LPF Site Supporter
- Jun 24, 2010
The data projector diodes have a fair amount of headroom so the machine can increase current to compensate and make up brightness as it accumulates hours, likely as it gets warm too, they are really robust and I remember when they used to fail if pushed too far, now they bounce back, but I bet this sharp will pop and go LED like the early projector diodes would.
Yea the Osram diodes are like that.. Take the PLTB450B. It will blow not go into a state like the N!ch!a where it will get to hot to the point that lasing literally shuts down. Think it is due to expansion in the diode but will come back when turned down. The PLTB450B has a 1.2A nominal and 1.6A max. it holds its curve well past 1.8A. Looks like the hard knee comes in around 2A which if you try to set up a unit with 2A it will not last long. I find the osram and sharp diodes are similar or at least compared to N!ch!a or mitsu diodes.
If this is similar then I would think 1.6A is well in the danger zone for this diode but this is only one example.
This is my diodes actual pinout
That is what I would expect as I have never seen a two pin or case neutral three pin with the polarity as described. Probably a typo when editing the datasheet to sell with these diodes.