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UCC28740 Constant-Voltage Constant-Current …

4 V 5%VOCVO utput current (IO)Output Voltage (VO)3 V2 V1 VVDDVSFBHVDRVCSGNDUCC28740 SOIC-7 CVDDRS1 VAUXNARS2 RLCRCSVBULKCB2CB1+ VACNPNSVOUTCOUTRTLRFB1 RFB2 ZFBC opyright 2017, texas instruments IncorporatedProductFolderOrderNowTechnic alDocumentsTools &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand JULY2013 REVISEDJULY2017 UCC28740 constant -VoltageConstant-CurrentFlybackC ontrollerUsingOptocoupledFeedback11 Features1 Lessthan10-mWNo-LoadPowerCapability OptocoupledFeedbackfor CV, andPrimary-SideRegulation(PSR)for CC Enables 1% VoltageRegulationand 5%CurrentRegulationAcrossLine and Load 700-VStartupSwitch 100-kHzMaximumSwitchingFrequencyEnablesH igh-Power-DensityChargerDesigns Resonant-RingValley-SwitchingOperationfo rHighestOverallEfficiency FrequencyDitheringto EaseEMI Compliance ClampedGate-DriveOutputfor MOSFET Overvoltage,Low-Line,and OvercurrentProtectionFunctions SOIC-7 Package Createa CustomDesignUsingthe UCC28740 Withthe WEBENCH PowerDesigner2 Applications USB-CompliantAdaptersand ChargersforConsumerElectronics SmartPhones Tabl

VDD VS FB HV DRV CS GND UCC28740 SOIC-7 R C VDD S1 V AUX N A R S2 R LC RCS V BULK + C B1 C B2 V AC NP S V OUT C OUT R TL R FB1 FB2 Z FB Copyright © 2017, Texas Instruments Incorporated 4 V ±5% V OCV Output Current (I O)

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Transcription of UCC28740 Constant-Voltage Constant-Current …

1 4 V 5%VOCVO utput current (IO)Output Voltage (VO)3 V2 V1 VVDDVSFBHVDRVCSGNDUCC28740 SOIC-7 CVDDRS1 VAUXNARS2 RLCRCSVBULKCB2CB1+ VACNPNSVOUTCOUTRTLRFB1 RFB2 ZFBC opyright 2017, texas instruments IncorporatedProductFolderOrderNowTechnic alDocumentsTools &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand JULY2013 REVISEDJULY2017 UCC28740 constant -VoltageConstant-CurrentFlybackC ontrollerUsingOptocoupledFeedback11 Features1 Lessthan10-mWNo-LoadPowerCapability OptocoupledFeedbackfor CV, andPrimary-SideRegulation(PSR)for CC Enables 1% VoltageRegulationand 5%CurrentRegulationAcrossLine and Load 700-VStartupSwitch 100-kHzMaximumSwitchingFrequencyEnablesH igh-Power-DensityChargerDesigns Resonant-RingValley-SwitchingOperationfo rHighestOverallEfficiency FrequencyDitheringto EaseEMI Compliance ClampedGate-DriveOutputfor MOSFET Overvoltage,Low-Line,and OvercurrentProtectionFunctions SOIC-7 Package Createa CustomDesignUsingthe UCC28740 Withthe WEBENCH PowerDesigner2 Applications USB-CompliantAdaptersand ChargersforConsumerElectronics SmartPhones TabletComputers Cameras StandbySupplyfor TV and Desktop WhiteGoods3 DescriptionTheUCC28740isolated-flybackpo wer-supplycontrollerprovidesConstant-Vol tage(CV)usinganopticalcouplerto improvetransientresponseto (CC)

2 RegulationisaccomplishedthroughPrimary-S ideRegulation(PSR) auxiliaryflybackwindingfor precisehigh-performancecontrolofoutputvo ltageand ,dynamicallycontrolledoperatingstates,an d a tailoredmodulationprofilesupportultra-lo wstandbypowerwithoutsacrificingstartupti me or the UCC28740allowoperatingefficienciesto meetor a (DCM) switchingfrequencyandprimarycurrent-peak amplitude(FMandAM)keepstheconversioneffi ciencyhigh acrossthe entireload and line controllerhas a maximumswitchingfrequencyof100 kHz and alwaysmaintainscontrolof the peak-primarycurrentin the minimumswitchingfrequencyof 170 Hzfacilitatesthe achievementof lessthan10-mWno-load (1)PARTNUMBERPACKAGEBODYSIZE(NOM)UCC2874 0 SOIC(7) (1) For all availablepackages,see the orderableaddendumatthe end of the Diagram2 UCC28740 SLUSBF3C JULY2013 : UCC28740 SubmitDocumentationFeedbackCopyright 2013 2017,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryNOTE.

3 Pagenumbersfor previousrevisionsmay differfrompagenumbersin the (December2014)to RevisionCPage Movedthe timingparametersfromtheElectricalCharact eristicstableto Deletedquasifromquasi-resonantin theTransformerTurnsRatio,Inductance, AddedtheDevelopmentSupport,Documentation Support,ReceivingNotificationof DocumentationUpdates, (July2013)to RevisionBPage AddedESDR atingstable,FeatureDescriptionsection,De viceFunctionalModes,Applicationand Implementationsection,PowerSupplyRecomme ndationssection,Layoutsection,Deviceand DocumentationSupportsection,andMechanica l,Packaging,and (July2013)to RevisionAPage ChangedmarketingstatusfromProductPreview to JULY2013 REVISEDJULY2017 ProductFolderLinks: UCC28740 SubmitDocumentationFeedbackCopyright 2013 2017,TexasInstrumentsIncorporated5 Pin Configurationand FunctionsD Package7-PinSOICTop ViewPin current -sense(CS)inputconnectsto a ground-referencedcurrent-senseresistorin serieswith the resultingvoltagemonitorsand controlsthe seriesresistoris addedto thispin to compensatefor peakswitch-currentlevelsas the (DRV)is an outputthat drivesthe gateof an feedback(FB)inputreceivesa currentsignalfromthe internalcurrentmirrordividesthe feedbackcurrentby and appliesit to an internalpullupresistorto generatea controlvoltage,VCL.

4 The voltageat this resistordirectlydrivesthe controllaw function,whichdeterminesthe switchingfrequencyand the peakamplitudeof the The ground(GND)pin is boththe referencepin for the controller,and the low-sidereturnfor the takento returnall AC-decouplingcapacitorsas closeas possibleto this pin and avoidanycommontracelengthwith high-voltage(HV)pin may connectdirectly,or througha seriesresistor,to the rectifiedbulk voltageandprovidesa chargeto the VDDcapacitorfor the startupof the the bias-supplyinputpin to the carefullyplacedbypasscapacitorto GNDis requiredon (VS)is an inputusedto providedemagnetizationtimingfeedbackto the controllerto limitfrequency,to controlconstant-currentoperation,and to is also usedforAC-mainsinput-voltagedetectionfor pin connectsto a voltagedividerbetweenan auxiliarywindingand valueof the upperresistorof this dividerprogramsthe AC-mainsrun and stop thresholds,and factorsinto line compensationat the CS JULY2013 : UCC28740 SubmitDocumentationFeedbackCopyright 2013 2017,TexasInstrumentsIncorporated(1)Stre ssesbeyondthoselistedunderAbsoluteMaximu mRatingsmay causepermanentdamageto the stressratingsonly and functionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditionsis not absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.

5 (2)All voltagesare with respectto positiveinto, negativeout of the (1)and(2).MINMAXUNITVHVS tart-uppin voltage,HV700 VVVDDB iassupplyvoltage,VDD38 VIDRVC ontinuousgate-currentsink50mAIDRVC ontinuousgate-currentsourceSelf-limiting mAIFBP eakcurrent,VS1mAIVSP eakcurrent,FB DRV ,CS ,FB ,VS 55150 CTstgStoragetemperature 65150 C(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a (ESD)ElectrostaticdischargeHuman-bodymod el(HBM),per ANSI/ESDA/JEDECJS-001(1) 2000 VCharged-devicemodel(CDM),per JEDEC specificationJESD22-C101(2) (unlessotherwisenoted) FIFBF eedbackcurrent,continuous50 AIVSVS pin current ,out of pin1mATJO peratingjunctiontemperature 40125 C(1)For moreinformationabouttraditionaland new thermalmetrics,see theSemiconductorand IC (1) UCC28740 UNITD (SOIC)7 PINSR C/WR JC(top)Junction-to-case(top) C/WR JBJunction-to-boardthermalresistance89 C/W C/W JULY2013 REVISEDJULY2017 ProductFolderLinks.

6 UCC28740 SubmitDocumentationFeedbackCopyright 2013 2017,TexasInstrumentsIncorporated(1)This deviceautomaticallyvariesthe controlfrequencyand currentsensethresholdsto improveEMI frequencylimitsrepresentaveragelevels.(2 )The overvoltagethresholdlevelat VS decreaseswith increasingtemperatureby mV/ C. This compensationis includedto ,VVDD= 25 V, HV = open,VFB= 0 V, VVS= 4 V, TA= 40 C to +125 C, TJ= TA(unlessotherwisenoted)PARAMETERTESTCON DITIONSMINTYPMAXUNITHIGH-VOLTAGESTARTUPI HVS tart-upcurrentout of VDDVHV= 100 V, VVDD= 0 V, startstate100250500 AIHVLKG25 Leakagecurrentat HVVHV= 400 V, run state,TJ= 25 ABIASSUPPLYINPUTIRUNS upplycurrent,runIDRV= 0, run ,waitIDRV= 0, wait state95125 AISTARTS upplycurrent,startIDRV= 0, VVDD= 18 V, startstate,IHV= 01830 AIFAULTS upplycurrent,faultIDRV= 0, fault state95130 AUNDERVOLTAGELOCKOUTVVDD(on)VDDturnonthr esholdVVDDlow to high192123 VVVDD(off)VDDturnoffthresholdVVDD high to INPUTVVSNCN egativeclamplevelIVSLS= 300 A, voltsbelowground190250325mVIVSBI nputbias currentVVS= 4 V AFB INPUTIFBMAXFull-rangeinputcurrentfSW= fSW(min)

7 162330 AVFBMAXI nputvoltageat full rangeIFB= 25 A, TJ= 25 ,linearized IFB= 20 A, centeredat IFB= 15 A, TJ=25 C101418k CS INPUTVCST(max)MaximumCS thresholdvoltageIFB= 0 A(1)738773810mVVCST(min)MinimumCS thresholdvoltageIFB= 35 A(1)170194215mVKAMAM-controlratioVCST(ma x)/ VCST(min) 300 A, IVSLS/ currentout of CS ,VCS= 1 V180230280nsDRIVERSIDRSDRV sourcecurrentVDRV= 8 V, VVDD= 9 V2025mARDRVLSDRVlow-sidedriveresistanceI DRV= 10 mA612 VDRCLDRV clampvoltageVVDD= 35 V1416 VRDRVSSDRV pulldownin start-state150190230k PROTECTIONVOVPO vervoltagethresholdAt VS input,TJ= 25 C(2) CS (run)VS line-senserun currentCurrentout of VS pin increasing190225275 AIVSL(stop)VS line-sensestop currentCurrentout of VS pin decreasing7080100 AKVSLVS line senseratioIVSL(run)/ IVSL(stop) (stop)Thermal-shutdowntemperatureInterna ljunctiontemperature165 C6 UCC28740 SLUSBF3C JULY2013.

8 UCC28740 SubmitDocumentationFeedbackCopyright 2013 2017,TexasInstrumentsIncorporated(1)This deviceautomaticallyvariesthe controlfrequencyand currentsensethresholdsto improveEMI ,VVDD= 25 V, HV = open,VFB= 0 V, VVS= 4 V, TA= 40 C to +125 C, TJ= TA(unlessotherwisenoted)PARAMETERTESTCON DITIONSMINTYPMAXUNITfSW(max)Maximumswitc hingfrequencyIFB= 0 A(1)91100106kHzfSW(min)Minimumswitchingf requencyIFB= 35 A(1) s170175180185190195200205210-50-25025507 5100125 VCST(min) - Minimum CS Threshold Voltage (mV) TJ - Temperature (oC) C005 310315320325330335340345350-50-250255075 100125 VCCR - Constant-Current Regulation Factor (mV) TJ - Temperature (oC) C006 04080120160200240280320-50-2502550751001 25 IHV - HV Startup current ( A) TJ - Temperature (oC) C003 VHV = 100 V, VVDD = 0 V 050100150200250300-50-250255075100125VS Line-Sense current ( A) TJ - Temperature (oC) C004 IVSL(run) IVSL(stop) - Bias-Supply current (mA) VDD - Bias-Supply Voltage (V) C001 HV = Open Run State Wait State Start State VDD Turn-On VDD Turn-Off - Bias-Supply current (mA) TJ - Temperature (oC) C002 HV = Open IRUN, VDD = 25 V IWAIT, VDD = 25 V ISTART, VDD = 18 V JULY2013 REVISEDJULY2017 ProductFolderLinks: UCC28740 SubmitDocumentationFeedbackCopyright 2013 2017, 25 V, TJ= 25 C, = OpenFigure1.

9 Bias-SupplyCurrentvs. Bias-SupplyVoltageHV = OpenFigure2. Bias-SupplyCurrentvs. TemperatureVHV= 100 V, VVDD= 0 VFigure3. HV StartupCurrentvs. TemperatureFigure4. VS Line-SenseCurrentsvs. TemperatureFigure5. MinimumCS Thresholdvs. TemperatureFigure6. - FB Input Voltage (V) IFB - FB Input current ( A) C009 - VS Overvoltage Threshold (V) TJ - Temperature (oC) C010 140150160170180190200-50-250255075100125 fSW(min) - Minimum Switching Frequency (Hz) TJ - Temperature (oC) C007 2022242628303234-50-250255075100125 IDRS - DRV Source current (mA) TJ - Temperature (oC) C008 VDRV = 8 V, VVDD = 9 V 8 UCC28740 SLUSBF3C JULY2013 : UCC28740 SubmitDocumentationFeedbackCopyright 2013 2017,TexasInstrumentsIncorporatedTypical Characteristics(continued)VVDD= 25 V, TJ= 25 C, MinimumSwitchingFrequencyvs. TemperatureVDRV= 8 V, VVDD= 9 VFigure8.

10 DRVS ourceCurrentvs. TemperatureFigure9. FB InputVoltagevs. FB InputCurrentFigure10. VS OvervoltageThresholdvs. Temperature14 k 480 k 10 k 190 k SQQR+ + + + VDD25 mA14 VOC FaultLINE FaultLINE FaultOV FaultOC Fault5 V5 VOV V / VIHVVCSTVCLVOVPIFBIFB / / fSWVCSTIVSLSIVSLSIVSLS / KLCHVDRVCSGNDVSFBVDDPOWERAND FAULT MANAGEMENTCONTROLLAWUVLO21 V / VSAMPLERVALLEY SWITCHINGSECONDARY TIMING DETECTCURRENT REGULATIONLINE SENSEC opyright 2017, texas instruments JULY2013 REVISEDJULY2017 ProductFolderLinks: UCC28740 SubmitDocumentationFeedbackCopyright 2013 2017,TexasInstrumentsIncorporated7 UCC28740is a flybackpower-supplycontrollerwhichprovid eshigh-performancevoltageregulationusing anopticallycoupledfeedbacksignalfroma discontinuous-conductionmode(DCM)with valley-switchingto controllaw schemecombinesfrequencywith primarypeak-currentamplitudemodulationto providehigh conversionefficiencyacrossthe load providesa widedynamicoperatingrangeof outputpowerwhichallowsthe power-supplydesignertoeasilyachieveless than30-mWstandbypowerdissipationusinga standardshunt-regulatorand targetof less than10-mWstandbypower,carefulloss-manage mentdesignwith a low-powerregulatorandhigh-CTRoptocoupler is ,the power-managementfeaturesof the controllerreducethe device-operatingcurrentat switchingfrequenciesbelow32 and abovethis frequency,the UCC28740includesfeaturesin the modulatorto reducethe EMI peakenergyof the fundamentalswitchingfrequencyand completelow-costandlow component-countcharger-solutionis realizedusinga S1 OVPS2 ASOVFOVPRVRNVVVu u IN(run)


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