Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 68, Issue 10, Pages 9481-9492Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2020.3022494
Keywords
Inductors; Voltage control; Capacitors; Switches; Stress; MOSFET; Switching frequency; Full-range regulation (FR); multilevel; resonant switched-capacitor converter (RSCC)
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Funding
- China Scholarship Council
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This article introduces a new full-range regulation method for multilevel step-down RSCCs, along with corresponding advanced control techniques. Research shows that using this method can achieve efficient and high power density voltage converters.
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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