High Power LED Driver/Flasher (150+ Watts)

Discussion in 'The Projects Forum' started by omenhost, Mar 19, 2012.

  1. omenhost

    Thread Starter New Member

    Mar 19, 2012
    Do any of you know of an adjustable switching constant current source driver that can be used to power the Bridgelux BXRA-C8000 LED array?

    Typical current = 2.8A
    Typical forward voltage = 30.4V

    Current range = 1.5-3.75A (5A pulsed)
    Forward voltage range = 27-34V

    The driver needs to have PWM dimming and an external input for triggering/pulsing.

    Luckily I have the luxury of selecting the power source later, so the driver could be DC-DC buck, boost or even 120VAC input (it will be in a vehicle application with large sine wave inverter.) DC power source could be the vehicle's battery or an intermediate regulated power supply at upwards of 48VDC.

    I spent a good deal of time searching for this but I couldn't find anything commercially available that would switch on fast enough.
    The LED will essentially function as a precision strobe, needing to turn on as fast as possible (<1ms) and turn back off after less than 10ms.

    I have not had much experience with LED power electronics but am more than willing to learn. If there isn't anything like this on the market, what general topology would you suggest I look into for building my own.

    Thank you very much for the help.

    P.S. Bonus points if the driver can run multiple BXRA-C8000s
  2. SgtWookie


    Jul 17, 2007
    Hello Omenhost,
    Our Terms of Service is here: http://www.allaboutcircuits.com/l_tos.html

    The relevant paragraph reads:
    As you can see, "Automotive modifications" are considered off-topic, and thus discussion of such topics is not permitted on these Forums. These rules were decided upon by the Owners of the forums, and the rules are not open for discussion nor modification.

    I urge you to abandon the idea of modifying the electrical system of your vehicle. I recommend that you have your vehicle professionally maintained to be in the same configuration as it was when delivered by the dealership, as at that point in time it had to be in compliance with all applicable safety regulations and laws.

    However, if you feel that you absolutely must proceed with your project against my advice, you will need to seek assistance elsewhere. There is a short list of forums that might entertain automotive modification related topics, here:

    In the meantime, feel free to peruse the Forums, and if you have other questions/projects that are not on the restricted list, start a new topic/thread to post about it. I will caution you that information that you may find on this site is not intended for use in a vehicle, or in other situations where human safety may be jeopardized if the circuit fails.
    Bernard likes this.
  3. bertus


    Apr 5, 2008

    As mentioned by SgtWookie, we do not support any automotive projects.

  4. Wendy


    Mar 24, 2008
    Post Closed

    Based on the feedback on this thread on this post I am reopening this thread.

    Please keep in mind our requirements on none automotive circuits are serious.
  5. Wendy


    Mar 24, 2008
    A variation of this might be usable. I am not familiar with your model of buck pucks.

    High Power LED Flasher
  6. mmcap

    New Member

    Mar 21, 2012
    If I understand your post correctly it looks like you are still looking for a power supply to meet your needs. Try vicorpower.com they should be able to fix you up with any power supply you could need. I think one like that will run you about $190 US.