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Class D Switching Power Amplifiers and Power D/A conversion

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Old 24th March 2008, 04:44 PM   #31
luka is offline luka  Slovenia
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Hi

Good news, after some problems... I was able to get 273w on bench with 11.59v @ CT and 94.7 on output...

Then in car, first with 50Hz tone, 11.0v input of smps, which is 0.5m away from CT, connected with 20mm^2, output of smps should be 93v, amp was just before clip I think, so about 270w sinewave on 240w rated sub

Then with car on, output voltage was pretty much dead solid at 126v, volume was pretty high and I was . At that point I stoped because I was afraid I would burn speaker, or break panels of my car or something like that...

There was ~7C in car, so was smps and amp, no heat what so ever, just output inductors of both channel and chip (driver), and they had about say 20C

Now I think is time to finish case, and make other circuits for it...I want to see the power of bridge
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Old 25th March 2008, 09:26 PM   #32
v-bro is offline v-bro  Netherlands
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Hey, nice switchmode supply! What driver did you use?

I think Jan can still supply the older PCB of AMP2 for those who are interested.... Want me to ask him?
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Old 25th March 2008, 10:55 PM   #33
luka is offline luka  Slovenia
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Hi

SG3525, buffers for each side, remote on,under/over voltage, no feedback...runs perfect
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