Stereo chip amp -- 10 to 15W

jmar · 19th January 2010, 06:48 PM

Can anyone suggest a part number for a stereo amp that will deliver 10 - 15 watts (for a PC amp), commonly available.

I want to use a standard 12v 2A wall transformer and get that up to 14v or so with a bridge.

Most bang for the buck?

No class D nonsense -- good ole AB.

wahab · 19th January 2010, 06:56 PM

phillips TDA1558Q is good in term of simplicity/perfs..
the 4 amps for a stereo bridge are in one case,
and the number of external components is surprisingly low...

jmar · 19th January 2010, 09:04 PM

surprisingly low is right -- a few caps and the speakers.

thanks. not recommended for new designs only drawback.

MCLL · 20th January 2010, 09:27 AM

How about TDA2009a?

http://www.st.com/stonline/products/...7/tda2009a.pdf

AndrewT · 20th January 2010, 09:45 AM

Quote:

Originally Posted by MCLL

How about TDA2009a?
http://www.st.com/stonline/products/...7/tda2009a.pdf

this one is probably typical of what can be achieved with ClassAB from a single polarity supply.
It works from 8V to 28V.
The maximum output @ 0.1% distortion is 3.5W into 8r0 from +24Vdc and 2.5W into 8r0 from 18Vdc.
From 14Vdc the output will be even lower.

You either need more supply voltage or a different style of amplification to get 10W to 15W into 8r0.

ratza · 20th January 2010, 10:09 AM

12V and 2A power supply means 24W available, and maximum half of it can be the output power of the amplifier (in class AB). 2x6W that is.

AndrewT · 20th January 2010, 10:33 AM

15W into 8r0 requires ~11Vac to the speaker.
This can only be achieved from ClassAB with a PSU of >=33Vdc.
It can be single polarity 34V or dual polarity +-17Vdc.

wahab · 20th January 2010, 10:46 AM

Quote:

Originally Posted by AndrewT

15W into 8r0 requires ~11Vac to the speaker.
This can only be achieved from ClassAB with a PSU of >=33Vdc.
It can be single polarity 34V or dual polarity +-17Vdc.

or single polarity +17v and a bridged amp...

AndrewT · 20th January 2010, 11:00 AM

Quote:

Originally Posted by jmar

No class D nonsense -- good ole AB.

he asked for ClassAB
not for a pair of bridged AB

wahab · 20th January 2010, 11:16 AM

Quote:

Originally Posted by AndrewT

he asked for ClassAB
not for a pair of bridged AB

for class AB, with no other mention...
anyway, to extract this power from a 14v supply,
there s no other way...

19th January 2010, 06:48 PM	#1
jmar diyAudio Member Join Date: Jan 2004 Location: Indiana	Stereo chip amp -- 10 to 15W Can anyone suggest a part number for a stereo amp that will deliver 10 - 15 watts (for a PC amp), commonly available. I want to use a standard 12v 2A wall transformer and get that up to 14v or so with a bridge. Most bang for the buck? No class D nonsense -- good ole AB.

20th January 2010, 10:09 AM	#6
ratza diyAudio Member Join Date: Dec 2007 Location: Sibiu, Romania	12V and 2A power supply means 24W available, and maximum half of it can be the output power of the amplifier (in class AB). 2x6W that is. __________________ Any solution is a compromise.

20th January 2010, 10:33 AM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	15W into 8r0 requires ~11Vac to the speaker. This can only be achieved from ClassAB with a PSU of >=33Vdc. It can be single polarity 34V or dual polarity +-17Vdc. __________________ regards Andrew T.

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19th January 2010, 06:56 PM	#2
wahab diyAudio Member Join Date: Nov 2009 Location: algeria/france	phillips TDA1558Q is good in term of simplicity/perfs.. the 4 amps for a stereo bridge are in one case, and the number of external components is surprisingly low...

19th January 2010, 09:04 PM	#3
jmar diyAudio Member Join Date: Jan 2004 Location: Indiana	surprisingly low is right -- a few caps and the speakers. thanks. not recommended for new designs only drawback.

20th January 2010, 09:27 AM	#4
MCLL diyAudio Member Join Date: Dec 2002 Location: Hong Kong	How about TDA2009a? http://www.st.com/stonline/products/...7/tda2009a.pdf

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