LED Power Supply Help

Discussion in 'Do It Yourself' started by ice_cream_man, Apr 7, 2015.

  1. #1 ice_cream_man, Apr 7, 2015
    Last edited by a moderator: Apr 7, 2015
    I also posted this in lights, but thought I may get more reaponse here.  I tried to delete the post, but could not [​IMG].
     
    I need help choosing a power supply.  One of the power supply modules burnt out on my Bysen Helios 420W light.  I sent an email to Bysen from their website www.bsled.com.  Their website still says Merry Christmas, so I am a little nervous.
    \nThe specs are:  input 100-240v 50/60Hz, output 55W PFC >0.9PF.  It powers 2 LED clusters in series, each has 20 3w diodes.
    \nI cannot find a 55w power supply, only 50 and 60.  Should I go with a 50w supply?  I was considering the 50w supply only here.
    \nhttp://www.ebay.com/itm/10W-20W-30W-50W-100W-High-Power-Driver-Power-Supply-LED-Chips-SMD-Bulbs-Light-/141549714451?pt=LH_DefaultDomain_0&var=&hash=item20f5053c13 
    \n\nSuggestions?

     
  2. #2 greenfinger00, Apr 7, 2015
    hey ice cream man, I'm no expert on leds, but the research I've done suggests that your power supply should be 20% more powerful than what the leds require. so a 60w driver will work ok but a 50w wont have enough power to drive the leds at their recommended out put.
    this page may help ya, its for led strips but the principle's the same. you'll find the info near the bottom of the page.
    http://www.ledlightsworld.com/page.html?id=38
     
  3. #3 ice_cream_man, Apr 7, 2015
    Hmmm, my impression was the opposite.  I thought that underdriving the LED to some extent did not decrease performance but greatly extended the LED's life.
     
    Perhaps an enlightened individual can clear this up for us.
     
  4. #4 REALSTYLES, Apr 20, 2015
    The driver should be rated at 60 not 55 foward volts and what amps are the drivers? that plays a lot into the powering factor I make my own lights. I use Cree CXA 3590 and will be making the new CXB's soon
     
  5. #5 REALSTYLES, Apr 20, 2015
    Also a pick of the old driver would help
     
  6. #6 Regving, Sep 11, 2016
    I'm in the same boat and need either to fix the driver or replace the PSU. What did you do to resolve? I was considering replacing with a constant current driver with an output power greater than 55w. Any comments?
     

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