DC/DCコンバータ技術の最新動向-低電圧大電流負荷システムに適した中間バスアーキテクチャを例として-

摘要

The Intermediate Bus Architecture (IBA) is a state-ofthe-art architecture that achieves small, highly efficient, and low-cost power systems by distributing power converters to bus and PoL (Point of Load) converters.The functions of bus converters are insulation and voltage conversion and they can attain high efficiency,because they do not require a voltage-control system. The latest bus converters can operate at the megahertz switching frequency using resonant technology to reduce switching losses. The transient performance of PoL converters is important, because their output reaches a lower voltage and a higher current.Therefore, technologies to control PoL converters and achieve high-frequency operation are essential. The core loss of the magnetic components for these two kinds of converters is one of the critical issues with increases in switching frequency.