass states and directly transfers power across the modules and arms to cancel the power fluctuations and hence suppresses the capacitor voltage ripple.
Journal ArticleDOI
Analysis and Optimization of Switched Capacitor Power Conversion Circuits With Parasitic Resistances and Inductances
Yuanmao Ye,Ka Wai Eirc Cheng +1 more
TL;DR: In this article, the impact of parasitic resistances and inductances on the performance of switched-capacitor converter (SCC) has been evaluated and the corresponding design methodologies are proposed for both hard and soft-switching SCCs.
References
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Book
Fundamentals of Power Electronics
TL;DR: Converters in Equilibrium, Steady-State Equivalent Circuit Modeling, Losses, and Efficiency, and Power and Harmonics in Nonsinusoidal Systems.
Journal ArticleDOI
Analysis and Optimization of Switched-Capacitor DC–DC Converters
TL;DR: In this paper, a switched-capacitor (SC) dc-dc converter's steady-state performance was evaluated through evaluation of its output impedance. But the performance of SC converters was not compared with conventional magnetic-based dc-DC converter circuits, in the context of various application settings.
Journal ArticleDOI
A high-efficiency CMOS voltage doubler
TL;DR: In this paper, a charge pump cell is used to make a voltage doubler using improved serial switches and a complete power efficiency theory is presented which fits the measurements, and the importance of capacitors is shown with plots of power efficiency versus load and stray capacitors.
Proceedings ArticleDOI
Performance limits of switched-capacitor DC-DC converters
M.S. Makowski,Dragan Maksimovic +1 more
TL;DR: In this paper, the theoretical performance limits of two-phase switched-capacitor (SC) DC-DC power converters are discussed and the complete set of attainable DC conversion ratios is found.
Journal ArticleDOI
The Road to Fully Integrated DC–DC Conversion via the Switched-Capacitor Approach
TL;DR: In this article, the authors provide a perspective on progress toward realization of efficient, fully integrated dc-dc conversion and regulation functionality in CMOS platforms, and provide a comparative assessment between inductor-based and switched-capacitor approaches.
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