Switched-capacitor step-down rectifier for low-voltage power conversion
Author(s)Li, Wei; Perreault, David J.
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This paper presents a switched-capacitor rectifier that provides step down voltage conversion from an ac input voltage to a dc output. Coupled with current-drive source, low-loss and high step-down rectification is realized. Implementation in CMOS with appropriate controls results in a design suitable for low-voltage very-high-frequency conversion. Applications include switched-capacitor rectification to convert high-frequency ac to a dc output and, combined with inversion and transformation, to dc-dc converters for low-voltage outputs. A two-step CMOS integrated full-bridge switched-capacitor rectifier is implemented in TSMC 0.25 μm CMOS technology for demonstration purposes. For an operation frequency of 50 MHz and an output voltage of 2.5 V, the peak efficiency of the rectifier is 81% at a power level of 4 W.
DepartmentMassachusetts Institute of Technology. Research Laboratory of Electronics; Massachusetts Institute of Technology. School of Engineering
Proceedings of the 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)
Institute of Electrical and Electronics Engineers (IEEE)
Li, Wei, and David J. Perreault. “Switched-Capacitor Step-down Rectifier for Low-Voltage Power Conversion.” 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC) (March 2013).
Author's final manuscript