Powder Core Material Coupled Inductors And Associated Methods
First Claim
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1. A coupled inductor, comprising:
- a monolithic magnetic core;
N windings formed of conductive film and at least partially embedded in the monolithic magnetic core, N being an integer greater than one; and
a plurality of terminals, each of the N windings electrically coupled between a respective pair of the plurality of terminals.
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Abstract
A multi-phase coupled inductor includes a powder core material magnetic core and first, second, third, and fourth terminals. The coupled inductor further includes a first winding at least partially embedded in the core and a second winding at least partially embedded in the core. The first winding is electrically coupled between the first and second terminals, and the second winding electrically is coupled between the third and fourth terminals. The second winding is at least partially physically separated from the first winding within the magnetic core. The multi-phase coupled inductor is, for example, used in a power supply.
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Citations
28 Claims
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1. A coupled inductor, comprising:
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a monolithic magnetic core; N windings formed of conductive film and at least partially embedded in the monolithic magnetic core, N being an integer greater than one; and a plurality of terminals, each of the N windings electrically coupled between a respective pair of the plurality of terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for forming a coupled inductor, comprising:
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disposing a first plurality of layers of magnetic film to form a first portion of a magnetic core; disposing one or more layers of conductive film on the first portion of the magnetic core such that the one or more layers of conductive film form at least a first and a second winding; and disposing a second plurality of layers of magnetic film on the first portion of the magnetic core and the one or more layers of conductive film to form a second portion of the magnetic core. - View Dependent Claims (20, 21, 22, 23)
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24. A power supply, comprising:
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a coupled inductor, including; a monolithic magnetic core, and N windings formed of conductive film and at least partially embedded in the monolithic magnetic core, N being an integer greater than one, each winding having a first end electrically coupled to a first node; and N switching circuits, each switching circuit operable to switch a second end of a respective one of the N windings between at least two different voltage levels at a frequency of at least 20 kilohertz. - View Dependent Claims (25, 26, 27, 28)
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Specification