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Class D Switching Power Amplifiers and Power D/A conversion

Amplifier module on driver SI2833
Amplifier module on driver SI2833
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Old 11th September 2019, 09:58 PM   #11
Sous is offline Sous  Ukraine
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Old 12th September 2019, 08:23 PM   #12
rafsky is offline rafsky  Italy
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Very nice work, congratulation!
Are they commercial or for OEM?
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Old 13th September 2019, 08:15 AM   #13
Sous is offline Sous  Ukraine
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Thank!
will be commercial after testing.
At the moment, experiments with galium nitride have not shown better results than silicon transistors.

Nevertheless, the board works fine with IRFB4227. The distortion level is about 0.002% to 1/2 of maximum power and maximum power of 500W RMS.



A little later I will show detailed results
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Old 14th September 2019, 08:58 AM   #14
Sous is offline Sous  Ukraine
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the amplifier on GAN transistors work! Distortion up to 100W (power supply +/- 53V) is about 0.001%.
Ahead of tests at +/- 80V
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Old 14th January 2020, 09:14 PM   #15
Sous is offline Sous  Ukraine
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Module pretest
FET TPH3208, Dead Time 5.5ns
YouTube


The sound of the amplifier turned out to be very interesting, extremely detailed.



Last edited by Sous; 14th January 2020 at 09:21 PM.
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Old 14th January 2020, 09:17 PM   #16
silverprout is offline silverprout  France
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Could you say something about the SNR please ?
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Old 14th January 2020, 09:25 PM   #17
Sous is offline Sous  Ukraine
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more than 1 W above 100dB, unfortunately the measuring stand is not of sufficient resolution.
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Old 14th January 2020, 09:36 PM   #18
silverprout is offline silverprout  France
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Quote:
Originally Posted by Sous View Post
more than 1 W above 100dB, unfortunately the measuring stand is not of sufficient resolution.
The noise floor is a tad high ?
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Old 19th January 2020, 10:24 AM   #19
Reactance is offline Reactance  South Africa
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very nice work, will you be releasing an updated schematic ?
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Old 21st January 2020, 01:37 AM   #20
ttako is offline ttako
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What software are you using for THD and SNR measurement?
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