PowerSupplyTopologies
?TexasInstruments,thePowerBehindYourDesigns
TypeBUCKBOOSTBUCKBOOSTSEPICFLYBACKFORWARD2SWITCHFORWARDACTIVECLAMPFORWARDHALFBRIDGEPUSHPULLFULLBRIDGEPHASESHIFTZVT
ofConverter(Inverting)
D1L
D1L
D4Q2D1LC2Q2D1LQ3Q2D1LQ3Q2L1
LLL1D1D1LNPNSCO
Q1D1
NNCNNC1CCC
CircuitCPSOPSD2CONNCNSOOD1O
D1D1PSD2ON
LPNPNSD2COQ2P
D1COCQ1LCQ1L2CO
Con?gurationQ1OONSNPNSD2
Q1Q1
Q1C1Q1Q4Q1Q4Q1L2
D3Q1D2D2D2
D3Q2Q1
VtVT1VtDVDVTVVNtNVNtNVNtNVNtNVNtNVNtNVNtN
IdealTransferOUT=(ON))=DOUT=(P)=OUT=-((ON)=-OUT=()OUT=DxPxOUTOUT=(()S)xON=()SxDOUT=(((S)xON))=SxDOUT=(((S)xON))=SxDOUT=(()S)()xON=SxDOUT=2x(()S)()xON=2xSxDOUT=2x(()S)()xON=2xSxDOUT=2x(()S)()xON=2xSxD
FunctionVINTPVINTP-tON(1-D)VINTP-tON1-DVIN1-DVIN2xIOUTxLPVINNPTPNPVINNPTPNPVINNPTPNPVINNPTPNPVINNPTPNPVINNPTPNPVINNPTPNP
11DVINxtONNSNSNSNSNSNSNS
DrainIQ1(max)=IOUTIQ1(max)=IOUTx()IQ1(max)=IOUTx()IQ1(max)=IOUTx()IQ1(max)=()IQ1(max)=()xIOUTIQ1(max)=()xIOUTIQ1(max)=()xIOUTIQ1(max)=()xIOUTIQ1(max)=()xIOUTIQ1(max)=()xIOUTIQ1(max)=()xIOUT
Current1-D1-D1-DLPNPNPNPNPNPNPNP
Drain(NP)1
VDS=VINVDS=VOUTVDS=VIN-VOUTVDS=VIN+VOUTVDS=VIN+VOUTxVDS=2xVINVDS=VINVDS=VINx()VDS=VINVDS=2xVINVDS=VINVDS=VIN
VoltageNS1-D
DiodeIOUTIOUTIOUT1
ID1=IOUTx(1-D)ID1=IOUTID1=IOUTID1=IOUTID1=IOUTID1=IOUTxDID1=IOUTxDID1=IOUTxDID1=(IOUTxD)+x(1-2D)ID1=(IOUTxD)+x(1-2D)ID1=(IOUTxD)+x(1-2D)ID1=xIOUT
Current2222
DiodeReverseNSNSNSNS1VINNSNSNSNS
VD1=VINVD1=VOUTVD1=VIN-VOUTVD1=VOUT+VINVD1=VOUT+VINx()VD1=VOUT+VINx()VD1=VOUT+VINx()VD1=VOUT+VINx()x()VD1=x()VD1=VINx()VD1=VINx()VD1=VINx()
VoltageNPNPNPNP1-D2NPNPNPNP
PWMPWMPWMPWMPWMPWMPWMPWMPWMPWMPWMPWM
VINVINVINVINVINVINVINVINVINVINVINVIN
VoltageandVDS(Q1)VDS(Q1)VDS(Q1)VDS(Q1)VDS(Q1)VDS(Q1)VDS(Q1)VDS(Q1)VDS(Q1)VDS(Q1)VDS(Q1)VDS(Q1)
IQ2
CurrentIQ1IQ1IQ1IQ1IQ1IQ1IQ1IQ1IQ1IQ2IQ1IQ2IQ1IQ2IQ1
WaveformsID1ID1ID1ID1ID1ID1ID1ID1ID1ID2ID1ID2ID1ID2ID1ID2
IL2
ILILILILILILILILILILILIL
VVVVVSVSVSVSVSVSVSVS
ExcludesripplecurrentandtONtON
tONttONttON
TPTPONtONtONtONtONON
TPtONTT
outputdiodevoltagedrop.TPTPTPTPTPPTPTPP
Goto:power.ti.comandApplicationNotes:ApplicationNotes:ApplicationNotes:ApplicationNotes:ApplicationNotes:ApplicationNotes:ApplicationNotes:ApplicationNotes:ApplicationNotes:ApplicationNotes:ApplicationNotes:ApplicationNotes:
placeliteraturenumberinUnderstandingBuckPowerStagesUnderstandingBoostPowerStagesUnderstandingBuck-BoostPowerStagesVersatileLowPowerSEPICConverterDesignofFlybackTransformers25-WForwardConverter150-WOff-LineForwardConverterActiveClampandResetTechniqueEnhancesPracticalConsiderationsinCurrent1.5MHzCurrentModeICControlledTheUC3823A,BandUC3825A,BEnhancedDesigningaPhaseShiftedZeroVoltage
the“KeyWord”box.inSwitchmodePowerSupplies(SLVA057)inSwitchmodePowerSupplies(SLVA061)inSwitchmodePowerSupplies(SLVA059A)AcceptsWideInputVoltageRange(SLUA158)andInductors(SEM400)DesignReview(SLUA276)DesignReview(SEM400)ForwardConverterPerformance(SEM1000)ModePowerSupplies(SLUA110)50-WattPowerSupply(SLUA053)GenerationofPWMControllers(SLUA125)TransitionPowerConverter(SEM900)
PredictiveGateDriveBoostsHighVoltagePowerSupplyUsingaTPS6755EvaluationUsingtheHighPowerFactorPreregulatorDiscontinuousCurrentFlybackMultipleOutputForwardPracticalConsiderationsinCurrentDesignConsiderationsforActiveZeroVoltageSwitchingResonantTheUC3823A,BandUC3825A,BEnhancedPracticalConsiderationsinCurrentDesignReview:500-W,40-W/in3Phase
ForSEMtopics,goto:ConverterEfficiency(SLUA281)HighlyIntegratedDC/DCConverter(SLVA137)TPS6735(SLVA010)UsingtheSEPICConverter(SEM900)ConverterDesign(SEM300)ConverterDesign(SEM1200)ModePowerSupplies(SLUA110)ClampandResetTechnique(SEM1100)PowerConversion(SLUA159)GenerationofPWMControllers(SLUA125)ModePowerSupplies(SLUA110)ShiftedZVTPowerConverter(SEM900)
power.ti.com/seminarsControllers:Controllers:Controllers:Controllers:Controllers:Controllers:Controllers:Controllers:Controllers:Controllers:Controllers:Controllers:
TPS40000TPS40050UCC3800UCC38C42UC3572UCC38C42UCC3800UCC38C42UCC35701UCC28220UCC35701UCC28220UCC35701UCC28220UCC2891,2,3,4,7UCC28025UCC3806UCC28025UCC3806UCC28025UCC3806UCC3895
TPS62000TPS62040TPS61100UCC3809-1TPS40050TPS40060TPS43000UCC3800UCC3809-1UCC3800UCC3809-1UCC3800UCC3809-1UCC3580-1UCC3808AUC3825A,BUCC3808AUC3825A,BUCC3808AUC3825A,BUC3879
TPS54610TPS54350TPS61042TPS6734TPS6755TPS61130UCC38C42UCC2891UCC38C42UCC2891UCC38C42UCC2891UC3824UCC38083UCC38083UCC38083UC3875
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