ACS761ELF-20B-T12V高端熱插拔基于霍爾效應的電流監(jiān)視器 12VHigh-SideHot-SwapHallEffectBasedCurrentMonitor FeaturesHall-effectcurrentmonitor noexternalsenseresistorrequiredPGOODandPGOODindicationAnalogoutputvoltage(factorytrimmedforgainandoffset)proportionaltoappliedcurrentExternalhigh-sideFETgatedrive240V*Apowerfaultprotectionwithuser-selectabledelayOvercurrentfaultprotectionwithuser-selectabledelayFaultprotectionisolatesfailedsupplyfromoutputin 2 s1.5m internalconductorresistanceActivelowlatchedFaultindicatoroutputsignalUsercontrolledsoftstart/hot-swapfunctionLogicenableinputpin10.8to13.2 V,single-supplyoperation2 kVESDprotectionforallpinsDescriptionTheACS761combinesAllegro Hall-effectcurrentsensetechnologywithahot-swapcontrollerresultinginamoreefficientintegratedcontrollerfor12 Vapplications.Byeliminatingtheneedforashuntresistor,theI2Rlossesinthepowerpatharereduced.WhentheACS761isexternallyenabled,andthevoltagerailisabovetheinternalUVLOthreshold,theinternalchargepumpdrivesthegateoftheexternalFET.WhentheloadvoltagereachesitstargetvaluePGOODisassertedhigh.Whenafaultisdetected,thegateisdisabledwhilesimultaneouslyalertingtheapplicationthatafaulthasoccurred.TheintegratedprotectionintheACS761incorporatesthreelevelsoffaultprotection,whichincludesaPowerFaultwithuser-selectabledelay,anOvercurrentFaultthresholdwithuserselectabledelay,andShortCircuitprotection,whichdisablesthegateinlessthan2 s.ThesefaultsareindicatedtothehostsystemviatheFaultpinandarecleareduponreassertingenablehigh.MinimumOrderValue:Estimatedannualvolumemustbe 100,000unitsFunctionalBlockDiagram