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In-board magnetic devices.

Record Type:	Electronic resources : Monograph/item
Title/Author:	In-board magnetic devices.
Author:	Zhang, Yi.
Description:	110 p.
Notes:	Chair: Seth R. Sanders.
Notes:	Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4545.
Contained By:	Dissertation Abstracts International64-09B.
Subject:	Engineering, Electronics and Electrical.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3105413
ISBN:	0496529803

In-board magnetic devices.
Zhang, Yi.

In-board magnetic devices. [electronic resource] - 110 p.

Chair: Seth R. Sanders.

Thesis (Ph.D.)--University of California, Berkeley, 2003.

This dissertation introduces a design and manufacturing process for integrating magnetic components, transformers and inductors, within a multilayer printed circuit board (PCB). The thickness of the resulting magnetic component can be rather small, comparable to that of standard laminated multilayer PCB's. If the traces used to form the turns of the magnetic devices are internal layers of the multilayer PCB, the surface real estate occupied by the magnetic device is fully available for other surface mountable components. Thus, this technology offers great advantage in packaging density. In addition, the planar type form factor provides for a large surface area to volume ratio, allowing for effective heat transfer from the magnetic device. This dissertation provides a design methodology for in-board magnetic devices. Winding designs can be made to nearly eliminate external magnetic fields. Permeable cores of in-board magnetic components can be realized with various different magnetic materials. Core loss and permeability can be controlled by selection of material, introducing anisotropy, gapping, and combinations of these. Prototype transformers and inductors are fabricated using the process. Test results match well with simple models, demonstrating that 98--99% efficiency is possible with a core height of approximately 2mm. Finally, a 100W 48V/3.3V DC-DC converter is built demonstrating the manufacturability of the in board magnetic devices.

ISBN: 0496529803Subjects--Topical Terms:

226981
Engineering, Electronics and Electrical.

In-board magnetic devices.
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