A common transformer used with an electric vehicle that includes a transformer core configured to receive electrical windings from a plurality of electrical circuits; an alternating current (AC) synchronous rectification (SR) circuit electrically connected to the transformer core via an AC winding; a high-voltage SR DC circuit electrically connected to the transformer core via a high-voltage DC winding; and a low-voltage DC SR circuit electrically connected to the transformer core via a low-voltage DC winding.

In examples, a transformer device comprises a first magnetic member; a second magnetic member; and a substrate layer between the first and second magnetic members. The substrate layer comprises a transformer coil. The transformer device includes a third magnetic member inside the substrate layer. The transformer coil encircles the third magnetic member. The third magnetic member physically separates from the first and second magnetic members.

An electronic device includes a substrate, a first insulating film on the substrate, a second insulating film on the first insulating film, first and second coils respectively in the first and second insulating films, first and second terminals, and first and second connection conductors. The first and second insulating films contact each other so that the first and second coils are magnetically coupled. The first insulating film includes a first non-contact portion not contacting the second insulating film. One of the first and second insulating films includes a second non-contact portion not contacting the first or second insulating film. The first terminal is provided on the first non-contact portion and electrically connected to the first coil. The second terminal is provided on the second non-contact portion and electrically connected to the second coil. The first and second connection conductors are connected to the first and second terminals, respectively.

Power converters with current doubler rectifier output stages, current doubler rectifier output stages, and integrated transformers for current doubler rectifier output stages and related output stages are described. In one example, a power converter includes a switched bridged input stage and a current doubler rectifier output stage comprising an integrated transformer. The integrated transformer of the current doubler rectifier output stage includes magnetic cores. A primary winding and a secondary winding of the integrated transformer extend around each of the plurality of magnetic cores, and the integrated transformer further includes a coupling winding that extends around each of the plurality of magnetic cores to provide magnetic integration among the plurality of magnetic cores through an electrical coupling. The current doubler rectifier output stage relies upon magnetizing inductance of the integrated transformer to realize the function of inductors, and the integrated transformer current doubler rectifier does not include separate inductors.

A voltage regulator module includes a circuit board assembly and a magnetic core assembly. The circuit board assembly includes a circuit board and 2N switching circuits. The circuit board includes a plurality of conductive structures. The magnetic core assembly includes an upper core, a lower core and 2N lateral legs. The 2N lateral legs are arranged between the upper core and the lower core. The 2N lateral legs are penetrated through the corresponding conductive structures. The 2N switching circuits are divided into N switching circuit groups. Each switching circuit group includes two parallel-connected switching circuits. The N switching circuit groups and the magnetic core assembly are arranged on the circuit board along a first direction. The N switching circuit groups are arranged one the circuit board along a second direction.

A planar transformer is disclosed. The disclosed planar transformer includes: a magnetic core; a first coil unit formed in a conductor pattern in a plurality of layers stacked in the magnetic core; a second coil unit formed in a conductor pattern in the plurality of layers stacked in the magnetic core; an electromagnetic interference (EMI) reduction unit disposed on the output end of the second coil unit; and a base for accommodating the magnetic core and the coil units.

A space efficient planar transformer can include a coupled inductor circuit that can include a metallic core, a first planar winding comprising a conductive coil having an electrical path encircling a first post of the metallic core, and a second planar winding configured to magnetically couple with the first winding via the metallic core. The second planar winding can have multiple portions. A portion of the second winding can include a first sub-portion comprising a single U-shaped planar conductive trace wrapped about the first post and a second sub-portion comprising a single U-shaped planar conductive trace wrapped about the first post. A layout of the first sub-portion can be oriented opposite a layout of the second sub-portion.

Techniques are provided for a multiple-layer planar transformer having center taps of a segmented winding. In an example, a multiple-layer planar transformer can be a coupled inductor circuit including a first winding comprising a conductive coil having an electrical path defining and encircling the central axis, a second winding configured to magnetically couple with the first winding, the second winding having a plurality of individual segments, wherein each individual segment forms a fraction of one turn of the second winding, and a first output inductor coupled to a first common node of the second winding. The first common node can directly couple a first node of a first individual segment of the plurality of individual segments with a first node of a second individual segment of the plurality of individual segments.

A device including a first voltage domain and a second voltage domain is provided, the voltage domains being separated by an isolation barrier. In addition, the device includes a scratch detection circuit including a first and a second electrode at a distance of less than 2 μm.

An on-chip transformer circuit is disclosed. The on-chip transformer circuit comprises a primary winding circuit comprising at least one turn of a primary conductive winding arranged as a first N-sided polygon in a first dielectric layer of a substrate; and a secondary winding circuit comprising at least one turn of a secondary conductive winding arranged as a second N-sided polygon in a second, different, dielectric layer of the substrate. In some embodiments, the primary winding circuit and the secondary winding circuit are arranged to overlap one another at predetermined locations along the primary conductive winding and the secondary conductive winding, wherein the predetermined locations comprise a number of locations less than all locations along the primary conductive winding and the secondary conductive winding.