LM5032 High-Voltage Dual Interleaved Current Mode Controller

1 ERROR AMP& ISOLATIONERROR AMP& to 75 VInputGND1 GND2 VPWRP roductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityReferenceDesignLM5032 SNVS344B MARCH2005 REVISEDDECEMBER2014LM5032 High-VoltageDual InterleavedCurrentMode Controller1 Features3 DescriptionTheLM5032dualcurrentmodePWMco ntroller1 Two IndependentPWMC urrentModeControllerscontainsall the featuresneededto controleithertwo IntegratedHigh-VoltageStartupRegulatorin dependentforwarddc/dcconvertersor a singlehigh two two controllerchannelsoperate180 out SingleResistorOscillatorSettingto 2 MHzof SynchronizableOscillatorLM5032includesa startupregulatorthatoperates ProgrammableMaximumDutyCycleovera wideinputrangeup to 100 V and compound(bipolar+ CMOS)gatedriversthat providea robust MaximumDutyCycleFold-Backat the primaryside AdjustableTimerfor ,cycle-by- IntegratedSlopeCompensationcyclecurrentl imit,hiccupmodefaultoperationwithadjusta bleresponsetime,PWMslopecompensation, AdjustableLine UndervoltageLockoutsoft-start,anda 2-MHzcapableoscillatorwith IndependentlyAdjustableSoft-Start( ) DirectInterfacewith Opto-CouplerTransistorDeviceInformation( 1) ThermalShutdownPARTNUMBERPACKAGEBODYSIZE (NOM) TSSOP16-PinPackageLM5032 TSSOP(16) x (1) For all availablepackages,see the orderableaddendumat2 Applicationsthe end of the datasheet.

2 TelecommunicationPowerConverters IndustrialPowerConverters 42-VAutomotiveSystemsTypicalApplicationC ircuit1An IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand MARCH2005 Applicationand Pin Configurationand Deviceand Mechanical,Packaging,and RevisionHistoryNOTE:Pagenumbersfor previousrevisionsmay differfrompagenumbersin the (April2013)to RevisionBPage AddedPinConfigurationandFunctionssection ,HandlingRatingtable,FeatureDescriptions ection,DeviceFunctionalModes,Application andImplementationsection,PowerSupplyReco mmendationssection,Layoutsection,Devicea ndDocumentationSupportsection,andMechani cal,Packaging, (April2013)to RevisionAPage Changedlayoutof NationalDataSheetto TI 2005 2014,TexasInstrumentsIncorporatedProduct FolderLinks:LM503243215678 VINCOMP1CS1SS1 UVLOVCCOUT1 GND1 GND2 OUT2 RESSS2CS2 COMP2 MARCH2005 REVISEDDECEMBER20145 Pin Configurationand FunctionsPW Package16-PinTSSOPTop ViewPin the operatinginputrangeis 13 V to100 V with transientcapabilityto 105 ,Controller1 The COMP1inputprovidesvoltagefeedbackto the PWMcomparatorinvertinginputof Controller1 througha 3.

3 1 cycleincreasesas the pull-upresistorto currentto ,Controller1 Inputfor currentmodecontroland the currentlimit theCS1pin OUT1pulseis CS1will adjust(increase) pin'svoltagemustnot ,Controller1An internal50- A currentsourcechargesan externalcapacitortoset the currentlimit restartsequence,theinternalcurrentsource is reducedto 1 A to increasethe V shutsoff Under-VoltageLockoutAn externalresistordividersets the inputvoltagethresholdto enablethe UVLO comparatorreferencevoltageis Aswitched20- A UVLOpin voltagealso controlsthe maximumduty cycleasdescribedin the is aminimumof 19 ,Controller1 Gatedriveroutputto the primaryside switchfor Controller1. OUT1swingsbetweenVCCand GND1at a frequencyequalto half ,Controller1 Groundconnectionfor Controller1 includinggatedriver,PWMcontroller,soft-s tartand ,Controller2 Groundconnectionfor Controller2 includingthe gatedriver,PWMcontrollerand ,Controller2 Gatedriveroutputto the primaryside switchfor Controller2.

4 OUT2swingsbetweenVCCand GND2at a frequencyequalto half externalcapacitorsets the time delaybeforeforcedrestartduringa sustainedperiodof hiccupmodecomparatorthresholdis 2005 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLinks:LM5032LM5032 SNVS344B MARCH2005 Functions(continued) ,Controller2An internal50- A currentsourcechargesan externalcapacitortoset the currentlimit restartsequence,theinternalcurrentsource is reducedto 1 A to increasethe V shutsoff ,Controller2 Inputfor currentmodecontroland the currentlimit theCS2pin V the OUT2pulseis CS2will adjust(increase) pin'svoltagemustnot ,Controller2 The COMP2inputprovidesvoltagefeedbackto the PWMcomparatorinvertinginputof Controller2 througha 3:1 cycleincreasesas the pull-upresistorto V providesbias currentto externalresistorsets the maximumallowedduty cycleat OUT1and SynchronizingAn externalresistorsets the pin alsoinputacceptsac-coupledsynchronizatio npulsesfroman (1)(2)MINMAXUNITVIN to GND GND ,RESand DCLto GND Pinsto GND otherinputsto GND CLeadTemperature(Soldering4 sec),(3)260 CStoragetemperature,Tstg 55150 C(1)AbsoluteMaximumRatingsare limitsbeyondwhichdamageto the devicemay the deviceis intendedto be specificationsand test conditions,see theElectricalCharacteristics.

5 (2)If Military/Aerospacespecifieddevicesare required,pleasecontactthe TexasInstrumentsSalesOffice/Distributors for availabilityandspecifications.(3)For detailedinformationon solderingplasticTSSOP packages,referto the (ESD)ElectrostaticdischargeHuman-bodymod el(HBM),per ANSI/ESDA/JEDECJS-001(1) 2000V(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a (unlessotherwisenoted)MINMAXUNITVIN Voltage13100 VExternalVoltageAppliedto VCC815 VOperatingJunctionTemperature 40125 C4 SubmitDocumentationFeedbackCopyright 2005 2014, MARCH2005 (1)PWUNIT16 PINSR JC(top)Junction-to-case(top) C/W (1)For moreinformationabouttraditionaland new thermalmetrics,see theICPackageThermalMetricsapplicationrep ort, and MAXlimitsapply 40 C TJ 125 C. VIN = 48 V, VCC= 10 V externallyapplied,RT= RDCL= , UVLO= , TJ= 25 C, unlessotherwisestated,see(1)and see(2).SYMBOLPARAMETERTESTCONDITIONSMINT YPMAXUNITSTARTUPREGULATOR(VIN,VCCPins)VC CRegVCCvoltageExt.

6 (Lim)VCCcurrentlimitVCC= supplydisconnected,VIN = (VCCincreasing)300 mV100 = 90V,UVLO= 0V500600 AICCInSupplycurrentinto VCCfromOutputloads= open,VCC= ACURRENTSENSEINPUT(CS1,CS2 Pins) delayto outputCS1(CS2)takenfromzeroto (OUT2)to fall to 90%of = 0 at50nsCS1(CS2)CS1(CS2)sink impedanceInternalpull-downFET (clocked)RCSE quivalentinputresistanceat CSCS ,internalFET CURRENTLIMITRESTART(RESPin) ADischargesink ASOFT-START(SS1,SS2 Pins)ISSC urrentsource(normal355065 Aoperation)Currentsourceduringa Alimit restartVSSO pencircuitvoltage5 VOSCILLATOR(RT/SYNCPin)FS1 Frequency1 (at OUT1,OUT2)RT= 183200217kHzFS2 Frequency2 (at OUT1,OUT2)RT= 530600670kHz(1)All electricalcharacteristicshavingroomtempe raturelimitsare testedduringproductionwith TA= 25 C. All hot and cold limitsarespecifiedby correlatingthe electricalcharacteristicsto processand temperaturevariationsand applyingstatisticalprocesscontrol.

7 (2)Typicalspecificationsrepresentthe mostlikelyparametricnormat 25 C operationCopyright 2005 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLinks:LM5032LM5032 SNVS344B MARCH2005 (continued)MIN and MAXlimitsapply 40 C TJ 125 C. VIN = 48 V, VCC= 10 V externallyapplied,RT= RDCL= , UVLO= , TJ= 25 C, unlessotherwisestated,see(1)and see(2).SYMBOLPARAMETERTESTCONDITIONSMINT YPMAXUNITDC (COMP1,COMP2,DutyCycleLimitPins)Delayto outputCOMP1(COMP2)set to 2V. CS1(CS2)50nssteppedfrom0 to OUT1(OUT2)to fall to 90%of = (COMP2)opencircuit5 VvoltageICOMPCOMP1(COMP2)shortcircuitCOM P1(COMP2)= (COMP2)to (PWM2)gainMinimumduty cycleSS1 (SS2)= 0V0%Maximumduty cycle1 UVLOpin = ,RDCL= RT, COMP176%(COMP2)= openMaximumduty cycle2 UVLOpin = ,RDCL= RT, COMP120%(COMP2)= openMaximumduty cycle3 UVLOpin = ,RDCL= RT/4, COMP120%(COMP2)= openMaximumduty cycle4 UVLOpin = ,RDCL= RT, COMP150%(COMP2)= openMaximumduty cycle5 UVLOpin = ,RDCL= RT/2, COMP140%(COMP2)= openSlopecompensationDeltaincreaseat PWMcomparatorto CS190mV(CS2)ChannelmismatchCS1(CS2)= COMP offsetSS1 (SS2)= (OUT1,OUT2)Outputhigh voltageIOUT= 50mA(source) voltageIOUT= 100 mA (sink) 1 nF12nsFall timeCLOAD= 1 CHysteresis20 C6 SubmitDocumentationFeedbackCopyright 2005 2014, MARCH2005 REVISEDDECEMBER2014 Figure1.

8 StartupSequenceCopyright 2005 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback7 ProductFolderLinks:LM5032051015202501234 5678 VCC (V)ICC (mA)1101001000RT (k:) FREQUENCY (MHz)02468101214 VOLTAGE AT VIN (V)012345678 VCC (V)UVLO > Pin Unloaded891011121314 APPLIED VCC VOLTAGE (V)020406080100 ICC (mA)15 OUT1, 2 = OpenOUT1, 2 load = 2200 pF50 kHz500 kHz1 MHz200 kHzOutput Drivers @ 1 MHz0204060801000100200300400500600 INPUT Current IIN (2A)VOLTAGE AT VIN (V)UVLO = 0 VVCC Pin = OpenVCC Pin = 10V02040608010002468101214 INPUT Current IIN (mA)VOLTAGE AT VIN (V)VCC pin = open,OUT1 & OUT2 load = 2200 pFVCC pin = open, Driver Outputs OpenUVLO > frequency = 200 kHzVCC pin = 10V, Driver Outputsopen or loadedLM5032 SNVS344B MARCH2005 IINvs VINF igure3. IINvs VINF igure4. ICCvs ExternallyAppliedVCCF igure5. VCCvs VINF igure7. OscillatorFrequencyvs RTResistorFigure6. VCCvs ICC(ExternallyLoaded)8 SubmitDocumentationFeedbackCopyright 2005 2014, Current (2A)TEMPERATURE (oC)-50050100150||4904924944964985005025 04506508510 Current LIMIT THRESHOLD@ CS1, CS2 (mV)-50050100150 TEMPERATURE (oC)190192194196198200202204206208210 FREQUENCY @ OUT1, OUT2 (kHz)-50050100150RT = (oC)020406080020406080100 MAXIMUM DUTY CYCLE (%)VOLTAGE AT VIN (V)R1 = 150 k:R2 = 10 k:Figure DUTY CYCLE (%)RDCL/RTUVLO Pin = DUTY CYCLE (%)VOLTAGE AT UVLO PIN (V) MARCH2005 REVISEDDECEMBER2014 TypicalCharacteristics(continued)Figure9 .

9 MaximumDutyCyclevs. UVLOV oltageFigure8. UserDefinedMaximumDutyCyclevs RDCLR esistorFigure10. MaximumDutyCyclevs. VIN (Figure24)Figure11. Frequencyvs. TemperatureFigure12. Soft-StartPin Currentvs TemperatureFigure13. CurrentLimitThresholdat CS1,CS2vsTemperatureCopyright 2005 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback9 ProductFolderLinks:LM5032LM5032 SNVS344B MARCH2005 LM5032containsall the featuresnecessaryto implementtwo independentlyregulatedcurrentmodedc/dcco nverters,or a singlehighcurrentconvertercomprisedof two parallelinterleavedchannelsusingthe two controllersoperate180 out of phasefroma commonoscillator, completePWMcontroller,currentsenseinput, soft-startcircuit,and bothchannelsare the startupand VCCregulator,line under-voltagelockout,2 MHzcapableoscillator,maximumduty cyclecontrol,and the hiccupmodefault (OUT1,OUT2)are designedto turn-off-time, ,slopecompensation,and the 2005 2014, SERIESREGULATORVCC DisableDrivers OffRamp1 Ramp2 MaxDC1 PWMComp 2 Controller 1 RestartDrivers OffUVLOMaxDC2 MaxDC1 MaxDC2 PWML atchQSRQPWML atchQSRQPWMComp 2 ILim1 ILim2DC2DC1 Soft-start 142k42kSupport FunctionsVCC UVTVCC UVTSoft-start 2 BIAS VOLTAGEGENERATORRT/SYNCDCLOSCILLATOR& RAMPGENERATORCLK1, 2 UserMaxDC1, 2 SLOPE1, 2 RAMP1, ,2 Clk1, ,2 VrefDriver EnableDrivers OffRestartDriver EnableDriver EnableRestartLatchUserMaxDC1 UserMaxDC2 RestartRestartLatchPWM25k5k5k5kVCCVCC-VU VLOCLK1 OUT1+50 nsOUT2+50 MARCH2005 2005 2014,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback11 ProductFolderLinks: LM5032 Drivers OffUVLO VTHERMAL SHUTDOWNMax.

10 Duty Cycle Limiter202 AVPWRVCCVCC1. 25VR1R2LM5032LM5032 SNVS344B MARCH2005 ,UVLO,ShutdownThe LM5032containsa line under-voltagelockoutcircuit(UVLO)designe dto enablethe VCCregulatorandoutputdriverswhenthe systemvoltage(VPWR) exceedsthe desiredlevel(seeFigure14). VPWRis the voltagenormallyappliedto the transformerprimary,and usuallyconnectedto the VIN pin (seethe schematicon Page1). The thresholdat the UVLO comparatoris externalresistordividerconnectedfromVPWR to the UVLOpin whenVPWRis increasedto the belowthe thresholdthe VCCregulatorand outputdriversare disabled,and the internal20 A currentsourceis threshold,the comparatoroutputswitcheslow to enablethe internalcircuitsand the 20 A 20 A flowsinto the externaldivider s junction,raisingthe voltageat UVLO, voltageat UVLO alsodrivesthe MaximumDutyCycleLimitercircuit(described below),whichmayinfluencethe valueschosenfor the UVLOpin maximumVPWR, thevoltageat UVLO shouldnot exceed6V.