1.2kW SMPS from junk parts,low cost

[Acca]

Hello,here's my 1.2kW SMPS built from junk parts.It's really simple and good.
SMPS is in fullbridge,uses 4 same switching transistors,you can use 13007,13009,2sc2526,BUxxx,BUTxx,BUVxx,and more....
This is self osc. SMPS
For power transformer you can use two EE33 in series,one ETD49,or other core which you have.
With this smps I power two 500W amps,and work wery good.
Other power can be achieved,only change transistors.
BDT's is from CFL lamp (or electronic halogen transformer),small toroid core.
I'll attach half bridge version,which have 500W(dependent on transistors and output transformer).
Here's schematic and pcb:


View attachment HB i H ee33.pdf View attachment HB i H 2.pdf View attachment HB i H.pdf
One pcb is for flyback transformer core,and other for two EE33 or EI33 (or EE/EI28).
Peaks on Ube is for turn on and off

 

[stewin]

hi acca . nice work pls post photos of your cmpleted project.

 

[Acca]

I work this in 3D
I only have pictures of HB,my camera was dead today,but I'll make H late (no pictures)

 

[MicrosiM]

nice work Acca :UP:

 

[Acca]

Thank you

 

[Acca]

You must have loosen coupling (wind secondary after primary,or primary after primary for this) because not have storage inductor

 

[Acca]

Camera repaired,here's pictures of fullbridge:

 

[tsitouh]

Hello,here's my 1.2kW SMPS built from junk parts.It's really simple and good.
SMPS is in fullbridge,uses 4 same switching transistors,you can use 13007,13009,2sc2526,BUxxx,BUTxx,BUVxx,and more....
This is self osc. SMPS
For power transformer you can use two EE33 in series,one ETD49,or other core which you have.
With this smps I power two 500W amps,and work wery good.
Other power can be achieved,only change transistors.
BDT's is from CFL lamp (or electronic halogen transformer),small toroid core.
I'll attach half bridge version,which have 500W(dependent on transistors and output transformer).
Here's schematic and pcb:
View attachment 4143 View attachment 4153 View attachment 4152View attachment 4148 View attachment 4147 View attachment 4146View attachment 4145 View attachment 4144 View attachment 4154

View attachment 4151 View attachment 4150 View attachment 4149
One pcb is for flyback transformer core,and other for two EE33 or EI33 (or EE/EI28).
Peaks on Ube is for turn on and off

Hello Acca, I don't understand how the BDt are connected to the board, could you help please ?