By Tony Kordyban
This well known e-book is a set of myths, blunders, and classes realized from practising engineers fascinated with the sector of digital apparatus cooling. via interesting anecdotes and tales in response to his event at Tellabs Operations, Inc. Tony Kordyban covers easy dimensions of warmth move concepts--mostly from actual difficulties which have been incorrectly solved once or more ahead of an accurate process used to be utilized. The book's 31 chapters, each one on a massive and suitable subject, include easy line drawings to aid illustrate the elemental recommendations, whereas the textual content offers exact and whole technical motives. The book's case research strategy makes it a really important and convenient reference--and Kordyban's transparent and exciting writing type mixes technical subject material with humor and is either iinteresting and instructive
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Additional info for Hot air rises and heat sinks : everything you know about cooling electronics is wrong
Herbie wrote the number on his hand. 1," he said. "Got it. " In October, Herbie came to my office bearing a copy of the Bill of Materials for the PTM. 1 watts per square inch. 12? " He showed me the list of parts for the board, along with their power dissipation. org/about-a "Look, Herb," I said, "why do you bother asking me for these thermal design rules? You don't follow them anyway. These Rules of Thumb are very crude, and so they have to be very conservative. If you are trying to do a really optimal design, they aren't of much use.
They make noise. They fill up the electronics with dust. And then you need a filter to keep the dust out. And if you have one fan, you need two, so that when the first one poops out, you have the spare to keep you going until you can fix the first one. " "That's in the G-D Guidelines? It's just what we in Marketing always say at the design review when somebody says maybe we should put in a fan. They taught me that the very first day, right after they showed me how to wear suspenders properly. " I said, "A guy with the name Joe Blow should probably like fans.
But it is different for different kinds of components. What are these maximum operating limits? Here is one of the big secrets of the electronics industry that is rarely published. Everybody agrees that for every component there is some temperature above which it should never be operated, if you want it to last longer than the warranty period. But every person has a different idea of what that temperature is. The general approach taken by most buyers of electronic components is to ask the vendor to give a temperature limit.