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Old 12th October 2003, 05:08 PM   #1
MaXiZ is offline MaXiZ  Italy
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Default 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..
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Old 12th October 2003, 06:00 PM   #2
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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,
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Old 12th October 2003, 06:01 PM   #3
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BTW, I think this thread belongs more appropriately to ChipAmps.

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Old 12th October 2003, 06:42 PM   #4
MaXiZ is offline MaXiZ  Italy
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Did it really need so much power? 10A????
ANd could u post the schematic u used for build so good amplifier?
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Old 13th October 2003, 04:16 AM   #5
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Default schematic

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.
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Old 13th October 2003, 04:19 AM   #6
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Default 100w bridge

a bridged 1514A
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Old 13th October 2003, 09:25 AM   #7
mcp is offline mcp  United States
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Default 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
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Old 13th October 2003, 09:55 AM   #8
dhaen is offline dhaen  Europe
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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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Old 13th October 2003, 10:48 AM   #9
mcp is offline mcp  United States
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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.
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Old 14th October 2003, 07:41 PM   #10
MaXiZ is offline MaXiZ  Italy
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Quote:
Though 2.5A is not enough for maximum power output
And what's the optimum supply?
I mean Voltage/Current!!!
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