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Old 13th December 2003, 12:17 AM   #1
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Default Replacements for LM383

A while ago I built an amplifier using a LM383. The sound was quite good for such a simple schematic. I would now like to build 2 of these amplifiers using these chips in bridged mode for pc speakers.

When I searched at national.com, it said they were discontinued. Is there an different chips that can go in place of it and do about the same power output using the same schematic?
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Old 13th December 2003, 01:00 AM   #2
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Hi there,

A TDA2002 8 Watts out or a TDA2003 at 10 Watts these are very similar to the lm383 in the same TO220 package and are still commonly available and there is information on the net for these devices .

Hope this helps

Anthony Kirby
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Old 13th December 2003, 11:05 AM   #3
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Thanks, Anthony, for the suggestions.

Who makes the TDA line of chips?'

Thanks, Mike
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Old 13th December 2003, 01:31 PM   #4
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It's either Phillips or ST...
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Old 13th December 2003, 05:45 PM   #5
Morse is offline Morse  United States
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Hi SoundNerd;

The TDA's are made by ST Microelectronics. FWIW I've got a TDA2030 under construction now, and will post listening experiences when they are available.

However, if you're looking for the LM383, try the NTE 1232. Look it up at http://www.nteinc.com/specs/1200to1299/pdf/nte1232.pdf

My understanding is that it's a drop in replacement, though you'd have to double check the NTE specs to ensure that the pinout and application notes are identical.

Good luck and all the best,
Morse
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Old 8th October 2010, 04:47 PM   #6
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Today I went shopping for LM383s and found TDA2030s are almost half the price of it. I've heard that LM383 consumes more power and generates more heat, but the output is same as TDA2030. So I guess having TDA2030 is much better thank going for LM383, and plz keep in mind that LM383 is well known as a "battery killer"
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Old 8th October 2010, 05:54 PM   #7
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Quote:
Originally Posted by chamath View Post
Today I went shopping for LM383s and found TDA2030s are almost half the price of it. I've heard that LM383 consumes more power and generates more heat, but the output is same as TDA2030. So I guess having TDA2030 is much better thank going for LM383, and plz keep in mind that LM383 is well known as a "battery killer"
Are you sure you are talking about LM383's? They were discontinued a LONG time ago. This is a thread from 2003 and it was started AFTER they were discontinued. If you were shopping for them today, of course they would be pricey, they would be considered a hard-to-find spare. Are you in India or something and speaking about locally produced chips?
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Old 8th October 2010, 06:19 PM   #8
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The LM383s were expensive when they came out!
(And we Americans are preparing to emigrate back to our ancestral homeland.)
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Old 8th October 2010, 08:09 PM   #9
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Quote:
Originally Posted by leadbelly View Post
Are you sure you are talking about LM383's? They were discontinued a LONG time ago. This is a thread from 2003 and it was started AFTER they were discontinued. If you were shopping for them today, of course they would be pricey, they would be considered a hard-to-find spare. Are you in India or something and speaking about locally produced chips?
Well that's a very close guess friend I live in Sri Lanka. I'm pretty sure they were expensive because production is discontinued. The store had 4-5 of them left. I feel kinda lucky to see those old stuff, But if you're really looking to buy one, I've seen some chinese clones of it. But don't expect them to be robust as the original ones.
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Old 19th October 2010, 04:26 AM   #10
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Default Self Destruction

Quote:
Originally Posted by ANTHONY2181 View Post
Hi there,

A TDA2002 8 Watts out or a TDA2003 at 10 Watts these are very similar to the lm383 in the same TO220 package and are still commonly available and there is information on the net for these devices .

Hope this helps

Anthony Kirby
Those LM383/TDA 2002's had a bad habit of self-destructing. They are
great amps, if used properly. They are unconditionally stable up to a
voltage gain of 10. Run them at excessive gain and they will oscillate
at an ultrasonic frequency, over dissipate, and destruct because the
internal protection system can not squelch the uncontrolled oscillation!
I'm pretty sure the TDA2003 is a great sub for the TDA2002. I have a
few that I'll use for that purpose, eventually.
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