I am trying to understand the basic working principles of a Half Bridge SMPS with synchronous rectification. Whilst I understand the workings of a Half Bridge SMPS with diode rectification, I fail to understand/relate it to the diode rectifier version.
My understanding is that the diode rectifier version works as per the images below; when T1 is on, D1 is forward biased, and viceversa for T2.
However I cannot see it intuitively for the synchronous rectifier version:
I presumed the FETs would directly replace the diodes, however they are connected to ground unlike the diodes, which is one of the reasons to my confusion. I would greatly appreciate it if anyone could shed some light on this! Furthermore, if anyone has some decent literature on this topology please let me know, as I havnt seemed to find much regarding a half bridge with synchronous recification.