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Class D Switching Power Amplifiers and Power D/A conversion

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Old 23rd January 2013, 10:34 PM   #271
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Originally Posted by apexaudio View Post
Voltage for driver suply +15V up to -HT can be realised with this simple circuit.
Hi
Could you send me the files of this amplifier?
I need to put together a good class D amplifier for use in my sound system PA
Thank you.
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Old 23rd January 2013, 11:00 PM   #272
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Originally Posted by apexaudio View Post
D200 can be use with 2 ohms load without any changes, just 0.05R in O/C detect circuit, and this is full range hi-fi amp work on 450kHz, for more power increase input level with preamp.
Nice work, can you upload video on yutube?
Regards
Hi
Could I send files from your amplifier D200 so I can build one?
I need to put together a good class D amplifier for use in my PA sound system.
Thank you.
luizcpimenta@yahoo.com.br
luizcpimenta@gmail.com
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Old 23rd January 2013, 11:40 PM   #273
Nagark is offline Nagark  Brazil
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Originally Posted by IRSound View Post
Class-D IRSound D200-V.0 Based On Apex D200 - a little music+ temperature test :

Class-D IRSound D200-V.0 Based On Apex D200 - a little music+ temperature test - YouTube

so , as i mentioned before , my amp have temperature problem
in this video , i used 48uH (5x0.5mm wire) on two stacked CSC CK270060 , the core was warm about 30~40 °C in all tests.
the loudspeaker is a 16 Ohm full-range paralleled with a 8 ohm Electric resistance wire. mosfets get hot during this test as you can see up to 50 °C.

please help me...why mosfets gets hot

Regards,
IRSound

OMFG 500C
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Old 24th January 2013, 09:07 PM   #274
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D200 made by Zarko Petkovski
Apex D200 - YouTube
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Old 25th January 2013, 01:49 PM   #275
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Hi Mile,

Could you please upload the circuit on your D200 aplifier.

BR,
Lyubo
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Old 25th January 2013, 11:57 PM   #276
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Originally Posted by Nagark View Post
OMFG 500C
Boa noite.
Qual amplificador você montou?
Abraço.
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Old 26th January 2013, 01:55 AM   #277
Nagark is offline Nagark  Brazil
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Originally Posted by luizcpimenta View Post
Boa noite.
Qual amplificador você montou?
Abraço.
Apenas fiz um comentario sobre a temperatura que o amplificador atingiu mas como assisti o video em baixa qualidade nao vi a virgula da casa decimal e pensei que fosse 550 C° desculpas

Quote:
Just made ​​a comment about the temperature reached the amplifier but as I watched the video in low quality not seen the comma decimal point and thought it was 550 ° C excuses

Last edited by wintermute; 26th January 2013 at 02:00 AM. Reason: added english translation
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Old 26th January 2013, 02:02 AM   #278
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diyaudio is an english speaking forum. If you post in another language please also post an english translation.

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Old 26th January 2013, 09:29 AM   #279
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Temperature was 55 deg on mosfets without heatsink.
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Old 26th January 2013, 11:46 AM   #280
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Temperature was 55 deg on mosfets without heatsink.
woking in full power ??
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