理想二极管桥驱动器

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1、LT4320/LT4320-1IdealDiodeBridgeControllerFeaturesDescriptionnMaximizesPowerEfficiencyTheLT®4320/LT4320-1areidealdiodebridgecontrollersnEliminatesThermalDesignProblemsthatdrivefourN-channelMOSFETs,supportingvoltagenDCto600HzrectificationfromDCto600Hzty

2、pical.Bymaximizingn9Vto72VOperatingVoltageRangeavailablevoltageandreducingpowerdissipation(seenIQ=1.5mA(Typical)thermographcomparisonbelow),theidealdiodebridgenMaximizesAvailableVoltagesimplifiespowersupplydesignandreducespowersupplynAvailablein8-Lead

3、(3mm×3mm)DFN,12-Leadcost,especiallyinlowvoltageapplications.MSOPand8-LeadPDIPPackagesAnidealdiodebridgealsoeliminatesthermaldesignapplicationsproblems,costlyheatsinks,andgreatlyreducesPCboardarea.TheLT4320’sinternalchargepumpsupportsanall-nSecurityCam

4、erasNMOSdesign,whicheliminateslargerandmorecostlynTerrestrialorAirbornePowerDistributionSystemsPMOSswitches.Ifthepowersourcefailsorisshorted,anPower-over-EthernetPoweredDevicewithafastturn-offminimizesreversecurrenttransients.SecondaryInputTheLT4320is

5、designedforDCto60HztypicalvoltagenPolarity-AgnosticPowerInputrectification,whiletheLT4320-1isdesignedforDCtonDiodeBridgeReplacement600Hztypicalvoltagerectification.HigherfrequenciesofL,LT,LTC,LTM,LinearTechnologyandtheLinearlogoareregisteredtrademarks

6、ofLinearoperationarepossibledependingonMOSFETsizeandTechnologyCorporation.Allothertrademarksarethepropertyoftheirrespectiveowners.Patentpending.operatingloadcurrent.typicalapplicationThermographofPassiveDiodeBridge+TemperatureRiseOUTPDIODETG1TG2MOSFET

7、SBMCURRENT2.5mΩ1040LT43204320TA01b~OUTPUTSBM1040(×4)2A0.6°C15°CIN1IN29VTO72VThermographofLT43204A3.5°C32°CBG2BG1DrivingFourMOSFETs6A6.7°C49°COUTN8A11°C66°CINPUT10A16°C84°CDCTO600Hz(TYP)DCInput,OnSamePCB–~4320TA01a4320TA01cLT4320+2.5mFET(×4)CONDITIONS

8、:24VACIN,9.75ADCLOADONSAMEPCB4320fbFormoreinformationwww.linear.com/LT43201LT4320/LT4320-1absoluteMaxiMuMratings(Notes1,2)SupplyVoltagesOperatingJunctionTemperatureRangeIN1,IN2....................................................–3Vto80VLT4320I