HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Cabe Atwell
User Rank
Blogger
Re: Long Life
Cabe Atwell   1/20/2014 5:37:11 PM
NO RATINGS
I recently purchased a Fenix PD35 850 lumen LED flashlight and it comes with a warning label that it becomes hot to the touch after running on full for a period of time. After that time period comes, the micro-circuitry powers it down to the next highest setting (and so on) in order to prevent damage. Good article on the subject.

Greg M. Jung
User Rank
Platinum
Long Life
Greg M. Jung   12/24/2013 5:37:03 PM
NO RATINGS
Great discussion on the finer points of LED design considerations.  Also, in addition to price drop, in many cases LED's can also offer the advantage of longer life over the other technologies that they are replacing.

mrdon
User Rank
Platinum
Re: Dealing with LED temperature
mrdon   12/22/2013 2:17:25 PM
NO RATINGS
Rob

I agree. This Mentor Graphics LED Thermal/Performance analysis software package would have been great to use when I was developing LED lighting fixtures while working at Hunter Fan. This data would have served as a baseline while taking actual thermal and lumen measurements using an Integrating Sphere. Management of thermal and lumen performance of LEDs is quite a challenge especially when you have to add the SMPS (switching mode power supply) LED drivers heat dissipation data using a per-square inch pcb in to the overall thermal equation. Nice article! 

Rob Spiegel
User Rank
Blogger
Dealing with LED temperature
Rob Spiegel   12/4/2013 10:41:57 AM
NO RATINGS
Nice article on the challenges of working with LED lighting and temperture variances.



Partner Zone
Latest Analysis
Practically all electronic devices today contain metals that may be coming from conflict-ravaged African countries. And political pressures will increasingly influence how these minerals are sourced and used in products.
From desktop to industrial prototypes and products, here are nine of the newest 3D printers from manufacturers across the globe.
Weaned on the relatively effortless connectivity of today’s massive variety of consumer electronic products, automation users in the IIoT will likely not tolerate too many competing, piecemeal standards for long. And the Industrial Internet Consortium is trying to preempt history.
New energy-harvesting switches from ZF Friedrichshafen AG’s CHERRY electronics business unit can eliminate the need for cabling in industrial and other applications.
Professional hackers remotely hijacked a moving Jeep Cherokee -- exposing a life-threatening security bug and setting off a 1.4 million vehicle recall from Fiat Chrysler.
More:Blogs|News
Design News Webinar Series
6/25/2015 11:00 a.m. California / 2:00 p.m. New York
6/24/2015 11:00 a.m. California / 2:00 p.m. New York
6/11/2015 11:00 a.m. California / 2:00 p.m. New York
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 3 - 7, Developing, Testing, and Troubleshooting IPv4 and IPv6 Using Wireshark
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Course August 25-27:
Sponsored by Stratasys
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service