hello to everyone hope you're doing well.
so i'm diving into the flyback converter from mains for the first time, i have a lot of salvaged ee ferrite cores that are waiting for me, so i thought that flyback topology would be a good start, i'm going to use something like Viper27 ncp1014 or the tinyswitch3 (tny264 and 279)(already on hand) power range of 10-20w.
i've watched this:
https://training.ti.com/understanding-basics-flyback-converterDCM discontinuous mode
CCM continuos mode
really helpful, i would recommend it to everyone that is starting, so here's the first answer... i have to understand in wich mode those chips works
tny279 ----only DCM? in all graphs there is the ringing in the dead time
ncp1014 ----DCM and CCM is mentioned on the datasheet so it switches between the 2
viper27/26 -----
i don't know help https://www.fujielectric.com/products/semiconductor/model/power_supply/technical/fly-back_transformer_design.htmlhttps://www.fujielectric.com/products/semiconductor/model/power_supply/technical/box/pdf/Fly-Back_transformer_Design_Rev_1_0_E.pdfi have found those papers from fuji electric in wich they go through the calc for the transformer, they seem very well made (i haven't read them). i wanted to know in which mode those ics works because the first step into the paper is to know the working mode.
if you have other suggestion or similar ics well, i'm all ears...probably i'm going to need help in the other phases of the desing so please help a poor student that wants to know what he's doing and not blindly copying the schematics (i could but i don't want to, PI and ST offer the online calculator with even the schematics and values). those are great tools and i'll use them as reference.the final project would be :
220vac in
sec1 5v 1A 5w
sec2 170v 50ma 8.5w -----------~15W
i have a lot of EEcores but i doubt that anything over EE22 would be needed (i have EE19 EE20 EE22 etc), something on the magnetics would be good, cause those are all salvaged cores from stanby rails of pc psu
so if you have any guide or link that you think it would help a newbie understand all this please share it
any kind of help is greatly appreciated, thanks in advance, all this was written pretty fast and english is not my native language