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Old 13th March 2010, 04:25 AM   #1
kroto is offline kroto  Indonesia
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Default TDA1554Q Bridge-Parallel?

Hello there...

Can we make TDA1554Q in bridge-parallel configuration? as it has 4 internal amp, 2 non-inv, and 2 inv.

I have one of this Chip, and want to use it as sub power amp...

regards.
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Old 13th March 2010, 08:44 AM   #2
pra3718 is offline pra3718  India
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want to use it as sub power amp
TDA1554Q is car amp & can be listen in home environment. The Max power supply is 18V (Single supply). It was my first amp & may not be used as sub-amp. Sub required more power think more than 70v or best split supply 35 +/- minimum. As per my knowledge LM3886/TDA7294/TDA7293/TDA7295 is the best option. < bridge-parallel configuration? > If I am using 18v single power supply any configuration is waste of time & money. Wait for expert's post.
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Old 13th March 2010, 11:27 AM   #3
kroto is offline kroto  Indonesia
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one thing I know from the datasheet is that when bridged it sum one of the non-inv and inv, and no parallel application in there.
do we can bridge-parallel or parallel-bridge this chip?

use these chip as a sub is because of the application, its only in my room, no need a massive power I think. Infact some small 2.1 PC sound system only have about 5Wrms for the sub, with punchy bass..,
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Old 13th March 2010, 03:26 PM   #4
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Theoretically, you could parallel those 2 BTL amps using current sharing resistors on the outputs, but you won't squeeze any more power from the chip compared to BTL configuration unless your speaker is 2 ohms.
pra3718 already gave you good advice.
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Old 14th March 2010, 12:51 AM   #5
kroto is offline kroto  Indonesia
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4R in BTL similar to 2R in each amp isn't?

I alreadx have TDA7294, in fullrange,
adding a small sub to help the bass articulation is a good idea I think.

I will try the BPA configuration latter then, since I'm not quite sure with the internal configuration of the chip...

thank folks...
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Old 15th March 2010, 09:33 AM   #6
pra3718 is offline pra3718  India
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Quote:
adding a small sub to help the bass articulation is a good idea I think
Small sub starts from LONG THROW 8" DRIVER WITH at least MONO LM3886/TDA7294/TDA7293/TDA7295. enclosure size 12"x12"x20" (if no driver parameter available)

Quote:
I alreadx have TDA7294, in fullrange
Reverse the chip.

Fullrange = tda1554q
sub = tda7294
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Old 28th December 2011, 02:28 AM   #7
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Default Can we make TDA1554Q in bridge-parallel configuration? as it has 4 internal amp, 2 no

Quote:
Originally Posted by kroto View Post
Hello there...

Can we make TDA1554Q in bridge-parallel configuration? as it has 4 internal amp, 2 non-inv, and 2 inv.

I have one of this Chip, and want to use it as sub power amp...

regards.


hellow there... the answer is yes. you can bidege-parallel the tda1554..
ok let say you put an input to pin 1 and 2 then at the output pin8 you connect it to pin 17 and 16.. BUT you make sure that you reduce the input voltage from pin 8 to pin 17 and 16 ... the input voltage in pin1 and 2 should be the same as your in put in pin 17 and 16 so you get the perfect phasing of the signal...
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