Hello everyone! I know some of you would clame soon that i should first look around the forum... bla bla bla... But i already did it and didn't found a thread explaining more and clearly about this amplifier.
What i'm seeking here is the knowledge for design one of those amplifier wich doesn't depend of external frequency, are auto adjustable and can be done with a few components and a large amout of power over the output.
The UcD technology i didn't got it very well, seems a little bit more complex than a single comparator self oscillating, self adjustable, high capability amplifier.
So. What i need is a simple project and a explanation to learn how this works and some design considerations.
Hope some hero appears to save the day!
What i'm seeking here is the knowledge for design one of those amplifier wich doesn't depend of external frequency, are auto adjustable and can be done with a few components and a large amout of power over the output.
The UcD technology i didn't got it very well, seems a little bit more complex than a single comparator self oscillating, self adjustable, high capability amplifier.
So. What i need is a simple project and a explanation to learn how this works and some design considerations.
Hope some hero appears to save the day!
I have seen a very simple class d amp using a NE555 timer.
Use the control pin as audio in to modulate the signal out.
Use the control pin as audio in to modulate the signal out.
I did saw that too, but it requires full bridge and i think it's expensive for high power to use it.
I'm interest on self oscillating comparators as Class D amplifiers.
I'm interest on self oscillating comparators as Class D amplifiers.
I have used the IRS2092 as few times.
The biggest amp I have done was 1000 watts but there are designs out there much bigger.
The biggest amp I have done was 1000 watts but there are designs out there much bigger.
UCD Self oscillating is a simple, attractive and efficient modulation scheme probably the best in terms of its simplicity it uses an array of different studies in electronics to reach satisfactory results, as a matter of fact class-D as a whole is much more challenging than AB stuff we all use to, AB is pale in terms of educational value in this area of audio amplification.
If you serious you can go through the D-forum (from 2004) and dig up nice tips and advice if you serious enough.. with that knowledge you can build a killer version (just don't be lazy to use the pager you might miss good advice !), however with limited of knowledge in high speed electronics and PCB layout im afraid you like many of us (having basic knowledge) will not achieve a stable prototype, if its for fun then go ahead 🙂
If you want a working build a class d amplifier with a "stable" functional modulator then try the stuff nigel has recommended its easy to use provided you have a PCB which of course is just as critical as the amplifier you constructing then go for it.
Sorry, but in the world of DIY class-D we become our own hero, with persistent attempts and taking the advice from others.
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UCD Self oscillating is a simple, attractive and efficient modulation scheme probably the best in terms of its simplicity it uses an array of different studies in electronics to reach satisfactory results, as a matter of fact class-D as a whole is much more challenging than AB stuff we all use to, AB is pale in terms of educational value in this area of audio amplification.
If you serious you can go through the D-forum (from 2004) and dig up nice tips and advice if you serious enough.. with that knowledge you can build a killer version (just don't be lazy to use the pager you might miss good advice !), however with limited of knowledge in high speed electronics and PCB layout im afraid you like many of us (having basic knowledge) will not achieve a stable prototype, if its for fun then go ahead 🙂
If you want a working build a class d amplifier with a "stable" functional modulator then try the stuff nigel has recommended its easy to use provided you have a PCB which of course is just as critical as the amplifier you constructing then go for it.
Sorry, but in the world of DIY class-D we become our own hero, with persistent attempts and taking the advice from others.
I surely see your point. But it's time to take this under a minimum debate so people like us can archieve some minimum knowledge to start prototype some ideas. There're people over here that knows even delta sigma modutation, with microcontrollers and stuff, and my guess is that we can discover some thigs with a little effort.
http://www.freepatentsonline.com/7046727-0-large.jpg
http://images.elektroda.net/23_1232916064.gif
I do not understand how this amplifiers above self oscillates, or even if it's the better approach, but i'm bringing it here for some opinions.
Hope people with bigger knowledge be willing to explain and teach us.
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