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ispartof: pages:1-174 status: published

This book describes synergetic innovation opportunities offered by combining the field of power conversion with the field of integrated circuit (IC) design. The authors demonstrate how integrating circuits enables increased operation frequency, which can be exploited in power converters to reduce drastically the size of the discrete passive components. The authors introduce multiple power converter circuits, which are very compact as result of their high level of integration. First, the limits of high-power-density low-voltage monolithic switched-capacitor DC-DC conversion are investigated to enable on-chip power granularization. AC-DC conversion from the mains to a low voltage DC is discussed, enabling an efficient and compact, lower-power auxiliary power supply to take over the power delivery during the standby mode of mains-connected appliances, allowing the main power converter of these devices to be shut down fully. Discusses high-power-density monolithic switched-capacitor DC-DC conversion in bulk CMOS, including a theoretical analysis of the impact of the most important loss contribution, the bottom-plate parasitic coupling; Describes advances on AC-DC conversion in a monolithic single-stage solution, as well as a highly-integrated two-stage approach; Includes theoretical analysis and comparison of monolithic switched-capacitor DC-DC converter topologies toward high-ratio voltage conversion.

A fully integrated 265 VRMS input AC-DC interface is demonstrated in a 0.35-μm CMOS technology, requiring only one optional external low-voltage SMD capacitor for improved performance. The converter can directly interface the universal line voltage (50-60 Hz) and converts this into a regulated DC voltage of 3.3 V. High input voltage operation is made possible through separation of the mains input from the active circuits by custom layout high-voltage capable passive components in between. A compact model of an ideal AC-DC capacitive step-down converter is presented and the proposed circuit architecture is designed to mimic ideal operation and approach the maximum attainable power throughput accordingly. The prototype converter demonstrates a maximum output power of 12.7 μW on a die area of 6 mm2 and enables integrated circuits to be supplied straight from the ubiquitous mains voltage, hereby circumventing the need for traditional converters using expensive and bulky high-voltage discrete components. © 1966-2012 IEEE. ispartof: IEEE Journal of Solid-State Circuits vol:48 issue:7 pages:1558-1564 ispartof: location:FRANCE, Bordeaux status: published