DRV8825 Stepper Motor Controller IC datasheet (Rev. F)

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

10 Driver BMotor Driver 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.