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Class D Switching Power Amplifiers and Power D/A conversion

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Old 14th November 2011, 09:54 AM   #31
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Default TDA7492 and TDA7498 (ST)

I guess, this both IC models from SGS-Thomson are available for a long time:

TDA7492
http://www.st.com/internet/com/TECHN...CD00244535.pdf
Distortion Tests - HifimeDIY T2 / LJM L20D / SURE TDA7498
TDA7498
http://www.st.com/internet/com/TECHN...CD00205863.pdf
Sure Electronics -- New low cost 25w-100W board
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Quote:
Originally Posted by RaiTulo View Post
Or ICL8038 ICL8038
Detailed Schematic page 4
Thank you. Here the datasheet-URL:
http://www.intersil.com/data/fn/fn2864.pdf

Last edited by tiefbassuebertr; 14th November 2011 at 09:57 AM.
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Old 14th November 2011, 10:27 AM   #32
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supplement to last post (ICL8038):
Intersil's application note "ANO13.1":
http://www.intersil.com/data/an/an013.pdf
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Old 16th November 2011, 07:55 PM   #33
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I can't find simple 'diy frendly' functional amp on this forum... this is JBL full bridge 500W amp with TL072, IR2111 and 4xIRFP250, work good with 18inch PA sub. Next is CREST clone with NE5532, LM319 and IR2113...
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Old 16th November 2011, 08:34 PM   #34
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Quote:
Originally Posted by apexaudio View Post
I find nice UcD amp like Hypex in service manual of philips mini system, pcb is for stereo but with SMD parts.
Hi Apex, if you ever decide to go deeper into class D, use this one as a reference, it's state of the art unlike the other stuff posted.
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Old 17th November 2011, 06:38 PM   #35
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Quote:
Originally Posted by Eva View Post
Hi Apex, if you ever decide to go deeper into class D, use this one as a reference, it's state of the art unlike the other stuff posted.
I need more references like this Onkyo and Sony, or diy class D amp like this http://www.youtube.com/watch?v=HJhOOJ4qTOc
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File Type: jpg SONY UCD1.JPG (141.3 KB, 1926 views)
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File Type: jpg ONKYO UCD1.JPG (119.5 KB, 1025 views)

Last edited by apexaudio; 17th November 2011 at 06:47 PM.
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Old 18th November 2011, 08:26 AM   #36
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Quote:
Originally Posted by apexaudio View Post
I can't find simple 'diy frendly' functional amp on this forum... this is JBL full bridge 500W amp with TL072, IR2111 and 4xIRFP250, work good with 18inch PA sub. Next is CREST clone with NE5532, LM319 and IR2113...
about the thread
Building a 1000W @ 8ohms class D amplifier from zero
there is also to find an interesting approach.
Actually it would be helpful to create a Class-D evaluation board, to find out the pros and cons of various topologies and sample rates - with discrete devices of course (or quasi-discrete with standart ICs like drivers, comparators, VCO's and operational amplifier).
Who is able to develope such an evaluation board?
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Old 18th November 2011, 09:37 AM   #37
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Quote:
Originally Posted by tiefbassuebertr View Post
Actually it would be helpful to create a Class-D evaluation board, to find out the pros and cons of various topologies and sample rates - with discrete devices of course (or quasi-discrete with standart ICs like drivers, comparators, VCO's and operational amplifier).
Who is able to develope such an evaluation board?
Agreed, and since I need such a "sandbox" myself, I am re-targeting the one in this thread for that purpose. One difficult decision is SMD vs. through-hole: SMD is not DIY-friendly, but through-hole drastically restricts the choice of eg modern drivers, and places limits on speed. Currently I'm playing with partitioning concepts, i.e. have a TH base board and SMD daughterboards.
Stay tuned...
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Old 18th November 2011, 11:22 AM   #38
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JBL new class D amp
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Last edited by apexaudio; 18th November 2011 at 11:33 AM.
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Old 18th November 2011, 12:15 PM   #39
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Triangle oscillator from FBT
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Old 18th November 2011, 09:00 PM   #40
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Error amp, triangle osccilator, comparator ...
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