直流无刷电机驱动芯片

TA8490F2001-06-131TOSHIBABIPOLARLINEARINTEGRATEDCIRCUITMULTI−CHIPTA8490F3−PHASEFULLWAVEBRUSHLESSDCMOTORDRIVERICFORCD−ROMDRIVESThis3−phase,full−wave,brushlessDCmotordriverIChasbeendevelopedforuseinCD−ROMdrivespindlemotors.TheTA8490Fcontainsinitsupperstageadiscretepowertransistorwhich,thankstoitslow−saturationcharacteristic,enablestheICtoprovidesuperiorthermalefficiency.Furthermore,themulti−chipstructureofthisdevicefacilitatesdispersionoftheheatgeneratedinsidethepackage,makingitpossibletosuppressheatconcentration.FEATURES
Multi−chipstructure(3RN6006chipsbuilt−in)
3−phase,full−wave,semi−lineardrive
Currentdrive/currentcontrol
Built−incurrentlimiter:ILIM=0.6A(typ.)(atRF=0.3Ω)
Built−inreversingbrake/shortbrakefunctions
FGsignaloutput(usinghallelementoutputsignal)
Built−inswitchingregulatorcontroller
Built−inhallbias
Built−inthermalshutdowncircuit
Package:MFP−30Weight:0.63g(typ.)TA8490F2001-06-132BLOCKDIAGRAMTA8490F2001-06-133PINASSIGNMENTTERMINALNo.TERMINALSYMBOLFUNCTIONREMARKS1Lb(B)b−phaseuppersidepowertransistor(base)outputterminalKeepopen.2La(B)a−phaseuppersidepowertransistor(base)outputterminalKeepopen.3Laa−phaseoutputterminalConnecttothecoil.4VM2SupplyvoltageterminalformotordriveConnecttoVM1externally.5CPSwitchingpowersourcesystemphasecompensatorterminalConnectacapacitorbetweenthisterminalandGND.6GND2GND―7OSCTriangularwaveoscillationterminalConnectacapacitorbetweenthisterminalandGND.8SWCSwitchingregulatorcontrolsignaloutputterminalConnecttothebaseoftheswitchingexternaltransistor.9SBRUN/STOPcontrolterminalH:RUN,L:STOP10FGOFGamplifieroutputterminalOutputsasignalwhosefrequencyisdeterminedbytheCDrotationfrequency.11BRKBrakemodeselectterminalOutputmodewhenVCVref12Hb−b−phasenegativehallsignalinputterminalConnecttohallelementoutputterminal.13Hb+b−phasepositivehallsignalinputterminalConnecttohallelementoutputterminal.14Ha−a−phasenegativehallsignalinputterminalConnecttohallelementoutputterminal.15Ha+a−phasepositivehallsignalinputterminalConnecttohallelementoutputterminal.16Hc+c−phasepositivehallsignalinputterminalConnecttohallelementoutputterminal.17Hc−a−phasenegativehallsignalinputterminalConnecttohallelementoutputterminal.18HBHallelementbiasterminalOpencollectoroutput.Connecttothenegativesideofhallelementbiasline.19CTControlsystemphasecompensatorterminalConnectacapacitorbetweenthisterminalandGND.20VCCSupplyvoltageterminalforcontrolcircuitsVCC(opr)=4.5~5.5VTA8490F2001-06-134TERMINALNo.TERMINALSYMBOLFUNCTIONREMARKS21VCControlamplifierinputterminalUsethecontrolsignalasinput.22VrefControlamplifierreferencevoltageinputterminalUsethereferencevoltageforthecontrolamplifierasinput.23MSModeselectterminalDeterminesoutputmode.24CdForward/reversechangeovergainadjustmentterminalAdjustarotationdirectionchangeovergain25GND1GND―26RFOutputcurrentdetectionterminalSetslimitercurrentvalueandcurrentgain.27Lc(B)c−phaseuppersidepowertransistor(base)outputterminalKeepopen.28Lcc−phaseoutputterminalConnecttothecoil.29VM1SupplyvoltageterminalformotordriveConnecttoVM2externally.30Lbb−phaseoutputterminalConnecttothecoil.ABSOLUTEMAXIMUMRATINGS(Ta=25°C)CHARACTERISTICSYMBOLRATINGUNITVCC7PowerSupplyVoltageVM16VOutputCurrentIO1.2APowerDissipationPD(Note1)1.0WJunctionTemperatureTj150°COperatingTemperatureTopr−20~75°CStorageTemperatureTstg−55~150°CNote1:unmountedOPERATINGVOLTAGERANGECHARACTERISTICSYMBOLOPERATINGRATINGUNITVCC4.5~5.5PowerSupplyVoltageVM3~14VTA8490F2001-06-135ELECTRICALCHARACTERISTICS(VCC=5V,VM=12V,Ta=25



C,)CHARACTERISTICSSYMBOLTESTCIRCUITTESTCONDITIONMINTYP.MAXUNITICC1Stopmode―24.5SupplyVoltageICC21Runmode,outputopen―715mAInputCurrentIINH2VCMRH=2.5V――2µACommonModeInputVoltageRangeVCMRH――1.5―4.0VHallAmp.InputAmplitudeVH―60――mVP-PHallElementBiasSaturationVoltageVHB2IHB=10mA―1.32.0VCommonModeInputVoltageRangeVCMRC2―1.0―4.0VInputCurrentIINC2VC=Vref=2.5V――5.0µADeadZoneVoltageWidthVDZ―VREF=2.5V,RF=0.3Ω―100―mV∆VOFF(F)CWmode,Vref=2.5V,RF=0.3
2050150ControlAmp.InputOffsetVoltage∆VOFF(R)3CCWmode,Vref=2.5V,RF=0.3Ω2050150mVCurrentLimitAmp.LimitCurrentILIM3RF=0.3Ω480600720mAInputVoltage(H)VINS(H)(RUN)3.0―VCCInputVoltage(L)VINS(L)(STOP)GND―1.0VRUN/STOPControlCircuitInputCurrentIINS(L)1VINS=GND――1µASaturationVoltage(UpperSide)Vsat(U)4Io=0.6A―0.11.3SaturationVoltage(LowerSide)Vsat(L)4Io=0.6A―0.61.0VCut−offCurrent(UpperSide)IL(U)5VL=16V――10OutputCircuitCut−offCurrent(LowerSide)IL(L)5VL=16V――10µAInputVoltage(H)VMS(H)6CCWmodeVCVref,BRK:L3.0―VCCInputVoltage(L)VMS(L)6ReversingbrakemodeVCVref,BRK:L――0.5VModeSelectCircuitInputCurrentIINMS6VMS=GND――1µATA8490F2001-06-136CHARACTERISTICSSYMBOLTESTCIRCUITTESTCONDITIONMINTYP.MAXUNITHysteresisVoltageVHYS6―52045mVp−pOutputVoltage(H)VOFG(H)7Sourcecurrent:10AVCC−0.5――FGAmp.OutputVoltage(L)VOFG(L)7Sinkcurrent:10A――0.5VInputVoltage(H)VBRK(H)6―3.0―VCCInputVoltage(L)VBRK(L)6―――0.5VShortBrakeCircuitInputCurrentIINBRK6VBRK=GND――1AOscillationFrequencyfOSC―C=250Pf(Note)―100―kHzChargeCurrentIOSC+7VOSC=1.8V50100200µATriangularOscillationCircuitDischargeCurrentIOSC−7VOSC=3.2V−200−100−50µASW−REGControlCircuitS