Why is my 445nm laser quickly shutting down on full power?

[DTR]

Minimum voltage is about 5.5V with the P3 but it is not a bad Idea to give yourself a little head room like 6V.

[borgqueenx]

Damn then thats the only driver where i need a own psu for. Anyone knows where i can buy a cheap and small 6-9v psu?

[norty303]

I run my single 445's at 600mW using the 5v supply for the green. I haven't upped the voltage at all. It all depends on just how much power you want out of them

[DTR]

To be a little more accurate I have noted that you need about 1V over the forward voltage of the diode for the P3 to stay in regulation. Here is a chart I did a while back that should give you a rough idea of the minimum voltage you will need. So about 5.1V is possible for around 600mW but for 1W you would probably need about 5.3V minimum but like I said some head room is always nice.

mA@V=mW

400@3.9=249
450@4.0=319
500@4.0=391
550@4.0=450
600@4.1=514
650@4.1=596
700@4.1=646
750@4.1=706
800@4.2=770
850@4.2=816
900@4.2=874
950@4.2=941
1000@4.2=996
1050@4.3=1046
1100@4.3=1077
1150@4.3=1163
1200@4.3=1219
1250@4.3=1268
1300@4.3=1306
1350@4.4=1367
1400@4.4=1434
1450@4.5=1494
1500@4.5=1550
1550@4.5=1597
1600@4.5=1630
1650@4.5=1652
1700@4.5=1670
1750@4.5=1692
1800@4.6=1710

Damn then thats the only driver where i need a own psu for. Anyone knows where i can buy a cheap and small 6-9v psu?

Do you just want just a power brick or a variable current/voltage power supply?

If you just want a brick to power it you could get something like this.
9V-2A
http://www.ebay.com/itm/100-240V-AC-...item4aaa57d21f

[Xytrell]

oh. someone told me from LPF that it needed more then 6v to be operating normally.

I told you more than 5V, because you were trying to run it on 5V at the time.

Is the transistor overheating? How hot does it get? When it cuts out, is there still voltage coming from your supply?

[norty303]

I suspect a picture right now could tell a thousand words...

[borgqueenx]

Thanks DTR, although the problem is i already got a universal power supply where i can say how much voltage i want the flexmod p3 to have.....but its not mountable so its loose in plastic, and taped to the baseplate. So i definatly need a cheap mountable solution.

@norty: why make a photo? That doesnt tell anything?
The cooling block of the P3 is small, but it doesnt get hot. warm...but definatly not hot.