STL6470-datasheet意法半导体L6470芯片数据手册

Thisisinformationonaproductinfullproduction.December2012DocID16737Rev51/7070L6470dSPIN™fullyintegratedmicrosteppingmotordriverwithmotionengineandSPIDatasheet−productiondataFeatures■Operatingvoltage:8-45V■7.0Aoutpeakcurrent(3.0Ar.m.s.)■LowRDS(on)PowerMOSFETs■Programmablespeedprofileandpositioning■ProgrammablepowerMOSslewrate■Upto1/128microstepping■Sensorlessstalldetection■SPIinterface■Lowquiescentandstandbycurrents■Programmablenon-dissipativeovercurrentprotectiononhighandlow-side■Two-levelsofovertemperatureprotectionApplications■BipolarsteppermotorsDescriptionTheL6470,realizedinanalogmixedsignaltechnology,isanadvancedfullyintegratedsolutionsuitablefordrivingtwo-phasebipolarsteppermotorswithmicrostepping.ItintegratesaduallowRDS(on)DMOSfull-bridgewithallofthepowerswitchesequippedwithanaccurateon-chipcurrentsensingcircuitrysuitablefornon-dissipativecurrentcontrolandovercurrentprotection.Thankstoauniquecontrolsystem,atrue1/128stepsresolutionisachieved.Thedigitalcontrolcorecangenerateuserdefinedmotionprofileswithacceleration,deceleration,speedortargetposition,easilyprogrammedthroughadedicatedregistersset.Allcommandsanddataregisters,includingthoseusedtosetanaloguevalues(i.e.currentcontrolvalue,currentprotectiontrippoint,deadtime,PWMfrequency,etc.)aresentthroughastandard5-Mbit/sSPI.Averyrichsetofprotections(thermal,lowbusvoltage,overcurrent,motorstall)allowsthedesignofafullyprotectedapplication,asrequiredbythemostdemandingmotorcontrolapplications.HTSSOP28POWERSO36Table1.DevicesummaryOrdercodesPackagePackagingL6470HHTSSOP28TubeL6470HTRHTSSOP28TapeandreelL6470PDPOWERSO36TubeL6470PDTRPOWERSO36Tapeandreel(UVLO).................................296.11Thermalwarningandthermalshutdown.........................296.12Resetandstandby..........................................306.13Externalswitch(SWpin).....................................306.14ProgrammableDMOSslewrate,deadtimeandblankingtime.........316.15Integratedanalog-to-digitalconverter............................316.16Internalvoltageregulator.....................................316.17BUSY\SYNCpin............................................326.17.1BUSYoperationmode......................................326.17.2SYNCoperationmode......................................326.18FLAGpin.................................................337Phasecurrentcontrol.......................................347.1PWMsinewavegenerators....................................347.2Sensorlessstalldetection....................................357.3Lowspeedoptimization......................................357.4BEMFcompensation........................................367.5Motorsupplyvoltagecompensation.............................367.6Windingresistancethermaldriftcompensation....................378Serialinterface.............................................389Programmingmanual.......................................409.1Registersandflagsdescription................................409.1.1ABS_POS...............................................419.1.2EL_POS.................................................419.1.3M