Abstract: A magnetic core-coil device includes: a printed circuit board having a stack of plate layers, a loop-shaped magnetic core, a primary winding, and an auxiliary winding. The loop-shaped magnetic core has two side portions extending through two rows of through holes of the printed circuit board. The primary winding includes a plurality of primary coil sections formed respectively on the plate layers and each looping around one of the side portions. The auxiliary winding includes a plurality of auxiliary coil sections formed respectively on the plate layers and each looping around the other one of the side portions. A method for making the magnetic core-coil device is also disclosed.

Abstract: An inductor includes: an inductive coil having a coil portion and two extension legs; a magnetic pillar including a pillar portion that is inserted into the coil portion and that has an upper end projecting upwardly from the inductive coil, and a flange portion radially projecting from the upper end of the pillar portion, the flange portion pressing against an upper end of the coil portion; and an embedding body in which the coil portion and the magnetic pillar are embedded, the extension legs being exposed from the embedding body.