12 V 30 A
hi
this is the pcb layout of my newly project in two part .
1st main board is power section & 2sd is PWM section
of course i used a few SMD components in PWM pcb
EDT 44
pri 36 [turn]
sec 4 [turn] " center tab "
pri wire size : 4*26 (AWG)
sec wire size : 33*26(AWG)
part one bottom side :
hi
this is the pcb layout of my newly project in two part .
1st main board is power section & 2sd is PWM section
of course i used a few SMD components in PWM pcb
EDT 44
pri 36 [turn]
sec 4 [turn] " center tab "
pri wire size : 4*26 (AWG)
sec wire size : 33*26(AWG)
part one bottom side :
Dear mahmood,
I would like to build your smps(230V>+/-50V,SG3525,IR2110). Please send to me the pcb files, Thank you!
nincsmar@gmail.com
I would like to build your smps(230V>+/-50V,SG3525,IR2110). Please send to me the pcb files, Thank you!
nincsmar@gmail.com
Current Ratings.
Hi Mahmoud.
Just one question after this long discussion,
Is this power supply stable for long time operation?
have you loaded it with fixed loads for 1 hour? to draw 6 amps? 4 amps?
what is the current rating for it?
It can deliver +/-50V 6 Amp continues?
can you give more info about the transformer winding?
What is the meaning of 4 Turn center tap (33*0.4)
Thanks...
(33*0.4)
Hi Mahmoud.
Just one question after this long discussion,
Is this power supply stable for long time operation?
have you loaded it with fixed loads for 1 hour? to draw 6 amps? 4 amps?
what is the current rating for it?
It can deliver +/-50V 6 Amp continues?
can you give more info about the transformer winding?
What is the meaning of 4 Turn center tap (33*0.4)
Thanks...
(33*0.4)
Hi,
This is a fascinating design and I built it using my own layout. I would like to share it with others DIYers. I modified it for different voltages.
The design works perfect with around 500W constant load with little rise in mosfet temperature.
Controller board is same for both designs
Last edited:
#Turns? Primary 25T 1X18#, Sec 14T 2X20# for +/- 75V~
Etdxx? EE42/42/20
tl494? or sg3525? SG 3525 + IR2110
Thanks
Hi everybody,
I am not much expertise with SMPS. I have few questions:
1. Transformer data: 25T Primary, 14 T secondary on EE/42/42/20 core.
2. Zener used 62V between 0V & + secondary voltage.
3. rest is same as mahmood schematic.
Now according to mahmoods revised schematic, the volts per turn comes to be 4.666 ( 42/9T). So the 14T in secondary should give ~65V and therefore I put 62V zener.
But my SMPS is giving +/- 78volts and this drops to Around 76 volts on connecting a 1000W halogen. Thus the SMPS is regulating the load.
Why this is happening. I think the volts per turn is incorrectly mentioned as +/-42 in place of +/-50 in the revised schematic. because if we consider 50 volts out from 9 turns, we get 5.555 volts per turn (50/9T) and this gives 78 volts for 14T.
Even if we consider 5.55 V/T, second question: why the SMPS is regulating 78 volts when the zener is 62 Volts.
Please correct If I am wrong anywhere .
Eva, could you please throw some light?
Thanks
I am not much expertise with SMPS. I have few questions:
1. Transformer data: 25T Primary, 14 T secondary on EE/42/42/20 core.
2. Zener used 62V between 0V & + secondary voltage.
3. rest is same as mahmood schematic.
Now according to mahmoods revised schematic, the volts per turn comes to be 4.666 ( 42/9T). So the 14T in secondary should give ~65V and therefore I put 62V zener.
But my SMPS is giving +/- 78volts and this drops to Around 76 volts on connecting a 1000W halogen. Thus the SMPS is regulating the load.
Why this is happening. I think the volts per turn is incorrectly mentioned as +/-42 in place of +/-50 in the revised schematic. because if we consider 50 volts out from 9 turns, we get 5.555 volts per turn (50/9T) and this gives 78 volts for 14T.
Even if we consider 5.55 V/T, second question: why the SMPS is regulating 78 volts when the zener is 62 Volts.
Please correct If I am wrong anywhere .
Eva, could you please throw some light?
Thanks
Last edited:
yes and it is quite stable.
the only problem is that you can't use it to paralel mosfets because it can drive max 2A.
best regards,
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