Low Profile Inductors For High Density Circuit Boards
First Claim
1. An inductor for assembly on a printed circuit board, comprising:
- a core formed of a magnetic material; and
a first foil winding wound at least partially around or through at least a portion of the core, a first end of the first winding extending away from the core to form a first extended output tongue, a second end of the first winding forming a solder tab,the solder tab and at least a portion of the first extended output tongue formed at a same height relative to a bottom surface of the core for surface mount attachment to the printed circuit board, andthe first extended output tongue configured and arranged to supplement or serve as a substitute for a first foil trace disposed on a surface of the printed circuit board.
1 Assignment
0 Petitions
Accused Products
Abstract
An inductor includes a core formed of a magnetic material and a foil winding wound at least partially around or through at least a portion of the core. A first end of the winding extends away from the core to form an extended output tongue configured and arranged to supplement or serve as a substitute for a printed circuit board foil trace. A second end of the winding forms a solder tab. At least a portion of the extended output tongue and the solder tab are formed at a same height relative to a bottom surface of the core. Another inductor includes a core formed of a magnetic material, a winding wound at least partially around or through at least a portion of the core, and a ground return conductor attached to the core. The core does not form a magnetic path loop around the ground return conductor.
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Citations
44 Claims
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1. An inductor for assembly on a printed circuit board, comprising:
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a core formed of a magnetic material; and a first foil winding wound at least partially around or through at least a portion of the core, a first end of the first winding extending away from the core to form a first extended output tongue, a second end of the first winding forming a solder tab, the solder tab and at least a portion of the first extended output tongue formed at a same height relative to a bottom surface of the core for surface mount attachment to the printed circuit board, and the first extended output tongue configured and arranged to supplement or serve as a substitute for a first foil trace disposed on a surface of the printed circuit board. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An inductor for assembly on a printed circuit board, comprising:
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a core formed of a magnetic material; and a first foil winding wound at least partially around or through at least a portion of the core, a first end of the first winding extending away from the core to form a first extended output tongue, a second end of the first winding extending away from the core to form a first extended input tongue, at least respective portions of the first extended output tongue and the first extended input tongue formed at a same height relative to a bottom surface of the core for surface mount attachment to the printed circuit board, the first extended output tongue configured and arranged to supplement or serve as a substitute for a first foil trace disposed on a surface of the printed circuit board, and the first extended input tongue configured and arranged to supplement or serve as a substitute for a second foil trace disposed on the surface of the printed circuit board. - View Dependent Claims (9, 10)
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11. An inductor for assembly on a printed circuit board, comprising:
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a core formed of a magnetic material; a first winding wound at least partially around or through at least a portion of the core; and a first ground return conductor attached to the core, the first winding and the first ground return conductor configured and arranged such that inductance of the first ground return conductor is not significantly increased by presence of the core, while inductance of the first winding is significantly increased by presence of the core, relative to an otherwise identical inductor without the core. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An inductor for assembly on a printed circuit board, comprising:
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an elongated ground return conductor forming at least one solder tab at each end of the conductor; at least two spacer elements disposed on the ground return conductor; and an elongated foil winding forming at least one solder tab at each end of the winding, the winding disposed on the spacer elements such that the spacer elements separate the ground return conductor from the winding to create a channel between the ground return conductor and the winding. - View Dependent Claims (32, 33)
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34. A printed circuit board assembly including a drop-in inductor attached to a printed circuit board, the drop-in inductor, comprising:
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a first foil winding wound through an opening in a magnetic core; and a first ground return conductor attached to the core; and wherein the first foil winding and the first ground return conductor are configured and arranged such that inductance of the first ground return conductor is not significantly increased by presence of the core, while inductance of the first foil winding is significantly increased by presence of the core, relative to an otherwise identical inductor without the core; wherein the first foil winding and the first ground return conductor have ends formed as solder tabs for attachment to the printed circuit board, and wherein the tabs of the first foil winding and the first ground return conductor are formed at a same height relative to a bottom surface of the core; wherein the tabs of the first foil winding, and the tabs of the first ground return conductor are attached to foil of the same layer of the printed circuit board; and wherein the printed circuit board forms an aperture, the core of the inductor extending into the aperture. - View Dependent Claims (35)
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36. A printed circuit board assembly, comprising:
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a printed circuit board; at least one switching device attached to the printed circuit board; and an inductor attached to the printed circuit board, the inductor including; a core formed of a magnetic material; and a foil winding wound at least partially around or through at least a portion of the core, a first end of the winding extending away from the core to form an extended input tongue, at least a portion of the extended input tongue soldered to and supplementing a first foil trace disposed on an outer surface of the printed circuit board, the first foil trace electrically coupling the at least one switching device to the first end of the winding. - View Dependent Claims (37, 38, 39, 40)
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41. A printed circuit board assembly, comprising:
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a printed circuit board; at least one switching device attached to the printed circuit board; and an inductor attached to the printed circuit board, the inductor including; a core formed of a magnetic material; and a foil winding wound at least partially around or through at least a portion of the core, a first end of the winding electrically coupled to the at least one switching device, a second end of the winding extending away from the core to form an extended output tongue, at least a portion of the extended output tongue soldered to and supplementing a first foil trace disposed on an outer surface of the printed circuit board. - View Dependent Claims (42, 43, 44)
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Specification