Merged two-stage power converterarchitecture with softcharging switched-capacitor energy transfer

Pilawa-Podgurski, Robert C. N.; Giuliano, David; Perreault, David J.

doi:10.1109/pesc.2008.4592581

Cited by 122 publications

(48 citation statements)

References 19 publications

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“…Finally, it is important to point out that direct topology can also be viewed as a switched-capacitor stage followed by an inductor stage to implement soft-switching. In this implementation, the topology can also be viewed in context to [12][13], with the difference of using a primarily resonant mode of operation. Fig.…”

Section: Direct Resonant Switched Capacitor Convertermentioning

confidence: 99%

“…Other efforts have explored switched capacitor topologies that also use small magnetic components or are merged with inductor-based DC-DC converters [8][9][10][11][12][13]. For example, in [12][13], a first SC stage handles the bulk of the step-down process and a second inductor-based stage is used to provide variable conversion ratios.…”

Section: Introductionmentioning

confidence: 99%

“…For example, in [12][13], a first SC stage handles the bulk of the step-down process and a second inductor-based stage is used to provide variable conversion ratios. In a number of operating modes, the inductor stage can facilitate soft-switching of the SC stage, which improves efficiency.…”

Section: Introductionmentioning

confidence: 99%

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The direct-conversion resonant switched capacitor architecture with merged multiphase interleaving: Cost and performance comparison

Kesarwani

Stauth

2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Switched capacitor and resonant switched capacitor topologies have gained interest in recent years for highly integrated (monolithic) DC-DC converters, and more generally for a range of applications that require high density, high efficiency, and low cost. This work presents experimental and theoretical results for a new resonant topology that has architectural similarity to the more common 3-level buck converter. We further outline the prospects of using mergedinterleaving to reduce voltage ripple while maximizing the utilization of passive components. We present the results of an experimental prototype that can be configured as a switched capacitor, resonant switched capacitor, or resonant 3-level topology. Importantly, by constraining factors such as total cost of active and passive components, volumetric energy density, and other design factors, we attempt to provide a fair comparison of the respective converter prototypes for applications spanning DC power delivery, and power management for renewable energy applications such as photovoltaics and battery management.

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Section: Direct Resonant Switched Capacitor Convertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The direct-conversion resonant switched capacitor architecture with merged multiphase interleaving: Cost and performance comparison

Kesarwani

Stauth

2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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“…A number of different methods for minimizing the volume of the reactive components [2]- [9], have been proposed in the past. Generally, those can be divided in the frequency based and topological solutions.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the use of SC in typical applications of interest, where the load changes frequently and input voltage is not constant, is fairly limited. To eliminate the previously mentioned problems, cascade connections of a SC and a conventional buck (Fig.I) have been proposed in [7]- [9]. The cascaded topologies eliminate the voltage regulation problem and have much smaller inductor than the conventional buck.…”

Section: Introductionmentioning

confidence: 99%

High-power density hybrid converter topologies for low-power Dc-Dc SMPS

Radić

Ahssanuzzaman

Mahdavikhah

et al. 2014

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

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This paper gives a review of several emerging dc-de converter topologies that combine capacitor-based and inductive converters in single hybrid converter structures. It is shown that, compared to the conventional topologies, the hybrid buck converters allow for a drastic reduction of the inductive components while minimizing switching losses and improving the overall power processing efficiency. Therefore, the hybrid converters result in a higher power density. As examples, buck with merged capacitive divider, a two-phase interleaved buck, and a differential buck-based multi-output power module for mobile applications are shown. The presented converters have up to four times smaller inductor volume and, at the same time, about 12% lower losses.

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2016

Power Systems‐On‐Chip

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Merged two-stage power converterarchitecture with softcharging switched-capacitor energy transfer

Cited by 122 publications

References 19 publications

The direct-conversion resonant switched capacitor architecture with merged multiphase interleaving: Cost and performance comparison

The direct-conversion resonant switched capacitor architecture with merged multiphase interleaving: Cost and performance comparison

High-power density hybrid converter topologies for low-power Dc-Dc SMPS

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