mir_as82 Posted August 19, 2009 Report Share Posted August 19, 2009 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 Quote Link to comment Share on other sites More sharing options...
Hero999 Posted August 20, 2009 Report Share Posted August 20, 2009 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 Quote Link to comment Share on other sites More sharing options...
blueroomelectronics Posted August 20, 2009 Report Share Posted August 20, 2009 The OP wants 220VAC in. (based on other forums) Quote Link to comment Share on other sites More sharing options...
Hero999 Posted August 20, 2009 Report Share Posted August 20, 2009 mir_as82,As I'm sure you've been told before, use a wall brick power supply. Quote Link to comment Share on other sites More sharing options...
mir_as82 Posted August 22, 2009 Author Report Share Posted August 22, 2009 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 Quote Link to comment Share on other sites More sharing options...
Hero999 Posted August 22, 2009 Report Share Posted August 22, 2009 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. Quote Link to comment Share on other sites More sharing options...
Damo666 Posted August 22, 2009 Report Share Posted August 22, 2009 Couldn't a wallwart just be used with a led limiting resistor? Quote Link to comment Share on other sites More sharing options...
Hero999 Posted August 22, 2009 Report Share Posted August 22, 2009 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. Quote Link to comment Share on other sites More sharing options...
mir_as82 Posted August 23, 2009 Author Report Share Posted August 23, 2009 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.pdfhow can i find like these products inside?i mean circuit shematic diagram. Quote Link to comment Share on other sites More sharing options...
Hero999 Posted August 23, 2009 Report Share Posted August 23, 2009 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.pdfYes, 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.pdfBuy it, open it up, look at the ICs used, get the datasheets and reverse engineer the PCB. Quote Link to comment Share on other sites More sharing options...
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