Embedded magnetic component transformer device

Abstract

An embedded transformer device includes first, second, and auxiliary windings, defined in an insulating substrate by conductive vias joined together by conductive traces. The positions of the conductive vias are arranged to optimize the isolation properties of the transformer and to reduce the coupling of the transformer by increasing the leakage inductance. The embedded transformer device provides better isolation between input side and output side windings, and allows an oscillating LC circuit to be set up in the case of a short circuit, preventing high power from extending between the input and output terminals and thereby avoiding damage to the connected electrical components.

Description

technical field [0001] The present application relates to embedded magnetics transformer devices, and more particularly to embedded magnetics transformer devices with reduced coupling and improved isolation performance. Background technique [0002] For example in US2011 / 0108317A1 it is known to provide low profile transformers and inductors, wherein magnetic components are embedded in cavities in a resin substrate and the necessary input and output electrical connections for the transformer or inductor are made in on the substrate surface. A printed circuit board (PCB) for a power supply device may then be formed by adding a solder resist layer and an electroplated copper layer to the top and / or bottom surface of the substrate. The necessary electronic components of the device can then be surface mounted on the PCB. [0003] The embedded design allows the construction of significantly thinner and more compact devices than conventional transformers. This is desirable beca...

AI Technical Summary

Problems solved by technology

However, all of these techniques have the disadvantage that the embedded magnetics transformer device must be made larger to accommodate additional PCB layers or thicker insulation on the windings and / or core

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