LED based lighting is now a very hot topic (believe me, in electronic thermal management circles that used to be funny, the first few times). Control of packaged IC junction temperatures will always have a bearing on reliability but for LEDs thermal also effects functional performance in terms of brightness and colour. The hotter they get, the dimmer they appear. A particular … [Read more...]
Editorial: Looking Back
In the editorial in the fall issue of ElectronicsCooling, my good friend and colleague Clemens Lasance wrote, “It is the privilege of an editor to discuss any subject that comes to mind, as long as it is (remotely) linked to the theme of the journal.” So, as the editor responsible for this issue of the magazine, I want to avail myself of this privilege. As I contemplate what I … [Read more...]
Thermal Facts and Fairy Tales: Heat Sinks, Heat Exchangers and History
As far as history goes, the field of electronics cooling does not have a very long past. A rather quick look through my personal reference material that is strictly geared towards cooling electronics had at the earliest some US Navy documents from the 1950s [1]. Comparing the solution techniques available today to those available then shows that we have both much better tools … [Read more...]
Technical Brief: Design Considerations for High Performance Processor Liquid Cooled Cold Plates
The meteoric rise in cooling requirements of commercial computer products has been driven by an exponential increase in microprocessor performance over the last decade. The conventional way to cool microprocessors has been to utilize air to carry the heat away from the chip, and reject it to the ambient. Air cooled heat sinks are the most commonly used air-cooling devices with … [Read more...]
Calculation Corner: Transient Thermal Modeling of a High-Power IC Package, Part 1
Part II can be found here. There is an increasing need for calculating integrated circuit temperatures during conditions of changing chip power. Varying computer workloads and the implementation of power-saving strategies are leading to greater variability in chip power levels than in the past. As reliability requirements get more stringent there are growing concerns about the … [Read more...]
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