Bridging a TDA1517

wadehavens · 27th April 2009, 02:12 PM

Hi there, I'm new to forum and I love it. There is alot of great info here. However, I have one question I hope some of you can help me out with.

I'm building a guitar amp out of a TDA1517 that I pulled from an old sound card. I have it all working just fine, however, I would like to bridge the two outputs to one mono output and I just want to make sure I'm doing it right. So far all I have is the standard schematic build taken from the TDA1517 datasheet. I'll add a preamp and all the tonal goodies after I have everything right with the chip.

Thanks!!

Wade

pacificblue · 28th April 2009, 10:47 AM

You can copy the output conenction from the TDA1519A's datasheet page 9. The inputs remain the same, but one of them, e. g. will be connected to ground.

wadehavens · 28th April 2009, 08:58 PM

Thank you very much!!!

Joshua Gobin · 25th October 2011, 03:13 PM

it is highly unlikely that u can bridge this amplifier since in order to successfully bridge an amp u must be able to shift the input 180 degrees out of phase from each other. and according to the data sheet only the non inverting inputs are given.. the only way is if u use an inverting pre amp on one of the inputs.

Th3 uN1Qu3 · 25th October 2011, 07:24 PM

If you had read the datasheet you would've noticed it CAN be bridged, because they give the inverting input on one of the channels and the noninverting input on the other.

While in stereo mode, one of the speakers is simply wired the other way round to keep correct phase.

johnr66 · 25th October 2011, 11:42 PM

Quote:

Originally Posted by Th3 uN1Qu3

If you had read the datasheet you would've noticed it CAN be bridged, because they give the inverting input on one of the channels and the noninverting input on the other.

While in stereo mode, one of the speakers is simply wired the other way round to keep correct phase.

This is true on the 1519A, but NOT on the 1517. The 1517's inputs are non inverting on both channels. He would need an inverting buffer on one of the channels.

Also, when bridging the 1517, you have to use 8 Ohm loads due to the current limit. Okay for 4 Ohms if Vs less than 12 volts.

Th3 uN1Qu3 · 26th October 2011, 04:58 AM

Funny - the datasheet i opened yesterday said it's bridgeable from the first page. Now i can't find that particular one... I guess it was a typo on my part and i actually opened the datasheet of something else, sorry. The 1517 does indeed have only noninverting inputs available to the outside world.

27th April 2009, 02:12 PM	#1
wadehavens diyAudio Member Join Date: Mar 2009	Bridging a TDA1517 Hi there, I'm new to forum and I love it. There is alot of great info here. However, I have one question I hope some of you can help me out with. I'm building a guitar amp out of a TDA1517 that I pulled from an old sound card. I have it all working just fine, however, I would like to bridge the two outputs to one mono output and I just want to make sure I'm doing it right. So far all I have is the standard schematic build taken from the TDA1517 datasheet. I'll add a preamp and all the tonal goodies after I have everything right with the chip. Thanks!! Wade

28th April 2009, 10:47 AM	#2
pacificblue diyAudio Member Join Date: May 2008	You can copy the output conenction from the TDA1519A's datasheet page 9. The inputs remain the same, but one of them, e. g. will be connected to ground. __________________ If you've always done it like that, then it's probably wrong. (Henry Ford)

25th October 2011, 03:13 PM	#4
Joshua Gobin diyAudio Member Join Date: Jul 2011	tda1517 it is highly unlikely that u can bridge this amplifier since in order to successfully bridge an amp u must be able to shift the input 180 degrees out of phase from each other. and according to the data sheet only the non inverting inputs are given.. the only way is if u use an inverting pre amp on one of the inputs.

25th October 2011, 07:24 PM	#5
Th3 uN1Qu3 diyAudio Member Join Date: Feb 2010 Location: Bucharest	If you had read the datasheet you would've noticed it CAN be bridged, because they give the inverting input on one of the channels and the noninverting input on the other. While in stereo mode, one of the speakers is simply wired the other way round to keep correct phase. __________________ "Audio grade" components simply means that they failed at a more critical job.

26th October 2011, 04:58 AM	#7
Th3 uN1Qu3 diyAudio Member Join Date: Feb 2010 Location: Bucharest	Funny - the datasheet i opened yesterday said it's bridgeable from the first page. Now i can't find that particular one... I guess it was a typo on my part and i actually opened the datasheet of something else, sorry. The 1517 does indeed have only noninverting inputs available to the outside world. __________________ "Audio grade" components simply means that they failed at a more critical job.


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28th April 2009, 08:58 PM	#3
wadehavens diyAudio Member Join Date: Mar 2009	Thank you very much!!!

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