Publications

Abstract not provided.

The Fly-buck converter provides a simple, lowcost solution to generating multiple isolated or non-isolated output voltage rails using secondary windings of the coupled inductor. Under certain operating conditions, the high side (HS) and low side (LS) switches can realize zero-voltage-switching (ZVS) at turn-ON, reducing switching losses and electromagnetic interference (EMI). However, several factors play a critical role in determining the soft-switching criteria. Therefore, this paper presents an in-depth analysis and evaluation of the ZVS operation through developing equivalent circuit models of the fly-buck converter along with a parametric study of the design variables, including leakage inductance, output current ratio, and dead time.

This paper evaluates the performance of a novel nano-composite core inductor. In this digest, a brief explanation of the superparamagnetic magnetite nanoparticle core is given along with magnetic characterization results and simulated design parameters and dimensions. A nearly flat relative permeability (μr) of around 5 is measured for the magnetic material to 1 MHz. A synchronous buck converter with nano-composite inductor was constructed and evaluated; the converter demonstrates a 1% improvement in conversion efficiency at higher currents (4% reduction in electrical losses), compared to an identical circuit with a benchmark commercial ferrite inductor.

Abstract not provided.