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Chip Amps Amplifiers based on integrated circuits

chipamp suggestion for 3w 4ohm
chipamp suggestion for 3w 4ohm
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Old 3rd March 2015, 03:13 PM   #1
zany7 is offline zany7  United States
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Default chipamp suggestion for 3w 4ohm

Hey there guys im having a tough time building an amplifier for my 3w 4ohm speakers. I previously used tda2050 and it didn't work maybe a fake ic. i want build my amp with a suitable chip. Im okay with class d and class ab.
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Old 3rd March 2015, 07:05 PM   #2
phase is offline phase  United States
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I'll bet an ebay tda7297, or a ta8250 pre-made board would work.
Don't let the 15w ratings scare you, would work fine with a 1 or 2 amp power supply and those speakers.
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Old 3rd September 2015, 02:15 AM   #3
tedkok is offline tedkok  Hong Kong
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you can try a new linear amplifier IC

CS6A4989

from Canaan Semiconductor which is available from Profusion or Clere.
Datasheet is available at

https://www.profusionplc.com/images/...heets/cs4989_b
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Old 3rd September 2015, 02:24 AM   #4
abraxalito is offline abraxalito  United Kingdom
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Location: Hangzhou - Marco Polo's 'most beautiful city'. 700yrs is a long time though...
The DS for that chip is full of contradictions, doesn't engender confidence that the designers knew what they were doing.

Just a couple of examples - the absolute max supply is 38V but when shown as two separate supply voltages, the max is +/-12V. The abs max junction temp is shown as 70oC but the highest recommended ambient operating temp is 75oC.
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Old 3rd September 2015, 03:39 AM   #5
tedkok is offline tedkok  Hong Kong
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It seems that Profusion is not hosting the latest datasheet.
You may find the latest from canaan's website

http://www.canaan-semi.com/_media/CS...B_19Jun15a.pdf

Demo board of this amplifier is available from Profusion, and
Clere, Have a try.
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Old 3rd September 2015, 02:25 PM   #6
johnr66 is offline johnr66  United States
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The OP is probably long gone, but look at the LA4425A. It 5 watts but at 12.6 volts you will actually only get about 3 clean watts into 4 ohm loads. Very simple low part count fixed gain IC. Works good in the post TDA2003 era aside from having a bit too much gain.
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Old 22nd April 2016, 12:57 AM   #7
tedkok is offline tedkok  Hong Kong
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A 4W @4ohm amplifier module that use CS6A4989 is now available in

http://www.eltim.eu/data/mediablocks...%20PA-4989.pdf

It's linear, low distortion and power efficient.
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Old 22nd April 2016, 07:41 PM   #8
danielwritesbac is offline danielwritesbac  United States
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Howabout that wee PAM class d amp? That is already built.
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