Posted on October 22, 2012 at 19:43Dear All,
I am studding the application note AN2794 entitle “1KW dual stage DC-AC converter based on the STP160N75F3�.
At page 11 the equation for the filter inductor is Lmin>=(N1/N2)*Vin-Vout*(TonMax/
�?Ι)
From the prevous equations we have N1/N2=19
Vin=24, Vout=350, TonMax=5us ,
�?Ι=15%. Ι
out=0,43 so
(19*24-350)*5*10^-06/0,43=1,23mH but the result which refer to file is 1,109mH. How that occurs?
Another strange point is the
�?
tonMax. How that calculated?
Thanks in advance for your time.
Best regards to all
