Power supply module and transformer power supply device

A power supply module for powering an intelligent IC on a system board, comprising:

• a third power supply submodule disposed on an upper surface of the system board and comprising:
• a first switch,
• a first magnetic column, and
• a first winding portion wound around the first magnetic column;
• a fourth power supply submodule disposed on a lower surface of the system board and being opposite to the third power supply submodule, comprising:
• a second switch,
• a second magnetic column, and
• a second winding portion wound around the second magnetic column;
• a plurality of first pins on a lower surface of the third power supply submodule;
• a plurality of second pins on an upper surface of the fourth power supply submodule;
• and
• a second winding unit comprising:
• a third winding portion disposed on or in the system board and below the first magnetic column and connected to the first winding portion via at least a part of the plurality of first pins to form a first winding, and
• a fourth winding portion disposed on or in the system board and above the second magnetic column and connected to the second winding portion via at least a part of the plurality of second pins to form a second winding;
• wherein the first magnetic column, the second magnetic column, at least the first winding, and the second winding form a magnetic element, and wherein the first switch and the second switch are disposed on and electrically connected to the magnetic element.