Hi Ubaid,

What kind of resonant converter are you using? If it's a phase-shifted full bridge (PSFB) converter, I have personal experiences with this matter that might be useful to you (the same reason below might be true for other resonant converters such as LLC converters, but I can't be sure about it since I don't know much about them yet) :

In a PSFB converter, in each cycle and at the times that the power is about to start to transfer to the secondary-side, the junction capacitance of secondary diodes resonates with the transformer leakage inductance and the primary-side resonant inductor. This resonance can causes huge spikes on the secondary-diodes and can destruct them, if not managed properly. There are a few ways to manage these spikes for this topology. Now, in my experience, I have even seen these spikes for the case of a full-bridge rectifier on the secondary side (and it has also been reported in the literature); so, I'm not sure why your observation has been different.

hi,

kindly check this link:

https://www.electronics-tutorials.ws/diode/diode_6.html

Dear Ubaid,

In full bridge rectification the output capacitance bank helps to clamp the drain to source voltage. However, in center tapped rectification the leakage of your transformer appears in series between the switches and the output capacitance bank. Moreover, the leakage of your transformer is most likely bigger because of the mechanical construction, with two secondary side windings.

BR,