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Power Supplies for LED Driving, 2nd Edition by Steve Winder

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Chapter 14

Thermal Considerations

Abstract

Chapter 14 looks at efficiency and power dissipation, with calculations to estimate the temperature rise. Heat sinks and methods of cooling are discussed.

Keywords

temperature
thermal resistance
heat sink
fan
cooling
air flow

14.1. Efficiency and Power Loss

People sometime refer to light-emitting diodes (LEDs) as being a cold-light source. This is true in the sense that an element is not heated to thousands of degrees Celsius to produce light. However, LEDs do indeed generate heat and this has been the cause of failure of several designs. As a first approximation, the heat generated is ...

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