Hot Topic:
High-power LEDs

EDN

• Visionaire Lighting’s Solar Vision Pole: shedding light on off-grid lampposts
  
  Author: By Margery Conner, Technical Editor | Date: Nov 26, 2009
  Certain applications justify paying a premium for high efficiency, long life, ruggedness, and light-color-temperature control, and these applications represent the sweet spot for HB LEDs (high-brightness light-emitting diodes).
• Do you know enough about LEDs?
  
  Author: Suzanne Deffree | Date: Sep 22, 2009
  What's happening in the electronics supply chain that will change the way business is done? News Editor Suzanne Deffree looks at environmental regulations, RFID, inventory levels, globalization, distribution, and a host of other issues that influence the electronics supply chain.
• Real-world numbers on production HB LEDs: 32% efficiency
  
  Author: Margery Conner | Date: Aug 31, 2009
  Technical Editor Margery Conner's PowerSource streams the latest developments in electronic power design and related technologies. Follow Margery on Twitter at: http://twitter.com/margeryc.
• Hot/Cold factor holds key to real-world efficacy for HB-LEDs
  
  Author: Margery Conner | Date: Aug 25, 2009
  Technical Editor Margery Conner's PowerSource streams the latest developments in electronic power design and related technologies. Follow Margery on Twitter at: http://twitter.com/margeryc.
• Demo: Soldering an HB LED to its aluminum substrate/heatsink with a heat gun
  
  Author: Margery Conner | Date: Aug 10, 2009
  Technical Editor Margery Conner's PowerSource streams the latest developments in electronic power design and related technologies. Follow Margery on Twitter at: http://twitter.com/margeryc.
• LED inefficiencies: 82% of lighting energy lost as heat
  
  Author: Margery Conner | Date: Apr 13, 2009
  Technical Editor Margery Conner's PowerSource streams the latest developments in electronic power design and related technologies. Follow Margery on Twitter at: http://twitter.com/margeryc.
• Enlightenment on LEDs
  
  Author: By Margery Conner, Technical Editor | Date: Apr 9, 2009
  Practical, inexpensive HB LEDs (high-brightness light-emitting diodes) are here. Now, what can we do with them, and what will be their impact on electronics and consumers?
• Do LED circuit designers dream of electric sheep**?
  
  Author: Margery Conner | Date: Apr 8, 2009
  Technical Editor Margery Conner's PowerSource streams the latest developments in electronic power design and related technologies. Follow Margery on Twitter at: http://twitter.com/margeryc.
• “Sixth sense” device relies on HB LED-based projection
  
  Author: Margery Conner | Date: Mar 25, 2009
  Technical Editor Margery Conner's PowerSource streams the latest developments in electronic power design and related technologies. Follow Margery on Twitter at: http://twitter.com/margeryc.
• Discrete-component buck converter drives HB LEDs
  
  Author: Dhananjay V Gadre, Netaji Subhas Institute of Technology, New Delhi, India; Edited by Martin Rowe and Fran Granville | Date: Mar 5, 2009
  ...efficiencies were 60 to 95% for supply voltages of 6 to 10V. References Saab, Alfredo H, and Steve Logan, “ High- power LED drivers require no external switches,” EDN, July 19, 2007, pg 78. Gadre, Dhananjay V, “Buck regulator...
• Optics keep high-brightness LEDs tightly focused
  
  Author: Margery Conner | Date: Feb 23, 2009
  Technical Editor Margery Conner's PowerSource streams the latest developments in electronic power design and related technologies. Follow Margery on Twitter at: http://twitter.com/margeryc.
• The direction of light
  
  Author: By Margery Conner, Technical Editor | Date: Feb 5, 2009
  Residential and commercial lighting currently accounts for 20% of the electricity used in the United States. Although CFLs are the best options for increasing efficiency and decreasing power needs, HB-LED technology is also making advances. Both technologies have drawbacks, however, and stand to
• Researchers estimate $1.83T savings, massive CO2 emissions reductions from use of LEDs, smart lighting
  
  Author: By Suzanne Deffree, Managing Editor, News | Date: Dec 22, 2008
  ...reduced by terawatt hours, and the financial savings would total $1.83 trillion. For more on LEDs, see EDN's high- power LED Hot Topic page. Further, the two professor estimate carbon dioxide emissions would be reduced by 10.68 gigatons...
• Voices: Avnet LightSpeed’s Cary Eskow: illuminating energy-efficient design
  
  Author: By Suzanne Deffree, Managing Editor, News | Date: Nov 27, 2008
  Cary Eskow is director of LightSpeed, the solid-state-lighting- and LED (light-emitting-diode)-business unit of Avnet Electronics Marketing. A 28-year Avnet veteran, he leads Avnet’s national team of illumination-focused engineers experienced in thermal, drive-stage, and optics design and has
• Study Optical, Electrical and Thermal Design Aspects with LED Lighting Engineering Kit
  
  Author: DEV-monkey Contributing Writer | Date: Oct 24, 2008
  ...variety of components. In addition to an OSRAM OSTAR high- power LED, the kit includes... DEV-monkey Contributing...variety of components. In addition to an OSRAM OSTAR high- power LED, the kit includes several lenses and reflectors...
• Maxim’s MAX16822B EV Kit Drives High-Brightness LEDs
  
  Author: DEV-monkey Contributing Writer | Date: Aug 26, 2008
  Developed for evaluating the MAX16822A/MAX16822B step-down constant-current high-brightness LED (HB LED) drivers, the MAX16822B evaluation kit (EV kit) is configured as a step-down topology for external, user-supplied HB LEDs.
• Maxim’s MAX16822B EV Kit Drives High-Brightness LEDs
  
  Author: DEV-monkey Contributing Writer | Date: Aug 26, 2008
  Developed for evaluating the MAX16822A/MAX16822B step-down constant-current high-brightness LED (HB LED) drivers, the MAX16822B evaluation kit (EV kit) is configured as a step-down topology for external, user-supplied HB LEDs.
• Innovator in blue adapts LEDs for consumers
  
  Author: By Margery Conner, Technical Editor | Date: Jun 26, 2008
  Innovators 2008: As the government phases out incandescent bulbs, John Edmond is betting mercury concerns will steer people toward HB LEDs.
• Distributors look to shine with HB-LED opportunity
  
  Author: By Suzanne Deffree, News Editor, Electronic News | Date: Jun 26, 2008
  HB LEDs (high-brightness light-emitting diodes) hold great opportunity for the electronics supply chain and are particularly attractive to distributors, as the technology will require full-system approaches from suppliers and manufacturers. Analysts estimate that general illumination, signs and
• UV LEDs enable DIY pest control
  
  Author: Margery Conner | Date: Jun 9, 2008
  Technical Editor Margery Conner's PowerSource streams the latest developments in electronic power design and related technologies. Follow Margery on Twitter at: http://twitter.com/margeryc.