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Class D Switching Power Amplifiers and Power D/A conversion

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Old 25th January 2011, 11:30 PM   #851
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Hi to all
Does anyone know substitute for optocopuler sfh610A-1, I need for overcurent protection from NMOS schematic. I found somethink like LTV817 or PC817 but pins are different (E and C of transistor). Can anyone help me out?

Thank you
Regards, Nikola
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Old 26th January 2011, 02:28 PM   #852
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Did someone make Overcurent protection and tested? Does anyone have to offer good schematic

Thank you
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Old 5th February 2011, 09:16 PM   #853
NMOS is offline NMOS  Germany
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Who is interested for PCB supplier gerber files ? email me
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Old 8th February 2011, 04:39 AM   #854
stewin is offline stewin  Kenya
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pls nmos send me a copy i am interested
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Old 13th February 2011, 02:39 AM   #855
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Which inductor do you select in mouser.cor /digikey for the amp.??
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Old 18th February 2011, 01:45 PM   #856
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Hi everyone,
Am not a fan of class d but i thought of reading through this thread to find out builders' experience.I kinda stumbled upon this:DIY 1000 Watt High End Mosfet Power Amp Circuits | Digital Technology News and Review and thought i could share with you.Maybe its already somewhere in this thread i,don't know.
Regards.
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Old 18th February 2011, 04:44 PM   #857
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Quote:
Originally Posted by electroconico View Post
Which inductor do you select in mouser.cor /digikey for the amp.??
It must be something like this. The current bear the inductor must be commensurate with the output peaks.
++++++++++++++
Comrades, here are some pictures of a couple of UCD's. The sources are 55V and 48V. Excellent sound and clean. Barely perceptible warming and controlled by a fan. This assembly is to be disposed, in order to accommodate a Rectified 85V transformer from an old Peavey's CS800 for a couple of UCD's of 400-500W output.
Click the image to open in full size. Click the image to open in full size. Click the image to open in full size.

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Last edited by tacatomon; 18th February 2011 at 04:49 PM.
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Old 18th February 2011, 07:33 PM   #858
Pafi is offline Pafi  Hungary
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Quote:
Originally Posted by xeclipse View Post
Hi everyone,
Am not a fan of class d but i thought of reading through this thread to find out builders' experience.I kinda stumbled upon this:DIY 1000 Watt High End Mosfet Power Amp Circuits | Digital Technology News and Review and thought i could share with you.Maybe its already somewhere in this thread i,don't know.
Regards.
This is exactly what the thread is about.

97% efficiency is false, and High-End is something completely different.

Last edited by Pafi; 18th February 2011 at 07:39 PM.
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Old 19th February 2011, 07:31 AM   #859
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Hey tacatamon.

I know about them , you showed them to me . ty again
I was looking for in digikey to get more options,meanwhile I'm still waiting for my pcbs

regards
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Old 19th February 2011, 02:36 PM   #860
paul14 is offline paul14  Romania
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Hi everybody.
I want to build 3 class D amplifiers to use them on subwoofers.
What schematics do you recomend? I was looking on first page and that scheme seems quite cheap. Would be suitable if I want about 200W on 4 ohms? How does it sounds...

Thanks!
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