Power module and power device

A power device, comprising:

• a mainboard;
• at least one power module disposed on the mainboard with a first direction corresponding to a direction from an input terminal to an output terminal of the power device, each of the at least one power module comprising:
• a first printed circuit board (PCB);
• a magnetic element disposed on the first PCB, wherein the magnetic element has a first side, a second side, a third side and a fourth side, wherein the second side is opposite to the first side along a first direction, the fourth side is opposite to the third side along a second direction different from the first direction;
• a primary winding circuit disposed on the first PCB and positioned in a vicinity of the first side or the second side of the magnetic element;
• and
• a secondary winding circuit disposed on the first PCB and positioned in a vicinity of the third side or the fourth side of the magnetic element;
• and
• a regulator disposed on the mainboard, and arranged with the at least one power module in the first direction and configured to provide at least one voltage to the at least one power module,
• wherein along the second direction, the primary winding circuit is disposed between two boundaries of the first PCB.