以前我用的是EE、EI、EF系列,沒用過EFD系列磁芯,向高手求EFD20變壓器設計,條件是:
Vin min :85V
Vout :33V 330mA
f=65K
D=0.5
求EFD20變壓器設計
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@fzhlpp
呵呵,我也用EFD的喔,你骨架哪里買的?我買的好貴,可以告訴我嗎?
Ae=29min,Ve=1460
Bmax=0.28
F=65KHZ.
DCM/CCM: 85%
PRI 2UEW D0.23mm*100Ts. Rpri=2.76 Ohm Ploss=0.173^2*2.76=0.08W
SEC TEX-e D0.3mm*40Ts. Psec=0.663 Ohm Plose=0.42^2*0.663=0.12W
Aux 2UEW D0.2mm*17Ts.
Core Loss=0.29W
Total Lose=0.08+0.12+0.29=0.49W.
預估變壓器溫度 85DegreeC at ambient 25DegreeC.
Bmax=0.28
F=65KHZ.
DCM/CCM: 85%
PRI 2UEW D0.23mm*100Ts. Rpri=2.76 Ohm Ploss=0.173^2*2.76=0.08W
SEC TEX-e D0.3mm*40Ts. Psec=0.663 Ohm Plose=0.42^2*0.663=0.12W
Aux 2UEW D0.2mm*17Ts.
Core Loss=0.29W
Total Lose=0.08+0.12+0.29=0.49W.
預估變壓器溫度 85DegreeC at ambient 25DegreeC.
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