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National Semiconductor Voltage Regulator Handbook 1980
CD 09O VOLTAGE REGULATOR HANDBOOK NATIONAL SEMICONDUCTOR 37 Loverock Road Reading Berkshire RG3 1ED Telephone (0734) 585171 Telex 848370 Celdis Electronic Distributed Speddisto Art ive Components I>ivi*k>n HW VOLTAGE REGULATOR HANDBOOK NATIONAL SEMICONDUCTOR Contributors: Nello Sevastopoulos Jim Sherwin Dennis Bonn George Cleveland James E. Solomon 'National Semiconductor Corporation 2900 Semiconductor Drive, Santa Clara, CalHornla 96051 [4M| 737-5000(TWX (910) 339-92J0 dmertWd: Hatloijl aoafl not «Burri* iny [•itmnslbHlny lor uta at my circuitry »ny no elrsuM pit*nl lictnut *r* implied, «no Nit>snil reimnS the fin.ni. si Sitm wiihaul nolie* to Ch*rv|}t »«> clrcuilry. nw Table of Contents 1.0 Introduction ...... ,,,......,..,, 1-1 1.1 How to Use this Book ., , 1-1 1.2 Features of On-Card Regulation 1-1 1.3 Fixed Voltage 3-Terminal Regulator Description 1-4 1.4 Comparison, Fixed Voltage 3-Terminal vs Variable Voltage Regulators by Application 1-4 2.0 Data Sheet Summary 2*1 3.0 Product Selection Procedures . .3-1 4.0 Heat Flow & Thermal Resistance .4-1 5.0 Selection of Commercial Heat Sink 5-1 6.0 Custom Heat Sink Design ,6-1 7.0 Applications Circuits and Descriptive Information 7-1 7.1 Positive Regulators .7-1 7.2 Negative Regulators 7-5 7.3 Dual Tracking Regulators 7-6 7.4 Adjustable Voltage Regulators 7-20 7.5 Automotive Applications 7*32 8.0 Power Supply Design 8-1 8.1 Scope , ,. , 8-1 8.2 Capacitor Selection 8-4 8.3 Diode Selection 8-4 9.0 Appendix , . -
Hübriidne Toiteallikas
TALLINNA TEHNIKAÜLIKOOL Thomas Johann Seebeck'i elektroonikainstituut Siduselektroonika õppetool Andrey Knyazev Hübriidne toiteallikas DIPLOMITÖÖ Instituudi direktor: prof. T. Rang . Juhendaja: dotsent M. Pikkov . Tallinn 2014 1 Hübriidne toiteallikas Andrey Knyazev Tallinn, 2014 Töö koosneb 44 leheküljest, mille hulgas on 44 jooniseid ja 1 tabel. Töö on kirjutatud inglise keeles. Töö on kirjutatud isiklikult Andrey Knyazev’i poolt, ehk on unikaalne ja ei koosne varem kirjutatud lõputööde lõikudest. Diplomitöö eesmärgiks on välja töötada, koostada ja simuleerida alalispinge regulaatori, mis võimaldab alandada pulsatsioone alla 1mV-ni täiskoormusel. Töö on simuleeritud Multisim 12 programmis, mis annab kuju pingeregulaatori karakteristikutest. 2 Hybrid power supply Andrey Knyazev Tallinn University of Technology, 2014 The diploma work consists of 44 pages, including 44 diagrams and 1 table. The work is written in English. The work is written personally by Andrey Knyazev and is unique, as well as does not consist of previously written diploma works. The main idea of this work is to develop, compile and simulate DC voltage regulator that allows maintaining low voltage ripple at below 1mV. The work is also simulated in Multisim 12 program, that describes overall characteristics of the regulator. 3 Гибридный блок питания Андрей Князев Таллиннский Технический университет, 2014 Дипломная работа состоит из 44 страниц, в числе которых 44 рисунка и 1 таблица. Работа написана на английском языке. Работа написана лично Андреем Князевым и является уникальной, а также не состоит из отрывков ранее написанных работ. Основная цель дипломной работы – разработать, собрать и просимулировать стабилизатор напряжения постоянного тока, пульсации на выходе которого не превышали бы 1мВ. Работа просимулирована в программе Multisim 12, что описывает основные характеристики спроектированной схемы. -
Voltage Regulators
DATASHEET VOLTAGE REGULATORS VOLTAGE REGULATOR CIRCUIT DATA Regulators provide a power source which remains very close to a fixed value, independent of the load placed on it, provided that the current drawn doesn't exceed the rating of the device. Note: The mini- mum and maximum output voltage specifications for fixed voltage reg- ulators indicate the values which can be expected with variations in load on the device. The same specifications for adjustable regulators indicate the range of voltage output which can be achieved through external componentry. Basic 1A regulated circuit with fixed regulator The 78xx series of voltage regulators require the input pin to be at least 2.5 volts above the output voltage. When a bridge rectifier is used, the DC voltage before the regulator is going to be 1.414 x the AC secondary voltage of the transformer. For good regulation ensure FIXED VOLTAGE REGULATORS that there is at least 3 volts on the input pin over and above the output Polarity Output Voltage Max. Output voltage of the regulator. Note the maximum input voltage to the regu- Device Package Type Min Nominal Max Current lator should not exceed 35V. 78L05 TO-92 positive 4.8 5.0 5.2 100mA 78L12 TO-92 positive 11.5 12.0 12.5 100mA 78L15 TO-92 positive 14.4 15.0 15.6 100mA 79L05 TO-92 negative -4.8 -5.0 -5.2 100mA 79L12 TO-92 negative -11.5 -12.0 -12.5 100mA 79L15 TO-92 negative -14.4 -15.0 -15.6 100mA Suggested 5V Supply Schematic 7805T TO-220 positive 4.8 5.0 5.2 1A Boosting current output of voltage regulator 7806T TO-220 positive 5.7 6.0 6.3 1A When more than one amp of current is required there are a number of 7808T TO-220 positive 7.7 8.0 8.3 1A options available. -
Ic Voltage Regulators
IC VOLTAGE REGULATORS A voltage regulator is one of the most widely used electronic circuitry in any device. A regulated voltage (without fluctuations & noise levels) is very important for the smooth functioning of many digital electronic devices. A common case is with micro controllers, where a smooth regulated input voltage must be supplied for the micro controller to function smoothly. You may also like this article on Regulated Power Supply Voltage regulators are of different types. In this article, our interest is only with IC based voltage regulator. An example of IC based voltage regulator available in market is the popular 7805 IC which regulates the output voltage at 5 volts. Now lets come to the basic definition of an IC voltage regulator. It is an integrated circuit whose basic purpose is to regulate the unregulated input voltage (definitely over a predefined range) and provide with a constant, regulated output voltage. An IC based voltage regulator can be classified in different ways. A common type of classification is 3 terminal voltage regulator and 5 or multi terminal voltage regulator. Another popular way of classifying IC voltage regulators is by identifying them as linear voltage regulator & switching voltage regulator. There is a third set of classification as 1) Fixed voltage regulators (positive & negative) 2) Adjustable voltage regulators (positive & negative) and finally 3) Switching regulators. In the third classification, fixed & adjustable regulators are basically versions of linear voltage regulators. Block Diagram of 3 Terminal IC based Voltage Regulator We have given below the block diagram of a 3 terminal IC based voltage regulator. -
Power Semiconductor Highlights
Committed to excellence Power Semiconductor Highlights V3.0 Discretes, Drivers, Switch Mode Power Supply ICs, Voltage Regulators, AC/DC & DC/DC Converters, Power Supplies & Modules Content Introduction/Linecard .........................3 – 5 Power Supplies ............................. 6 – 7 DC/DC & AC/DC Converter Modules ............. 8 – 13 Voltage Regulators ........................ 14 – 19 Switching Regulators ICs .................... 20 – 27 Protected MOSFETs ........................ 28 – 37 Motor Driver ICs .......................... 38 – 45 IGBTs .................................. 46 – 49 Power MOSFETs .......................... 50 – 58 Triacs ................................. 59 – 61 Schottky Diodes & Rectifiers ................. 62 – 67 Modules ................................ 68 – 73 RF / HF Transistors ............................74 Our Product Portfolio Committed to excellence Consult – Know-how. Built-in. Displays Semiconductors & Boards The technical competence from Rutronik Worldwide and individual consulting on the spot: Passive Storage by competent sales staff, application engineers and Components Technologies product specialists. Electromechanical Wireless Components Technologies Components – Variety. Built-in. The product portfolio from Rutronik Wide product range of semiconductors, passive and electromechanical components, storage, displays & boards and wireless technologies for optimum coverage of your needs. Follow us: Logistics – Reliability. Built-in. https://www.facebook.com/rutronik The delivery service from