支持中間總線體系結(jié)構(gòu)設(shè)計(jì)的電源模塊和設(shè)備

　　近三年前，“磚”直流/直流轉(zhuǎn)換器電源模塊的開發(fā)，最終導(dǎo)致分布式電源架構(gòu)（DPA）成為事實(shí)上的標(biāo)準(zhǔn)點(diǎn)的負(fù)荷（設(shè)計(jì)）。很快，成本和電路板的足跡就成了問題，設(shè)計(jì)師們?yōu)樗麄兊?a target='_blank' class='arckwlink_none'>電源管理架構(gòu)尋找替代的解決方案。

　　本文將討論最近出現(xiàn)的一種流行的電源架構(gòu)，作為解決設(shè)計(jì)者問題的方法之一，中間總線體系結(jié)構(gòu)（IBA）。

　　為了處理DPA的大小和成本限制，第二代系統(tǒng)移動(dòng)到固定電壓中間總線架構(gòu)或IBA（圖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.