Best Class-D Chip/Chipset to meet the attached specifications

alvaius · 25th January 2009, 08:32 PM

Well hopefully all the knowledgeable people on here can give me some assisstance... I am looking for a class-D chip/chipset that will be able to meet the following requirements.

1) Must not be Tripath - I want to be assured I can buy the chips and if things work out, have a stable supplier.

2) Single supply, in the 24V range.

3) Ideally 40-50W into 8 ohm and stable without issues into 4ohm without changing the power supply of course.

4) High quality is important. I would pay more for quality and will tweak as needed.

5) Analog Input.

6) In keeping with #1, it must be available.

I have not done a class-D, but have lots of power supply design and general audio experience so I am not too worried about complexity of implementation and will be doing a full up custom PCB.

Any suggestions are of course appreciated.

Saturnus · 25th January 2009, 09:28 PM

Quote:

Originally posted by alvaius
2) Single supply, in the 24V range.

3) Ideally 40-50W into 8 ohm and stable without issues into 4ohm without changing the power supply of course.

These two are mutually excluding eachother. It's not possible to have 40-50W into 8 ohms on a 24 volt single supply unless you talking in the 10%+ THD range, that is.

alvaius · 26th January 2009, 08:36 PM

DOh! Helps if you read what you write. That should have been 40 to 50W into 4ohm, not into 8 ohms.

I am hoping with a 24 volt raise and bridged I can swing withing 2 volts of the rails without much distortion for about 25 watts.

Alvaius

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25th January 2009, 08:32 PM	#1
alvaius diyAudio Member Join Date: Feb 2002 Location: Toronto	Best Class-D Chip/Chipset to meet the attached specifications Well hopefully all the knowledgeable people on here can give me some assisstance... I am looking for a class-D chip/chipset that will be able to meet the following requirements. 1) Must not be Tripath - I want to be assured I can buy the chips and if things work out, have a stable supplier. 2) Single supply, in the 24V range. 3) Ideally 40-50W into 8 ohm and stable without issues into 4ohm without changing the power supply of course. 4) High quality is important. I would pay more for quality and will tweak as needed. 5) Analog Input. 6) In keeping with #1, it must be available. I have not done a class-D, but have lots of power supply design and general audio experience so I am not too worried about complexity of implementation and will be doing a full up custom PCB. Any suggestions are of course appreciated.

26th January 2009, 08:36 PM	#3
alvaius diyAudio Member Join Date: Feb 2002 Location: Toronto	DOh! Helps if you read what you write. That should have been 40 to 50W into 4ohm, not into 8 ohms. I am hoping with a 24 volt raise and bridged I can swing withing 2 volts of the rails without much distortion for about 25 watts. Alvaius