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Old 9th March 2013, 07:25 AM   #1
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Default amplifier with 12v supply

hi
first of all sorry for my bad english.
i want build a stereo amplifier with an chip that work with 12v supply and give 15-20 watt per channel.
my choice is TDA7297 but it give about 9 watt per channel with 12v
please guide me for choose a goodchip(12v supply) whit good sound.
thank you
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Old 9th March 2013, 08:30 AM   #2
AndrewT is offline AndrewT  Scotland
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chips designed for automobile use fit this requirement.
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Old 9th March 2013, 08:50 AM   #3
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TDA7297 2*15W Audio Amplifier Board 15W+15W Dual-Channel DIY AC/DC 12V Update on eBay!
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Old 9th March 2013, 08:53 AM   #4
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It is very difficult to achieve more than 15Watts from a 12Volt supply, even with the bridge mode amplifier TDA7297 as there are current drive limitations to consider.
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Old 9th March 2013, 09:05 AM   #5
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Hi look at these amps Chips from Texas Ind, these are class D with PRAT and base to die for
TPA3130D2 15 watts
TPA3118D2 30 watts
TPA3116D2 50 watts
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Old 9th March 2013, 07:38 PM   #6
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thank you guys
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Old 9th March 2013, 08:30 PM   #7
Mihkus is offline Mihkus  Estonia
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TDA1519C sounds pretty clear in mono but still, most low voltage amplifiers sound terrible.
TDA7850 is one of the mighty amps 4 channels and like 10w clean power.
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Old 9th March 2013, 08:56 PM   #8
JMFahey is offline JMFahey  Argentina
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Quote:
Originally Posted by tabarddn View Post
Hi look at these amps Chips from Texas Ind, these are class D with PRAT and base to die for
TPA3130D2 15 watts
TPA3118D2 30 watts
TPA3116D2 50 watts
Sorry but none of these provides such power out with 12V supply.
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Old 9th March 2013, 09:02 PM   #9
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Quote:
Originally Posted by JMFahey View Post
Sorry but none of these provides such power out with 12V supply.
I haven't looked but are you sure? Most Class D amps are bridged so you have effectively twice the voltage swing. Do we in fact have a figure for his load impedance anyway?

Incidentally, is there any reason that the Tripath amps, TA2020 etc, haven't been mentioned? They are surely among the easiest and best sounding things to meet this requirement - especially if you get them pre-built from Arjen Helder.
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Old 9th March 2013, 11:49 PM   #10
Jay is offline Jay  Indonesia
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Like AndrewT said, car chip amps...

TA8225 (and even TA8210, which is the mostly used car chip amp for home mini hifi) has always amazed many listeners. It is rated for 45W but of course you don't need that highly distorted signal. At 4W/4R/1K it gives 0.015%, a very good number.
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