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MaXiZ 12th October 2003 04:08 PM

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..

JojoD818 12th October 2003 05:00 PM


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. :D

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

Hope this helps,

JojoD818 12th October 2003 05:01 PM

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


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

2 Attachment(s)
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

100w bridge
2 Attachment(s)
a bridged 1514A :cool:

mcp 13th October 2003 08:25 AM

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

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.


:cop: 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


Though 2.5A is not enough for maximum power output
And what's the optimum supply?
I mean Voltage/Current!!! :)

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