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Modeling >> Semiconductor Devices >> Modeling LED what theory is involve?
https://designers-guide.org/forum/YaBB.pl?num=1049030513

Message started by Dr.Berns on Mar 30^th, 2003, 5:21am

Title: Modeling LED what theory is involve?
Post by Dr.Berns on Mar 30^th, 2003, 5:21am

LEDs has been greatly improving for a couple of years now we have white LEDs and high power resolving LEDs but very little mention or material related to SPICE modeling them. The difficulty is probably the combined electro and optical characteristics i.e. photons,quanrum efficiency with emission intensity with forward cuarrent or forward voltage. Are there any available SPICE library that catalogs LEDs models?[email][/email]

Title: Re: Modeling LED what theory is involve?
Post by FrereTuck on May 13^th, 2003, 8:17pm

When in doubt, Google :)

Here's what I found that may (or may not!) be of any help to you:

http://www.spectrum-soft.com/down/fall2000.pdf

This link has a pretty good explanation of how to model
an LED/Zener Diode etc.

According to them, it's a "simple proposition" (though I have my doubts on whether they consider any real-world effects in it).

Hope this helps..

Title: Re: Modeling LED what theory is involve?
Post by Berns J. Buenaobra on May 17^th, 2003, 8:56pm

Yes, thanks I've looked at the website and it is indeed supersimplistic enough to tell the SPICE user that an LED is a rectifier diode with a minute IS value! But thats just is the problem semiconductor diodes are a lot physically and electrically different! Obviously there are more physics involve in this like establishing a relationship between forward current of an LED with light intensity.Microcap Spectrum modeling solution is not really that coherent. Thanks anyway this things are better done on a physics lab.