HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Feature
Electronics & Test
How Temperature Affects the Performance & Efficiency of LEDs
12/4/2013

< Previous   Image 2 of 4      Next >

Figure 2. Example of luminous flux vs. junction temperature at different current settings.
Figure 2. Example of luminous flux vs. junction temperature at different current settings.

< Previous   Image 2 of 4      Next >

Return to Article

View Comments: Newest First|Oldest First|Threaded View
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
BMW has already incorporated more than 10,000 3D-printed parts in the Rolls-Royce Phantom and intends to expand the use of 3D printing in its cars even more in the future. Meanwhile, Daimler has started using additive manufacturing for producing spare parts in Mercedes-Benz Trucks.
Researchers have been developing a number of nano- and micro-scale technologies that can be used for implantable medical technology for the treatment of disease, diagnostics, prevention, and other health-related applications.
SABIC's lightweighting polycarbonate glazing materials have appeared for the first time in a production car: the rear quarter window of Toyota's special edition 86 GRMN sports car, where they're saving 50% of its weight compared to conventional glass.
Take a look at some of the best movies that include self-aware machines.
An engineer in the United Kingdom has found inspiration in nature for the design of bridges that are far stronger and more durable than current designs.
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jul 11 - 15, Embedded System Design Techniques™ - Debugging Real-time Embedded Software – Hands on
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


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

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service