I'd like to try this smps for my class D power amp, just some questions about the transformer....
Microsim wrote :
TRANSFORMER ETD49 UNGAP
Npri=16x2 turn 0.4x5wire
Nmain sec =11turn X 4 0.4X6wire
(1/2 Primary) 16 Turns * ALL SECONDARY * 16 Turns (1/2 Primary)
2 layers at least mylar tape between PRIMARY AND SECONDARY.
I'm not sure if I understand right the connections... I mean, primary 16 windings before the secondary and other 16 after the secondary, these windings are made with 5 litz wire but the 0.4 is the diameter or the square section?
Another question about the secondary, I see 11 turn x 4 ,these 4 windings how are connected? 11 with other 11 in parallel each rail or 11 + 11 in series each rail?
In attachment I show you the preview of my almost ready class D power amp.
Thanks in advance for replayView attachment 356
View attachment 357
microsim im in, i have all the parts, . i can build this smps for diysmps users sharing ideas, i only have one problem which my pcb design is not perfect , but im willing to offer myself to build this one. and i`ll follow this thread
Now this looks really nice idea, i said eariler in other thread about 1 good working design of smps for us DIY
i can support if needed, I am IN
Here are ALL original design files
Schematic was drawn long time, and it looks not organized.
PCB is well designed.
You can make same one or Make your own.
That PCB uses ER93 Transformer, NOT ETD49
If you need ETD49, you have to modify the PCB, or copy that Layout, 1 day Job!
If you still have questions, please let me know
Let us see the results!
Will send you one more file