Paralleling SMD Semiconductor Switching Cells in a Flying Capacitor Converter System

In this paper, the parallel arrangement of SMD semiconductor devices for example in a flying capacitor topology is addressed. A concept of alternating arranged switching cells is proposed, in which the magnetic field is naturally cancelled. This enables a proper current sharing in the devices during the switching transition, which is shown by measurements. This concept is applicable for any parallel arrangement of semiconductor devices to improve the current sharing also in dynamic cases as e.g. the switching transitions.