l6599设计表格表格文件下载.xls

1、summarizes the calculation results and shows the basic electrical schematicIt is recommended to use the workbook starting from the first sheet and proceeding following the order shown.In each worksheet,cyan cells refer to data that must be entered by the User,yellow cells refer to calculation result

2、s which needsa further check or a standard value choice.ELECTRICAL SPECIFICATIONS:enter data into cyan cellsConverter specification:NOTES:Nominal supply BUS voltage:V.dc.nom=390（V）where the operating frequency equals the resonant frequency f.sw=f.rMinimum supply BUS voltage:V.dc.min=320（V）depending

3、on the hold-up capability of the PFC pre-regulatorMaximum supply BUS voltageV.dc.max=420（V）depending on the OVP level of the PFC pre-regulatorNominal output voltage:V.out=200（V）output requirementsMaximum output power:P.out=400（W）Output voltage ripple:Vout=100（mV）Expected efficiency:%=97.5%only reson

4、ant converter circuitPre-design choices:Minimum operating frequency:f.sw.min=75（kHz）suggestion:1:2 rangeMaximum operating frequency:f.sw.max=150（kHz）Stray capacitance at half-bridge node:C.stray=120（pF）foreseen value without C.oss contributionSecondary output rectifier configuration:K.conf=2K.conf=1

5、 in case of full bridge rectificationK.conf=2 in case of transformer center tap windingHALF-BRIDGE MOSFET SELECTION:enter data into cyan cellsHalf-bridge mosfet stress:I.MOS=2.014（A rms）estimated max operating drain currentV.DS=420（V）max operating drain-source voltageV.（br）.DSS=500（V）suggested break

6、down voltageR.（DS）on=0.300（）suggested ON resistance at 25CSelect the suitable mosfet from Your data-base and write the required parameter values below:Mosfet type:STP14NK50ZFPFill with your selected part numberChosen mosfet parameters:R.DS.on=0.35（）ON resistance at 25C（from mosfet data-sheet）k.mos=1

7、.6Temperature multiplier for Rds.ON at 100CC.oss=90（pF）Effective drain capacitanceOUTPUT DIODE SELECTION:Output diode stress:I.DIODE=1.571（A rms）estimated max diode rms currentI.D.avg=1.000（A avg）estimated max diode avg currentV.RRM=480（V）minimum suggested breakdown voltage（with 20%derating）Select t

8、he suitable diode from Your data-base and write the required parameter values below:Diode type:STTH8L06FPFill with your selected part numberChosen diode parameters:V.F=1.06（V）diode forward drop threshold（from diode data-sheet）R.d=36（m）diode dynamic resistanceI.R=240（A）diode leakage currentPower loss

9、es:Max total power dissipation:P.diss.tot=10.256（W）for expected efficiency Mosfet power dissipation:P.d.mos=4.578（W）（total dissipation of half-bridge mosfets）Diode power dissipation:P.d.rect=2.394（W）（total dissipation of output diodes）OUTPUT CAPACITOR SELECTION:Output voltage ripple:Vout=100（mV）Max

10、capacitor ESR:ESR.max=32（m）Capacitor ripple current:I.o.ac.max=0.967（A）HALF-BRIDGE RESONANT CONVERTER DESIGN:enter data into cyan cellsParameters choice:Resonance frequency:f.r=118（kHz）select a value between f.sw.min and f.sw.msxMargin factor for Q.min value:k.marg=0.94starting value in the range:0.

11、80-0.95Calculations:Ideal transformer transfer ratio:n=0.970Maximum required gain:M.max=1.219Minimum required gain:M.min=0.929Max normalized frequency:f.n.max=1.271AC equivalent resistance:R.ac=76.649（）Inductance ratio（L.r/L.m）:=0.202Minimum quality factor value:Q.zvs=0.441Min operating frequency:f.

12、sw.Min=75.063（kHz）In case the calculated min frequency f.sw.Min is lowerMinimum normalized frequency:f.n.min=0.636or higher than the expected frequency f.sw.min,pleaseincrease or decrease the resonance frequency f.r,unlessPlease check=f.sw.min=75（kHz）you accept the obtained minimum switching frequen

13、cy value.Calculated resonant capacitor value:C.r=39.930（nF）Please use the higher standard value:C.r.std=40（nF）Transformer turn ratio:N.T=1.063Transformer leakage inductance:L.r=45.000（H）Transformer primary inductance:L.p=268.000（H）Primary side rms currentI.prim.rms=2.859（A）Secondary side rms current

14、I.sec.rms=1.571（A）Please check=X=0.088In case the relationship:Tg X is not verified,Tg=0.094choose a lower value for k.marg,and iterate the process.L6599 PERIPHERAL COMPONENTS DESIGN:enter data into cyan cellsMinimum operating frequency:f.sw.Min=75.06（kHz）From resonant stage calculation sheetMaximum operating frequency:f.sw.max=150.00（kHz）From electrical spec sheetStart-up frequency:f.start=300（kHz