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OnSemiAMIS-30532-D微步进马达控制方案OnSemi公司的AMIS-30532-D是微步进的步马达驱动器,它通过I/O引脚与SPI接口和外接MCU连接,可用于双极步进马达控制.AMIS-30532-D包括有电压稳压器,重置输出和看门狗重置.可编程峰值电流高达1.6A,和5V与3.3VMCU兼容.本文介绍AMIS-30532-D主要特性,方框图,典型应用电路和所用元器件.TheAMIS-30532isamicro-steppingsteppermotordriverforbipolarsteppermotors.ThechipisconnectedthroughI/OpinsandanSPIinterfacewithanexternalmicrocontroller.Ithasanon-chipvoltageregulator,reset-outputandwatchdogreset,abletosupplyperipheraldevices.TheAMIS-30532containsacurrent-translationtableandtakesthenextmicro-stepdependingontheclocksignalontheNXTinputpinandthestatusoftheDIR(=direction)registerorinputpin.Thechipprovidesaso-calledspeedandloadangleoutput.Thisallowsthecreationofstalldetectionalgorithmsandcontrolloopsbasedonload-angletoadjusttorqueandspeed.ItisusingaproprietaryPWMalgorithmforreliablecurrentcontrol.TheAMIS-30532isimplementedinI2T100technology,enablingbothhigh-voltageanalogcircuitryanddigitalfunctionalityonthesamechip.Thechipisfullycompatiblewiththeautomotivevoltagerequirements.TheAMIS-30532isideallysuitedforgeneral-purposesteppermotorapplicationsintheautomotive,industrial,medical,andmarineenvironment.Withtheon-chipvoltageregulatoritfurtherreducestheBOMformechatronicstepperapplications.AMIS-30532-D主要特性:DualH-Bridgefor2-PhaseStepperMotorsProgrammablePeak-Currentupto1.6AContinuous(3.0AShortTime)usinga5-bitCurrentDACOn-ChipCurrentTranslatorSPIInterfaceSpeedandLoadAngleOutputSevenStepModesfromFull-StepUpto32Micro-StepsFullyIntegratedCurrent-SensePWMCurrentControlwithAutomaticSelectionofFastandSlowDecayLowEMCPWMwithSelectableVoltageSlopesActiveFly-BackDiodesFullOutputProtectionandDiagnosisThermalWarningandShutdownCompatiblewith5Vand3.3VMicrocontrollersIntegrated5VRegulatortoSupplyExternalMicrocontrollerIntegratedResetFunctiontoResetExternalMicrocontrollerIntegratedWatchdogFunction图1.AMIS-30532-D方框图图21.AMIS-30532典型应用电路图应用电路元件表:AO-Electronics傲壹电子官网：中文网：