Transformer and electronic modules including a transformer

A circuit board module comprising:

• a printed circuit board including a first main surface and a second main surface that are opposed to each other in a thickness direction of the printed circuit board;
• and
• a plurality of transformers integrated and mounted on the printed circuit board;
• wherein each of the plurality of transformers includes:
• a primary winding provided in the printed circuit board;
• a secondary winding defined by a first copper stamp provided on the first main surface of the printed circuit board and a second copper stamp provided on the second main surface of the printed circuit board;
• and
• a magnetic core;
• wherein
• in each of the plurality of transformers:
• the primary winding is sandwiched by the first copper stamp and the second copper stamp;
• a first portion of the magnetic core extends through a coil opening of each of the primary winding and the secondary winding in the thickness direction;
• a second portion of the magnetic core overlaps with each of the primary winding and the secondary winding in the thickness direction;
• a third portion of the magnetic core extends through a first cutout of the printed circuit board in the thickness direction;
• and
• a fourth portion of the magnetic core extends through a second cutout of the printed circuit board in the thickness direction.

An electronic module comprising:

• a substrate including a substrate opening and first and second cutouts;
• an electronic component located on the substrate;
• and
• a transformer connected to the electronic component and including:
• a primary winding on or in the substrate that extends around the substrate opening;
• a secondary winding connected to the substrate and including first and second stamps on opposing sides of the substrate, each of the first and the second stamps includes a stamp opening;
• and
• a magnetic core that extends through the substrate opening, through the second and the third cutouts, and through each stamp opening in the first and the second stamps.