Linear LTC3588-1压电能量收集电源方案.doc

Linear LTC3588-1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: Piezoelectric Energy Harvesting Power SupplyThe LTC.3588-1 integrates a low-loss full-wave bridge rectifier with a high efficiency buck converter to form a complete energy harvesting solution optimized for high output impedance energy sources such as piezoelectric transducers. An ultralow quiescent current undervoltage lockout (UVLO) mode with a wide hysteresis window allows charge to accumulate on an input capacitor until the buck converter can effi ciently transfer a portion of the stored charge to the output. In regulation, the LTC3588-1 enters a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation.Four output voltages, 1.8V, 2.5V, 3.3V and 3.6V, are pin selectable with up to 100mA of continuous output current; however, the output capacitor may be sized to service a higher output current burst. An input protective shunt set at 20V enables greater energy storage for a given amount of input capacitance.LTC3588-1主要特性:950nA Input Quiescent Current (Output in Regulation No Load)450nA Input Quiescent Current in UVLO2.7V to 20V Input Operating RangeIntegrated Low-Loss Full-Wave Bridge RectifierUp to 100mA of Output CurrentSelectable Output Voltages of 1.8V, 2.5V, 3.3V, 3.6VHigh Efficiency Integrated Hysteretic Buck DC/DCInput Protective Shunt Up to 25mA Pull-Down at VIN 20VWide Input Undervoltage Lockout (UVLO) RangeAvailable in 10-Lead MSE and 3mm x3mm DFN PackagesLTC3588-1应用:Piezoelectric Energy HarvestingElectro-Mechanical Energy HarvestingWireless HVAC SensorsMobile Asset TrackingTire Pressure SensorsBattery Replacement for Industrial SensorsRemote Light SwitchesStandalone Nanopower Buck Regulator图1.LTC3588-1方框图图2.LTC3588-1 100mA压电能量收集电源电路图图3.LTC3588-1 3.3V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