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Class D Switching Power Amplifiers and Power D/A conversion

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Old 24th April 2007, 10:05 AM   #131
Pierre is offline Pierre  France
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Sorry, I have reviewed my calculations and the Yorkville seems to switch at 70KHz.
The oscillator is U8, a 555 in astable multivibrator mode (resistors are both 1K, but the timing cap is C32, 6n8, while I had taken C80, 100nF, that is only a bypass cap).
(The sawtooth is not symmetrical at all, however: 9.4us vs 4.7us) I suppose that's compensated by feedback.
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Old 24th April 2007, 10:28 AM   #132
luka is offline luka  Slovenia
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Hi

Thats much much better
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Old 24th April 2007, 01:11 PM   #133
TOINO is offline TOINO  Portugal
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Voilą Pierre

And now friends?... should we help umut1001?
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Old 24th April 2007, 03:10 PM   #134
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Default hi ..ir2110 fullbridge

hi everybody..i bought many ir2110 ,1n4148 ,1n4007 ,bc546 and uf4007(ultra fast diode)..and i found a good and cheap toroid transformer but i didnt buy it yet..it is 60usa dollars ..made in italy and 33.6volts 16 amperes and..it makes 47 volt dc..can i make a 250 watts of amplifier with that transformer?i think i can use 2 ohms load..and i want to buy lm311 or lm319 ..i do not know which one i prefer?i want to use lt1016 but i couldnt find lt1016 for comparating opamp..thanks
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Old 22nd May 2007, 02:51 PM   #135
luka is offline luka  Slovenia
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Hi SSassen

I see that you have some kind of power calculator for LTSpice, could you send me one?
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