-/+ 50 v SMPS

[martincartagenero]

this smps is design for verysel arslam.

 

[parcare234]

hi guys...can i put instead of etd59 3 ei33 or more?...if yes...what power can i get with those?

 

[luka]

well yes, I guess you can, if each transformer can be made to work with your specs.
the power would be in the area of power of one core times how many core you would have

 

[parcare234]

ok..thanks....i will try it next week and i will tell you how it works

all the best!

 

[gxhcdba]

hi looke at very good ,what's the transformer?

 

[Leon08]

Very interesting project. I would like to build this power supply too.However I feel it need to be explained a bit more in detail especialy how to wind the transformer.
This is the most complicated and crucial part of this supply.

 

[radio]

2x35V/5A SMPS supply !?

Hi all !
Very interesting topic, so please help me!?
I need a SMPS supply 2x35V/5A (project) for the audio amplifier with TDA7294/4om.
Give the suggestion that the power to choose!
thanks and cheers !!

 

[jash2008]

Hi all !
Very interesting topic, so please help me!?
I need a SMPS supply 2x35V/5A (project) for the audio amplifier with TDA7294/4om.
Give the suggestion that the power to choose!
thanks and cheers !!

may be you can try this, it works great. I have modified this design for +-70 and tested on a 400watts amp whihout much heating. You may be required to decrease the no. turns and gauge according to your requirement

thanks

 

[radio]

may be you can try this, it works great. I have modified this design for +-70 and tested on a 400watts amp whihout much heating. You may be required to decrease the no. turns and gauge according to your requirement

thanks

Why modified this design for + /-70V, i need + /-35V for an amplifier with TDA7294!?
Question: Does this can be fed to drive amplifier with TDA7294?
thanks

 

[luka]

Why modified this design for + /-70V, i need + /-35V for an amplifier with TDA7294!?
Question: Does this can be fed to drive amplifier with TDA7294?
thanks

and why not? just goes to show how much you understand this, and why you should not do it, it can kill you... I think you would be better off, with buying already made one

 

[radio]

and why not? just goes to show how much you understand this, and why you should not do it, it can kill you... I think you would be better off, with buying already made one

Greetings from Slovenia!
SMPS should be submitted well-known amplifier with TDA7294 (stereo 2x100W/4om!?), No problem!
thanks and cheers !!
Please, if you are able to give this to the English or the Serbien or Croation language!?
Best regards and move on!
P.S.
http://www.cyfronika.com.pl/kityavt2/avt2732pdf.pdf

 

[jash2008]

Why modified this design for + /-70V, i need + /-35V for an amplifier with TDA7294!?
Question: Does this can be fed to drive amplifier with TDA7294?
thanks

so, that means you need a readymade one with all calculations already done, right?

further, do you require a 220vac to +-35v or 12vdc to +-35v.

 

[radio]

so, that means you need a readymade one with all calculations already done, right?

further, do you require a 220vac to +-35v or 12vdc to +-35v.

It takes mixing 220....230Vac/2x35Vdc SMPS with Stereo Hi-Fi Amplifier with TDA7294/4om!
thanks and cheers !!

 

[luka]

let me explain what I wanted to say:
all it takes, bare minimum to do is, to change feedback resistors on SAME design. Now I know of several here that can be used and change to any specs you want, including my own

 

[radio]

let me explain what I wanted to say:

Hi Lord
Give your scheme (specify)?
For 220VAC ... 240VAC SMPS 2x35Vdc for stereo Hi-Fi amplifier with TDA7294/4om?!
thanks and cheers!

 

[necrofago]

Hi, can i use a simple atx ferrite core?

 

[luka]

yes, but keep the same number of primary turns

 

[necrofago]

thanks luka

 

[djbneben]

Hello,

Does someone already used this smps for several months? It's a good power supply ?

 

[KatieandDad]

Using Bootstrap Start-Up saves one transformer

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

SMPS supplies often used to employ a large power resistor and a zener to provide the (eg 12V) for the electronics during start-up. Once the PSU was running, the 12V was supplied by an auxilliary winding on the output transformer. As the resistor only had to provide power for a few cycles it never really got hot.