LLC自动计算公式(输入数据即可)

1.PFCcalculationsDRAFTVAC_min90Vacminimummainsinputvoltage(rms)UserinputVAC_max277Vacmaximummainsinputvoltage(rms)CalculationresultVboost_min415VdcminimumPFCoutputvoltageDatasheetparameterVboost_nom430VdcmaximumPFCoutputvoltagePo90Woutputpowereff0.92efficiencyPFC+LLCPin97.8WinputpowerIp_max3.38Amaximumpeakcurrent(incl+10%)Fs_min30000HzFs_minatVboost_minLp972uHcalculatedprimaryinductanceLp_corr250uHchosenprimaryinductancesmallAeconversiontool:Ae0.00010m2effectivearea96.6mm2Bmax0.220TBmaxcore1E-04m2Np39.8minimumnumberofturnsNp_corr40chosennumberofprimaryturnsBmax_calc0.219TNa2.3maximumnumberofPFCauxturnsV_OCR_OCP0.50VIp_max3.38AVmargin0.05VRsense_current_pfc133.06mOhmVregulation_SNSBOOST=2.5VV_BOOST_nominal=430VR_BOOST_1=4.7Mohm4704.7MR_BOOST_2=4.7Mohm4700Rmeasure_BOOST=55.0kOhm4.7MPowerinR_BOOST_totalP_R_BOOST_total20mWpowerinbleeder55.0kBoostelcapVboost_peak452Vpeak-voltageatPFCstart-up=OVPHBCstart-stopVboost_start_HBC396VHBCbrownoutVboost_stop_HBC275VHBCbrownoutR1=2000kOhmR2=2000kOhmR2=R12000kR3=560kOhm560220nFR4=47kOhm4702000kRv=466kOhmVBrown-Out=67.6Vac0560kCmains220nFRdischarge2466kOhm47kRxC=542msDesignsummary:Vinrangemains90277VacVboostrange415430VdcPout,max90WmaximumPFCpeakcurrent3.4APFCcoil250uHPFCcoil&aux402.3TurnsresistorvalueforPFCcurrentmeasurement133mOhmnominalBoostvoltage430Vvalues:R_BOOST1+2,Rmeasure_BOOST9.400.055MohmBOOST,HBCbrown-outstart,stopvoltage396275VMainsbrown-outvoltage67.6VacMainsbrown-outresistorsonmainsR1,R220002000kOhmMainsbrown-outresistorsonSNSMAINSR3,R456047kOhmcapacitorvalueacrossmains220nFRCdischargemains542msMainsdischargeSNSBOOSTBrownOutin-andoutputparametersPFCinductorcalculationsPFCcurrentsenseresistor2.HBCcalculations0DRAFTVboost_nom430VReminderfromchoiceinPFCcalculationsVin_max415VMaxinputvoltage.UserinputVin_min430VMininputvoltage.CalculationresultVout_max60VMaxoutputvoltage.DatasheetparameterIout_max1.5AMaxoutputcurrent.Pout_max90.00WMaxoutputpower.Ns16TNumberofsecondaryturns.Np50TNumberofprimaryturns.Ae180mm2Effectivecrossectionalcorearea.Lp1400uHTotalprimaryinductance=Lm+LrLr225uHLeakageinductanceoftransformer.Lm1175uHMagneticinductanceoftransformer.Bmax370mTMax.coreexcitationlimit@100CGain_10.83FullLoadGain@Vin_max(1.00~1.03isrecommended)Gain_20.80FullLoadGain@Vin_minNt3.1TurnRatioofNp/Ns.N2.9EffectiveTurnRatioI_Lm0.5AMaxLmpeakcurrent.I_Lpk0.76AMaxResonantpeakcurrent.Lm1175uHMaganeticinductanceoftransformer.halfbridgeLLCresonantconverterscheme400nsestimateddeadtimeTon_max6.59usMaxontime@resonantfreq.B_opr.75mTOperationfluxdensitylevel.B_ratio20.3%RatioofSaturation.Lr,ext0uHexternallyaddedresonantinductanceLr225uHValueofresonantinductance.Cr22nFValueofresonantcapacitance.Vcr_min-165.9VMinimumvoltageoverCr.Vcr_max249.1VMaximumvoltageoverCr.fr.172kHzResonantfreq.ofLr&Cr.fr.229kHzResonantfreq.ofLm+Lr&Cr.RL40OhmResistiveequivalantofmax.output[e-mail]90Watt122Vout_in_M_graph60.00V29kHz72kHzspaceSNSFBspace2Fr2Cfmin330pF56.8123.63FrequencyrangeFmin56.8kHz56.874.18SNSFBrange28.72.0412fr1+2RFMAX36kOhmI_RFMAX69.44uAFmax180.45kHznominalfrequencylimit=670kHzI_CFMIN476.39uAmustbelessthan930uAmaxiumfrequencybyregulationSNSFB131.00kHz60%oftotalrangeC_SSHBCEN330nF000V_start3.0V324.7524.75SSHBC/ENV_high_to_lowcharge5.6V5.65.362530.11301.203.208.4V_end8.0V8.423.153.21358.21.258.23.2588.4I_charge_low40uA8.4558.213I_charge_high160uA02.208Tsoftstart25.16msatnormalsoftstartconditions58.22.2588SNSCURHBCvoltageonSNSBOOSTatVin_min=2.59VcompensationcurrentSNSCURHBCatVin_min=-22uAlimitcurrentto170uA:-22uAvirtualnewprotectionlevel(higherthan0.5V)=0.48VCr22nFCr_parallel470pFIres_protection_regulation5.6Apppeak-to-peakvalueoftotalprimaryresonantcurrentlimitingregulation(+0.5V,-0.5V)Rm2.1OhmIres_protection11Apppeak-to-peakvalueoftotalprimaryresonantcurrentforprotection--HF(+1V,-1V)Rcc1000OhmcompensationresistorIres_protection_regulation_at_Vin_min5.4AppatVin_minDesignsummary:Vinrange430415V470pFVout60VIout,max2APout,max90W22nFTransformerNp,Ns5016Turnsresonantfrequency172kHz2.1Ohmresonantfrequency129kHz0Lr225uHCr22nFtotalfrequencyrange57180kHzSNSFBfrequencyrange57131kHzcapacitorvalueonCFMIN330pFcapacitorvalueonRFMAX36kOhmHBCnormalsoft-starttime25msSNSCURHBCregulation&protectionlevelResonantTankFrequencyrangeInput&OutputTransformerSoftstarttimeNote:Thefrequencyrangecalculationcanbeusedforestimation.Theresultingvaluescandeviatealittledependingonthechosenvalues.Practicalverificationisadvised.Additionalleakageinductance(optional)050100150200FrequencyrangeSNSFBrangefr1+2f[kHz]02468010203040506070[V]t[ms]SSHBC/ENsoft-startVBOOST17,SNSCURHBCRcc=1kCr_parallelCrIresRmVBOOST17,SNSCURHBCRcc=1kCr_parallelCrIresRm0.00.20.40.60.81.01.21.41.61.82.0101001000gainMfrequency[kHz]Gain-frequencycurve023456890Cap/indborderlineSpecificpowerP(operation)MminMmaxf2f1IresLrLmNp:NsCrD1D2VOVIN+-IresLrLmNp:NsCrD1D2VOVIN+-capacitorvalueonSSHBC/EN330nFPrimarycurrentprotectionlevel(regulation)5.6AppcapacitorvalueparalleltoCr470pFresistorvaluef