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-   -   amplifier with 12v supply (http://www.diyaudio.com/forums/chip-amps/231652-amplifier-12v-supply.html)

yoosefheidari 9th March 2013 07:25 AM

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

AndrewT 9th March 2013 08:30 AM

chips designed for automobile use fit this requirement.

JonSnell Electronic 9th March 2013 08:50 AM

TDA7297 2*15W Audio Amplifier Board 15W+15W Dual-Channel DIY AC/DC 12V Update on eBay!

JonSnell Electronic 9th March 2013 08:53 AM

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.

tabarddn 9th March 2013 09:05 AM

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:D

yoosefheidari 9th March 2013 07:38 PM

thank you guys:)

Mihkus 9th March 2013 08:30 PM

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.

JMFahey 9th March 2013 08:56 PM

Quote:

Originally Posted by tabarddn (Post 3402565)
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:D

Sorry but none of these provides such power out with 12V supply.

ChristianThomas 9th March 2013 09:02 PM

Quote:

Originally Posted by JMFahey (Post 3403401)
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.

Jay 9th March 2013 11:49 PM

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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