power led drivers circuits?

[mir_as82]

can i ask you a questions?
how can be produced small size power supply? i need small size power led driver circuit as DX-04350V and DX-MU38-5 like these models in link which is given below.
http://www.diox.com.tr/led_suruculeri_01.asp

if anyone helps me so i will be so glad.
Anyone has circuit diagrams for like these product?
Thanks for your kindness

[Hero999]

350mA is quite a lot of current for an LED.

Here's a driver that will do what you want.
http://www.leddynamics.com/LuxDrive/datasheets/3021-BuckPuck.pdf

[blueroomelectronics]

The OP wants 220VAC in. (based on other forums)

[Hero999]

mir_as82,
As I'm sure you've been told before, use a wall brick power supply.

[mir_as82]

But power leds' dinamical resistance are changes by time. if they work much time so their resistance rise. your suggesment s nice but wall wrick power supplies have constant voltage. They have not current feedback. i need constant current feed back power supply.Can you suggest me like this circuits' shamatics? it must be small size. can you look this link?i need a circuit which has AC input.

http://www.em.avnet.com/ctf_shared/sta/df2df2usa/LightSpeed-319-0006.pdf

[Hero999]

I know, I wasn't suggesting you should should use a wall wart on its own, that would be a silly idea. The idea was to use a wall wart in conjunction with the Buck puck driver I suggested previously.

The driver you've suggested looks perfect for powering an LED off the mains, no need for a wall wart.

[Damo666]

Couldn't a wallwart just be used with a led limiting resistor?

[Hero999]

That will work, it certainly has the advantages of being cheap and simple. However it's not regulated and is inefficient as the resistor will wate lots of power.

[mir_as82]

yes hero is right. may be i m lazy so i want to have totally finished circuit:). can i ask you that do professional driver producers use transformers in driver circuits?
forexample is there any transformers in that product.
http://www.em.avnet.com/ctf_shared/sta/df2df2usa/LightSpeed-319-0006.pdf

how can i find like these products inside?i mean circuit shematic diagram.

[Hero999]

yes hero is right. may be i m lazy so i want to have totally finished circuit:).

Then buy a driver and bingo, you have a totally finished circuit.

can i ask you that do professional driver producers use transformers in driver circuits?
forexample is there any transformers in that product.
http://www.em.avnet.com/ctf_shared/sta/df2df2usa/LightSpeed-319-0006.pdf

Yes, the datasheet says it's isolated so there will be a transformer.

However, it's an SMPS so it'll have a small ferrite cored high frequency transformer, not a laminated iron 50/60H power line frequency transformer.

can i ask you that do professional driver producers use transformers in driver circuits?
forexample is there any transformers in that product.
http://www.em.avnet.com/ctf_shared/sta/df2df2usa/LightSpeed-319-0006.pdf

Buy it, open it up, look at the ICs used, get the datasheets and reverse engineer the PCB.