SPV太阳能电池充电解决方案

ST企业旳SPV1040是嵌入了MPPT旳高效太阳能电池充电器,输入电压0.3V到5.5V,内部集成140mΩ同步整流器,120mΩ功率开关,100kHz固定PWM频率,占空比有MPPT算法来控制,输出电压具有稳压,过流和超温保护.本文简介了SPV1040重要特性,方框图,经典应用电路,输出并联和串联连接图,以及太阳能电池充电器STEVAL-ISV006V2电路图和材料清单与PCB布局图.

SPV1040重要特性:

■0.3Vto5.5Voperatinginputvoltage

■140mΩinternalsynchronousrectifier

■120mΩinternalpoweractiveswitch

■100kHzfixedPWMfrequency

■DutycyclecontrolledbyMPPTalgorithm

■Outputvoltageregulation,overcurrentandovertemperatureprotection

■Inputsourcereversepolarityprotection

■Builtinsoft-start

■Upto95%efficiency

■3mmx4.4mmTSSOP8package

SPV1040应用:

■SmartphonesandGPSsystems

■Wirelessheadsets

■Smallappliances,sensors

■Portablemediaplayers

■Digitalstillcameras

■Toysandportablehealthcare

图1.SPV1040方框图

图2.SPV1040简化应用电路图

图3.SPV1040输出并联连接图

图4.SPV1040输出串联连接图

采用SPV1040旳太阳能电池充电器STEVAL-ISV006V2

STEVAL-ISV006V2:solarbatterychargerusingtheSPV1040

TheSPV1040isahighefficiency,lowpowerandlowvoltageDC-DCconverterthatprovidesasingleoutputvoltageupto5.2V.Startupisguaranteedat0.3Vandthedeviceoperatesdownto0.45VwhencomingoutfromMPPTmode.Itisa100kHzfixedfrequencyPWMstep-up(orboost)converterabletomaximizetheenergygeneratedbyfewsolarcells(polycrystallineoramorphous).ThedutycycleiscontrolledbyanembeddedunitrunninganMPPTalgorithmwiththegoalofmaximizingthepowergeneratedfromthepanelbycontinuouslytrackingitsoutputvoltageandcurrent.

TheSPV1040guaranteesthesafetyofoverallapplicationandofconverteritselfbystoppingthePWMswitchinginthecaseofanovercurrentorovertemperaturecondition.

TheICintegratesa120mΩN-channelMOSFETpowerswitchanda140mΩP-channel

MOSFETsynchronousrectifier.

图5.采用SPV1040旳经典应用电路

图6.太阳能电池充电器STEVA