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Old 17th August 2011, 07:11 AM   #71
radio is offline radio  Macedonia
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Quote:
Originally Posted by luka View Post
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

Last edited by radio; 17th August 2011 at 07:21 AM.
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Old 17th August 2011, 07:44 AM   #72
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Quote:
Originally Posted by radio View Post
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.
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Old 17th August 2011, 08:47 AM   #73
radio is offline radio  Macedonia
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Originally Posted by jash2008 View Post
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 !!

Last edited by radio; 17th August 2011 at 09:16 AM.
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Old 17th August 2011, 08:59 AM   #74
luka is offline luka  Slovenia
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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
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Old 17th August 2011, 09:11 AM   #75
radio is offline radio  Macedonia
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[QUOTE=luka;2675324]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!
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Old 26th January 2012, 07:53 PM   #76
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Hi, can i use a simple atx ferrite core?
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Old 26th January 2012, 09:06 PM   #77
luka is offline luka  Slovenia
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yes, but keep the same number of primary turns
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Old 27th January 2012, 05:07 PM   #78
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thanks luka
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Old 13th May 2012, 07:24 AM   #79
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Hello,

Does someone already used this smps for several months? It's a good power supply ?
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Old 13th May 2012, 09:44 AM   #80
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Default Using Bootstrap Start-Up saves one transformer

Quote:
Originally Posted by S.G. Mahbub View Post
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.
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Last edited by KatieandDad; 13th May 2012 at 09:53 AM.
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