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TIDRV8412高性能双路全桥马达驱动方案TI公司的DRV8412/22/32是集成了先进保护系统的高性能双路全桥马达驱动器,功率级的效率高达成协97%.DRV8412/22/32需要两个电源,12V用于GVDD和VDD,50V用于PVDD.DRV8412双路全桥模式2x3A或并联6A连续模式,DRV8422双路全桥模式2x5A或并联10A连续模式,DRV8432双路全桥模式2x7A或并联14A连续模式,PWM频率高达500kHz,主要用于无刷DC和步进马达,三相永磁同步马达,机器人和触感力控制系统,精密仪表和TEC驱动器.本文介绍DRV8412/22/32主要特性,系统方框图,简化应用电路图,全桥模式和并行全桥模式工作的应用框图,步进马达工作的应用框图,三相PMSMGND传感模式工作的应用框图以及TEC驱动器的应用框图.TheDRV8412/22/32arehighperformance,integrateddualfullbridgemotordriverswithanadvancedprotectionsystem.BecauseofthelowRDS(on)oftheH-BridgeMOSFETsandintelligentgatedrivedesign,theefficiencyofthesemotordriverscanbeupto97%,whichenablestheuseofsmallerpowersuppliesandheatsinks,andaregoodcandidatesforenergyefficientapplications.TheDRV8412/22/32requiretwopowersupplies,oneat12VforGVDDandVDD,andanotherupto50VforPVDD.TheDRV8412/22/32canoperateatupto500-kHzswitchingfrequencywhilestillmaintainprecisecontrolandhighefficiency.Theyalsohaveaninnovativeprotectionsystemsafeguardingthedeviceagainstawiderangeoffaultconditionsthatcoulddamagethesystem.DRV8412/22/32主要特性:High-EfficiencyPowerStage(upto97%)withLowRDS(on)MOSFETs(80matTJ=25℃)OperatingSupplyVoltageupto50V(70VAbsoluteMaximum)DRV8412(powerpaddown):upto2x3AContinuousOutputCurrent(2x6APeak)inDualFullBridgeModeor6AContinuousCurrentinParallelMode(12APeak)DRV8422(powerpadup):upto2x5AContinuousOutputCurrent(2x9APeak)inDualFullBridgeModeor10AContinuousCurrentinParallelMode(18APeak)DRV8432(powerpadup):upto2x7AContinuousOutputCurrent(2x12APeak)inDualFullBridgeModeor14AContinuousCurrentinParallelMode(24APeak)PWMOperatingFrequencyupto500kHzIntegratedSelf-ProtectionCircuitsIncludingUndervoltage,Overtemperature,Overload,andShortCircuitProgrammableCycle-by-CycleCurrentLimitProtectionIndependentSupplyandGroundPinsforEachHalfBridgeIntelligentGateDriveandCrossConductionPreventionNoExternalSnubberorSchottkyDiodeisRequiredDRV8412/22/32应用:BrushedDCandStepperMotorsThreePhasePermanentMagnetSynchronousMotorsRoboticandHapticControlSystemActuatorsandPumpsPrecisionInstrumentsTECDrivers图1.DRV8412/22/32系统方框图图2.DRV8412/22/32简化应用电路图图3.DRV8412/22/32全桥模式工作的应用框图图4.DRV8412/22/32并行全桥模式工作的应用框图图5.DRV8412/22/32步进马达工作的应用框图图6.DRV8412/22/32三相PMSMPVDD传感模式工作的应用框图图7.DRV8412/22/32三相PMSMGND传感模式工作的应用框图图8.DRV8412/22/32TEC驱动器的应用框图AO-Electronics傲壹电子官网：中文网：图9.DRV8412应用电路案例