I want to build the best amp possible, either chip amp or discrete. Problem is I'm limited to power supply. I will use Li-Ion battery of 7v3 1200mA. Any chip/circuit recommendation?
I would use a chip with Rail-toRail output.
Also you should use 4 Ohms or 2 Ohms speakers to get 1 Watt.
It is impossible if you use 8 Ohm.
To build a discrete is very difficult, if you want some 1 Watt output.
It is not impossible, but difficult.
Also you should use 4 Ohms or 2 Ohms speakers to get 1 Watt.
It is impossible if you use 8 Ohm.
To build a discrete is very difficult, if you want some 1 Watt output.
It is not impossible, but difficult.
This one can be used, I think:
OPA567
Operational Amplifier (Op Amp) - Precision Amplifier - OPA567 - TI.com
OPA567
Operational Amplifier (Op Amp) - Precision Amplifier - OPA567 - TI.com
I guess so. Actually I'm limited by the battery, not the watt. I think 0.5W is still loud enough.
Or is it difficult to get an acceptable distortion? From what I have seen using 2 or 3 stage simple transistors, distortion is above 3%. This is too high compared to a chip amp but I don't know soundwise because that is probably second order. Need to try one to know and compare.
Why don't you try my sugestion? TDA2822M is verry cheap and easy to find, it's schematic is simple enough.. few minutes of soldering stuff and thet try it..
Ah, I have plenty of that chip. Yes I will build the bridge version for comparison to get to the best one. Problem was/is there is a difference between the sample schematic and sample PCB, on the feedback arrangement;
and I don't know about bridge amp so I have no idea which one is correct (but I think the schematic is correct). Couldn't find time to ask question about the PDF. Maybe later.
Yes, it was my favorite. I wasn't sure about the battery but now I think it will do. With 7v3 I think I need to zener it at 6v8 or so.
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