lm3886 tda7293 tda1514

rulezzz · 23rd January 2004, 09:28 AM

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?

rulezzz · 23rd January 2004, 11:43 AM

i heard that lm3886 don't like's 4 ohm and about tda7293 i don't know where to connect mute and standby connection.

miguel2 · 23rd January 2004, 11:50 AM

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

soundNERD · 23rd January 2004, 11:54 AM

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?

Hybrid fourdoor · 23rd January 2004, 12:13 PM

These guys will probably put out 80W no problem.....

macboy · 23rd January 2004, 01:03 PM

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).

macboy · 23rd January 2004, 01:12 PM

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.

rulezzz · 23rd January 2004, 02:03 PM

this is tda7294 circuit
but is it possible to use it with tda7293?

rulezzz · 23rd January 2004, 04:33 PM

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).

markp · 23rd January 2004, 04:56 PM

Quote:

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?

23rd January 2004, 09:28 AM	#1
rulezzz diyAudio Member Join Date: Jan 2004 Location: not nessesary	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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23rd January 2004, 11:43 AM	#2
rulezzz diyAudio Member Join Date: Jan 2004 Location: not nessesary	i heard that lm3886 don't like's 4 ohm and about tda7293 i don't know where to connect mute and standby connection.

23rd January 2004, 11:50 AM	#3
miguel2 diyAudio Member Join Date: Jun 2002 Location: Portugal	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

23rd January 2004, 11:54 AM	#4
soundNERD diyAudio Member Join Date: Sep 2003 Location: Illinois	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?

23rd January 2004, 04:33 PM	#9
rulezzz diyAudio Member Join Date: Jan 2004 Location: not nessesary	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).