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Old 3rd January 2010, 02:20 PM   #1
johnr66 is offline johnr66  United States
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Default Stereo power amp, 24 volt supply

Hi,
I'm looking for a chip amp that meets the following:
powered from a 24 volt (single) supply.
2 Channel
Ability to drive 4 Ohm loads.
low part count to keep costs down
fixed gain preferable (less parts)
Single ended (no BTL)

I'm thinking like a TDA1517, but with higher voltage supply that means higher power output.

Thanks!
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Old 3rd January 2010, 02:49 PM   #2
wahab is offline wahab  Algeria
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TDA2040 will do it perfectly...just don t forget to add two 1N4004
(in reverse mode of course) from the amp pin output (pin 4) to supply rails
if you are to use this single power supply..
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Old 3rd January 2010, 02:53 PM   #3
sexya is offline sexya  India
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hii
with that 24volt single rail , i would suggest TPA3122 , dip16 package, Class D , simple to use and good out put 15 watt per channel , no heatsink requirements and single side board design,
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Old 4th January 2010, 04:36 PM   #4
johnr66 is offline johnr66  United States
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Thanks for the replies. I'll probably try a class D in another project, but want analog for now.

Why clamping diodes on the TDA2040 in single supply, reduced power use?
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Old 4th January 2010, 05:30 PM   #5
sexya is offline sexya  India
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noo its to do something with keep ing output capacitors charged or preventng dc from causing loud pops when powerd on , nothing for efficency jst safty and stabilty
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Old 11th November 2014, 08:25 AM   #6
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Quote:
Originally Posted by sexya View Post
noo its to do something with keep ing output capacitors charged or preventng dc from causing loud pops when powerd on , nothing for efficency jst safty and stabilty
not for the above ....just to bypass the stored charge in the capacitor to supply rains when power is disrupted.In other words to safeguard the output transistors inside the chip.
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Old 12th November 2014, 12:26 PM   #7
Mihkus is offline Mihkus  Estonia
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Id choose TPA3122 over everything else as its simple and widely used.
It sounds great for class D but has strange highs, so you might not like it.
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Old 12th November 2014, 04:24 PM   #8
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Simple options include TDA2040 and LM1875.
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Old 12th November 2014, 05:06 PM   #9
johnr66 is offline johnr66  United States
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Old question from almost 5 years ago. Now, my first pick is the LM1875 instead of a two channel ICs. I don't recommend the TDA20X0 ICs anymore because they were made obsolete over a year ago and sources of new authentic parts may be in question.
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