LLC变压器设计软件

Application for single AC stage input Vin 220Vac Vin range Vinnom 110Vdc 输入电压参数

Vinmin 70Vdc Vinmax

110Vdc Output information Vo 24Vdc 输出参数Io 21A Vf 0.6Vdc Po

516.6W Frequency information Fr 150KHz normalized frequency Xmax 1.5开关频率参数

Fmax 225KHz Fstart

375KHz Coss 800pF Cstray an additional Cstray 100pF Minimum dead time Td 200nS

conversion ratio Mnom 0.223636364增益

Mmin 0.223636364Mmax 0.351428571a at nominal voltage a 2.235772358k 5.004E+15

Kmax 10Knom 10

physical turn ratio Nn 2.131725301Qmax1, to stay in the ZVS region at min. Vin and max.load

Qmax10.220292203effective load resistance:

4.517659297

HB midpoint estimated parasitic capacitance Calculate k so that the converter will work at xmax at zero load and max. input voltage

Qmax2, to ensure ZVS at zero load:

Qmax2 1.239577095

Choose Qs, such that Qs =

Zr 0.945444863Cs 1122.257871nF Ls 1.00314814uH Lp 10.0314814uH Parameters of L6599

Cf 470

pF Rfmin 11.77154255Koh m Rfmax 4.304790048Koh m Rss 2.253270455Koh m Css

1.331398099

0.50.5

311.08正常输入电压

=Vinnom1*1.414*0.9*0.85最小输入电压

=Vinnom1*1.414*1.1最大输入电压

输出电压输出电流输出二极管的正向压降

=(Vo+Vf)*Io输出功率

谐振网络

的谐振频

率

=Xmax*Fr 最大工作频率

=Fr*2.5起机频率

最小死区

时间

=(Vo+Vf)/Vinnom正常增益=(Vo+Vf)/Vinmax最小增益=(Vo+Vf)/Vinmin最大增益=(0.9~1.1)/2/Mnom等效圈比=2*a*Mmin/(1-2*a*Mmin)*(1-

1/Xmax^2)

=MIN(k,Kmax)

=a*(knom/(1+knom))^0.5

=1/(knom*2*a*Mmax)*(((2*a*

Mmax)^2)/((2*nn*Mmax)^2-

1)+knom)^0.5

=8*a^2*Vo/(3.1415927^2*Io)