lm386 m-82 output value?

[d4n13l]

Hi guys,
I want to try the lm386 N-4 which has 1W output however were I live I can only find the lm386 m-82 which does appear on the datasheet.. I can find this version online but not its datasheet, does anyone knows its output or its equivalent (N-1, N-3, N-4)?

[Zero999]

I don't know. An educated guess would be it's the same as the LM386N-1

What power supply voltage are you intending to use? The LM386N-4 can only drive a higher powered load because it has a higher maximum power supply voltage rating. Given the same voltage the LM386N-4 can't output any more power than the LM386N-1.

If you want more power, then there are better, more modern amplifier ICs.

[d4n13l]

I'm not worry much about the input voltage right now, I'm just starting to experiment with audio amplifiers and want to see how loud could the volume get with this IC... could you recommend some of these better ones?

[Zero999]

I'm not worry much about the input voltage right now, I'm just starting to experiment with audio amplifiers and want to see how loud could the volume get with this IC... could you recommend some of these better ones?

The maximum output power is proportional to the square of the input voltage. The theoretical maximum RMS output power, when outputting a sinewave, is given by the following formula:

P = V²/(2R)

In real life, it's lower, thanks to the voltage drop in the output transistors.

There are lots of audio amplifier ICs. So many that I can't recommend one to you, without knowing what your requirements.

[Audioguru]

With a 9V supply, an LM386 can produce a maximum of 0.45W into an 8 ohm speaker with low distortion. 0.45W is not loud.
Some audio amp ICs can drive 4 ohm speakers for double the output power. Driving a 4 ohm speaker an LM386 simply produces more heat, not more output power.
Some audio amp ICs are bridged with two amplifiers that effectively almost double the output voltage swing resulting in about 3.5 times the power of an ordinary LM386 amp.

[danadak]

http://www.ti.com/lit/ds/symlink/lm386.pdf

http://amplifiercircuit.net/low-voltage-bridge-audio-amplifier.html

[Audioguru]

No. The website ampifiercircuit.net did not read the datasheet for the LM386 and do the calculations so they claimed 3.5W!

The datasheet for the LM386 amplifier does not show it bridged with a 12V supply and a 4 ohm speaker because it calculates to an output power of only 0.76W with high distortion (0.6W with low distortion) and 1.25W of heat (the maximum allowed heating) in each LM386.