Multiphase buck converters with integrated coupled inductors and controllable coupling

A multiphase buck power converter, comprising:

• a plurality of buck converter stages;
• and
• an integrated coupled inductor for the plurality of buck converter stages, the integrated coupled inductor comprising:
• a first magnetic core comprising side legs;
• a second magnetic core comprising side legs;
• a first winding for a first buck converter stage among the plurality of buck converter stages, the first winding extending around the first magnetic core;
• a second winding for a second buck converter stage among the plurality of buck converter stages, the second winding extending around the first magnetic core;
• a third winding for a third buck converter stage among the plurality of buck converter stages, the first winding extending around the second magnetic core;
• a fourth winding for a fourth buck converter stage among the plurality of buck converter stages, the fourth winding extending around the second magnetic core;
• and
• a coupling winding extending around the magnetic core and the second magnetic core.

A power converter, comprising:

• a plurality of converter stages;
• and
• an integrated coupled inductor for the plurality of converter stages, the integrated coupled inductor comprising:
• a first magnetic core comprising a first side leg, a center leg, a first side leg segment, and a second side leg segment;
• a first winding for a first converter stage among the plurality of converter stages, the first winding extending around the center leg of the first magnetic core;
• a second magnetic core comprising a first side leg, a center leg, a first side leg segment, and a second side leg segment;
• a second winding for a second converter stage among the plurality of converter stages, the second winding extending around a center leg of the second magnetic core;
• and
• a coupling winding extending around the center leg and the first side leg segment of the first magnetic core and around the center leg and the first side leg segment of the second magnetic core.