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Electronics Cooling

Focused on Thermal Management, TIMs, Fans, Heat Sinks, CFD Software, LEDs/Lighting

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Editorial – Getting Back to Basics

 

As a young engineer in the 1990s, I considered Electronics Cooling magazine as one of the first ports of call as a reference source when venturing into a new area of electronics thermal design. When I was invited to join Electronics Cooling’s editorial team, I re-read the first editorial by Kaveh Azar [1]. He outlined the need at that time (1995) for a publication vehicle that … [Read more...]

Testing of Power LEDs: The Latest Thermal Testing Standards from JEDEC

 

András Poppe, Ph.D.; Mentor Graphics MAD MicReD Unit   The electrical, thermal and optical parameters determining light emitting didoes (LEDs) operation are in a strong, mutual dependence; without knowledge about the parameters in one of these domains the other characteristics cannot be measured correctly. The reliability, useful operating life time and luminous flux are … [Read more...]

Heat Pipe Integration Strategies for LED Applications

 

Dr. Richard Bonner, Anqi (Angie) Fan, Daniel Pounds and Dr. Ehsan Yakhshi-Tafti; Advanced Cooling Technologies, Inc. INTRODUCTION In light-emitting diodes (LEDs), 70 percent to 80 percent of the applied electrical power is converted to waste heat. If this thermal energy is not properly dissipated, the resulting high operating temperatures lead to reduced brightness, shift … [Read more...]

Thin Film Thermal Conductivity Measurement using a Micropipette Thermocouple

 

R. Shrestha, K. M. Lee and T. Y. Choi - University of North Texas D. S. Kim - POSTECH   INTRODUCTION Due to the required experimental characterization complexity for the thermal conductivity measurement of thin films, accurate measurement of such materials has been difficult to achieve for thicknesses less than 1 µm. For example, conventional Fourier heater plate … [Read more...]

Calculating the Heat Dissipation Rate for a Vapor Condenser Heat Sink

 

This article presents an analysis methodology that can be used to calculate the thermal resistance of a vertical downward facing vapor condenser plate-fin heat sink, i.e. a heat sink in which the plate-fins extend downward from a horizontal base into a coolant vapor region and whose function it is to condense this vapor into liquid condensate.  Such heat sinks are used in … [Read more...]

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