This brief presents a fully integrated dc-dc converter consisting of only two CMOS chips, which are a power oscillator with an integrated transformer and a full-bridge rectifier. A thick inter-metal oxide layer guarantees a galvanic isolation rating as high as 5 kV. A current-reuse hybrid-coupled oscillator is proposed, which is based on a three-winding tapped isolation transformer and improves both output power and silicon area occupation with respect to previous works. The converter is operated at 5-V power supply and is able to deliver up to 300-mW dc power at 10-V output voltage while exhibiting a power density and a power efficiency of 36 mW/mm2 and 24%, respectively.

A galvanically isolated DC-DC converter based on current-reuse hybrid-coupled oscillators

Greco N;Ragonese E;PALMISANO, Giuseppe
2017-01-01

Abstract

This brief presents a fully integrated dc-dc converter consisting of only two CMOS chips, which are a power oscillator with an integrated transformer and a full-bridge rectifier. A thick inter-metal oxide layer guarantees a galvanic isolation rating as high as 5 kV. A current-reuse hybrid-coupled oscillator is proposed, which is based on a three-winding tapped isolation transformer and improves both output power and silicon area occupation with respect to previous works. The converter is operated at 5-V power supply and is able to deliver up to 300-mW dc power at 10-V output voltage while exhibiting a power density and a power efficiency of 36 mW/mm2 and 24%, respectively.
2017
CMOS integrated circuits, DC-DC power convertors, oscillators, transformer windings, power density, power efficiency, three-winding tapped isolation transformer, thick inter-metal oxide layer, integrated transformer, full-bridge rectifier, power oscillator, CMOS chip, fully integrated DC-DC converter, current-reuse hybrid-coupled oscillator, galvanically isolated DC-DC converter, voltage 5 kV, voltage 10 V, Oscillators, Rectifiers, Couplings, Windings, Metals, Topology, DC-DC power converters, Coupled oscillators current-reuse, electromagnetic (EM) simulations, galvanic isolation;integrated circuits (ICs), integrated transformers, power oscillator, rectifier, Schottky diodes, silicon oxide
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/20464
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