Abstract
This paper proposes a novel nonisolated flyback switching capacitor voltage regulator. The converter is a combination of a switching capacitor converter and a pulsewidth modulation voltage regulator, and it has the following advantages: 1) the switches achieve zero voltage switching (ZVS); 2) the self-driven method of the synchronous rectifier (SR) is applied to save the drive loss and the body diode conduction loss; 3) the transformer leakage inductor is utilized to realize the soft switching of the switches; and 4) single-phase option makes it more flexible. Its derivation, operation principle, and self-driven method are presented. A single-phase 700 kHz 1.2 V/35 A output point-of-load prototype was built to verify the analysis.
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