Hi Fi Class D

edicleberyahoo · 9th September 2010, 11:19 PM

Hello Guys,

I need to develop a Class D amplifier with high fidelity, with a switching frequency of around 1.5MHz, anyone have any suggestions first? Driver? Mosfet? Circuit?

Hugs to all.
Cleber

edicleberyahoo · 9th September 2010, 11:21 PM

would it be possible to arrive at that frequency switching with the UCD Philips?

Andrew Eckhardt · 11:35 PM

You could use a self oscillating circuit but one major difference is the propagation delay in yours will have to be several times shorter than anything I've seen designed on here, so it will probably have to use a fairly fancy comparator. The only way you're going to go that fast with lots of efficiency is to go multiphase or using the GaN FETs from EPC, or both.

How did you arrive at the necessity of such speed, not that I don't think it's there. You didn't say audio, just high fidelity.

edicleberyahoo · 10th September 2010, 12:06 AM

I need your system has the least possible distortion and the response as flat as possible.
I need an amplifier with the tone like the Powersoft

edicleberyahoo · 10th September 2010, 12:13 AM

I need a frequency response up to 45kHz - 3dB

DjLeco · 10th September 2010, 12:26 AM

for 45 Khz superior band is enough 500 Khz freq, recommended 614 Khz like Labgruppen uses it..

edicleberyahoo · 10th September 2010, 12:34 AM

to the optimal topology? UCD? Auto Osc? Oscillator fixed?

AP2 · 10th September 2010, 12:07 PM

Hi,
is easier than you buy ready to listen to these performances that have requested..

Regards

Pafi · 10th September 2010, 04:08 PM

AP2!

Some into just forum pour words the, them will sort readers the!

AP2 · 10th September 2010, 04:42 PM

Quote:

Originally Posted by Pafi

AP2!

Some into just forum pour words the, them will sort readers the!

Hi,
are you talking about, I did not understand your post.
My post is ironic because the characteristics that wants to get Cleber is very difficult for those high frequencies.
What did you think you?

9th September 2010, 11:19 PM	#1
edicleberyahoo diyAudio Member Join Date: May 2009	Hi Fi Class D Hello Guys, I need to develop a Class D amplifier with high fidelity, with a switching frequency of around 1.5MHz, anyone have any suggestions first? Driver? Mosfet? Circuit? Hugs to all. Cleber

9th September 2010, 11:32 PM	#3
Andrew Eckhardt diyAudio Member Join Date: Nov 2005 Location: PA	You could use a self oscillating circuit but one major difference is the propagation delay in yours will have to be several times shorter than anything I've seen designed on here, so it will probably have to use a fairly fancy comparator. The only way you're going to go that fast with lots of efficiency is to go multiphase or using the GaN FETs from EPC, or both. How did you arrive at the necessity of such speed, not that I don't think it's there. You didn't say audio, just high fidelity. Last edited by Andrew Eckhardt; 9th September 2010 at 11:35 PM.

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9th September 2010, 11:21 PM	#2
edicleberyahoo diyAudio Member Join Date: May 2009	would it be possible to arrive at that frequency switching with the UCD Philips?

10th September 2010, 12:06 AM	#4
edicleberyahoo diyAudio Member Join Date: May 2009	I need your system has the least possible distortion and the response as flat as possible. I need an amplifier with the tone like the Powersoft

10th September 2010, 12:13 AM	#5
edicleberyahoo diyAudio Member Join Date: May 2009	I need a frequency response up to 45kHz - 3dB

10th September 2010, 12:26 AM	#6
DjLeco diyAudio Member Join Date: Oct 2006 Location: Bucharest, Romania	for 45 Khz superior band is enough 500 Khz freq, recommended 614 Khz like Labgruppen uses it..

10th September 2010, 12:34 AM	#7
edicleberyahoo diyAudio Member Join Date: May 2009	to the optimal topology? UCD? Auto Osc? Oscillator fixed?

10th September 2010, 12:07 PM	#8
AP2 diyAudio Member Join Date: Dec 2009 Location: Italy	Hi, is easier than you buy ready to listen to these performances that have requested.. Regards

10th September 2010, 04:08 PM	#9
Pafi diyAudio Member Join Date: May 2004 Location: Budapest	AP2! Some into just forum pour words the, them will sort readers the!

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