As you mentioned my friend, I have been confused a little about the maximum power rating that flyback topology can support. another spec that should notice is the universal AC main input. would you please explain more or introduce a good document about this topology and its designing method?2 x interleaved flybacks is the lowest cost, with good dynamic performance - and can be made high efficiency with valley switching turn on and controlled mosfets in the output.
thanks my friend for your consideration. the main input is (90-240) Vac. I don't want to buy and I want to do a real project for myself to promote my design skill in SMPS cause my major is Electrical electronic engineering. i will appreciate your assistance.90 - 240Vac, or 85 - 275 Vac, really these important points should be in the 1st post - my company is designing just such a beastie for production very soon ....
I don't want to buy and I want to do a real project for myself to promote my design skill in SMPS cause my major is Electrical electronic engineering. i will appreciate your assistance.Yes Easy Peasy can make you one as good as you could get (in fact better), than anywhere else in the world, but are you doing some hands on hobby work, or you want to buy?
...So anyway, you need to have a PFC stage......then the PSU below that....unless you have a rough spec and can just do two interleaved isolated PFC'd flybacks feeding into the same isolated output....its up to you.....if your output can manage the slow feedback loop of a pfc, or do you need the faster response of a fast PSU after the PFC stage?
thanks a lot for the courses that were uploaded.Here is the free SMPS course.
SMPS course_Big folders
SMPS course_little folders
Or, if you want, Power integrations can do that design for you with a 2 transistor forward or LLC converter.....they may design it for you with their software....i bet if you wrtie to their forum, they probably have such a design for you, if you want.
Attached is a 2TF in LTspice which you can adjust to your spec if you want.
You say your load is "inductive"...is it a Motor? What is the load?
Youll need a PFC, so you could just pick a simple BCM PFC if you want...giv eyourself a 390v or so output...to feed to the 2TF..or dual flyback, whatever you choose......there is a fairchild chip which controls dual isolated flybacks in BCM if you want. (boundary conduction mode)