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| High Fidelity audio amp IC for battery powered projects. |
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| jonovid:
what is the best 200Mw audio amp IC for 4 to 6 volt battery powered projects?. without the need for boost converters. I am looking for a high fidelity alternative to the LM386 to drive 8 or 4 ohm 1watt to 200Mw speaker and or up to 30 ohms Headphones. be ether stereo or mono or mono bridged output. either stereo or mono IC is ok. I am looking at a single chip solution here with audio analog input gain up to 200 . this can be SMD , but I prefer DIP packages. will not be damaged by hot-plugging or open circuit at the output when powered up. by disconnecting the speaker swapping out the load or plugging in Headphones must have good high fidelity - low distortion :-+ run from 4 to 6 volts I have some PAM8408 audio amp 8403 PAM8403 stereo filterless Class-D audio amplifier models. :-// they say its 3watt. way more them I need for the job. here is the ic datasheet https://www.diodes.com/assets/Datasheets/PAM8408.pdf |
| tooki:
I’ve tested the PAM 8403 and 8406 (IIRC) amps, and while I wouldn’t call them great, they’re perfectly adequate for non-demanding applications. Just bear in mind that most Class D amps, like these, use differential speaker outputs, and you cannot simply bridge the two negative speaker outputs to create the ground of a headphone jack. You must use a resistor network as shown here: https://www.edn.com/design/analog/4313726/Add-headphones-to-a-Class-D-amplifier I’ve tried that circuit with the PAM amps and it works fine. |
| L_Euler:
I've had really good luck with TI TPA6021A4 2W stereo amplifier chips. |
| JustMeHere:
TI has a whole lineup of very good audio AMPs. ESP32 might be worth looking at. |
| Audioguru again:
You know what an amplifier does when its volume control is set too high? It clips and produces lots of distortion. An LM386 produces fairly low distortion of 0.2% at 200mW into an 8 ohm speaker when powered from 6V. At 10% distortion its output is 325mW so it has 125mW more distortion. Its output into 4 ohms is about the same. A PAM8403 produces 0.08% distortion at 1.2W per channel into an 8 ohm speaker when powered from 5V. At 10% distortion its output is 1.8W into 8 ohms or 3.2W into 4 ohms. |
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