TIDRV8818步进马达驱动解决方案

TIDRV8818步进马达驱动解决方案关键字：工业控制,马达驱动TI公司的DRV8818是用于打印机,扫描仪和其它自动化设备的步进马达驱动器,集成了两个H桥驱动器和用来控制步进马达的微步距分度器逻辑.微步距马达驱动器采用PWM,可提供1/8步操作,每个绕组的电流高达2.5A,主要用在打印机,纺织机械,定位/跟踪,工厂自动化和机器人.本文介绍了DRV8818主要特性,方框图和马达驱动电路以及评估模块DRV8818EVM方框图,电路图和材料清单.TheDRV8818providesanintegratedsteppermotordriversolutionforprinters,scanners,andotherautomatedequipmentapplications.ThedevicehastwoH-bridgedrivers,aswellasmicrosteppingindexerlogictocontrolasteppermotor.TheoutputdriverblockforeachconsistsofN-channelpowerMOSFETsconfiguredasfullH-bridgestodrivethemotorwindings.Asimplestep/directioninterfaceallowseasyinterfacingtocontrollercircuits.Pinsallowconfigurationofthemotorinfull-step,half-step,quarter-step,oreighth-stepmodes.DecaymodeandPWMofftimeareprogrammable.Internalshutdownfunctionsareprovidedforovercurrentprotection,shortcircuitprotection,under-voltagelockoutandovertemperature.DRV8818主要特性:PulseWidthModulation(PWM)MicrosteppingMotorDriverBuilt-InMicrosteppingIndexerUpto2.5-ACurrentPerWindingMicrosteppingIndexerProvidesupto1/8-StepOperationLow0.37-Ω(HS+LS)MOSFETOn-Resistance(at25°)ProgrammableMixedDecay,Blanking,andOffTimePin-CompatibleUpgradetoDRV8811WithLowerRds(on)ThermallyEnhancedSurfaceMountPackageDRV8818应用:•Printers•TextileMachinery•Positioning/Tracking•FactoryAutomation•Robotics图1.DRV8818方框图图2.DRV8818马达驱动电路评估模块DRV8818EVMTheDRV8818EVMisacompletesolutionforevaluatingtheDRV8818micro-stepping,bipolarstepperdriver.ItincludesaUSBlinktoprovideeasycontrolfromapersonalcomputer(PC),aMSP430microcontrollerthatinterpretsserialcommandsfromthePCandgeneratescontrolsignalstothedriverdevice,andtheDRV8818devicewithaccesstoallsignalsforacompleteevaluation.图3.评估模块DRV8818EVM外形图图4.评估模块DRV8818EVM方框图图5.评估模块DRV8818EVM电路图(1)AO-Electronics傲壹电子官网：中文网：电路图(2)评估模块DRV8818EVM材料清单: