TL1451双脉冲宽度调制控制电路.pdf

TL1451双脉冲宽度调制控制电路.pdf

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UNISONICTECHNOLOGIESCO.,LTDTL1451LINEARINTEGRATEDCIRCUIT.tw1of14Copyright2005UnisonicTechnologiesCo.,LTDQW-R103-011,CDUALPULSE-WIDTH-MODULATIONCONTROLCIRCUITS?

DESCRIPTIONTheUTCTL1451incorporatesonasinglemonolithicchipallthefunctionsrequiredintheconstructionoftwopulse-width-modulation（PWM）controlcircuits.Designedprimarilyforpowersupplycontrol,theUTCTL1451containsanon-chip2.5Vregulator,twoerroramplifiers,anadjustableoscillator,twodead-timecomparators,undervoltagelockoutcircuitry,anddualcommonemitteroutputtransistorcircuits.?

FEATURES*CompletePWMpowercontrolcircuitry*Completelysynchronizedoperation*Internalundervoltagelockoutprotection*Widesupplyvoltagerange*InternalShort-Circuitprotection*Oscillatorfrequency500kHzmax*Variabledeadtimeprovidescontrolovertotalrange*Internalregulatorprovidesastable2.5VreferencesupplyDIP-16SOP-16TSSOP-16*Pb-freeplatingproductnumber:

TL1451L?

ORDERINGINFORMATIONOrderNumberNormalLeadfreeplatingPackagePackingTL1451-S16-RTL1451L-S16-RSOP-16TapeReelTL1451-S16-TTL1451L-S16-TSOP-16TubeTL1451-P16-RTL1451L-P16-RTSSOP-16TapeReelTL1451-P16-TTL1451L-P16-TTSSOP-16TubeTL1451-D16-TTL1451L-D16-TDIP-16TubeTL1451LINEARINTEGRATEDCIRCUITUNISONICTECHNOLOGIESCO.,LTD2of14.twQW-R103-011,C?

PINCONFIGURATIONCTRT1IN+1IN-1FEEDBACK1DTC1OUTGNDVcc2OUT2DTC2IN-SCPREF2IN+2FEEDBACKERRORAMPLIFIER1ERRORAMPLIFIER212345678910111213141516?

BLOCKDIAGRAM170k+-+-12k1/2VrefOscillatorRegerenceVoltageRSRUVLO1OUTPUT781610PWMCOMP2OUTPUTREFPWMCOMPGND129VCCRTCT111413125153461DTCIN-IN+ERROPAMPLIFIER1SCP1FEEDBACK2FEEDBACKIN-IN+ERROPAMPLIFIER22DTCTL1451LINEARINTEGRATEDCIRCUITUNISONICTECHNOLOGIESCO.,LTD3of14.twQW-R103-011,C?

ABSOLUTEMAXIMUMRATINGS（Ta=25C,unlessotherwisespecified）PARAMETERSYMBOLVALUEUNITSupplyVoltageVCC51VAmplifierInputVoltageVIN20VCollectorOutputVoltageVOUT51VCollectorOutputCurrentIOUT21mADIP-161000SOP-16500PowerDissipationTSSOP-16PD700mWJunctionTemperatureTJ+125COperatingTemperatureTOPR-20+85CStorageTemperatureTSTG-40+150CNote1.Absolutemaximumratingsarethosevaluesbeyondwhichthedevicecouldbepermanentlydamaged.Absolutemaximumratingsarestressratingsonlyandfunctionaldeviceoperationisnotimplied.2.Thedeviceisguaranteedtomeetperformancespecificationwithin0+70operatingtemperaturerangeandassuredbydesignfrom20+85.?

RECOMMENDEDOPERATINGCONDITIONSPARAMETERSYMBOLMINTYPMAXUNITSupplyVoltageVCC3.650VAmplifierInputVoltageVIN1.051.45VCollectorOutputVoltageVOUT50VCollectorOutputCurrent（eachTransistor）IOUT20mACurrentintoFeedbackTerminalIFB45AFeedbackResistorRF100kTimingCapacitorCT15015000pFTimingResistorRT5.1100kOscillatorfrequencyFOSC1500kHzOperatingTemperatureTOPR-2085C?

ELECTRICALCHARACTERISTICS（VCC=6V,f=200kHz,Ta=25C,unlessotherwisespecified.）PARAMETERSYMBOLTESTCONDITIONSMINTYPMAXUNITReferenceSectionOutputVoltageVOUTIOUT=1mA2.42.52.6VTa=-20C25C-0.11OutputVoltageChangewithTemperatureTa=25C85C-0.21%InputVoltageRegulationVINVcc=3.6V40V212.5mVOutputVoltageRegulationVOUTIOUT=0.1mA1mA17.5mVShort-CircuitOutputCurrentIOUTVOUT=031030mAUndervoltageLockoutSectionUpper2.72VThresholdVoltage（Vcc）LowerVTHR2.6VHysteresis（Vcc）VHYS80120mVResetThresholdvoltage（Vcc）IOUT（REF）=0.1mA1.51.9VShort-CircuitProtectionControlSectionInputThresholdVoltage（SCP）VIN（THR）0.650.70.75VStandbyVoltage（SCP）VSTN-BYNopullup140185230mVLatchedInputVoltage（SCP）VIN（LAT）Nopullup60120mVInput（source）CurrentIIN（source）VIN=0.7V-10-15-20AComparatorThresholdVoltage（FEEDBACK）VTHR1.18VTL1451LINEARINTEGRATEDCIRCUITUNISONICTECHNOLOGIESCO.,LTD4of14.twQW-R103-011,C?

ELECTRICALCHARACTERISTICS（Cont.）PARAMETERSYMBOLTESTCONDITIONSMINTYPMAXUNITOscillatorSectionFrequencyFCT=330pF,RT=10k200kHzStandarddeviationoffrequencyCT=330pF,RT=10k10%FrequencyChangewithVoltageVcc=3.6V40V1%TA=-20C25C-0.42FrequencyChangewithTemperatureTA=25C85C-0.22%Dead-TimeControlSectionInputbiasCurrent（DTC）IIN（BIAS）1ALatchmode（source）Current（DTC）-80-145ALatchedInputVoltage（DTC）VINIOUT=40A2.3VZerodutycycle2.052.25InputthresholdVoltageatf=10kHz（DTC）VIN（THR）Maximumdutycycle1.21.45VError-AmplifierSectionInputOffsetVoltageVIN（OFF）VOUT（FEEDBACK）=1.25V6mVInputOffsetCurrentIIN（OFF）VOUT（FEEDBACK）=1.25V100nAInputBiascurrentIIN（BIAS）VOUT（FEEDBACK）=1.25V160500nACommon-ModeInputVoltageRangeVIN（CM）Vcc=3.6V40V1.051.45VOpen-loopVoltageAmplificationRF=200k7080dBUnity-gainBandwidthBG1.5MHzCommon-modeRejectionRatioRR6080dBPositiveOutputVoltageSwingVOUTVref-0.1VNegativeOutputVoltageSwingVOUT1VOutput（sink）Current（FEEDBACK）IOUT（SIN）VID=-0.1V,VOUT=1.25V0.51.6mAOutput（source）Curren