About TDA7250/TDA1514A

MaXiZ · 12th October 2003, 04:08 PM

Is there someone experienced or that have already build a power amp based on TDA7250 or TDA1514A that can givemesome tips on the most important thing to check and how many power is needed to make it at least run? I own a SMPS +/-35V@2.5A..

JojoD818 · 12th October 2003, 05:00 PM

Hi,

I have built and used a TDA1514A powered by a 18V-0-18V@10A transformer and 4pcs 4,700uf per rail (8 in total). I have used it for awhile and have excellent result. Later I used it to power 2 10" sub in a push-pull config. Excellent result again.

So good that a friend bought it! An example of a diy hobby that makes you some money for more diy hobby!

Hope this helps,
JojoD

JojoD818 · 12th October 2003, 05:01 PM

BTW, I think this thread belongs more appropriately to ChipAmps.

JojoD

MaXiZ · 12th October 2003, 05:42 PM

Did it really need so much power? 10A????
ANd could u post the schematic u used for build so good amplifier?

JojoD818 · 13th October 2003, 03:16 AM

this is what i used. you can omit the caps between the rails if your psu is good enough and placed close to the ic.

JojoD818 · 13th October 2003, 03:19 AM

a bridged 1514A

mcp · 13th October 2003, 08:25 AM

Hi MaXiZ

You are almost there with your TDA7250. It will work with +-35V. Though 2.5A is not enough for maximum power output, it is not an immediate problem as you don't need the power now. What you want is to get the amp to work first.

Are you using TIP142 AND TIP147?

Here are some pictures on how I tested the TDA7250

dhaen · 13th October 2003, 08:55 AM

The TDA1514A is an excellent chip (praise indeed from a valve/tube man

) I've been using them in products for several years. I've used the Philips circuit, and the results have always been good.

Enjoy.

Thread moved to Chip Amps Forum.

mcp · 13th October 2003, 09:48 AM

Yes, I agree. The funny part is, when I ran it at 18-0-18Vac, instead of 20-0-20, it sounded much better. I heard that this part is now discontinued. It would be a shame if it is.

MaXiZ · 14th October 2003, 06:41 PM

Quote:

Though 2.5A is not enough for maximum power output

And what's the optimum supply?
I mean Voltage/Current!!!

12th October 2003, 04:08 PM	#1
MaXiZ diyAudio Member Join Date: Jun 2003 Location: Italy	About TDA7250/TDA1514A Is there someone experienced or that have already build a power amp based on TDA7250 or TDA1514A that can givemesome tips on the most important thing to check and how many power is needed to make it at least run? I own a SMPS +/-35V@2.5A..

13th October 2003, 08:25 AM	#7
mcp diyAudio Member Join Date: Jul 2002 Location: Vacation Land	TDA7250 Amp Hi MaXiZ You are almost there with your TDA7250. It will work with +-35V. Though 2.5A is not enough for maximum power output, it is not an immediate problem as you don't need the power now. What you want is to get the amp to work first. Are you using TIP142 AND TIP147? Here are some pictures on how I tested the TDA7250 __________________ Michael Chua

13th October 2003, 09:48 AM	#9
mcp diyAudio Member Join Date: Jul 2002 Location: Vacation Land	Yes, I agree. The funny part is, when I ran it at 18-0-18Vac, instead of 20-0-20, it sounded much better. I heard that this part is now discontinued. It would be a shame if it is. __________________ Michael Chua

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12th October 2003, 05:00 PM	#2
JojoD818 diyAudio Moderator Join Date: Mar 2003 Location: diyAudio Special Operations Center	Hi, I have built and used a TDA1514A powered by a 18V-0-18V@10A transformer and 4pcs 4,700uf per rail (8 in total). I have used it for awhile and have excellent result. Later I used it to power 2 10" sub in a push-pull config. Excellent result again. So good that a friend bought it! An example of a diy hobby that makes you some money for more diy hobby! Hope this helps, JojoD

12th October 2003, 05:01 PM	#3
JojoD818 diyAudio Moderator Join Date: Mar 2003 Location: diyAudio Special Operations Center	BTW, I think this thread belongs more appropriately to ChipAmps. JojoD

12th October 2003, 05:42 PM	#4
MaXiZ diyAudio Member Join Date: Jun 2003 Location: Italy	Did it really need so much power? 10A???? ANd could u post the schematic u used for build so good amplifier?

13th October 2003, 08:55 AM	#8
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	The TDA1514A is an excellent chip (praise indeed from a valve/tube man ) I've been using them in products for several years. I've used the Philips circuit, and the results have always been good. Enjoy. Thread moved to Chip Amps Forum.

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