使用的TC647风扇管理冗余风扇系统

Certainapplications,suchasfileservers,require

redundantcoolingfanstoensureuninterruptedsystem

service,evenwithcoolingfanmalfunctionspresent.

Typically,suchsystemshaveaprimaryfantocoolthe

systemandoneormore“standby”fansthatareauto-

maticallyplacedintoserviceshouldtheprimaryfanfail.

MultipleTC647scanbeusedtoimplementsucha

systemasshowninFigure1.MAN768RedundantFanSystemsUsingtheTC647FanManagerShouldafanfaultoccurinUnit1(fanstopsrotating),Author:MicrochipTechnologyInc.theUnit1FAULToutputwillbedrivenlow.ThisactstoturnQ2off,whichwillactivatetheTC647inUnit2.INTRODUCTIONUnit2willnowrespondtotheVINvoltageaslongas