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Correction published on 19 April 2018, see J. Low Power Electron. Appl. 2018, 8(2), 11.

Open AccessArticle
J. Low Power Electron. Appl. 2018, 8(1), 8; https://doi.org/10.3390/jlpea8010008

A Performance of the Soft-Charging Operation in Series of Step-Up Power Switched-Capacitor Converters

Daniel Felix Ritchie School of Engineering & Computer Science, University of Denver, 2155 E Wesley Ave, Denver, CO 80208, USA
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Received: 8 February 2018 / Revised: 3 March 2018 / Accepted: 11 March 2018 / Published: 12 March 2018
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Abstract

Due to their high power density and appropriateness for small circuits integration, switched-capacitor (SC) converters have gotten more interests. Applying the soft-charging technique effectively eliminates the current transient that results in a higher power density and a higher fundamental efficiency. Achieving the complete soft-charging operation is impossible by using the conventional control diagram for any SC converter topology. In this paper, we proposed a split-phase control to achieve the complete soft-charging operation in a power switched-capacitor (PSC) converter. The proposed control diagram was designed for a 1-to-4 PSC converter (two-level of the PSC converter). The implemented split-phase diagram successfully controls eight switches to exhibit eight modes of operation. In addition to the current transient elimination, the complete soft-charging allows us to reduce capacitor sizes. However, reducing capacitor size negatively increases the output voltage ripple; hence, an output LC filter is needed. The complete soft-charging achievement accomplishes a 96% efficiency due to the lower output impedance and the dead time switching. LT-Spice software has been used to verify the proposed control and the results were compared with hard-charging and incomplete soft-charging operations. View Full-Text
Keywords: the PSC converter; the complete soft-charging; switched-capacitors converters; LT spice the PSC converter; the complete soft-charging; switched-capacitors converters; LT spice
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Alateeq, A.; Almalaq, Y.; Matin, M. A Performance of the Soft-Charging Operation in Series of Step-Up Power Switched-Capacitor Converters. J. Low Power Electron. Appl. 2018, 8, 8.

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J. Low Power Electron. Appl. EISSN 2079-9268 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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