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Class D Switching Power Amplifiers and Power D/A conversion

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Old 6th June 2008, 03:10 PM   #11
MA_AV is offline MA_AV  Israel
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Join Date: May 2008
Hi,
1.is it necessary to use a Toroidal transformer?
2.can I use regular transformer in a different box ?
box to the hypex modul + power suply, and another box to the transformer?
3. does the hypex case must be close hermetic?
or i need case with hole ?
becose i heard that digital amp must be in closed box,
4. in your opinion 300VA 42-42 to UcD will be good enough
even in adjective music ?
tanks
maor
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Old 8th June 2008, 07:31 AM   #12
TheMG is offline TheMG  Canada
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Join Date: Jan 2008
1. no, other types of transformers will work as long as they have the required voltage and power ratings

2. I assume by "regular" you mean an EI-core transformer? You can. There are advantages to going toroidal though, such as less heat and most significantly reduced weight, but there's nothing stopping you from using other kinds if it fits your design.

3. It is recommended to have some ventilation, either in the form of holes or forced air cooling (fans). Although the Class D amplifier modules are very efficient, they do have components that can heat up quite a bit in an enclosed space.

4. Yes, 300VA per module will be fine for any type of music. The only thing it won't be suitable for is pure tones or sine waves at full RMS output power, but the modules are not intended for continuous use under such conditions anyhow.
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Old 14th June 2008, 02:47 PM   #13
MA_AV is offline MA_AV  Israel
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Join Date: May 2008
Hello,
I decide in the end to build mono UcD180,
And I need your help,
I want to use Torodial transformer 300Va with 33
But I make search on the internet but I didn't find Torodial transformer that will match.
I also search in http://www.antekinc.com/
Maybe I miss something?
I add pictue of the transformer that i need from the hypex site
in the pic writte 42vac but to 180 is 33vac
Can u please put a link to site that I can buy the transformer
Best regards
maor
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Old 15th June 2008, 06:47 AM   #14
MA_AV is offline MA_AV  Israel
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Join Date: May 2008
Default Anyone ?

Anyone ??
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Old 15th June 2008, 08:49 PM   #15
Javin5 is offline Javin5  Switzerland
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Join Date: Mar 2006
Location: Switzerland
You can order a suitable transformer for the UcD180 directly from Hypex. I did that and I'm happy with it. I'm not sure why you are looking elsewhere. To save some money? Or did I miss something here?
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Old 16th June 2008, 11:31 AM   #16
MA_AV is offline MA_AV  Israel
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Join Date: May 2008
Javin5 hi,
in the hypex site the sales only TR180 160VA
I need 300VA.
but if u see the the TR180 has 12 cable.
4 in the incomming 230vac(black,white,blue and brown)
in the outside there is 7 cable (Grey,volet and Grey 13-0-13)
RED, RED 30-0
and Yellow,yellow 30-0
and Green/Yellow for Earth Screening
I need 300VA like the 180TR(160VA)
can some one help me with this
tanks
maor
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File Type: gif tr180.gif (11.9 KB, 656 views)
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Old 16th June 2008, 11:01 PM   #17
TheMG is offline TheMG  Canada
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Join Date: Jan 2008
For UCD400 mono what you need is the TR400 from Hypex. If you want to built a stereo amplifier (two UCD400s) then get the TR501A also from Hypex.
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