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Thread: My new Class-D Amplifier 1250W @ 8R, 2500W @ 4R

  1. #1

    My new Class-D Amplifier 1250W @ 8R, 2500W @ 4R

    Hello.


    Just showing a quick video of my new class-d amplifier delivering good amount of power, from a small sized module.

    This is a self oscillating class-d amplifier, not using IRS2092.

    This amplifier can run from any voltage range +-50VDC up to +-100VDC without any modifications.

    Can run without ANY problems from an unregulated power supply, the test in the video was performed using an UNREGULATED SMPS 1200W.

    Output current also shown on the Clamp Meter.

    So, again showing true results.

    Still have to implement the output short circuit, and it will work in LIMIT mode, not shutting down the amplifier, so (sound all the time).


    Last edited by MicrosiM; 09-11-2015 at 12:02 PM.
    www.diysmps.com & www.Micro-Audio.com

  2. #2
    hello sir nice vedeo.

  3. #3
    too much power

  4. #4
    diysmps Senior Member
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    nice work what are the output fets??

  5. #5
    Quote Originally Posted by stewin View Post
    nice work what are the output fets??

    IRFP4227 or IRFP260 will do the job.

    Thanks!
    www.diysmps.com & www.Micro-Audio.com

  6. #6
    diysmps Senior Member
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    hi sir i have a few pcs of irfs4227 around can a single pair work in ucd +/-95vlts 2ohms , 250khz

  7. #7
    Quote Originally Posted by stewin View Post
    hi sir i have a few pcs of irfs4227 around can a single pair work in ucd +/-95vlts 2ohms , 250khz

    Single pair can work at 2 Ohms with proper gate drive circuit
    www.diysmps.com & www.Micro-Audio.com

  8. #8
    diysmps Senior Member
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    Quote Originally Posted by MicrosiM View Post
    Single pair can work at 2 Ohms with proper gate drive circuit

    like ir2110 with ucd classd ??

  9. #9
    Quote Originally Posted by stewin View Post
    like ir2110 with ucd classd ??

    Yes, also IRS2092 with some modifications at the output can drive 2 Ohms Load.

    But to tell you the truth, I don't like to run any amplifier with 2OHMs load, that low load will stress the output devices, from my experience into the audio, I prefer to run 4 OHMs per channel.

    The only amplifier I ran at 2 OHMs was the CROWN MA-5000VZ, cos it was designed for that purpose.

    However, My amplifier was designed to run at 8 or 4 Ohms only, I have no interest to run at 2 Ohms, I see no point into running it at 2 Ohms. even if the power will be what so ever.

    My amplifier is capable to deliver high power at High impedance, and that's a key into my amplifier, the key is not to run at @ 2 Ohms like others.

    So I still believe that 1250@ 8 Ohms is something perfect!

    Regards
    www.diysmps.com & www.Micro-Audio.com

  10. #10
    diysmps Senior Member
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    great , will you make an option of running it at full bridge at +/-95v?
    Last edited by stewin; 09-29-2015 at 06:52 PM.

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