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AssigneeAcutechnology Semiconductor Inc.
InventorsPaolo Menegoli, Carl Sawtell
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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 electromagnetic 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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A method for obtaining an air core inductor device for electrical power conversion systems with reduced radiated energy, the method comprising:
A method for obtaining an air core inductor device for electrical power conversion systems with reduced radiated energy, the method comprising constructing a multiplicity of spiral-shaped interconnection structures electrically coupled to each other, whereby the current flowing in said multiplicity of spiral-shaped interconnection structures is generating a plurality of coupled magnetic fields of alternating polarities so as to minimize the resulting stray magnetic field.
Dependencies are inferred from the claim text.