Multilevel Step-Down Resonant Switched-Capacitor Converters With Full-Range Regulation

Multilevel resonant switched-capacitor converters (RSCCs) have drawn attention in large step-down voltage conversion but are hindered in a wide area of applications due to limited voltage regulation range. A new full-range regulation (FR) method for multilevel step-down RSCCs is proposed in this art...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) Vol. 68; no. 10; pp. 9481 - 9492
Main Authors: Xie, Wenhao, Brown, Benjamin Y., Smedley, Keyue Ma
Format: Journal Article
Language:English
Published: New York IEEE 01.10.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Capacitors
Converters
Electric potential
Energy conversion efficiency
Fibonacci numbers
Full-range regulation (FR)
Inductors
MOSFET
Multilevel
resonant switched-capacitor converter (RSCC)
Stress
Switches
Switching
Switching frequency
Voltage
Voltage control
ISSN:0278-0046, 1557-9948
Online Access:Get full text
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Summary:Multilevel resonant switched-capacitor converters (RSCCs) have drawn attention in large step-down voltage conversion but are hindered in a wide area of applications due to limited voltage regulation range. A new full-range regulation (FR) method for multilevel step-down RSCCs is proposed in this article. As an example of the proposed FR method, the fixed on-time modulation for modified Dickson RSCC is provided. In addition to full-range voltage regulation, the multilevel RSCCs with the proposed FR method feature complimentary driving signals, zero voltage switching turn- on for switches, zero current switching turn- off for diodes, even switch voltage stress, even diode voltage stress, high active switch utilization, high efficiency, and high power density. A modified Dickson RSCC prototype was built to validate the proposed FR method. The proposed FR method is further extended to series-parallel RSCCs and Fibonacci RSCCs.
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ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2020.3022494