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LinearLTC3588-1压电能量收集电源方案关键字：电源管理,能量收集器,DC/DC转换器Linear公司的LTC3588-1是压电能量收集电源,集成了低噪音全波整流和高效降压转换器,组成完整的能量收集解决方案,最适合高输出阻抗的能量源如压电传感器.输入电压2.7V-20V,输出电流高达100mA,可选输出电压1.8V,2.5V,3.3V和3.6V,可用于压电能量收集,电-机械能量收集,无线HVAC传感器,轮胎压里传感器,遥控光开关,毫微瓦降压稳压器.本文介绍LTC3588-1主要特性,方框图以及多种应用电路图,包括100mA压电能量收集电源电路图,最小尺寸的1.8V低压输入压电能量收集电源电路图,电场能量和热电能量收集器电路图等.LTC3588-1:PiezoelectricEnergyHarvestingPowerSupplyTheLTC.3588-1integratesalow-lossfull-wavebridgerectifierwithahighefficiencybuckconvertertoformacompleteenergyharvestingsolutionoptimizedforhighoutputimpedanceenergysourcessuchaspiezoelectrictransducers.Anultralowquiescentcurrentundervoltagelockout(UVLO)modewithawidehysteresiswindowallowschargetoaccumulateonaninputcapacitoruntilthebuckconvertercanefficientlytransferaportionofthestoredchargetotheoutput.Inregulation,theLTC3588-1entersasleepstateinwhichbothinputandoutputquiescentcurrentsareminimal.Thebuckconverterturnsonandoffasneededtomaintainregulation.Fouroutputvoltages,1.8V,2.5V,3.3Vand3.6V,arepinselectablewithupto100mAofcontinuousoutputcurrent;however,theoutputcapacitormaybesizedtoserviceahigheroutputcurrentburst.Aninputprotectiveshuntsetat20Venablesgreaterenergystorageforagivenamountofinputcapacitance.LTC3588-1主要特性:950nAInputQuiescentCurrent(OutputinRegulation–NoLoad)450nAInputQuiescentCurrentinUVLO2.7Vto20VInputOperatingRangeIntegratedLow-LossFull-WaveBridgeRectifierUpto100mAofOutputCurrentSelectableOutputVoltagesof1.8V,2.5V,3.3V,3.6VHighEfficiencyIntegratedHystereticBuckDC/DCInputProtectiveShunt–Upto25mAPull-DownatVIN≥20VWideInputUndervoltageLockout(UVLO)RangeAvailablein10-LeadMSEand3mmx3mmDFNPackagesLTC3588-1应用:PiezoelectricEnergyHarvestingElectro-MechanicalEnergyHarvestingWirelessHVACSensorsMobileAssetTrackingTirePressureSensorsBatteryReplacementforIndustrialSensorsRemoteLightSwitchesStandaloneNanopowerBuckRegulator图1.LTC3588-1方框图图2.LTC3588-1100mA压电能量收集电源电路图图3.LTC3588-13.3V压电能量收集电源电路图:给带无线发送器的微处理器和50mA瞬态负载供电.图4.最小尺寸的1.8V低压输入压电能量收集电源电路图图5.采用单个压电晶体和自动加电次序的双电源电路图图6.带备份电池的压电能量收集器电路图图7.AC火线供电的3.6V降压稳压器,大输出电容支持重负载图8.电场能量收集器电路图图9.5-16V太阳能供电的2.5V电源,其超大电容增加输出能量存储和备份电池图10.热电能量收集器电路图