I am looking for an audio power amplifier chip that has only 4 pins: INPUT, OUTPUT, VOLT, and GROUND. By default, it should work without any external components. It should run on AC power (3 to 24 volts) directly from a half wave AC transformer. It takes analog audio input directly from MP3 players (headphone) or DVD players (line), input impedance is preset. Outputs directly to stereo speakers, around 10 watts RMS at 8 ohms. Internal gain is by default around 20 dB, which can be changed from 1 to 50 dB by changing the value of one optional external resistor. All DC blocking, biasing, hum filtering, passive or active components should be built in. Internally, it should have a class D digital core or very efficient amplifier circuit.
Does this chip exist today?
Does this chip exist today?
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Hi,
No they don't exist as they can't possibly include the power supply
capacitors needed for an AC power supply, so they don't include
the AC rectifier needed for an AC supply either, or any provision
for variable power supply voltage as its not the way to do it.
They don't exist as a chip, but they certainly do exist as class
D modules that run off external DC supplies, the latter having
universal mains AC requirements that output around 12V to 14V.
Its the way its done, standard DC input and variable AC mains supplies.
Its fairly obvious this is the way to go due to car audio systems.
Checkout the Lepai T amp, loads of posts and info on it.
rgds, sreten.
No they don't exist as they can't possibly include the power supply
capacitors needed for an AC power supply, so they don't include
the AC rectifier needed for an AC supply either, or any provision
for variable power supply voltage as its not the way to do it.
They don't exist as a chip, but they certainly do exist as class
D modules that run off external DC supplies, the latter having
universal mains AC requirements that output around 12V to 14V.
Its the way its done, standard DC input and variable AC mains supplies.
Its fairly obvious this is the way to go due to car audio systems.
Checkout the Lepai T amp, loads of posts and info on it.
rgds, sreten.
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Keep looking...
Takes the fun out of DIY if it existed.
The closest thing with decent output power are the BTL chips for cars. chips like the TDA 1558Q (and many similar ones) needs only three film capacitors to work. It still needs a heatsink and DC power.
Takes the fun out of DIY if it existed.
The closest thing with decent output power are the BTL chips for cars. chips like the TDA 1558Q (and many similar ones) needs only three film capacitors to work. It still needs a heatsink and DC power.
I remember a company named ILP used to make power amp modules up to 240watts back in the late 70's to early 80's.
They were quality amps although a bit costly.
I had a friend that had gotten a pair of their 60 or 120 watt units.
The last I knew they were still running some 15 or 20 years later,But it has been at least that long since the last time I had talked to or seen that person.
I was going to get 8 of the 240 watt modules for a total of 1820 watts in a 4 channel setup.
They had both Mosfet and Bipolar versions available and came ready to run with a built in 4" X 4.5" heatsink and 5 connection pins.
Very cool indeed !!!
jer 🙂
They were quality amps although a bit costly.
I had a friend that had gotten a pair of their 60 or 120 watt units.
The last I knew they were still running some 15 or 20 years later,But it has been at least that long since the last time I had talked to or seen that person.
I was going to get 8 of the 240 watt modules for a total of 1820 watts in a 4 channel setup.
They had both Mosfet and Bipolar versions available and came ready to run with a built in 4" X 4.5" heatsink and 5 connection pins.
Very cool indeed !!!
jer 🙂
Even if this did exist, don't you think your pin count is a little low? 🙂
I see 7 pins minimum. Even a mono chip would need 5 pins.
Some headphone amps are getting close, but not close enough, such as the TPA6130A2 from Ti. Have a look at the texas site, they are always coming out with new stuff and now own National, and also Burr Brown.
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ILP do still exist.
Audio Amplifiers – Transformers – ILP Electronics
However their amp modules require 5 connections.
+VE
0V
-VE
for the power supplies
I/P
for the Input
and O/P
for the output
I did use the HY50s for a while but found they were not very reliable.
http://www.ilpelectronics.com/images/pics/HY2006.pdf
Audio Amplifiers – Transformers – ILP Electronics
However their amp modules require 5 connections.
+VE
0V
-VE
for the power supplies
I/P
for the Input
and O/P
for the output
I did use the HY50s for a while but found they were not very reliable.
http://www.ilpelectronics.com/images/pics/HY2006.pdf
Prism Audio modules, same as above, we have a shelf full of blown modules, though we were using them for test set ups and were pretty rough with them. They can be bought from RS components.
Pano:
Good catch. I meant to write "mono" amplifier with 4 pins.
Johnr66:
I disagree that it will take the fun out of DIY. I think this chip will start a new era of DIY audio electronics. It will be so simple that anyone will be able to build their own amp. It will be like the golden era of audio electronics.
Good catch. I meant to write "mono" amplifier with 4 pins.
Johnr66:
I disagree that it will take the fun out of DIY. I think this chip will start a new era of DIY audio electronics. It will be so simple that anyone will be able to build their own amp. It will be like the golden era of audio electronics.
Most of the modules are MONO.
You need the 3 supply pins to obliviate the necessity for a large output capacitor.
You need the 3 supply pins to obliviate the necessity for a large output capacitor.
Can we have the capacitors and rectifiers built inside the chip? A virtual grounding circuit will allow a chip to work on a half-wave (single) AC transformer. Remember the catch phrase from the food industry, "Just add water?" We need an audio chip with the slogan, "Just add power."
Such amps exist , but they are low power items.
For a TDA 7050 , the BTL usage need no external
components if we except the necessary volume pot.
It require an external PS, though..
For a TDA 7050 , the BTL usage need no external
components if we except the necessary volume pot.
It require an external PS, though..
Chips (the actual silicon die) already do contain very small value capacitors, but the larger ones are external. What you are talking about would be a module that has the IC and its external components inside a box, like the voltage converter modules that are available. This can be possible with a class D amp, but it won't be as small as an ordinary IC package.
TDA7050 seems like a great idea. Is there any other similar chip with higher output, perhaps 10 watts?
Thanks for the link !!
I thought that they had went out of bussiness
I now remember that one of my friends modules had went out, But I don't know why or how he was running them.
A little pricey as they were back then, But still $178 for a compact little block that does 300watts at .005% THD isn't to bad for what they are.
Thanks Again !!
jer 🙂
I managed to blow up every module I bought from them ????
That was in my early days but I wouldn't recommend them because of this.
That was in my early days but I wouldn't recommend them because of this.
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