Multiple-phase, multi-module power supply system for high frequency operation

A multiple-phase power converter, comprising:

• a first non-isolated, double-ended transformer having a plurality of windings;
• a first high-side portion including a first power switch connecting an input voltage source (VIN) to a first virtual phase node through a first winding of said first transformer and a second power switch connecting said input voltage source to said first virtual phase node through a second winding of said first transformer, said first and second windings being arranged with opposite polarity;
• a first low-side portion including a third power switch connecting said first virtual phase node to ground through a third winding of said first transformer and a fourth power switch connecting said first virtual phase node to ground through a fourth winding of said first transformer, said third and fourth windings being arranged with opposite polarity;
• a first output portion including a first output inductor connecting said first virtual phase node to an output terminal providing an output voltage (VOUT);
• a second non-isolated, double-ended transformer having a plurality of windings;
• a second high-side portion including a first power switch connecting said input voltage source to a second virtual phase node through a first winding of said second transformer and a second power switch connecting said input voltage source to said second virtual phase node through a second winding of said second transformer, said first and second windings being arranged with opposite polarity;
• a second low-side portion including a third power switch connecting said second virtual phase node to ground through a third winding of said second transformer and a fourth power switch connecting said second virtual phase node to ground through a fourth winding of said second transformer, said third and fourth windings being arranged with opposite polarity;
• a second output portion including a second output inductor connecting said second virtual phase node to said output terminal providing said output voltage;
• and
• a controller adapted to control operations of said first, second, third, fourth, power switches of said first high and low-side portions and said first, second, third, and fourth power switches of said second high and low-side portions such that said first and second power switches of said first high-side portion and said first and second power switches of said second high-side portion are enabled in respective alternating phases, said third switch of said first low-side portion being disabled when said second switch of said first high-side portion is enabled so that current flows concurrently through both said second and fourth windings of said first transformer to said output inductor, said fourth switch of said first low-side portion being disabled when said first switch of said first high-side portion is enabled so that current flows concurrently through both said first and third windings of said first transformer to said output inductor, said third switch of said second low-side portion being disabled when said second switch of said second high-side portion is enabled so that current flows concurrently through said second and fourth windings of said second transformer to said output inductor, and said fourth switch of said second low-side portion being disabled when said first switch of said second low-side portion is enabled so that current flows concurrently through said first and third windings of said second transformer to said output inductor.