Any spice models for the LM3886 ?

[gaetan8888]

Hello

Is there any reliable spice models for the LM3886 ?

Thank you

Bye

Gaetan

[pacificblue]

http://www.ssguitar.com/index.php?topic=452.msg3250

[gaetan8888]

Hello

Did you try it, how good is that model ?

Thank you

Bye

Gaetan

[Ted205]

how would you go about adding something like that to multisim ?

[pacificblue]

Originally posted by gaetan8888
how good is that model ?

How good do you want it to be? Which aspect is important for the simulation you want to do?

It is basically a copy of the equivalent schematic from the datasheet with a reasonable guess at the current sources. The semiconductors are the standard models, as can be expected, when a model is not from the manufacturer.

What it does:
- The current limiter works, but the thresholds do not seem to be realistic.
- The same goes for the undervoltage protection and the clipping protection.
- The mute pin works, although it needs 1 mA to activate the amp fully as opposed to the 0,5 mA specified in the datasheet.
- It allows you to simulate the filters around the amplifier and the feedback loop's function.

What it does not:
- Show reliable THD results.
- Allow for thermal simulation.
- Simulate the entire functionality of the SPiKe protection system.
- Work on all realistic conditions. Some combinations of values make the simulation very slow or end with an error message.

[gaetan8888]

Hello pacificblue

Thank for your explanation.

Bye

Gaetan