Uni SMPS

Acca

Member
2011-11-21 9:22 am
There's my universal smps from parts from pc power supply.If it don't start to oscillate,reverse feedback windings (15k resistor).I'll test it on some amps,and it works great.PCB is without rectifier,I'll finish it later.
 

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  • PTDC0048s.JPG
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  • uni smps a.pdf
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  • uni smps b.pdf
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Elvee

Member
2006-09-08 2:04 pm
Resistors or reverse connected diodes seem to be missing between B and E of the transistors (unless they are integral to the components used).

Without them, the charge on the coupling caps cannot be reset, and the converter will only be able to provide a small output.