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1、TlDRV8312和StellarisMCU三相BLDC马达驱动方案关键字：工业控制，马达驱动，StellarisMCUTI公司的三相BLDC马达驱动套件DK-LM3S-DRV8312采用DRV8312三相马达驱动器和StellarisMCU,是屮电压数字马达控制(DMC)套件，能驱动三相BLDC和永磁同步马达,输入电压最大52.5V,每相连续输出电流最大3.5A,峰值电流6.5A,驱动器开关频率高达500kHz.木文介绍了DRV8312/32主要特性，系统框图,三相应用框图和DRV8312应用案例电路图，以及DK-LM3S-DRV8312主要特
2、性,马达驱动系统框图，DRV8312评估板电路图和PCB布局图.TheDRV8312/32arehighperformance,integratedthreephasemotordriverswithanadvaneedprotectionsystem.BecauseofthelowRDs(on)ofthepowerMOSFETsandintelligentgatedrivedesign,theefficiencyofthesemotordriverscanbeupto97%,whichenablestheuseofsmallerpowersup
3、pliesandheatsinks,andaregoodcandidatesforenergyefficientapplications.TheDRV8312/32requiretwopowersupplies,oneat12VforGVDDandVDD,andanotherupto50VforPVDD.TheDRV8312/32canoperateatupto500-kHzswitchingfrequencywhilestillmaintainprecisecontrolandhighefficiency.Theyalsohaveaninnov
4、ativeprotectionsystemsafeguardingthedeviceagainstawiderangeoffaultconditionsthatcoulddamagethesystem.DRV8312/32主要特性：High-EfficiencyPowerStage(upto97%)withLowRDs(on)MOSFETs(80maatTj=25°C)OperatingSupplyVoltageupto50V(70VAbsoluteMaximum)DRV8312(powerpaddown):upto3.5AContinuousP
5、haseCurrent(6.5APeak)DRV8332(powerpadup):upto8AContinuousPhaseCurrent(13APeak)IndependentControlofThreePhasesPWMOperatingFrequencyupto500kHzIntegratedSelf-ProtectionCircuitsIneludingUndervoltage,Overtemperature,Overload,andShortCircuitProgrammableCycle-by-CycleCurrentLimitPro
6、tectionIndependentSupplyandGroundPinsforEachHalfBridgeIntelligentGateDriveandCrossConductionPreventionNoExternalSnubberorSchottkyDiodeisRequiredDRV8312/32应用：BLDCMotorsThreePhasePermanentMagnetSynchronousMotorsInvertersHalfBridgeDriversPoworChFtosot因ovooc冈83TT.C□^u».c区OH.C(3OC
7、JWXJ因GNDJB因GVOO^A因BST_A因8LA冈QND.ARoboticControlSystems图1.DRV8312/32Io”.ana•ObOflfCGxoOfMOG^ODrXroX益因図冈HCMAGX63'・・IIfPWV4Adv..-ir図VDO因VREG系统框图图2.DRV8332三相应用框图图3.DRV8312三相应用框图图4.DRV8312应用案例电路图采用DRV8312和StellarisMCU的三相BLDC马达驱动套件DK-LM3S-DRV8312TheMediumVoltageDigitalMotorControl(
8、DMC)kit(DK-LM3S-DRV8312),showninFigure5,providesagreatwaytolearnande
