SPV太陽能電池充電解決方案

ST企業(yè)旳SPV1040是嵌入了MPPT旳高效太陽能電池充電器,輸入電壓0.3V到5.5V,內(nèi)部集成140mΩ同步整流器,120mΩ功率開關(guān),100kHz固定PWM頻率,占空比有MPPT算法來控制,輸出電壓具有穩(wěn)壓,過流和超溫保護(hù).本文簡(jiǎn)介了SPV1040重要特性,方框圖,經(jīng)典應(yīng)用電路,輸出并聯(lián)和串聯(lián)連接圖,以及太陽能電池充電器STEVAL-ISV006V2電路圖和材料清單與PCB布局圖.

SPV1040重要特性:

■0.3Vto5.5Voperatinginputvoltage

■140mΩinternalsynchronousrectifier

■120mΩinternalpoweractiveswitch

■100kHzfixedPWMfrequency

■DutycyclecontrolledbyMPPTalgorithm

■Outputvoltageregulation,overcurrentandovertemperatureprotection

■Inputsourcereversepolarityprotection

■Builtinsoft-start

■Upto95%efficiency

■3mmx4.4mmTSSOP8package

SPV1040應(yīng)用:

■SmartphonesandGPSsystems

■Wirelessheadsets

■Smallappliances,sensors

■Portablemediaplayers

■Digitalstillcameras

■Toysandportablehealthcare

圖1.SPV1040方框圖

圖2.SPV1040簡(jiǎn)化應(yīng)用電路圖

圖3.SPV1040輸出并聯(lián)連接圖

圖4.SPV1040輸出串聯(lián)連接圖

采用SPV1040旳太陽能電池充電器STEVAL-ISV006V2

STEVAL-ISV006V2:solarbatterychargerusingtheSPV1040

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

TheSPV1040guaranteesthesafetyofoverallapplicationandofconverteritselfbystoppingthePWMswitchinginthecaseofanovercurrentorovertemperaturecondition.

TheICintegratesa120mΩN-channelMOSFETpowerswitchanda140mΩP-channel

MOSFETsynchronousrectifier.

圖5.采用SPV1040旳經(jīng)典應(yīng)用電路

圖6.太陽能電池充電器STEVA