Tag Archives: LED Lighting

LED Heat Sink family designed in a STAR Geometry; perfect for LED lightbulb applications or any LED circular PCB

Posted on September 16, 2010 by | Leave a comment

Aluminum Heat Sink in STAR geometry The ATS ATSEU-077D-C4-R0 Star LED heat sink is made from light weight aluminum in a cylindrical shape that fits common LED lamp applications. The heat sink’s fins are arrayed in a round, star-like cross section that optimizes thermal performance through radiative cooling to the local air flow. The ATSEU-077D-C4-R0 has a power dissipation of 3W. A flat surface at one end of the heat sink provides a base for direct mounting of LEDs. All heat sinks within the series are RoHS compliant. To learn more as well as how to purchase please visit our site at this link: The ATSEU-077D-C4-R0 STAR LED Heat Sink

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High Power LED Thermal Management in Commercial and Consumer Lighting Applications; 9/23/2010, 2PM EST

Posted on September 10, 2010 by | 5 comments

Why does high power LED thermal management matter?  Excess heat directly affects both short-term and long-term LED light performance. The short-term effects are color shift and reduced light output while the long-term effect is accelerated lumen depreciation and thus shortened useful life. Participants will learn how to diagnose and solve thermal issues in consumer and commercial LED lighting applications.

You can register for our webinar at this link:  LED Thermal Management in Commercial and Consumer Lighting Applications

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ATS LED Thermal Design Services Help You Cool Your Bright LED

Posted on August 17, 2010 by | Leave a comment

ATS has an entire LED thermal design practice dedicated to getting your LED lighting as cool as it is bright. There are some key hallmarks of our service that we think you’d enjoying knowing and they are all in the following presentation. Also, we can manufacture what we or what you design in our state of the art, U.S. based manufacturing.  To talk to our thermal applications engineers on getting some help on your thermal LED design, email us at sales.hq@qats.com, call us at 781-769-2800 or visit our LED Thermal Design Web Site.

[slideshare id=3063610&doc=isdtempandvelocitymeasurementoemboard-100203133354-phpapp02]

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The Seven Factors Affecting LED Operating Temperature and Thermal Design

Posted on July 14, 2010 by | Leave a comment

At ATS we’ve done a good deal of basic thermal analysis and thermal design for LED lighting. While the “bulb” of an LED light is generally cool, the electronics to drive that light, behind the LED, are quite hot. Our engineers have identified seven factors that affect LED operating temperature. Engineers developing heatsinks or other thermal management solutions need to consider these:

  1. Input Drive Current
  2. Binning Variations in forward voltage
  3. Steady state, pulsed or conditioned light output
  4. Operating ambient conditions
  5. The degree of solar irradiation
  6. Thermal path (that is, thermal resistance) from the LED junction to ambient
  7. Wattage Output of the LED(s) per dissipating surface area

All of these are key factors that engineers should consider when developing an LED lamp or LED light display thermal management solution.

For more information on how to design a solid cooling solution for LED, our readers are invited to our LED thermal management webinar being held on September 23rd, 2PM. Click to the following link to register, “LED Thermal Management in Commercial and Consumer Lighting Applications“.

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LED Thermal Management Design: How to decide when it’s worth paying for the lower thermal impedance of an LED’s MCPCB’s dielectric?

Posted on July 1, 2010 by | Leave a comment

EDN has a nice article write up on how to decide when it’s worth paying for the lower thermal impedance? Margery Conner, who covers LEDs, solid-state lighting, alternate energy sources, and sensors on her beat, notes the following in her trailer lead-in:

The thermal characteristics of the metal-clad pc-board (MCPCB) in LED lighting is becoming increasingly important. Back when LED packages had fairly poor thermal impedance numbers, the thermal characteristics of the MCPCB weren’t so important. But today’s packaged LEDs have increasingly good (low) thermal impedance numbers, and as the package’s thermal impedance drops, the thermal impedance of the MCPCB’s dielectric plays a bigger role.

The answer? Well according to Berquist’s Steve Taylor, quoted in EDN’s article, is to “making a quick calculation to determine the LED package’s normalized thermal impedance”. But that’s just the start. Go have a read for yourself to read the rest, it’s a great take and solution on good design for LED thermal management; Here’s the link, “Normalize LED package thermal impedance for optimum thermal design“

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