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Class D Switching Power Amplifiers and Power D/A conversion

ucd 25 watts to 1200 watts using 2 mosfets
ucd 25 watts to 1200 watts using 2 mosfets
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Old 3rd February 2013, 10:24 AM   #3301
andrewlebon is offline andrewlebon  India
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Hello
greetings many diyers having problems with RIGHT SELECTION of cores please go
to detex audio site anyone can clearly see the core used along with core no personally
i have tried with orignal cores detex audio is using there is a difference detex audio MUST
have tested many cores before using the cores he is using in his amps
warm regards
andrew lebon
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Old 3rd February 2013, 11:44 AM   #3302
akraj is offline akraj  Bangladesh
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Quote:
Originally Posted by luka View Post
YES -2 MATERIAL IS GOOD
Thanks Luka.
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Old 5th February 2013, 12:59 AM   #3303
hirasound is offline hirasound
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Default IR SOUND Have knows please tell me why there is the same problem

Quote:
Originally Posted by IRSound View Post
Hi guys..

so I've just finished IRS1500..but there is also a problem

please watch this video :

Class-D IRSD1K5 - No & Low Level input Problem - YouTube

when i turn on power supply..after s short delay , speaker connected to amp's out. as you can hear in video , there is a noise available at output. (input volume = 0) and when i increase volume up to 4~5%, a really bad audio signal become appear. also the active led indicator isn't bright constantly.
when i increase the volume (about 7~8 %) the amp start to oscillate and those problem solved.

guys please help me. anyone have similar problems ?

Regards,
IRSound
Have knows please tell me why there is the same problem
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Old 5th February 2013, 01:08 AM   #3304
hirasound is offline hirasound
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How many output coil for IRS 3000 uh? Please know how many ohms resistance to the door also ırfp4227 regards
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Old 5th February 2013, 11:02 AM   #3305
kirubakaran is offline kirubakaran  India
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Default hi, Andrew

greetings,

detex announced new Class d Amp dpa 6000i/8000i are released soon and it can drive 8000 watts RMS. so any idea to design 8000w class d amp or you guess to any combination of gate driver, mosfet or Igbt.

thanks
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Old 5th February 2013, 11:06 AM   #3306
kirubakaran is offline kirubakaran  India
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Location: chennai
my guess is ir21864 is a 4 amp gate driver so it will drive 4 pair of irfp90n20 and it produce 6000 watts then what u think about this.
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Old 5th February 2013, 11:28 AM   #3307
andrewlebon is offline andrewlebon  India
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Default hello

hi, Andrew
greetings,

detex announced new Class d Amp dpa 6000i/8000i are released soon and it can drive 8000 watts RMS. so any idea to design 8000w class d amp or you guess to any combination of gate driver, mosfet or Igbt.

thanks
Hi Kirubakaran
greetings insane power has any one tried detex amps at 125+/-
RAILS i dont think so most diyers would find it hard to reach 170 volt dc rails
plus the expensive mosfets and the speakers and the POWER SUPPLY transformer better to make irs3000
warm regards
andrew lebon
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Old 9th February 2013, 01:51 PM   #3308
andrewlebon is offline andrewlebon  India
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Default small test

amp at 110 dc volts+/-
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File Type: jpg IMG_0260.jpg (928.4 KB, 1564 views)
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Old 9th February 2013, 02:01 PM   #3309
akraj is offline akraj  Bangladesh
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Quote:
Originally Posted by andrewlebon View Post
amp at 110 dc volts+/-
Hi Andrew:

Are you going to share this design with us?

Thanks in advance.

Oh one more thing, can you please let me know where I can find T157-2 or T 106-2 in Calcutta? Address?

Raj
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Old 9th February 2013, 04:38 PM   #3310
andrewlebon is offline andrewlebon  India
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Hi Akraj
greetings same design as posted in forum to make a proper d class amp FIRST get
a proper core then attempt to make a d class amp all yours problems will be solved
warm regards
andrew lebon
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