Easy SMPS for everyone :)

Acca

New member
Hi all,here is my very simple SMPS for all wiz:;
All details is on picture.I will show you pictures of smps working soon :)
If you have any questions ask here
PCB soon ...

Mikro uni.GIF
 

stewin

Member
wow acca real cool thanks man.
for fets like irf740 and er42 what changes are needed ??
 
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Acca

New member
You can use for example E28 with 13003 transistors for 80W small smps,powering for example soldering iron 12V like me,or similar... :)
Or you can use E19 core (without gap) and you will easy get 20W smps for powering car radios,etc. ;)
 

Acca

New member
FET version

This is version with fet.GDT is same toroid as in BDT version.Fet version can use core from RF filters as GDT.First pic is UU core winding (must remove gap between core halfs)
Freq is 50-60kHz
unnamed.jpgPTDC0025.JPGPTDC0024.JPGs.o. 1.GIF
 
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Acca

New member
Pic's

Here's waveforms in BJT schematic,and first picture is H bridge FET version.This is pctures from my friend.He winded 8turns on BDT primary instead of 4,because,as he say,it work better :)
His BDT now have 8t and 2x4t for bases.
6.jpg5.jpg4.jpg3.jpg2.jpg1.jpg
 
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Acca

New member
Voltage drop at storage inductor is about voltage at secindary multiplied by 0,9 :)
So if you set 10V at secondary on output you will get about 8V :)
And diode drop is abou 0,7 to 1V
 

vorezky04

New member
I just follow Acca.
That is the best choice how build prototype.. Easy for modification if any mistake. :adoration:

@Acca, i will increase primer BDT to 8 Turns. Can we are increase frequency to 50Khz? If can, where need modification?
 
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