For UCC2891, there is an application note, SLUA303, titled " Designing for High Efficiency with the Active Clamp
UCC2891 PWM Controller". Here is link to it: http://focus.ti.com/lit/an/slua303/slua303.pdf On page 18 of this app note, in equation (40), the magnetizing inductance of Pulse Transformer, PA0810, is taken as 65 uH. However, Pulse's data Sheet shows this inductance as 0.65 uH. So, it is taken 100 times more.
This needs to get clarified, because this will affect the resonant capacitance. Please let me know asap.
regards
