Recently, I am studying and analyzing the schematic in 120-V AC, 200-W, 90% Efficiency, Interleaved Flyback for
Battery Charging Applications Reference Design, which uses a LM5032 to realize the AC to fixed voltage DC function.
But I can't figure out what the function of these two parts in the schematic.
I'm a high school students. I don't have much knowledge, so please explain it with details (like: after Q3 off, the direction of voltage on L(aux) is up, and the voltage is xxx, then Q2 on....(by the way, when Q3 off, does the voltage of auxiliary coil equal to 16.8 V ? )).
Thanks!
As it shown in the following screenshot:
