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Old 18th July 2012, 06:09 PM   #51
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Hello Hadi,
just for reference, you can check out
Switchmode Power Supply For Car Audio,
it is a good starting point for DIY car SMPS, well explained...
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Old 22nd July 2012, 05:09 AM   #52
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Quote:
Originally Posted by mikilele View Post
Hello Hadi,
just for reference, you can check out
Switchmode Power Supply For Car Audio,
it is a good starting point for DIY car SMPS, well explained...
thanks
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Old 22nd July 2012, 01:28 PM   #53
chas1 is offline chas1  Dominican Republic
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The construction of the transformer is very important, if using an ETD type core set the primary current might require you to gap the core if not it will saturate quickly and result in the mosfet's overheating and fail.The rest of the design is a straight forward DC-DC converter design.
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Old 22nd July 2012, 04:27 PM   #54
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Quote:
Originally Posted by chas1 View Post
The construction of the transformer is very important, if using an ETD type core set the primary current might require you to gap the core if not it will saturate quickly and result in the mosfet's overheating and fail.The rest of the design is a straight forward DC-DC converter design.
Hypex are using the Gapped Core trick
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Old 29th July 2012, 09:16 AM   #55
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SMPS designers refer to this topology as a "dc transformer". its NOT a buck-derived converter, which is why there is no output inductor. startup is an absolute nightmare for this topology, but it does have the advantage of operating open-loop. there is a reason why buck derived converters have an inductor....

If one winds a really good transformer, has a top-notch layout (hint: this one isnt, but its a lot better than some of the commercial versions I've seen) and wicked low ESR output caps, the topologies inherent problems get much worse. I think the real advantage of this topology is that it works better when done badly. high leakage winding, planty of loop inductance in the secondary layout and a soft-start on the primary will give a circuit that actually works.
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Old 8th August 2012, 01:42 AM   #56
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verry good!!
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Old 14th September 2012, 03:16 PM   #57
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any plans of showing the final schematic and protection?
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Old 28th September 2012, 03:29 AM   #58
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Originally Posted by clocktower View Post
any plans of showing the final schematic and protection?
?
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Old 29th October 2012, 02:00 PM   #59
sonsom is offline sonsom  India
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Hi

For 220V input AC can I modify input turns to 22-0-22 without any other modifications. This is a very nice design which I was looking for a long time.
Kindly help.

Sony Soman
New Delhi
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Old 29th January 2013, 04:51 AM   #60
billu is offline billu  India
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hi..how the regulation work..dont c any feed back ..any short circuit protection
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