-/+ 50 v SMPS

[mahmood]

Hi boys :
this is my first switch mode power supply . i want to share
it for you .

 

[mahmood]

continue

my smps

 

[mahmood]

continue1

my smps 2

 

[mahmood]

continue 2

bottom layer

 

[guitar_joe]

looks alright
how does it perform?

 

[mahmood]

hi

like this

 

[mahmood]

hi all

schematic

 

[mahmood]

follow project

the both side is here .

 

[mahmood]

main pcb file

hi all
if you want main pcb file first download the pad2pad from
pad2pad.com and second Email me to send it for you . cause
i can't share it here . it is about 500kByte .
note pad2pad is free software and is about 6MByte .😀 😀 😀 😀

 

[S.G. Mahbub]

Good effort. Keep it up.
Next time try to avoid linear transformer in smps circuit.
Feed back process is good.
Thanks.

 

[ravslanka]

hi mahmood

what is its power rating and can irfp450 be usedin place of 460

 

[annex666]

I would suggest removing the linear PSU section for the controller - instead it may be better to have an inefficient regulator from the full-rail DC line (rectified mains) which is switched out once the output has stabilized (handed over to a regulated supply derived from the output - i.e. an additional winding).

This should up the overall efficiency once the output has stabilized. 😀

 

[sawreyrw]

S.G. Mahbub,

What's wrong with the low voltage bias supply? Do you have a better solution that is more cost ($, space, weight, reliable) effective.

Rick

 

[annex666]

S.G. Mahbub,

What's wrong with the low voltage bias supply? Do you have a better solution that is more cost ($, space, weight, reliable) effective.

Rick

See my above answer (posted a few moments before yours) 😉

 

[sawreyrw]

annex666,

Good idea, but how well will it regulate? Do you need a series regulator in this case as well?

Let's see what S.G. Mahbub has to say. 🙂

Rick

 

[annex666]

Given the output is fixed, there should be minimal need to regulate the controller supply - maybe a low-dropout linear regulator, or even an LC filter will suffice. The controller is a low current device and probably doesn't have highly critical voltage supply requirements - I would check the datasheet and see what its requirements are, then judge what to do based on that.

 

[luka]

annex666,

Good idea, but how well will it regulate? Do you need a series regulator in this case as well?

Let's see what S.G. Mahbub has to say. 🙂

Rick

I have used 7812

 

[LuigiDJ]

Hello to all
Can this design be modified to work on 120Vac? My mains supply is 120 volts, and this smps is what I was looking for.
I have 3 etd59 cores, and want to make 2 active PA speakers, they will need 120volts ac on mains and +/- 65 or 70 volts dc, I'll need to change the turns ratio and the feedback network.
Any help on this?
Thanks

 

[Samuel Jayaraj]

What is its output current capability? How good is the line and load regulation?

Just the ticket for portable active PA speakers!!

Thanks for sharing.

 

[wine&dine]

Can this design be modified to work on 120Vac?

Easy, just use the voltage doubler trick you can find in any PC SMPS that has a 115/230V switch. I just clipped this out of the next best Google result: