DRV8825 Stepper Motor Controller IC ... - Texas Instruments

1 STEPStep SizeDecay to 45 VControllerM+ -+ -DRV88251/32 stepStepper Motor ADIRnFAULTP roductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityDRV8825 SLVSA73F APRIL2010 REVISEDJULY2014 DRV8825 StepperMotorControllerIC1 Features3 DescriptionTheDRV8825providesan integratedmotordriver1 PWMM icrosteppingStepperMotorDriversolutionfo r printers,scanners,and otherautomated devicehas two H-bridge Up to 1/32 Microsteppingdriversand a microsteppingindexer,and is intendedto drivea MultipleDecayModesblockconsistsof N-channelpowerMOSFET s MixedDecayconfiguredas full H-bridgesto drivethe Motor DRV8825is capableof drivingup A of currentfromeachoutput(withproperheat FastDecaysinking,at 24 V and 25 C). 45-VOperatingSupplyVoltageRangeA simpleSTEP/DIRinterfaceallowseasyinterfa cing 24 V andto allowfor configurationTA= 25 Cof the motorin full-stepup to 1 SimpleSTEP/DIRI nterfacemodeis configurableso that slowdecay,fast decay, Low CurrentSleepModeor mixeddecaycanbe low-powersleepmodeis providedwhichshutsdowninternalcircuitry achieveverylow SmallPackageand Footprintsleepmodecan be set usinga dedicatednSLEEP ProtectionFeaturespin.

2 OvercurrentProtection(OCP)Internalshutdo wnfunctionsareprovidedfor ThermalShutdown(TSD)overcurrent,shortcir cuit, indicatedvia VM UndervoltageLockout(UVLO)the nFAULTpin. FaultConditionIndicationPin (nFAULT)DeviceInformation(1)2 ApplicationsPARTNUMBERPACKAGEBODYSIZE(NO M) AutomaticTellerMachinesDRV8825 HTSSOP(28) MoneyHandlingMachines(1) For all availablepackages,see the orderableaddendumat VideoSecurityCamerasthe end of the datasheet. Printers Scanners OfficeAutomationMachines GamingMachines FactoryAutomation Robotics4 SimplifiedSchematicMicrosteppingCurrentW aveform1An IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand APRIL2010 Applicationand Pin Configurationand Deviceand Mechanical,Packaging,and RevisionHistoryChangesfromRevisionE (August2013)to RevisionFPage Addednew sectionsand reordereddatasheetto fit new TI flow.

3 1 Updatedpin Addedpowersupplyramprate and updatedISENSE xpin UpdatedVILvoltageminimumand UpdatedIINand 2010 2014, APRIL2010 REVISEDJULY20146 Pin Configurationand FunctionsPin FunctionsPINEXTERNALCOMPONENTSI/O(1)DESC RIPTIONOR F 50-VcapacitorbetweenCP1and , 28 DevicegroundConnecta F 16-Vceramiccapacitorand a 1-M resistortoVCP3 BridgeA powersupplyConnectto motorsupply( to 45 V). Bothpins mustbeconnectedto the samesupply,bypassedwith a F capacitorVMB11 BridgeB powersupplyto GND,and connectedto appropriatebulk GNDwith a F currentset referenceinputReferencevoltagefor windingcurrentset. NormallyAVREFandBVREFare connectedto the be connectedtoBVREF13 IBridgeB currentset = slowdecay,open= mixeddecay,DECAY19 IDecaymodehigh = fast the directionof the step mode- full, 1/2, 1/4, 1/8/MODE125 IMicrostepmode11/16,or 1 No connectLeavethis pin to disabledeviceoutputsand indexeroperation,logicnENBL21 IEnableinputlow to indexerlogicand to enabledevice,logiclow to indexerto moveone whenin fault condition(overtemp,overcurrent)(1)Direct ions:I = input,O = output,OD = open-drainoutput,IO = input/outputCopyright 2010 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLinks.

4 DRV8825 DRV8825 SLVSA73F APRIL2010 Functions(continued)PINEXTERNALCOMPONENT SI/O(1)DESCRIPTIONOR whenat homestateof step tableOUTPUTAOUT15 OBridgeA output1 Connectto AOUT1 AOUT2 AOUT27 OBridgeA output2 BOUT110 OBridgeB output1 Connectto BOUT1 BOUT2 BOUT28 OBridgeB output2 ISENA6I/OBridgeA ground/ IsenseConnectto currentsenseresistorfor ground/ IsenseConnectto currentsenseresistorfor (1)(2)MINMAXUNITP owersupplyvoltage (VMx)Powersupplyramprate1V/ sDigitalpin voltage (xVREF)Inputvoltage voltage(3) ,t < 1 sInternallylimitedAContinuousmotordriveo utputcurrent(4) powerdissipationSeeThermalInformationTJO peratingjunctiontemperaturerange 40150 C(1)StressesbeyondthoselistedunderAbsolu teMaximumRatingsmay causepermanentdamageto the stressratingsonly,and functionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditionsis not absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.

5 (2)All voltagevaluesare with respectto networkgroundterminal.(3)Transientsof 1 V for less than25 ns are acceptable(4)Powerdissipationand thermallimitsmustbe 60150 CHumanbodymodel(HBM),per ANSI/ESDA/JEDECJS-001,all pins(1) 20002000 ElectrostaticV(ESD)VdischargeChargeddevi cemodel(CDM),per JEDEC specificationJESD22-C101,all pins(2) 500500(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a (VMx)Motorpowersupplyvoltagerange(1) (VREF)VREF inputvoltage(2) current01mA(1)All VMpins mustbe connectedto the samesupplyvoltage.(2)Operationalat VREF between0 to 1 V, but accuracyis 2010 2014, APRIL2010 (1)PWPUNIT28 PINSR JAJunction-to-ambientthermalresistance(2 ) JC(top)Junction-to-case(top)thermalresis tance(3) JBJunction-to-boardthermalresistance(4) C/W JTJunction-to-topcharacterizationparamet er(5) JBJunction-to-boardcharacterizationparam eter(6) JC(bot)Junction-to-case(bottom)thermalre sistance(7) (1)For moreinformationabouttraditionaland new thermalmetrics,see theICPackageThermalMetricsapplicationrep ort,SPRA953.

6 (2)The junction-to-ambientthermalresistanceunde rnaturalconvectionis obtainedin a simulationon a JEDEC-standard,high-Kboard,asspecifiedin JESD51-7,in an environmentdescribedin JESD51-2a.(3)The junction-to-case(top)thermalresistanceis obtainedby simulatinga cold platetest on the packagetop. No specificJEDEC-standardtest exists,but a closedescriptioncan be foundin the ANSISEMI standardG30-88.(4)The junction-to-boardthermalresistanceis obtainedby simulatingin an environmentwith a ring cold platefixtureto controlthe PCBtemperature,as describedin JESD51-8.(5)The junction-to-topcharacterizationparameter , JT, estimatesthe junctiontemperatureof a devicein a real systemand is extractedfromthe simulationdatafor obtaining JA, usinga proceduredescribedin JESD51-2a(sections6 and 7).(6)The junction-to-boardcharacterizationparamet er, JB, estimatesthe junctiontemperatureof a devicein a real systemand is extractedfromthe simulationdatafor obtaining JA, usinga proceduredescribedin JESD51-2a(sections6 and 7).

7 (7)The junction-to-case(bottom)thermalresistanc eis obtainedby simulatinga cold platetest on the exposed(power) specificJEDEC standardtest exists,but a closedescriptioncan be foundin the 2010 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLinks: DRV8825 DRV8825 SLVSA73F APRIL2010 40 C to 85 C (unlessotherwisenoted)PARAMETERTESTCONDI TIONSMINTYPMAXUNITPOWERSUPPLIESIVMVM operatingsupplycurrentV(VMx)= 24 V58mAIVMQVM sleepmodesupplycurrentV(VMx)= 24 V1020 AV3P3 OUTREGULATORV3P3V3P3 OUTvoltageIOUT= 0 to 1 currentVIN = 0 2020 AIIHI nputhigh currentVIN = V100 ARPDI nternalpulldownresistance100k nHOME,nFAULTOUTPUTS(OPEN-DRAINOUTPUTS)VO LO utputlow voltageIO= 5 leakagecurrentVO= V1 ADECAYINPUTVILI nputlow thresholdvoltageFor thresholdvoltageFor fast decaymode2 VIINI nputcurrent 4040 AInternalpullupresistanceRPU130k (to V)RPDI nternalpulldownresistance80k H-BRIDGEFETSV(VMx)= 24 V, IO= 1 A, TJ= 25 FET on resistanceV(VMx)= 24 V, IO= 1 A, TJ= 85 (ON) V(VMx)= 24 V, IO= 1 A, TJ= 25 FET on resistanceV(VMx)

8 = 24 V, IO= 1 A, TJ= 85 2020 AMOTORDRIVERI nternalcurrentcontrolPWM PWM30kHzfrequencytBLANKC urrentsenseblankingtime4 stRRisetime30200nstFFall time30200nsPROTECTIONCIRCUITSVUVLOVM undervoltagelockoutvoltageV(VMx) level3 AtDEGO vercurrentdeglitchtime3 stTSDT hermalshutdowntemperatureDie temperature150160180 CCURRENTCONTROLIREFxVREF inputcurrentV(xVREF)= V 33 AVTRIPxISENSE trip voltageV(xVREF)= V, 100%currentsetting635660685mVV(xVREF)= V, 5% currentsetting 25%25%V(xVREF)= V, 10%to 34%currentsetting 15%15%Currenttrip accuracy ITRIP(relativeto programmedvalue)V(xVREF)= V, 38%to 67%currentsetting 10%10%V(xVREF)= V, 71%to 100%currentsetting 5%5%AISENSEC urrentsenseamplifiergainReferenceonly5V/ V6 SubmitDocumentationFeedbackCopyright 2010 2014, APRIL2010 STEPS tepfrequency250kHz2tWH(STEP)Pulseduratio n, s3tWL(STEP)Pulseduration, s4tSU(STEP)Setuptime,commandbeforeSTEP rising650ns5tH(STEP)Holdtime,commandafte rSTEP rising650ns6tENBLE nabletime,nENBL activeto STEP650ns7tWAKEW akeuptime,nSLEEP inactivehigh to TimingDiagramCopyright 2010 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback7 ProductFolderLinks:DRV8825V(VMx) (V)RDS(ON) HS + LS (m:)813182328333843400450500550600650700 750D003-40GC25GC85GC125 GCTA (GC)RDS(ON) HS + LS (m:)-50-25025507510012540045050055060065 0700750D0048 V24 V45 VV(VMx) (V)IVM (mA) (VMx) (V)IVMQ (2A)101520253035404568101214D002-40GC25G C85GC125 GCDRV8825 SLVSA73F APRIL2010 IVMxvs V(VMx)Figure3.

9 IVMxQvs V(VMx)Figure4. RDS(ON)vs V(VMx)Figure5. RDS(ON)vs Temperature8 SubmitDocumentationFeedbackCopyright 2010 2014, APRIL2010 REVISEDJULY20148 DRV8825is an integratedmotordriversolutionfor deviceintegratestwo NMOSH-bridges,currentsense,regulationcir cuitry,and a DRV8825can be poweredwith and 45 V and is capableof providingan outputcurrentup to A simpleSTEP/DIRinterfaceallowsfor easyinterfacingto the internalindexeris abletoexecutehigh-accuracymicrosteppingw ithoutrequiringthe processorto controlthe currentregulationis highlyconfigurable,with threedecaymodesof the applicationrequirements,the usercan selectfast, slow,and low-powersleepmodeis includedwhichallowsthe systemto savepowerwhennot drivingthe 2010 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback9 ProductFolderLinks: DRV8825 GNDGNDPPADnFAULTnHOME nSLEEPnRESETMODE2 MODE1 MODE0 DIRSTEP nENBLC ontrol Logic/IndexerDECAYI nternal VCCLow Side Gate DriveV3P3 OUT V VV3P3 OUTT hermal Shut DownMotor Driver BMotor Driver

10 ACharge PumpISENBBOUT2 BOUT1 VMBISENAAOUT2 AOUT1 VMAVCPCP2CP1 VMVMVMHS Gate DriveLS Gate DriveVMVM++ Stepper Motor + DRV8825 SLVSA73F APRIL2010 2010 2014, APRIL2010 DRV8825containstwo H-bridgemotordriverswith showsa blockdiagramof the MotorControlCircuitryNotethat thereare multipleVM VM pins mustbe connectedtogetherto the 2010 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback11 ProductFolderLinks: DRV8825 (xREF)CHOPISEN SEVI5 R KDRV8825 SLVSA73F APRIL2010 (continued) currentthroughthe motorwindingsis regulatedby a fixed-frequencyPWMcurrentregulation,or H-bridgeis enabled,currentrisesthroughthe windingat a rate dependenton the DC voltageand inductanceof the currenthits the currentchoppingthreshold,the bridgedisablesthecurrentuntil the beginningof the next steppingmotors,currentregulationis usedto vary the currentin the two windingsin a semi-sinusoidalfashionto PWMchoppingcurrentis set by a comparatorwhichcomparesthe voltageacrossa currentsenseresistorconnectedto the xISEN pins,multipliedby a factorof 5, with a referencevoltageis inputfromthe full-scale(100%)choppingcurrentis calculatedin Equation1.