Lumiled 1W führte Regler LM317

[MarinBNM]

Tut jemand bilden Leser für den cyan-blauen Film, der 1W verwendet, lumiled das geführte Rot, und LM317 als Regler mit dem 3.3OHm Widerstand im Rückgespräch. Ich möchte Meinung kennen, wie es funktioniert und es gut ist?

[MichaelB]

Arrrgh,

Vielleicht sollten wir die Diskussion auf eine andere Sprache wechseln.

Sonst wird das schwierig. Ich könnte Englisch anbieten.

 

Ich vermute mal das du wissen möchtest ob man eine 1W Diode mit

LM317 und 3.3Ohm Regelwiderstand betreiben kann. Ja.

 

I=1.2V/3.3Ohm=360mA

 

Das sollte passen. Das sieht dann ungefähr so aus wie hier:

http://www.filmvorfuehrer.de/index.php/Bild:Ledreg.png

Nur halt mit dem LM317. Ist sehr beliebt. Gruss,

 

Michael.

[MarinBNM]

OK, english now.

 

What do you mean about LM317?

 

Problem is i can't get LP3864 and LM317 i can!

[MichaelB]

Hi,

Of course you can use LM317. It is basically the same with a bit higher

threshold and higher power capability. So no problem as long as your

input voltage is about 6V or more. You will find all required application

information in the LM317 Datasheet. Happy tinkering,

 

Michael

[Jensg]

You can use any voltage regulator from 5v to 24 v. the only problem is the heatsink an the resistor for the current limiting. even works a combination of resistor, condensator when using the old 6v power supply for the lamp.

jens

[MarinBNM]

I ask about this because i gonna make quick instalation for Vic8 and take it out when couple of films pass.

 

For cyan readers conversation I use SMPS power supply by each projector.

[Jensg]

you will get a problem with less signal output. readjusting for white lamp will be necessary. if dc voltage is nearly rippleless, you can use only a resistor for limiting the led-current. don't forget, you need only 250-350mA instead of 5A of the lamp.

Jens

[MarinBNM]

I did regulator for 1W Lumiled with LM317T, and i put led and LM317 on same heatsink, but problem is that heatsink is heating too much.

 

Can this may be problem or?

 

Input voltage is 9V, should lower input voltage.

 

I get voltage from transformerto greatz with 4700uF capacitor and then to LM317 and led.

[MichaelB]

Hi,

If you overheat the LED it will simply die. So be careful because it is

not so cheap. Just use two different heat sinks.

 

michael

[MarinBNM]

Yes I'm aware of heat problem with led. Problem is that LM317T heats too much? Do you know why?

 

I't delivers 370mA to LED and led working very very good, but LM317T heats too much!

 

Why?

[stefan2]

Install the LM 317 in another place, maybe within your graetz bridge supply on proper heat-sink. Or use the switch mode type, that does not offer the heat problem, but be aware of switcher noise in light spectrum...

 

 

Stefan

[Jensg]

You using 9 volts DC for supply. The Luxeon needs max. 3,3V/330mA=1W. So, the LM317 reduces the Voltage from 9V to 3.3V. 5.7V multiply with 0,33A gives a dissipation power of 1.88 watts. Reducing the supply voltage from 9V to 6V will reduce the dissipation power to 0,9watts.

Jens

[MarinBNM]

I'm gonna put on another heatsink.

 

Also I'm powerin luxeon with 2,7V/380mA = 1W, in datasheet is like this in charts!

[Filmheini]

Hallo,

 

war das aber 'ne schwere Geburt. :shock:

 

Datenblatt bei Fa. Conrad ; Bst.-Nr. 177750 :D

 

Gruss