The present disclosure provides a planar transform component and a planar transform device. The planar transform component includes a winding body including a primary winding and a secondary winding; a primary wiring electrically connected to the primary winding and led out from a first side of the winding body; and a secondary wiring electrically connected to the secondary winding and led out from a second side of the winding body. An extension direction of the secondary wiring is provided at an included angle with a direction from the first side to the third side. The present disclosure can reduce alternating current loss and leakage inductance loss.

Provided is a planar transformer, and more particularly, a planar transformer including: a plurality of primary coil elements included on a flat plate and laminated together; and a plurality of secondary coil elements included on the flat plate and having an induced current generated by the primary coil elements, wherein the plurality of secondary coil elements are respectively disposed above and below the primary coil element.

A magnetic device and an electronic device are provided. The magnetic device includes a magnetic core assembly and a winding assembly. The magnetic core assembly includes a first magnetic cover, a second magnetic cover, a first magnetic leg and a second magnetic leg. The first magnetic leg and the second magnetic leg are between the first magnetic cover and the second magnetic cover. A channel is formed between the first magnetic leg and the second magnetic leg. The winding assembly includes two coupled windings. Each coupled winding includes a first sub-winding, a second sub-winding, a third sub-winding. The first sub-winding goes through the channel. The second sub-winding is wound around the first magnetic leg. The third sub-winding is wound around the second magnetic leg.

An electromagnetic arrangement configured as an integrated resonant capacitor-inductor-inductor-capacitor arrangement includes a first inductor, a second inductor, a first substrate, a second substrate, a first resonance capacitor, and a second resonance capacitor. The first inductor and the first resonance capacitor are disposed on opposite sides on the first substrate and the second inductor and the second resonance capacitor are disposed on opposite sides on the second substrate. A transformer arrangement, a choke arrangement and a charging converter, each including the electromagnetic arrangement, are also provided.

A printed circuit board of a planar transformer includes a first column hole, a second column hole, and a plurality of winding layers. At least one of the winding layers includes a first winding and a second winding connected in series. The first winding surrounds the first column hole and has a first opening direction. The second winding surrounds the second column hole and has a second opening direction. The first opening direction is different from the second opening direction. Consequently, the windings on the plurality of layers may be connected in series through conductive holes of the PCB to increase the number of winding turns.

A transformer device includes: a planar first coil; a first insulation layer being provided above the first coil; an intermediate layer being provided above the first insulation layer; a second insulation layer being provided above the intermediate layer; a planar second coil being provided above the second insulation layer and facing the first coil; and a pad having conductivity being provided above the second insulation layer and being connected to one end side of the second coil. The pad is disposed at a position at least partially overlapping the intermediate layer in plan view. The intermediate layer has hardness higher than hardness of the first insulation layer and the second insulation layer.