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PDF Simplified Design of Switching Power Supplies (EDN Series for Design Engineers)

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Switching regulator theory is described in good detail for the five typical kinds of switching regulator circuits such as: Chapter 2 covers the interesting subject of heat sinks for SMPS.

Simplified Design of Switching Power Supplies - John Lenk - Google Книги

It is often assumed that switching regulators do not require heat sink. Although this is sometimes true in many cases, it may be necessary to use heat sinks for high current switching regulators.


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Switching supplies contain at least one shunt or series transistor that must pass the load current. The power dissipated can be significant and the need for proper design of heat sinks is necessary. Believe it, and here is why. Most data sheets specify components parameters transistors, diodes, rectifiers, ICs, etc. However, most of these parameters change with temperature. Because components rarely operate at the exact temperature shown on the data sheets usually 25C is chosen , it is important to know the parameters at the actual operating temperature.

Simplified Design of Switching Power Supplies

For example, in the case of transistors, the critical parameters that change with temperature are current gain, collector leakage, and power dissipation. A temperature increase, for example, can also increase the current gain of a transistor and hence the possibility of more switching noise being generated. Furthermore, heat sinks introduce parasitic effects into the overall circuit design and such parasitics can affect the current distribution paths of common mode currents which are the major generator of noise.

Therefore, not only is it important to properly design heat sinks to offset the effects of temperature, but also to diminish the effect of parasitics. Chapter 2 covers such topics as thermal resistance, thermal runaway, heat sink ratings, a commercial heat sink selection guide, and calculating heat sink capabilities e. Chapter 3 is devoted to the inductors and transformers used in SMPS. The magnetic components are the greatest source of design problems and design failures in switching supplies. In order to set up a list of libraries that you have access to, you must first login or sign up.

Then set up a personal list of libraries from your profile page by clicking on your user name at the top right of any screen. You also may like to try some of these bookshops , which may or may not sell this item. Separate different tags with a comma. To include a comma in your tag, surround the tag with double quotes. Skip to content Skip to search. Language English View all editions Prev Next edition 2 of 2. Author Lenk, John D. Physical Description xv, p. Series EDN series for design engineers.

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The EDN series for design engineers. Subjects Switching power supplies. Electronic apparatus and appliances -- Power supply -- Design and construction. Switching power supplies -- Design and construction. Circuits Design Contents 1. Switching Power-Supply Basics 2.

Heat Sinks for Switching Power Supplies 3.

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Simplified Design of Micropower and Battery Circuits EDN Series for Design Engineers

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