Air core inductive element on printed circuit board for use...

Details Air core inductive element on printed circuit board for use... Air core inductive element on printed circuit board for use...

2007-05-22

2007-05-22

Mai, Anh (Department: 2832)

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

C336S223000, C336S232000, C029S601000

Reexamination Certificate

active

11085322

ABSTRACT:
A low cost, low EMI air core inductor fabricated on printed circuit board for power conversion circuits is described. The inductive element combines the advantages of high efficiency and minimum board height requirements. It allows high frequency switching without adding undesired magnetic losses and minimizing the electro-magnetic interferences in form of radiated energy. The absence of any magnetic layer adds to the simplicity of the manufacturing process resulting in lower cost. This inductive element allows operation for the conventional and higher frequency step-up and step-down switching voltage converters minimizing the size and cost of output capacitors and reducing the output voltage ripple.

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S.C.Tang et al. “Coreless Printed Circuit Board (PCB) Transformers with Multiple Secondary Windings for . . . ”, IEEE Transactions on Power Electronics, vol. 14,No. 3,May99.
G.J.Mehas“Design of Microfabricated Inductors for Microprocessor Power Delivery”, IEEE Applied Power Electronics Conference Mar. 1999.

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