Linear LTC4282大电流100A热插拔控制方案

LinearLTC4282大电流100A热插拔控制方案Linear公司的LTC4282是大电流100A热插拔控制器,应用电压从2.9V到33V.采用一个或多个N沟通过晶体管,允许板从安全地插入和拔出带电的背板.器件包括12/16位ADC,误差±0.7%,采用I2C接口可监测电流,电压和功率与能量,内部的EEPROM用来非易失性配置,主要用在企业服务器和数据存储系统,网络路由器和交换,基站和平台管理.本文介绍了LTC4282主要特性,框图,几种应用电路,以及演示板DC2024A主要特性,电路图,材料清单和PCB元件布局图.TheLTC.4282HotSwap™controllerallowsaboardtobesafelyinsertedandremovedfromalivebackplane.UsingoneormoreexternalN-channelpasstransistors,boardsupplyvoltageandinrushcurrentarerampedupatanadjustablerate.AnI2CinterfaceandonboardADCallowsformonitoringofboardcurrent,voltage,power,energyandfaultstatus.Thedevicefeaturesanalogfoldbackcurrentlimitingandsupplymonitoringforapplicationsfrom2.9Vto33V.Dual12VgatedriveallowshighpowerapplicationstoeithersharesafeoperatingareaacrossparallelMOSFETsorsupporta2-stagestart-upthatfirstchargestheloadcapacitancefollowedbyenablingalowon-resistancepathtotheload.TheLTC4282iswellsuitedtohighpowerapplicationsbecausetheprecisemonitoringcapabilityandaccuratecurrentlimitingreducetheextremesinwhichbothloadsandpowersuppliesmustsafelyoperate.Non-volatileconfigurationallowsforflexibilityintheautonomousgenerationofalertsandresponsetofaults.LTC4282主要特性:AllowsSafeBoardInsertionIntoLiveBackplane12-/16-BitADCwith±0.7%TotalUnadjustedErrorMonitorsCurrent,Voltage,PowerandEnergyControlsTwoParallelN-ChannelMOSFETsforHighCurrentApplicationsInternalEEPROMforNonvolatileConfigurationWideOperatingVoltageRange:2.9Vto33VI2C/SMBusDigitalInterface(CoexistswithPMBusDevices)12VGateDriveforLowerMOSFETRDS(ON)ProgrammableCurrentLimitwith2%AccuracyMOSFETPowerLimitingwithCurrentFoldbackContinuouslyMonitorsMOSFETHealthStoresMinimumandMaximumMeasurementsAlertsWhenAlarmThresholdsExceededInputOvervoltage/UndervoltageProtectionThreeGeneralPurposeInput/OutputsInternal±5%orExternalTimebases32-Pin5mm×5mmQFNPackageLTC4282应用:EnterpriseServersandDataStorageSystemsNetworkRoutersandSwitchesBaseStationsPlatformManagement图1.LTC4282框图图2.LTC4282低应力级起动应用电路图图3.LTC4282高应力级起动应用电路图图4.LTC4282单个MOSFET配置图图5.LTC4282设计案例电路图图6.LTC428212V100A背板住宅区应用电路图演示板DC2024ADemonstrationcircuit2024AfeaturestheLTCR4282highcurrentHotSwapcontroller.TheLTC4282iswellsuitedtohighpowerapplicationsbecausetheprecisemonitoringcapabilityandaccuratecurrentlimitingreducestheextremesinwhichbothloadsandpowersuppliesmustsafelyoperate.Non-volatileconfigurationallowsforflexibilityintheautonomousgenerationofalertsandresponsetofaults.TheLTC4282providesarichsetoffeaturestosupportHotSwapapplicationsincluding:12-/16-BitADCMonitorsCurrent,Voltage,PowerandEnergyControlsTwoSetsofParallelMOSFETsforHighCurrentApplicationsI2C/SMBusInterfaceNon-VolatileConfigurationandLoggingFunctionsGeneratesAlertsonADCMeasurementsOutsideLimitsSoftwareAdjustableCurrentLimitwithFoldbackThreeGeneralPurposeInput/OutputsAvailableina32-pin5mm×5mmQFNpackage,theLTC4282isshowcasedonDC2024Aconfiguredfora12V/100Aapplication.TheDC2024A-BhasanincludedprogrammingsockettoallowprogramminganLTC4282forprototypingpurposespriortoitspermanentinstallationonaPCB.TheDC2024A-Adoesnothavethissocket.Bychangingafewpassivecomponents,2.9Vto30Vapplicationscaneasilybeevaluated.AO-Electronics傲壹电子官网：中文网：图7.演示板DC2024A外形图图8.演示板DC2024A电路图(1)图9.演示板DC2024A电路图(2)图10.演示板DC2024A电路图(3)图11.演示板DC2024A电路图(4)演示板DC2024A材料清单(BOM):图12.演示板DC2024APCB元件布局图(正面)图13.演示板DC2024APCB元件布局图(背面)