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Old 23rd January 2004, 09:28 AM   #1
rulezzz is offline rulezzz  Lithuania
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Default lm3886 tda7293 tda1514

if i take tda7293 ,tda1514 bridge and lm3886 what chip would sound better at 80w?And what chip's circuit is easiest to make for 4ohm driver?
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Old 23rd January 2004, 11:43 AM   #2
rulezzz is offline rulezzz  Lithuania
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i heard that lm3886 don't like's 4 ohm and about tda7293 i don't know where to connect mute and standby connection.
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Old 23rd January 2004, 11:50 AM   #3
miguel2 is offline miguel2  Portugal
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TI's OPAs have quite some current drive. Maybe the OPA541 (a bit edgy) or the 549 (more laid back).

BTW, which is the maximum current of the LM3886?

Miguel
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Old 23rd January 2004, 11:54 AM   #4
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The LM3886 is a pretty good sounding chip.

It has no problems driving a 4-ohm speaker. In fact, although it isn't designed for it, I have been able to run a 2-ohm speaker from it. It heated up more, though.

Never tried the other chips. Who makes them?
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Old 23rd January 2004, 12:13 PM   #5
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These guys will probably put out 80W no problem.....
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Old 23rd January 2004, 01:03 PM   #6
macboy is offline macboy  Canada
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Quote:
BTW, which is the maximum current of the LM3886?
The 3886 is spec'd for a maximum current output of 11 A. This is stated in the datasheet under Application Information. Note also the Safe Operating Area curve. which shows the maximum cureent for various collector-emitter voltages (basically the difference between the power supply voltage and the output voltage at any given instant).
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Old 23rd January 2004, 01:12 PM   #7
macboy is offline macboy  Canada
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Quote:
heard that lm3886 don't like's 4 ohm
To the contrary, the 3886 is practically designed for 4 ohms. It is rated to put out more power into 4 ohms than into 8 ohms. The 3875/3876 on the other hand, have a much lower current limit (4 A vs. 11 A for the 3886) and a lower maximum power (heat) dissipation (100 W vs. 135 W for the 3886). The 3886 is a much more robust device than the 3875, and for high-power 4 ohm applications is a better choice.
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Old 23rd January 2004, 02:03 PM   #8
rulezzz is offline rulezzz  Lithuania
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this is tda7294 circuit
but is it possible to use it with tda7293?
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Old 23rd January 2004, 04:33 PM   #9
rulezzz is offline rulezzz  Lithuania
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i looked to lm3886's pdf and found that it can output around 90w at +/- 35 with 4ohm .If somebody used configuration like this please write how it worked(sound,heat output).
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Old 23rd January 2004, 04:56 PM   #10
markp is offline markp  United States
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Originally posted by Hybrid fourdoor
These guys will probably put out 80W no problem.....
At $100+ each they better!!! Why not parallel a few plastic units at $12 each?
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