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Old 10th July 2007, 08:47 PM   #51
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Hi Hugo

Iīm new here. I have various projects. Itīs builded from old equipments from trash. I donīt have money to buy new components. The projects are simple and no need discussion around it.

Thank you very much
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Old 10th July 2007, 08:51 PM   #52
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Originally posted by CHACALPOWERS
Itīs builded from old equipments from trash.
That's the spirit.

Also, keep in mind many here LOVE good discussions.

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Old 10th July 2007, 08:58 PM   #53
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Mr. Hugo

Thanks by your comments.
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Old 4th January 2013, 08:44 PM   #54
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Default Toroid Data for Car SMPS

Originally Posted by himanshuraval View Post
any body have full design of TL494 based car smps with toroid data
Hi Himanshuruval. Personally I would recommend you use the ETD39 with Ferroxcube 3C90 core halves or similar material. This is suitable for building car amplifiers which deliver around 350W RMS total continuous power. If you need more power than this you can try the next bigger core which is the ETD44 core with the suitable 3c90 core halves. The power you can get out of any particular core is dependent on frequency. Running the cores at around 100KHz is not a bad start.
About 4 turns on the primary will be sufficient for most cases. The number of secondary turns will of course depend on the output voltage(s) which you require.

If you must use a toroid then you can use something like the Ferroxcube TX42/26/13-3C90 or something similar.
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Old 5th January 2013, 02:45 AM   #55
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Default Suitable Transformer Cores

A couple more choices to consider if you want to use a toroid are either the Amidon FT-140-77, or FT-240-77. The '140 has about 350W throughput capacity @ 100kHz, and the '240 can throughput about 1.7kW @ same freq. Both are made of #77 Ferrite material, which is great for SMPSs. The FT-140-77 is 1.40" O.D. and the FT-240-77 is 2.40" O.D. Primary turns for either core should be about the same: 4 + 4, but you will want to verify this through a good design regimen.

Hope this helps,

-. ---.. -..- ---

Last edited by N-Channel; 5th January 2013 at 02:47 AM. Reason: Typos & grammar errors
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