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1.
GeneraldescriptionTheGreenChipisthelatestgenerationofgreenSwitchedModePowerSupply(SMPS)controllerICs.
TheTEA1755TcombinesacontrollerforPowerFactorCorrection(PFC)andaflybackcontroller.
Itshighlevelofintegrationenablescost-effectivepowersupplydesignusingaverylownumberofexternalcomponents.
ThePFCoperatesinQuasi-Resonant(QR)orDiscontinuousConductionMode(DCM),withvalleyswitching.
Thespeciallybuilt-ingreenfunctionsprovidehighefficiencyatallpowerlevels.
AthighpowerlevelstheflybackoperatesinQRmodeorDCMwithvalleydetection.
Atmediumpowerlevels,theflybackcontrollerswitchestoFrequencyReduction(FR)modeandlimitsthepeakcurrenttoanadjustableminimumvalue.
Inlowpowermode,thePFCswitchesofftomaintainhighefficiency.
Atverylowpowerlevels,whentheflybackswitchingfrequencydropsbelow25kHz,theflybackconverterswitchestoburstmode.
Duringthenon-switchingphaseofburstmode,theinternalICsupplycurrentisminimizedtofurtheroptimizeefficiency.
Valleyswitchingisusedinalloperatingmodes.
Theadvancedburstmodeensureshigh-efficiencyatlowpowerandgoodstandbypowerperformancewhileminimizingaudibletransformernoise.
TheTEA1755TisaMulti-ChipModule,(MCM),containingtwochips.
Theproprietaryhigh-voltageBCD800processmakesdirectstart-uppossiblefromtherectifieduniversalmainsvoltageinaneffectiveandgreenway.
ThesecondlowvoltageSilicon-On-Insulator(SOI)isusedforaccurate,high-speedprotectionfunctionsandcontrol.
TheTEA1755Tenableseasydesignofhighlyefficientandreliablesuppliesupto250W.
Thesepowersupplydesignsarecost-effective,requiringtheminimumnumberofexternalcomponents.
Remark:Allvaluesinthisdocumentaretypicalvaluesunlessotherwisestated.
TEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontrollerRev.
1.
1—13March2015ProductdatasheetTEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
NXPSemiconductorsN.
V.
2015.
Allrightsreserved.
ProductdatasheetRev.
1.
1—13March20152of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller2.
Featuresandbenefits2.
1DistinctivefeaturesIntegratedPFCandflybackcontrollerUniversalmainssupplyoperationbetween70V(AC)to276V(AC)Dual-boostPFCwithaccuratemaximumoutputvoltage(NXPSemiconductorspatented)Highlevelofintegration,resultsincost-effectivedesignswithverylowexternalcomponentcountsAdjustablePFCswitchoffdelayExternalPFCswitchonandswitchoffoverrideAccuratePFCswitchonandswitchoffcontrol(NXPSemiconductorspatentpending)2.
2GreenfeaturesOn-chipstart-upcurrentsourceReducedICsupplycurrentduringburstmodeenablingErPlot6Power-downfunctionalityforverylowstandbypower2.
3PFCgreenfeaturesValley/Zero-VoltageSwitching(ZVS)forminimumswitchinglosses(NXPSemiconductorspatented)FrequencylimitationreducesswitchinglossesPFCswitchedoffwhenalow-loadisdetectedattheflybackoutput2.
4FlybackgreenfeaturesValleyswitchingforminimumswitchinglosses(NXPSemiconductorspatented)Frequencyreductionwithadjustableminimumpeakcurrentatlow-poweroperationmaintainshigh-efficiencyatlowoutputpowerlevelsBurstmodeoperationatverylow-powerlevelsforhigh-efficiencyoperation2.
5ProtectionfeaturesSaferestartmodeforsystemfaultconditionsContinuousmodeprotectionusingdemagnetizationdetectionforbothconverters(NXPSemiconductorspatented)UnderVoltageProtection(UVP)(foldbackduringoverload)AccurateOverVoltageProtection(OVP)forbothconverters(adjustableforflybackconverter)MainsvoltageindependentOverPowerProtection(OPP)Opencontrolloopprotectionforbothconverters.
Theopen-loopprotectionontheflybackconverterissaferestartOverTemperatureProtection(OTP)LowandadjustableOverCurrentProtection(OCP)triplevelforbothconvertersGeneral-purposeinputforlatchedprotection,forusewithsystemOverTemperatureProtection(OTP)TEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
NXPSemiconductorsN.
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2015.
Allrightsreserved.
ProductdatasheetRev.
1.
1—13March20153of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller3.
ApplicationsThedevicecanbeusedinallapplicationsrequiringanefficientandcost-effectivepowersupplysolutionforupto250W.
Notebookadaptersinparticularbenefitfromthehighlevelofintegration4.
Orderinginformation5.
BlockdiagramTable1.
OrderinginformationTypenumberPackageNameDescriptionVersionTEA1755T/1SO16plasticsmalloutlinepackage;16leads;bodywidth3.
9mmSOT109-1Fig1.
TEA1755Tblockdiagram7,0(5V7,0(5V3)&SURWHFWLRQ9R2939WK926(16(WRQ5('8&7,211($52932&33)&GULYHUHQDEOH3)&VWDUWVWRS3)&P93)&JDWH9$//(VOVP(VOSENSE)),thePFCcontrollerstopsswitchinguntiltheVVOSENSEVstart(VINSENSE)again.
WhentheVCCpinvoltagedropsundertheUVLOlevel,bothcontrollersstopswitchingandentersaferestartmode.
Inthesaferestartmode,theVCCpincapacitorisrechargedusingtheHVpin.
Atverylowburstmoderepetitionrates,VCCcandropundertheUVLOlevel.
TheUVLOprotectionfeatureVprot(UVLO)preventsthedecreasewhentheICisinburstmode.
TEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
1.
1—13March20157of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller7.
1.
2Power-downmodeThepower-downmodecanbeactivatedforverylowstandbypowerapplicationsbypullingtheVVINSENSE50%orVFBCTRLis>3.
75V,thePFCcircuitisalsoswitchedon.
7.
2.
7PFCswitchoffdelay(PFCTIMERpin)WhentheflybackconverterswitchingfrequencyinFRmodeisfsw(fb)swon(PFC)(73kHz).
Atthesamemoment,thePFCstageisalsoswitchedon.
ConnectacapacitortothePFCTIMERpin(seeSection7.
2.
7)topreventthePFCfromswitchingoffduetoadynamicloadthatleadstorepetitivecrossingoffsw(fb)swoff(PFC)andfsw(fb)swon(PFC).
A1nFminimumcapacitorvalueisrecommendedtopreventnoiseinfluencingthePFCswitchon/switchoffbehavior.
ThePFCTIMERpincapacitorisalsodischargedwhentheflybackmaximumswitchingfrequencyishigherthan53kHz.
ThisfeaturepreventsPFCon/offtogglingduringdynamicloadscausingtheflybacktooperaterepetitivelynearfsw(fb)swoff(PFC)andfsw(fb)swon(PFC).
ItisalsopossibletocontrolPFCswitch-onandswitchoffexternally.
WhenVPFCTIMERisdrivenbelow1.
03V,thePFCstageison.
WhenthePFCTIMERpinvoltageisdrivenabove4.
4V,thePFCstageisswitchedoff.
TheexternalcontroloverridesthePFCstagecontrolbytheflybackcontroller(seeFigure6).
ThePFCTIMERpinhasaninternalclampcircuitstartingaround10Vwithacurrentcapabilityof0.
1mA7.
2.
8Dual-boostPFCThemainsinputvoltagemodulatesthePFCoutputvoltage.
ThemainsinputvoltageismeasuredusingtheVINSENSEpin.
IfVVINSENSE5.
5V,theresistorisdisconnected.
Thepinisbiasedwitha29Acurrent.
WhenVFBCTRL>7.
75V,afaultisassumed,switchingisstoppedandarestartismade.
Ifacapacitorandresistorareconnectedinseriestothepin,atime-outfunctioniscreatedwhichprotectsagainstopencontrolloopsituations.
SeeFigure12andFigure13.
Thetime-outfunctionisdisabledbyconnectingaresistor(200k)togroundontheFBCTRLpin.
Ifthepinisshort-circuitedtoground,switchingoftheflybackcontrollerisstopped.
Undernormaloperatingconditions,theconverterregulatestheoutputvoltage.
VFBCTRLvariesbetween0.
77Vatminimumoutputpowerand4.
9Vatmaximumoutputpower.
Fig11.
Flybackpartpeakcurrentcontrol9)%&75/9P9P9IO\EDFN)5PRGH3)&RII3)&RQDDD6(16(UHVLVWRUSHDNYROWDJH)%6(16(RIIVHWYROWDJH9VHQVHIEPD[EXUVWPRGH)%6(16(SHDNYROWDJHIO\EDFN'&0RU45TEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
1.
1—13March201517of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller7.
3.
6Burstmodeoperation(FBCTRLpin)Theflybackcontrollerenterstheburstmodewhentheoutputpowerisverylowandtheswitchingfrequencyis2.
4VVCCVth(UVLO)TheburstcycleisstoppedwhenVFBCTRL2.
8V(seeFigure14).
Fig12.
Time-outprotectioncircuitFig13.
TEA1755Ttime-outprotection(signals)andsaferestartDDD)%&75/$N999WLPHRXWDDD999)%&75/RXWSXWYROWDJHWDUJHWRXWSXWYROWDJHUHDFKHGZLWKLQWLPHRXWWLPHUHVWDUWWDUJHWRXWSXWYROWDJHQRWUHDFKHGZLWKLQWLPHRXWWLPHTEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
1.
1—13March201518of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller7.
3.
7Soft-start(FBSENSEpin)Topreventaudibletransformernoiseduringstart-up,thesoft-startfunctionslowlyincreasesthetransformerpeakcurrent.
PlaceacapacitorCSS2inparallelwithresistorRSS2(seeFigure15)toimplementthesoft-startfunction.
Aninternalcurrentsourcechargesthecapacitorto:(5)withamaximumof0.
55V.
ThestartlevelandthetimeconstantoftheincreasingprimarycurrentlevelcanbeadjustedexternallybychangingthevaluesofRSS2andCSS2.
(6)Thesoft-startcurrentIstart(soft)fbswitchesonwhenVCCreachesVstartup.
WhentheVFBSENSEreaches0.
55V,theflybackconverterstartsswitching.
ThechargingcurrentIstart(soft)fbflowswhentheVFBSENSEis75VVCC75VVCC75V;VtripVstop(VINSENSE)afterVstart(VINSENSE)isdetected52050nAVbst(dual)dualboostvoltagehighlevel2.
082.
282.
48Vlowlevel1.
882.
082.
28Vswitch-overregion120200280mVVth(sel)clmpclampselectthresholdvoltageonpinVINSENSE1.
922.
1VVth(sel)clmp(hys)clampselectthresholdvoltagehysteresis60100140mVVth(pd)power-downthresholdvoltage285385485mVVth(pd)exitexitpower-downthresholdvoltageVCC=0V335460585mVVhys(pd)power-downhysteresisvoltage4575105mVLoopcompensationPFC(PFCCOMPpin)gmtransconductanceVVOSENSEtoIO(PFCCOMP)577797A/VIO(PFCCOMP)outputcurrentonpinPFCCOMPVVOSENSE=2V;VPFCCOMP=2.
75V303744AVVOSENSE=3.
3V;VPFCCOMP=2.
75V1088868AIen(PFCCOMP)enablecurrentonpinPFCCOMP-55-AVclamp(PFCCOMP)clampvoltageonpinPFCCOMPlow-powermode;PFCoff;lowerclampvoltage.
[1]VINSENSEVth(sel)clmp+Vth(sel)clmp(hys)onpinVINSENSE;VVOSENSE=2V[2]3.
23.
323.
44VVINSENSE81.
922.
04Vupperclampvoltage3.
63.
753.
9Vhigh-powermode;PFCon;uni-directionalsourceclamp;IPFCCOMP=30A;VVOSENSE=2.
5V1.
922.
1VTable5.
Characteristics…continuedTamb=25C;VCC=20V;allvoltagesaremeasuredwithrespecttoground(pin2);currentsarepositivewhenflowingintotheIC;unlessotherwisespecified.
SymbolParameterConditionsMinTypMaxUnitTEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
1.
1—13March201524of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontrollerVton(PFCCOMP)zerozeroon-timevoltageonpinPFCCOMP3.
43.
53.
6VPulse-widthmodulatorPFCton(PFC)PFCon-timeVVINSENSE=3.
3V;VVOSENSE=2V;VPFCCOMP=Vclamp(PFCCOMP)1.
82.
83.
8sVVINSENSE=1V;VVOSENSE=2V;VPFCCOMP=Vclamp(PFCCOMP)172737sOutputvoltagesensingPFC(VOSENSEpin)Vth(start)VOSENSEstartthresholdvoltageonpinVOSENSEopen-loop1.
051.
11.
15VVth(stop)VOSENSEthresholdstopvoltageonpinVOSENSE0.
9511.
05VVhys(VOSENSE)hysteresisvoltageonpinVOSENSEVth(start)VOSENSEVth(stop)VOSENSE75100125mVVreg(VOSENSE)regulationvoltageonpinVOSENSEforIO(PFCCOMP)=0A2.
4752.
52.
525VVOVP(VOSENSE)ton=0s2.
592.
622.
65VIbst(dual)dualboostcurrentVVINSENSE1V;VFBCTRL=5V9.
18.
17.
1AVVINSENSE=4V50255nAOvercurrentprotectionPFC(PFCSENSEpin)Vsense(PFC)maxmaximumPFCsensevoltageV/t=0V/s465495525mVtd(PFCDRIVER)delaytimeonpinPFCDRIVERVPFCSENSEpulse-stepping400mVaroundVsense(PFC)max-50-nstleb(PFC)PFCleadingedgeblankingtimeVPFCSENSE=0.
75V230290350nsIprot(PFCSENSE)protectioncurrentonpinPFCSENSE50-5nASoft-startPFC(PFCSENSEpin)Istart(soft)PFCPFCsoftstartcurrent736047AVstart(soft)PFCPFCsoftstartvoltageenablingvoltage0.
450.
50.
55VVstop(soft)PFCPFCsoftstopvoltagedisablingvoltage0.
40.
450.
5VOscillatorPFCfsw(PFC)maxmaximumPFCswitchingfrequency119139159kHztoff(PFC)minminimumPFCoff-timesecondarystroke1.
251.
551.
85sValleyswitchingPFC(PFCAUXpin)(V/t)vrec(PFC)PFCvalleyrecognitionvoltagechangewithtime--1.
7V/stto(vrec)PFCPFCvalleyrecognitiontime-outtime34.
25.
4sTable5.
Characteristics…continuedTamb=25C;VCC=20V;allvoltagesaremeasuredwithrespecttoground(pin2);currentsarepositivewhenflowingintotheIC;unlessotherwisespecified.
SymbolParameterConditionsMinTypMaxUnitTEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
1.
1—13March201525of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontrollerDemagnetizationmanagementPFC(PFCAUXpin)Vth(comp)PFCAUXcomparatorthresholdvoltageonpinPFCAUX1259055mVtto(demag)PFCPFCdemagnetizationtime-outtime394857sIprot(PFCAUX)protectioncurrentonpinPFCAUXVPFCAUX=50mV75-5nAPFCoffdelay(PFCTIMERpin)Isource(PFCTIMER)sourcecurrentonpinPFCTIMERVPFCTIMER=2.
5V5.
44.
74ARsink(PFCTIMER)sinkresistanceonpinPFCTIMERVPFCTIMER=2.
5V45.
57kVstart(PFCTIMER)startvoltageonpinPFCTIMER0.
931.
031.
13VVstop(PFCTIMER)stopvoltageonpinPFCTIMER2.
8533.
15VVth(off)PFCTIMERswitch-offthresholdvoltageonpinPFCTIMERPFCoverridevoltage4.
24.
44.
6VDriver(PFCDRIVERpin)Isrc(PFCDRIVER)sourcecurrentonpinPFCDRIVERVPFCDRIVER=2V-0.
5-AIsink(PFCDRIVER)sinkcurrentonpinPFCDRIVERVPFCDRIVER=2.
5V-0.
7-AVO(PFCDRIVER)maxmaximumoutputvoltageonpinPFCDRIVER101112VOverVoltageProtectionflyback(FBAUXpin)Iovp(FBAUX)overvoltageprotectioncurrentonpinFBAUX279300321ADemagnetizationmanagementflyback(FBAUXpin)Vth(comp)FBAUXcomparatorthresholdvoltageonpinFBAUX6090120mVIprot(FBAUX)protectioncurrentonpinFBAUXVFBAUX=50mV65-5nAVclamp(FBAUX)clampvoltageonpinFBAUXIFBAUX=100A0.
750.
70.
65VIFBAUX=300A0.
870.
920.
97Vtsup(xfmr_ring)transformerringingsuppressiontime1.
72.
22.
7sPulsewidthmodulatorflybackton(fb)maxmaximumflybackon-time32.
538.
544.
5sTable5.
Characteristics…continuedTamb=25C;VCC=20V;allvoltagesaremeasuredwithrespecttoground(pin2);currentsarepositivewhenflowingintotheIC;unlessotherwisespecified.
SymbolParameterConditionsMinTypMaxUnitTEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
1.
1—13March201526of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontrollerOscillatorflybackfsw(fb)maxmaximumflybackswitchingfrequency110130150kHzVstart(red)ffrequencyreductionstartvoltagetransferfromDCM/QRtoFRmode3.
844.
2Vfsw(fb)swon(PFC)PFCswitch-onflybackswitchingfrequency707376kHzfsw(fb)swoff(PFC)PFCswitch-offflybackswitchingfrequency505356kHzfsw(fb)burst(ent)enterburstmodeflybackswitchingfrequencyenterburstmode212529kHzfsw(fb)burstburstmodeflybackswitchingfrequencynormaloperation3136.
542kHzVen(PFC)FBCTRLPFCenablevoltageonpinFBCTRLoverridevoltage3.
43.
754.
1VPeakcurrentcontrolflyback(FBCTRLpin)VFBCTRLvoltageonpinFBCTRLformaximumflybackpeakcurrent4.
64.
95.
2VVto(FBCTRL)time-outvoltageonpinFBCTRLenablevoltage5.
35.
55.
7Vtripvoltage7.
37.
758.
2VVth(burst)offoff-stateburstmodethresholdvoltageonpinFBCTRL0.
620.
770.
92VVth(burst)onon-stateburstmodethresholdvoltageonpinFBCTRL2.
22.
42.
6VVth(burst)exitexitburstmodethresholdvoltageonpinFBCTRL2.
62.
83VVburst(exit-on)burstmodevoltagedifferencebetweenexitandon-statepinFBCTRL=Vth(burst)exitVth(burst)on325390455mVVburst(on-off)burstmodevoltagedifferencebetweenon-stateandoff-statepinFBCTRL=Vth(burst)onVth(burst)off1.
51.
631.
76VRint(FBCTRL)internalresistanceonpinFBCTRL9.
813.
216.
5kIO(FBCTRL)outputcurrentonpinFBCTRLVFBCTRL=0V0.
750.
60.
45mAVFBCTRL=4.
5V0.
30.
240.
18mAIto(FBCTRL)time-outcurrentonpinFBCTRLVFBCTRL=6V352923ATable5.
Characteristics…continuedTamb=25C;VCC=20V;allvoltagesaremeasuredwithrespecttoground(pin2);currentsarepositivewhenflowingintotheIC;unlessotherwisespecified.
SymbolParameterConditionsMinTypMaxUnitTEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
1.
1—13March201527of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontrollerValleyswitchingflyback(HVpin)(V/t)vrec(fb)flybackvalleyrecognitionvoltagechangewithtime[3]75-+75V/std(vrec-swon)valleyrecognitiontoswitch-ondelaytime[3]-75-nsSoft-startflyback(FBSENSEpin)Istart(soft)fbflybacksoftstartcurrent756045AVstart(soft)fbflybacksoftstartvoltageenablevoltage0.
50.
550.
6VOverCurrentprotectionflyback(FBSENSEpin)Vsense(fb)maxmaximumflybacksensevoltageV/t=0V/s525545565mVVsense(fb)minminimumflybacksensevoltageV/t=0V/s221232243mVtd(FBDRIVER)delaytimeonpinFBDRIVERVFBSENSEpulse-stepping400mVaroundVsense(fb)max-80-nston(fb)minminimumflybackon-timeVFBCRTL=3V;VFBSENSE=0.
75V280340400nsIadj(FBSENSE)adjustcurrentonpinFBSENSE2.
292.
11.
91AOverPowerProtectionflyback(FBSENSEpin)Vsense(fb)maxmaximumflybacksensevoltageV/t=0V/sIFBAUX=80A525545565mVIFBAUX=120A495540565mVIFBAUX=240A400445490mVIFBAUX=360A345400455mVDriver(FBDRIVERpin)Isrc(FBDRIVER)sourcecurrentonpinFBDRIVERVFBDRIVER=2V-0.
5-AIsink(FBDRIVER)sinkcurrentonpinFBDRIVERVFBDRIVER=2.
5V-0.
7-AVO(FBDRIVER)(max)maximumoutputvoltageonpinFBDRIVER101112VLATCHinput(LATCHpin)Vprot(LATCH)protectionvoltageonpinLATCH469494519mVIO(LATCH)outputcurrentonpinLATCHVprot(LATCH)530.
528.
5AVen(LATCH)enablevoltageonpinLATCHatstart-up552582612mVTable5.
Characteristics…continuedTamb=25C;VCC=20V;allvoltagesaremeasuredwithrespecttoground(pin2);currentsarepositivewhenflowingintotheIC;unlessotherwisespecified.
SymbolParameterConditionsMinTypMaxUnitTEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
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1—13March201528of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller[1]AtypicalapplicationwithacompensationnetworkonthePFCCOMPpin,suchastheexampleinFigure3.
[2]TheclampvoltageonthePFCCOMPpinisdependentontheVINSENSEvoltage.
WhentheVVINSENSErisesaboveVth(sel)clmp+Vth(sel)clmp(hys),thehighclamplevelisactive.
WhenthevoltageontheVINSENSEpindropsbelowtheVth(sel)clmplevelagain,thelowclamplevelisactive.
[3]Guaranteedbydesign.
Vhys(LATCH)hysteresisvoltageonpinLATCHVen(LATCH)Vprot(LATCH)6888108mVVoc(LATCH)open-circuitvoltageonpinLATCH-1.
75-VTemperatureprotectionTpl(IC)ICprotectionleveltemperature135145155CTpl(IC)hyshysteresisofICprotectionleveltemperature[3]-10-CTable5.
Characteristics…continuedTamb=25C;VCC=20V;allvoltagesaremeasuredwithrespecttoground(pin2);currentsarepositivewhenflowingintotheIC;unlessotherwisespecified.
SymbolParameterConditionsMinTypMaxUnitTEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
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1—13March201529of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller11.
ApplicationinformationApowersupplywiththeTEA1755TconsistsofaPFCcircuitandaflybackconverter(seeFigure18).
CapacitorCVCCbufferstheICsupplyvoltage.
TheICsupplyvoltageispoweredusingthehighvoltagerectifiedmainsduringstart-upandtheauxiliarywindingoftheflybackconverterduringoperation.
SenseresistorsRSENSE1andRSENSE2convertthecurrentthroughtheMOSFETsS1andS2intoavoltageonthePFCSENSEandFBSENSEpins.
TheRSENSE1andRSENSE2valuesdefinethemaximumprimarypeakcurrentinMOSFETsS1andS2.
Intheexample,theLATCHpinisconnectedtoaNegativeTemperatureCoefficient(NTC)resistor.
TheprotectionisactivatedwhentheresistancedropsbelowavalueascalculatedinEquation8:(8)AcapacitorCTIMEOUTisconnectedtotheFBCTRLpin.
RLOOPensuresthatthetime-outcapacitordoesnotinterferewiththenormalregulationloop.
RS1andRS2areaddedtopreventthesoft-startcapacitorsfrombeingchargedduringnormaloperationduetonegativevoltagespikesacrossthesenseresistors.
ResistorRAUX1isaddedtoprotecttheICfromdamageduringlightningevents.
RS3andRCOMPareaddedtocompensateforinputvoltagevariations.
The(stray)capacitanceonthedrainofMOSFETS2affectsthefrequencyreductionslopeandtherefore,thePFCswitch-onandswitch-offlevels.
ChoosingthepropervaluesforRS3andRCOMPresultsinaninputvoltageindependentPFCswitch-onandswitch-offpowerlevel.
RDRV1andRDRV2preventtheoutputdriversfrombeingdamageddueto,forexample,powerMOSFETavalanche.
Intheapplication,theHVpinoftheICcaneitherbeconnectedtothecentertapoftheflybacktransformerortothedrainofMOSFETS2RefertoapplicationnoteAN11142formoredetailedinformation.
VprotLATCHIOLATCH16.
2k=TEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
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1—13March201530of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller(1)Intheapplication,theHVpinoftheICcaneitherbeconnectedtothecentertapoftheflybacktransformerortothedrainofMOSFETS2.
Fig18.
TEA1755Ttypicalapplicationdiagram*1'/$7&+9&&)%$8;)%6(16(3)&'5,9(5)%'5,9(53)&6(16(926(16(+93)&$8;3)&&2039,16(16()%&75/3)&7,0(5,&DDD7U''&&3)&7,0(5517&&9&&6'55&2035656&6656656(16(5'595'59565665656(16(5)%$8;&66&&EXON9287=7U5$8;9PDLQV&'555/223&7,0(2872372)(('%$&.
2372)(('%$&.
5&&&TEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
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ProductdatasheetRev.
1.
1—13March201531of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller12.
PackageoutlineFig19.
PackageoutlineSOT109-1(SO16);Z0$$$ES'+(/S4GHWDLO;(=HF/Y0$$$\SLQLQGH[81,7$PD[$$$ESF'(H+(//S4=\ZY5()(5(1&(6287/,1(9(56,21(8523($1352-(&7,21,668('$7(7$PPLQFKHVRR',0(16,216LQFKGLPHQVLRQVDUHGHULYHGIURPWKHRULJLQDOPPGLPHQVLRQV1RWH3ODVWLFRUPHWDOSURWUXVLRQVRIPPLQFKPD[LPXPSHUVLGHDUHQRWLQFOXGHG627(06PPVFDOH62SODVWLFVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP627TEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
NXPSemiconductorsN.
V.
2015.
Allrightsreserved.
ProductdatasheetRev.
1.
1—13March201532of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller13.
RevisionhistoryTable6.
RevisionhistoryDocumentIDReleasedateDatasheetstatusChangenoticeSupersedesTEA1755Tv.
1.
120150313Productdatasheet-TEA1755Tv.
1Modifications:Table3"Limitingvalues"hasbeenupdated.
TEA1755Tv.
120121025Productdatasheet--TEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
NXPSemiconductorsN.
V.
2015.
Allrightsreserved.
ProductdatasheetRev.
1.
1—13March201533of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontroller14.
Legalinformation14.
1Datasheetstatus[1]Pleaseconsultthemostrecentlyissueddocumentbeforeinitiatingorcompletingadesign.
[2]Theterm'shortdatasheet'isexplainedinsection"Definitions".
[3]Theproductstatusofdevice(s)describedinthisdocumentmayhavechangedsincethisdocumentwaspublishedandmaydifferincaseofmultipledevices.
ThelatestproductstatusinformationisavailableontheInternetatURLhttp://www.
nxp.
com.
14.
2DefinitionsDraft—Thedocumentisadraftversiononly.
Thecontentisstillunderinternalreviewandsubjecttoformalapproval,whichmayresultinmodificationsoradditions.
NXPSemiconductorsdoesnotgiveanyrepresentationsorwarrantiesastotheaccuracyorcompletenessofinformationincludedhereinandshallhavenoliabilityfortheconsequencesofuseofsuchinformation.
Shortdatasheet—Ashortdatasheetisanextractfromafulldatasheetwiththesameproducttypenumber(s)andtitle.
Ashortdatasheetisintendedforquickreferenceonlyandshouldnotbereliedupontocontaindetailedandfullinformation.
Fordetailedandfullinformationseetherelevantfulldatasheet,whichisavailableonrequestviathelocalNXPSemiconductorssalesoffice.
Incaseofanyinconsistencyorconflictwiththeshortdatasheet,thefulldatasheetshallprevail.
Productspecification—TheinformationanddataprovidedinaProductdatasheetshalldefinethespecificationoftheproductasagreedbetweenNXPSemiconductorsanditscustomer,unlessNXPSemiconductorsandcustomerhaveexplicitlyagreedotherwiseinwriting.
Innoeventhowever,shallanagreementbevalidinwhichtheNXPSemiconductorsproductisdeemedtoofferfunctionsandqualitiesbeyondthosedescribedintheProductdatasheet.
14.
3DisclaimersLimitedwarrantyandliability—Informationinthisdocumentisbelievedtobeaccurateandreliable.
However,NXPSemiconductorsdoesnotgiveanyrepresentationsorwarranties,expressedorimplied,astotheaccuracyorcompletenessofsuchinformationandshallhavenoliabilityfortheconsequencesofuseofsuchinformation.
NXPSemiconductorstakesnoresponsibilityforthecontentinthisdocumentifprovidedbyaninformationsourceoutsideofNXPSemiconductors.
InnoeventshallNXPSemiconductorsbeliableforanyindirect,incidental,punitive,specialorconsequentialdamages(including-withoutlimitation-lostprofits,lostsavings,businessinterruption,costsrelatedtotheremovalorreplacementofanyproductsorreworkcharges)whetherornotsuchdamagesarebasedontort(includingnegligence),warranty,breachofcontractoranyotherlegaltheory.
Notwithstandinganydamagesthatcustomermightincurforanyreasonwhatsoever,NXPSemiconductors'aggregateandcumulativeliabilitytowardscustomerfortheproductsdescribedhereinshallbelimitedinaccordancewiththeTermsandconditionsofcommercialsaleofNXPSemiconductors.
Righttomakechanges—NXPSemiconductorsreservestherighttomakechangestoinformationpublishedinthisdocument,includingwithoutlimitationspecificationsandproductdescriptions,atanytimeandwithoutnotice.
Thisdocumentsupersedesandreplacesallinformationsuppliedpriortothepublicationhereof.
Suitabilityforuse—NXPSemiconductorsproductsarenotdesigned,authorizedorwarrantedtobesuitableforuseinlifesupport,life-criticalorsafety-criticalsystemsorequipment,norinapplicationswherefailureormalfunctionofanNXPSemiconductorsproductcanreasonablybeexpectedtoresultinpersonalinjury,deathorseverepropertyorenvironmentaldamage.
NXPSemiconductorsanditssuppliersacceptnoliabilityforinclusionand/oruseofNXPSemiconductorsproductsinsuchequipmentorapplicationsandthereforesuchinclusionand/oruseisatthecustomer'sownrisk.
Applications—Applicationsthataredescribedhereinforanyoftheseproductsareforillustrativepurposesonly.
NXPSemiconductorsmakesnorepresentationorwarrantythatsuchapplicationswillbesuitableforthespecifiedusewithoutfurthertestingormodification.
CustomersareresponsibleforthedesignandoperationoftheirapplicationsandproductsusingNXPSemiconductorsproducts,andNXPSemiconductorsacceptsnoliabilityforanyassistancewithapplicationsorcustomerproductdesign.
Itiscustomer'ssoleresponsibilitytodeterminewhethertheNXPSemiconductorsproductissuitableandfitforthecustomer'sapplicationsandproductsplanned,aswellasfortheplannedapplicationanduseofcustomer'sthirdpartycustomer(s).
Customersshouldprovideappropriatedesignandoperatingsafeguardstominimizetherisksassociatedwiththeirapplicationsandproducts.
NXPSemiconductorsdoesnotacceptanyliabilityrelatedtoanydefault,damage,costsorproblemwhichisbasedonanyweaknessordefaultinthecustomer'sapplicationsorproducts,ortheapplicationorusebycustomer'sthirdpartycustomer(s).
Customerisresponsiblefordoingallnecessarytestingforthecustomer'sapplicationsandproductsusingNXPSemiconductorsproductsinordertoavoidadefaultoftheapplicationsandtheproductsoroftheapplicationorusebycustomer'sthirdpartycustomer(s).
NXPdoesnotacceptanyliabilityinthisrespect.
Limitingvalues—Stressaboveoneormorelimitingvalues(asdefinedintheAbsoluteMaximumRatingsSystemofIEC60134)willcausepermanentdamagetothedevice.
Limitingvaluesarestressratingsonlyand(proper)operationofthedeviceattheseoranyotherconditionsabovethosegivenintheRecommendedoperatingconditionssection(ifpresent)ortheCharacteristicssectionsofthisdocumentisnotwarranted.
Constantorrepeatedexposuretolimitingvalueswillpermanentlyandirreversiblyaffectthequalityandreliabilityofthedevice.
Termsandconditionsofcommercialsale—NXPSemiconductorsproductsaresoldsubjecttothegeneraltermsandconditionsofcommercialsale,aspublishedathttp://www.
nxp.
com/profile/terms,unlessotherwiseagreedinavalidwrittenindividualagreement.
Incaseanindividualagreementisconcludedonlythetermsandconditionsoftherespectiveagreementshallapply.
NXPSemiconductorsherebyexpresslyobjectstoapplyingthecustomer'sgeneraltermsandconditionswithregardtothepurchaseofNXPSemiconductorsproductsbycustomer.
Nooffertosellorlicense—Nothinginthisdocumentmaybeinterpretedorconstruedasanoffertosellproductsthatisopenforacceptanceorthegrant,conveyanceorimplicationofanylicenseunderanycopyrights,patentsorotherindustrialorintellectualpropertyrights.
Documentstatus[1][2]Productstatus[3]DefinitionObjective[short]datasheetDevelopmentThisdocumentcontainsdatafromtheobjectivespecificationforproductdevelopment.
Preliminary[short]datasheetQualificationThisdocumentcontainsdatafromthepreliminaryspecification.
Product[short]datasheetProductionThisdocumentcontainstheproductspecification.
TEA1755TAllinformationprovidedinthisdocumentissubjecttolegaldisclaimers.
NXPSemiconductorsN.
V.
2015.
Allrightsreserved.
ProductdatasheetRev.
1.
1—13March201534of35NXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontrollerExportcontrol—Thisdocumentaswellastheitem(s)describedhereinmaybesubjecttoexportcontrolregulations.
Exportmightrequireapriorauthorizationfromcompetentauthorities.
Non-automotivequalifiedproducts—UnlessthisdatasheetexpresslystatesthatthisspecificNXPSemiconductorsproductisautomotivequalified,theproductisnotsuitableforautomotiveuse.
Itisneitherqualifiednortestedinaccordancewithautomotivetestingorapplicationrequirements.
NXPSemiconductorsacceptsnoliabilityforinclusionand/oruseofnon-automotivequalifiedproductsinautomotiveequipmentorapplications.
Intheeventthatcustomerusestheproductfordesign-inanduseinautomotiveapplicationstoautomotivespecificationsandstandards,customer(a)shallusetheproductwithoutNXPSemiconductors'warrantyoftheproductforsuchautomotiveapplications,useandspecifications,and(b)whenevercustomerusestheproductforautomotiveapplicationsbeyondNXPSemiconductors'specificationssuchuseshallbesolelyatcustomer'sownrisk,and(c)customerfullyindemnifiesNXPSemiconductorsforanyliability,damagesorfailedproductclaimsresultingfromcustomerdesignanduseoftheproductforautomotiveapplicationsbeyondNXPSemiconductors'standardwarrantyandNXPSemiconductors'productspecifications.
Translations—Anon-English(translated)versionofadocumentisforreferenceonly.
TheEnglishversionshallprevailincaseofanydiscrepancybetweenthetranslatedandEnglishversions.
14.
4TrademarksNotice:Allreferencedbrands,productnames,servicenamesandtrademarksarethepropertyoftheirrespectiveowners.
GreenChip—isatrademarkofNXPSemiconductorsN.
V.
15.
ContactinformationFormoreinformation,pleasevisit:http://www.
nxp.
comForsalesofficeaddresses,pleasesendanemailto:salesaddresses@nxp.
comNXPSemiconductorsTEA1755THVstart-upDCM/QRflybackcontrollerwithintegratedDCM/QRPFCcontrollerNXPSemiconductorsN.
V.
2015.
Allrightsreserved.
Formoreinformation,pleasevisit:http://www.
nxp.
comForsalesofficeaddresses,pleasesendanemailto:salesaddresses@nxp.
comDateofrelease:13March2015Documentidentifier:TEA1755TPleasebeawarethatimportantnoticesconcerningthisdocumentandtheproduct(s)describedherein,havebeenincludedinsection'Legalinformation'.
16.
Contents1Generaldescription12Featuresandbenefits22.
1Distinctivefeatures22.
2Greenfeatures22.
3PFCgreenfeatures22.
4Flybackgreenfeatures22.
5Protectionfeatures23Applications34Orderinginformation.
35Blockdiagram36Pinninginformation.
46.
1Pinning46.
2Pindescription47Functionaldescription57.
1Generalcontrol57.
1.
1Start-upandUnderVoltageLockOut(UVLO).
.
57.
1.
2Power-downmode77.
1.
3Supplymanagement.
87.
1.
4Latchinput87.
1.
5Fastlatchreset87.
1.
6Overtemperatureprotection87.
2Powerfactorcorrectioncircuit87.
2.
1toncontrol(PFCCOMPpin)87.
2.
2Valleyswitchinganddemagnetization(PFCAUXpin)97.
2.
3Frequencylimitation97.
2.
4Mainsvoltagecompensation(VINSENSEpin).
97.
2.
5Soft-start(PFCSENSEpin)97.
2.
6PFCswitchon/switchoffcontrol.
107.
2.
7PFCswitchoffdelay(PFCTIMERpin)107.
2.
8Dual-boostPFC117.
2.
9Overcurrentprotection(PFCSENSEpin)127.
2.
10Mainsundervoltagelockout/brownoutprotection(VINSENSEpin)127.
2.
11Overvoltageprotection(VOSENSEpin)127.
2.
12PFCopen-loopprotection(VOSENSEpin).
.
127.
2.
13Driver(PFCDRIVERpin)127.
3Flybackcontroller127.
3.
1Multimodeoperation137.
3.
2Valleyswitching(HVpin)147.
3.
3Currentmodecontrol(FBSENSEpin)157.
3.
4Demagnetization(FBAUXpin)167.
3.
5Flybackcontrol/time-out(FBCTRLpin)167.
3.
6Burstmodeoperation(FBCTRLpin)177.
3.
7Soft-start(FBSENSEpin)187.
3.
8Maximumon-time197.
3.
9Overvoltageprotection(FBAUXpin)197.
3.
10Overcurrentprotection(FBSENSEpin)207.
3.
11Overpowerprotection.
207.
3.
12Driver(FBDRIVERpin)208Limitingvalues219Thermalcharacteristics2210Characteristics2211Applicationinformation2912Packageoutline.
3113Revisionhistory3214Legalinformation3314.
1Datasheetstatus3314.
2Definitions3314.
3Disclaimers3314.
4Trademarks3415Contactinformation3416Contents.
35