Medium power audio amp chips?

[Ken Finney]

Anyone have recommendations for "newer" audio amplifier chips, something
like the LM383 that National discontinued some years back? Something like 7
Watts, either mono or stereo is what I need.

 

[Michael Black]

"Ken Finney" (kenneth.c.finney@boeing.com) writes:

Anyone have recommendations for "newer" audio amplifier chips, something
like the LM383 that National discontinued some years back? Something like 7
Watts, either mono or stereo is what I need.

If this is just for single-shot, grab a car radio lying around (or buy
one at a garage sale for a few dollars) and extract the audio amp from
it.

Michael

 

[Ken Finney]

"Michael Black" <et472@FreeNet.Carleton.CA> wrote in message
news:cmraus$5t2$1@theodyn.ncf.ca...

"Ken Finney" (kenneth.c.finney@boeing.com) writes:
Anyone have recommendations for "newer" audio amplifier chips, something
like the LM383 that National discontinued some years back? Something
like 7
Watts, either mono or stereo is what I need.



If this is just for single-shot, grab a car radio lying around (or buy
one at a garage sale for a few dollars) and extract the audio amp from
it.

Unfortunately, it is a low volume production and/or a magazine article.

 

[Ken Finney]

"Ken Finney" <kenneth.c.finney@boeing.com> wrote in message
news:I6xon7.FHs@news.boeing.com...

"Michael Black" <et472@FreeNet.Carleton.CA> wrote in message
news:cmraus$5t2$1@theodyn.ncf.ca...

"Ken Finney" (kenneth.c.finney@boeing.com) writes:
Anyone have recommendations for "newer" audio amplifier chips,
something
like the LM383 that National discontinued some years back? Something
like 7
Watts, either mono or stereo is what I need.



If this is just for single-shot, grab a car radio lying around (or buy
one at a garage sale for a few dollars) and extract the audio amp from
it.


Unfortunately, it is a low volume production and/or a magazine article.

I had a person suggest the LM4752. Exactly what I was looking for,
can't believe I didn't find it on my own. I guess I shouldn't search
for parts late at night.

 

[Tim Shoppa]

"Ken Finney" <kenneth.c.finney@boeing.com> wrote in message news:<I6xGt7.6E1@news.boeing.com>...

Anyone have recommendations for "newer" audio amplifier chips, something
like the LM383 that National discontinued some years back? Something like 7
Watts, either mono or stereo is what I need.

TDA2611A is mono and 5W and extremely popular in consumer
gadgets.

LM384 is 5W too.

NatSemi has a pretty good chart if you go to their website
(http://www.national.com/) and look up their "Boomer" (<3W) and
"Overture" (>3W) selection charts.

Some of the newest parts are surface mount only.

If you only have, say, 5V supply and need more than 5W out of an
8 ohm speaker then there are some specialized audio PA chips
that have a small switching power supply on them.

Tim.

 

[Michael Black]

Tim Shoppa (shoppa@trailing-edge.com) writes:

If you only have, say, 5V supply and need more than 5W out of an
8 ohm speaker then there are some specialized audio PA chips
that have a small switching power supply on them.

Tim.

Or, as the case whenever there is limited voltage available, use
a bridged amplifier. Easy to find in car radios, as I pointed out.

Michael

 

[Watson A.Name - \"Watt Su]

"Ken Finney" <kenneth.c.finney@boeing.com> wrote in message
news:I6xGt7.6E1@news.boeing.com...

Anyone have recommendations for "newer" audio amplifier chips,
something
like the LM383 that National discontinued some years back? Something
like 7
Watts, either mono or stereo is what I need.

A guy I know had a low power amp - under ten watts - that he wanted to
repair and I found after looking online that the company no longer made
the chip - sorry. So it's highly advisable to check the datasheet for
the device you're going to use to make sure it's currently in
production. And hopefully will stay in production.

Or else, just build it out of discrete parts. Amps are simple, and if
the amp dies, you can fix it with commonly available parts. If you use
a single amp chip, you're tied to that chip for the future. The way
some manufacturers have addressed this "problem" has been to make the
amplifier circuit into a module, with a standard pinout to connect to
the 'box' it's in. If the amp chip goes obsolete, just discard the
module and put another newer module in, with a newer chip in it. Or a
module with discretes on it. ;-)

Or else, just make the whole amp box disposable. :-O

 

[Jim Weir]

Ya know, I've had that problem with every chip I've designed in since the
venerable uA706 from Fairchild back in the early '70s. They all go obsolete
about ten minutes after you sign off on the design.


I've finally settled on a cookbook PNP-NPN comp-symm output stage with a cheap
low power NPN splitter and an NPN driver in a single LM324 opamp stage providing
gain. Much less cost than a chip (under a buck), damn near drives to the
rail(s) and will never be obsoleted in my lifetime.

I'll send along a pdf if you want...email jim@rstengineering.com


Jim




"Ken Finney" <kenneth.c.finney@boeing.com>
shared these priceless pearls of wisdom:

->Anyone have recommendations for "newer" audio amplifier chips, something
->like the LM383 that National discontinued some years back? Something like 7
->Watts, either mono or stereo is what I need.
->

 

[Ken Finney]

"Tim Shoppa" <shoppa@trailing-edge.com> wrote in message
news:bec993c8.0411100802.7c1ef970@posting.google.com...

"Ken Finney" <kenneth.c.finney@boeing.com> wrote in message
news:<I6xGt7.6E1@news.boeing.com>...
Anyone have recommendations for "newer" audio amplifier chips, something
like the LM383 that National discontinued some years back? Something
like 7
Watts, either mono or stereo is what I need.

TDA2611A is mono and 5W and extremely popular in consumer
gadgets.

LM384 is 5W too.

NatSemi has a pretty good chart if you go to their website
(http://www.national.com/) and look up their "Boomer" (<3W) and
"Overture" (>3W) selection charts.

Some of the newest parts are surface mount only.

If you only have, say, 5V supply and need more than 5W out of an
8 ohm speaker then there are some specialized audio PA chips
that have a small switching power supply on them.

Despite all the election nonsense here, I'm amazed about the
signal to noise ratio on this newsgroup! Thanks.