Current sharing in multiphase zero-voltage transition boost converter

The zero-voltage transition (ZVT) boost converter has been analysed and a complete model has been obtained. It has been checked it behaves as a voltage source with high impedance and, because of this property, it is a valid topology for multiphase design, where different stages will share load in a passive way, without any extra mechanism or components to achieve load sharing. The design of multiphase converters is simplified, especially for a big number of phases, as no extra information must be processed. Steady-state current sharing has been studied and how components tolerances will affect to current distribution. A simple design guide to select different components has been detailed. To test passive current sharing a two-phase 600 W prototype has been built and it has been tested in open loop. This has been done to prove that without control loop or extra components there is load sharing when ZVT converters are connected in parallel.