Transformer module and power module

A transformer module, comprising:

• a magnetic core, wherein a first wiring layer, a first insulating layer and a second wiring layer are sequentially disposed on the magnetic core from inside to outside;
• a first metal winding, wound around the magnetic core, and comprising a first winding segment formed in the first wiring layer and a second winding segment formed in the second wiring layer, wherein, a first end of the first winding segment is electrically connected to a first pin through a first connector, and a second end of the first winding segment is electrically connected to a second pin through a second connector, both of the first connector and the second connector pass through the first insulating layer, a first end of the second winding segment forms a third pin, a second end of the second winding segment forms a fourth pin;
• and
• a second metal winding, wound around the magnetic core, comprising a third winding segment formed in the first wiring layer and a fourth winding segment formed in the second wiring;
• wherein, and a first end of the third winding segment is electrically connected to a fifth pin through a third connector, and a second end of the third winding segment is electrically connected to the second pin through a fourth connector;
• both of the third connector and the fourth connector pass through the first insulating layer;
• a first end of the fourth winding segment forms a sixth pin,
• wherein at least part of the first metal winding and the second metal winding are wound around the magnetic core in a foil structure;
• wherein the dimension of the winding parallel to the longitudinal direction of the magnetic column is W, the thickness of the winding which is the dimension of the winding vertical to the magnetic column of the magnetic core is H, when H and W satisfy the relationship:
• W>10H, the winding has the foil structure.