Dynamic Characterization of Power Converters for Distributed Power Supply

The lasts generations of microprocessors have shown an increase in the operating frequency and, of course, in the supply characteristics. The different need of power requested made necessary new solution for the distributed power supply architectures (DPA) and claimed the use of converters suitable to meet the new high efficiency and high power exigencies. This paper is focused on the design and dynamic characterization of a DC-DC converter specifically devoted for telecom/networking/computing applications: a Switch in Line Converter (SILC). Its analysis has been obtained by means of a dedicated automatic tool, FREDOMSIM, and accomplished over its whole operating area: with different output power and load typologies (resistive, current sink and constant power). The proposed power cell exhibits a pseudo-first order dynamics, optimum for the design of an external feedback network characterized by large stability margins for all the operative conditions. Comparisons with the experimental data, given in the paper, will confirm the predictions.