Class D Amp with LM566,LM393 and 2XIRF530 - Page 39 - diyAudio
 Class D Amp with LM566,LM393 and 2XIRF530
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 Class D Switching Power Amplifiers and Power D/A conversion

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diyAudio Member

Join Date: Feb 2010
Location: Serbia
Quote:
 Originally Posted by suryadi5417 just for testing i'm using 42v dc.
It's over 100W at 4R load with +/-42V DC.

diyAudio Member

Join Date: Feb 2013
Quote:
 Originally Posted by suryadi5417 my caps 0,47uF and 0,22uF with no brand, i think from china. Regards
Ok Thanks

diyAudio Member

Join Date: Aug 2010
Location: jakarta
Quote:
 Originally Posted by apexaudio It's over 100W at 4R load with +/-42V DC.
Alright sir ,i will down the voltage for the test. To get 400 watts at 4 ohms, what is needed? how many volts and how many watts transformer should I give this amplifier?

Regards.

 23rd February 2013, 11:53 PM #384 diyAudio Member   Join Date: Feb 2013 I want to supplied my amp about 2*40v. So with 2*30v transfo it's ok (30*1.414=42.5v)(42.5-2.4=40v) 2.4 is the loss in the diode bridge. But I have a problem to select the power of the transfo ! I think 200W it's ok because the amp can "give" 100W+ the heat loss (30w)+the loss in transfo(40w)=170w (30w of margin). What do you think ?
diyAudio Member

Join Date: Feb 2010
Location: Serbia
Quote:
 Originally Posted by krakow I want to supplied my amp about 2*40v. So with 2*30v transfo it's ok (30*1.414=42.5v)(42.5-2.4=40v) 2.4 is the loss in the diode bridge. But I have a problem to select the power of the transfo ! I think 200W it's ok because the amp can "give" 100W+ the heat loss (30w)+the loss in transfo(40w)=170w (30w of margin). What do you think ?
Heat loss must be under 10W, but 200W is ok.

 25th February 2013, 10:23 AM #386 diyAudio Member   Join Date: Feb 2013 Ok, thanks Regards
 26th February 2013, 08:35 PM #387 diyAudio Member   Join Date: Dec 2012 Location: Bucuresti for apex d200 what trafo and what transistors for 500-700w
diyAudio Member

Join Date: Feb 2010
Location: Serbia
Quote:
 Originally Posted by PetruV for apex d200 what trafo and what transistors for 500-700w
D200 is 200W amplifier.

diyAudio Member

Join Date: Dec 2012
Location: Bucuresti
Quote:
 Originally Posted by apexaudio D200 is 200W amplifier.
I seen the d500 but its too complex i want something like d200 but 500-700w

diyAudio Member

Join Date: Feb 2013
Quote:
 Originally Posted by PetruV I seen the d500 but its too complex i want something like d200 but 500-700w
The D200 was designing for 200W, if you want 500W you must remake all the design.
And 500W is a very high power, it must have many security control.
The D500 is not so complex in front of D200 and it was design for 500W !

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