Introduction Trends in power electronics systems and devices over the last decade have placed increasing demands on the efficiencies of the thermal management systems used for power Metal Oxide Semiconductor Field-Effect Transistor (MOSFET) and Insulated Gate Bipolar Transistor (IGBT) modules. The pressure to decrease the size of power electronics systems and, subsequently, the … [Read more...]
Thermal Challenges In LED Cooling
Introduction During the last ten years, developments in LED semiconductors have led to an important change in LED applications from that of luminous indicator to that of illuminator. With LEDs now advancing into several lighting fields, LEDs have become one of the standard methods of producing light, joining more traditional sources such as incandescent, fluorescent and … [Read more...]
Exploring the Limits of Air Cooling
Introduction Heat from electronic devices is an integral part of information processing, not a nuisance that can someday be eliminated. This is a physical principle that is independent of the device of information processing. However, when viewed in the historical perspective, the severity of heat problems has not monotonically increased. It came to the fore some time ago, … [Read more...]
Micropumping Technologies for Electronics Cooling
Introduction Traditional cooling approaches, consisting typically of external air-cooled heat sinks, are increasingly falling short in meeting the thermal management challenges of emerging electronic systems. Integrated cooling designs are being investigated to eliminate some of the interface contact resistances introduced by add-on heat sinking and to minimize package … [Read more...]
Indirect Thermosyphons For Cooling Electronic Devices
Nomenclature Variables R Thermal Resistance [°C/W] or [°C-mm2/W] Q Power [W] Q" Heat Flux [W/cm2] T Temperature [°C] or [K] h Heat Transfer Coefficient [W/cm2-K] Subscripts sat saturation tc thermocouple s sink or boiler w wall j junction layer of die a ambient f fluid or saturation c chip surface boil associated with … [Read more...]
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