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支持中间总线体系结构设计的电源模块和设备
近三年前，“砖”直流/直流转换器电源模块的开发，最终导致分布式电源架构（DPA）成为事实上的标准点的负荷（设计）。很快，成本和电路板的足迹就成了问题，设计师们为他们的电源管理架构寻找替代的解决方案。
本文将讨论最近出现的一种流行的电源架构，作为解决设计者问题的方法之一，中间总线体系结构（IBA）。
为了处理DPA的大小和成本限制，第二代系统移动到固定电压中间总线架构或IBA（图1）。
An IBA uses a single， isolated-brick， regulated power module and numerous non-isolated， point-of- load （POL） DC/DC converters. The POLs can be either power modules， such as the Texas Instruments （TI） PTH05010 series and the Emerson Network Power PTH12010 series （both part of the second source Point of Load Alliance）， micro-modules like Linear Technology’s LTM4604， or discrete buck converters such as theMaxim MAX1920 series 。
In many applicaTIons， the IBA-based power system includes a front-end AC/ DC power supply with a typical output of 24 V （such as CUI’s VOF-6-24） or 48 V （such as CUI’s VSK-S15-48U）。 In some data communicaTIons and medical equipment， the input DC voltage can be from a 400 V power-factor-corrector block. This voltage is supplied to an intermediate bus converter （IBC） that provides isolaTIon and conversion to the lower-level intermediate bus voltage， typically ranging from 5 to 14 V. This intermediate bus voltage is supplied to nonisolated POL regulators that provide high-quality voltages for a variety of digital and analog electronic blocks.
