Tight magnetic coupling in multiphase interleaved converters based on simple transformers

Magnetic integration and magnetic coupling are very promising concepts to be applied in multiphase converters. Tight magnetic coupling allows energy transfer among phases. Ideally the magnetic component can act as a voltage source, with very low output impedance and with a perfect sharing of output current ripple. The main advantages provided by magnetic coupling are size and losses reduction and dynamic improvement. In this paper two winding transformer arrangements to be used in multiphase converters are presented, and validated with a new integrated transformer.