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Old 2nd February 2004, 09:44 PM   #1
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Question Question about bridging TDA 7293

I am planning to build a car amplifier with TDA 7293. For supply I used schematic of SMPS from ESP.
I was wondering if TDA 7293's can be used in modular aplications with more than 3 devices. (4 or 5 for example). Has anyone done it?
I saw that few people have made amps with 3 TDA 7293 (1 master & 2 slave devices).
Does anyone of you good people knows how much undistorted power I can get from 3 TDA 7293 on 4 ohms with +-36V supply ?

Thank You all in advance for any answer given !
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Old 3rd February 2004, 05:18 PM   #2
quekky is offline quekky  Singapore
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Default Re: Question about bridging TDA 7293

Quote:
Originally posted by Cro maniac
Does anyone of you good people knows how much undistorted power I can get from 3 TDA 7293 on 4 ohms with +-36V supply ?
lots of, estimate it to more than 100W at low distortion

the problem with more than 3 ICs is it's not easy to do the routing, even with double-layer pcb
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Old 3rd February 2004, 07:19 PM   #3
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Except the problem with routing, is there any other known problem with doing >3 chips in parallel ?
I saw that You have just finished amplifier with 3 TDA 7293 in parallel. It looks very nice. Is it capable of driving 2 ohm impedance (with how much power on the output ?) ?
For my project, I would need at least 200W on 4 ohms with little distortion, with possibility of driving 2ohms (with more power on 2 ohms than on 4). How many devices do I need to parallel for that ?
Could You advise me which project would be acceptable for my needs, and, is there maybe an easy way to calculate (predict)output power with known number of chips in parallel ?




Regards
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Old 5th February 2004, 03:58 PM   #4
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http://www.stereophile.com/amplifica...63/index7.html

Fig 16 should give u a rough idea
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Old 6th February 2004, 09:10 PM   #5
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Thank You !
That link was very helpful.
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