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Old 29th June 2009, 12:10 AM   #1
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Default Any spice models for the LM3886 ?

Hello

Is there any reliable spice models for the LM3886 ?

Thank you

Bye

Gaetan
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Old 29th June 2009, 01:00 PM   #2
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http://www.ssguitar.com/index.php?topic=452.msg3250
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Old 29th June 2009, 02:06 PM   #3
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Hello

Did you try it, how good is that model ?

Thank you

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Gaetan
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Old 29th June 2009, 02:19 PM   #4
Ted205 is offline Ted205  United Kingdom
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how would you go about adding something like that to multisim ?
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Old 29th June 2009, 07:35 PM   #5
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Quote:
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.
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Old 29th June 2009, 09:03 PM   #6
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Hello pacificblue

Thank for your explanation.

Bye

Gaetan
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