SLUS515G –SEPTEMBER 2002–REVISED DECEMBER …

1 UDG 0212512348765 VCCDRVGNDZCDVO_SNSCOMPMULTINCSUCC38050 ProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityReferenceDesignUCC28050,UCC280 51,UCC38050,UCC38051 SLUS515G SEPTEMBER2002 REVISEDDECEMBER2015 UCC2805x,UCC3805xTransitionMode PFC Controller1 Features3 DescriptionThe UCC38050and UCC38051are PFCcontrollers1 TransitionModePFCC ontrollerfor Lowforlow-to-mediumpowerapplicationsrequ iringImplementationCostcompliancewithIEC 1000-3-2harmonicreduction IndustryPin designedfor a boostSetpreregulatoroperatingin transitionmode(alsoreferredto as boundary-conductionmodeor critical ImprovedTransientResponseWithSlew-Rateco nduction-modeoperation).

2 TheyfeatureaComparatortransconductancevo ltageamplifierfor feedbackerror ZeroPowerDetectto PreventOvervoltageprocessing,a simplemultiplierfor generatingaProtection(OVP)DuringLightLoa dConditionscurrentcommandproportionalto the inputvoltage,a AccurateInternalVREFfor TightOutputcurrent-sense(PWM)comparator, PWMlogic,and aRegulationtotem-poledriverfor drivingan externalFET. Two UVLOO ptionsIn the transitionmodeoperation,the PWMcircuitis OVP,Open-FeedbackProtection,and Enableself-oscillating,with the turnonbeinggovernedby aninductorzero-currentdetector(ZCDpin),a ndtheCircuitsturnoffbeinggovernedbythecu rrent-sense ,thecontrollerprovides Low Start-Upand OperatingCurrentsfeaturessuchas peakcurrentlimit,defaulttimer, Lead(Pb)-FreePackagesovervoltageprotecti on(OVP)and (1)2 ApplicationsPARTNUMBERPACKAGEBODYSIZE(NO M)

3 Single-StagePFCF lybackConvertersfor LightingUCC28050,SOIC(8) MotorDrivesUCC28051, Switch-ModePowerSuppliesfor Desktops,UCC38050,PDIP(8) ,TVs,and Set Top Boxes(STBs)(1) For all availablepackages,see the orderableaddendumat AC AdapterFront-EndPowerSuppliesthe end of the datasheet. ElectronicBallastsSimplifiedApplicationD iagram1An IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand ,UCC28051,UCC38050,UCC38051 SLUS515G SEPTEMBER2002 Applicationand Pin Configurationand Deviceand Mechanical,Packaging,and RevisionHistoryChangesfromRevisionF (March2009)

4 To RevisionGPage AddedESDR atingstable,FeatureDescriptionsection,De viceFunctionalModes,Applicationand Implementationsection,PowerSupplyRecomme ndationssection,Layoutsection,Deviceand DocumentationSupportsection,andMechanica l,Packaging,and 2002 2015,TexasInstrumentsIncorporatedProduct FolderLinks:UCC28050 UCC28051 UCC38050 UCC38051 LVAC(min)2 VOUT2 VAC(min)2Fs(min)VOUTPIN=()( ) GNDDRVVCCZCDCOMPVO_SNSMULTINCS12348765 UCC28050,UCC28051,UCC38050, SEPTEMBER2002 REVISEDDECEMBER20155 Pin Configurationand FunctionsD or P Package8-PinSOICor PDIPTop ViewPin the connectedbetweenthis pin and outputcurrentcapabilityof this pin is 10- A undernormalconditions,but increasesto approximately1-mAwhenthe differentialinputis greaterthantheCOMP2 Ospecifiedvaluesin the voltageis one of the inputsto the multiplier,witha dynamicinputrangeof V to V.

5 Duringzeropoweror overvoltageconditions,this V V, the zeropowercomparatoris activated,whichpreventsthe pin sensesthe instantaneousswitchcurrentin the boostswitchand usesit as the internalrampfor internalcircuitryfiltersout addition,an externalR-C filter may be requiredto internalclampon the multiplieroutputterminatesthe switchingcycleif this V. Additionalexternalfilteringmay be thresholdisapproximatelyequalto:CS4I(1)V OFFSETis approximately75 mV to improvethe gatedriveoutputfor an outputis capableof deliveringup to 750-mA peakcurrentsduringturn-onand externalgatedriveresistormay be neededtoDRV7 Olimit the peakcurrentdependingon the UVLO threshold.

6 Theoutputis held chip bypassingelementsare connectedto groundpin with shortestGND6 pin sensesthe instantaneousboostregulatorinputvoltaget hrougha as one of the inputsto the 0 Vto V at high supplyvoltagefor the pin shouldbe bypassedwith a high-frequencycapacitor( F) and tied to UCC38050has a V that allowsuse of a lowervaluesupplycapacitoron this pin for quickerandVCC8 UCC38051has a narrowUVLO hysteresiswith of V, and a start-up voltageof for applicationswherethe operationof the PFCdevicemustbecontrolledby a pin sensesthe boostregulatoroutputvoltagethrougha ,this pin isthe invertinginputto the transconductanceamplifier(witha nominalvalueof V)

7 And also isVO_SNS1 Iinputto the ,pullingthis pin belowthe ENABLE thresholdturnsoffthe outputswitching,ensuringthat the gatedriveis held off whilethe boostoutputis pre-charging,and also ensuringno runawayif the feedbackpathis the boostinductorcurrentis indirectlysensedthroughthe bias windingon the ZCDpin inputgoeslow whenthe inductorZCD5 Icurrentreacheszeroand that transitionis providedto preventthis pin fromgoingbelowgroundor too zerocurrentis not detectedwithin400 s, a resettimersets the latchand 2002 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLinks.

8 UCC28050 UCC28051 UCC38050 UCC38051 UCC28050,UCC28051,UCC38050,UCC38051 SLUS515G SEPTEMBER2002 (unlessotherwisenoted)(1)MINMAXUNITS upplyvoltage,VCC(Internallyclamped)20 VInputcurrentinto VCCclampIDD30mAInputcurrentZCD 10mAGatedrivecurrent(peak),IDRVDRV 750mAInputvoltage,VCCVO_SNS,MULTIN,CS5 VMaximumnegativevoltageVO_SNS,MULTIN,DRV ,CS package650mWPowerdissipationat TA= 50 CP package1 WOperatingjunctiontemperaturerange,TJ 55150 CStoragetemperature,Tstg 65150 CLeadtemperature1,6 mm (1/16inch)300 Cfromcasefor 10 seconds(1)Stressesbeyondthoselistedunder AbsoluteMaximumRatingsmay causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions.

9 Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay (HBM),per ANSI/ESDA/JEDECJS-001(1) 2000VV(ESD)ElectrostaticdischargeCharged -devicemodel(CDM),per JEDEC specificationJESD22- 500VC101(2)(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a (unlessotherwisenoted)MINNOMMAXUNITVCC inputvoltagefroma low-impedancesourceVCCOFF+ 1 V18 VOperatingjunctiontemperature,TJ 40125 ,UCC3805xTHERMALMETRIC(1)D (SOIC)P (PDIP)UNIT8 PINS8 PINSR C/WR JC(top)Junction-to-case(top) C/WR C/W C/W C/W(1)For moreinformationabouttraditionaland new thermalmetrics,see theSemiconductorand IC PackageThermalMetricsapplicationreport, 2002 2015,TexasInstrumentsIncorporatedProduct FolderLinks.

10 UCC28050 UCC28051 UCC38050 UCC38051 UCC28050,UCC28051,UCC38050, SEPTEMBER2002 0 C to 70 C for the UCC3805x, 40 C to +105 C for the UCC2805x,TA= TJ, VCC= 12 25 mA181920 VSupplycurrent,offVCC= VCCturnonthreshold 300 mV75125 ASupplycurrent,disabledVO_SNS= V24mASupplycurrent,on75 kHz,CL= 0 nF46mASupplycurrent,dynamicoperating75 kHz,CL= 1 (VO_SNS) (VREF) AVCOMP highVO_SNS= 25 C, VCOMP= V6090130 SUCCx8050VO_SNS= V, VCOMP= V V, VCOMP= V 200 300 400 ASinkcurrentVO_SNS= V, VCOMP= ENABLEUCCx8050 VREF+ + + + + + constant(k)VMULTIN= V, COMP= ,VMULTININPUT0 to to , to to 4 VInputbias current, AZEROPOWERZ eropowercomparatorthreshold(1)Measuredon (1)Ensuredby 2002 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLinks.