Embedded magnetic power transformer

Inductors and transformers are basic building blocks in power systems. Their attributes are critical to the function and performance of a switch mode power converter (SMPC). Embedded magnetics provides a new approach for fabricating transformers and inductors. A key benefit of this approach is that it provides a practical means for employing toroid (ring) cores in power designs. Essentially, the fabrication is done with a Printed Circuit Board (PCB) line. Ferrite elements are embedded into an FR4 substrate and the device windings are realized using printed circuit techniques. Rather than fabrication one-at-a time, devices are fabricated in a batch format. Automation also brings the benefit of improved consistency and reliability. This paper describes the device composition and fabrication on a printed circuit line