LOW PROFILE INDUCTORS FOR HIGH DENSITY CIRCUIT BOARDS

摘要

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.

主权项

1. A printed circuit board assembly including a drop-in inductor attached to a printed circuit board, the drop-in inductor, comprising:
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.