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
A team from MIT's Computer Science and Artificial Intelligence Lab (CSAIL) has developed a breakthrough new multi-material 3D printer.
The trend to automation development software emphasizing configurable objects, versus structured programming, takes a step forward.
Everyone working in MEMS is chasing the ever-elusive golden wafer. But there is a moral to this story, and help is on the way.
Despite pervasive emphasis on “faster, sooner, better,” companies that have multiple design cycles a year only update their approved vendor lists on an annual basis. Maybe it's time to rethink this.
Taking energy from renewable sources, recycling existing energy, and using components that don’t need much energy at all are becoming critical industrial and consumer design criteria.
More:Blogs|News
Design News Webinar Series
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
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
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 31 - Sep4, Embedded System Design Techniques™ - Writing Portable and Robust Firmware in C
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.
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