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Farnell is a global distributor of electronic components, electromechanical products, instrumentation and instrumentation, electronics development and repair tools.
Farnell has a number of benefits that engineers, technologists, developers and procurement personnel will appreciate.
11
Discussion club
Oleg Kabanov Back to the victory of communism?
The best minds in the United States argue over whether capitalism will survive the current crisis. The domestic businessman is more concerned with the fate of his own brainchild. How long will the crisis last? Is the process reversible? How to get through tough times? There are many answers. Which one is closer to the Truth - time will tell.
12
Power electronics
Vladlen Kirilenko New eight-channel current drivers NPO Integral
The task of switching executive devices of various nature under the influence of logic signals of microprocessor devices has many solutions. For example, it can be solved by using integral current drivers, recently mastered in serial production of NPO Integral, Minsk, which this article introduces you to.
14
Power electronics
Alexey Panferov MOSFET in parallel
This article discusses the advantages and disadvantages of parallel connection of MOSFET transistors in key and analog applications. The topic is expanded to show the basic principles of connecting transistors in parallel.
16
Power electronics
Vladimir Bashkirov IRAMxx - intelligent power IGBT modules for a wide range of electric drive applications
Intelligent power modules IRAMxx by International Rectifier are designed for use in mass industrial electric drives and drives of household appliances with a capacity of up to several kilowatts. These devices are especially popular in the manufacture of low power drives. And the favorable efficiency/price ratio makes them very attractive to developers.
20
Power electronics
Andrey Kolpakov New technologies for standard thyristor modules
The modern power electronics market places ever higher demands on the reliability of components. This trend is forcing power module manufacturers to continually introduce new technologies and modernize existing manufacturing processes. This is true even for standard products such as the well-known isolated thyristor diode modules. In 2008, SEMIKRON completely changed the approach to the design of these components, the design of which was developed by this very company more than 30 years ago. The new design reduces the number of solder layers, uses improved chips with an angular gate arrangement, and introduces spring signal connections [1]. The measures taken made it possible to significantly reduce the thermal resistance, increase the permissible current load and improve reliability.
24
Power electronics
Anatoly Savelyev Chokes for filtering harmonics. To save on them or not?
Many faced the problem when it is necessary to choose: is it worth completing the stages of the reactive power compensation installation (RCRM) with chokes if there are problems with the quality of electricity (distortion of the sinusoidality of the current and voltage curve). How to understand the benefits of this, because at first glance, the installation of a choke significantly increases the cost of such a solution? The answer to this question is offered in this article.
27
Power electronics
Alexander Sitnikov Thyristor soft starter for induction motor
The scheme considered in the article allows for bumpless start and braking of the electric motor, increase the service life of the equipment and reduce the load on the power grid. Soft start is achieved by regulating the voltage on the motor windings with power thyristors.
28
Power electronics
Dmitry Klimenkov Application of Vicor modular DC/DC converters in railway transport
The possibility of using modular DC/DC converters from Vicor, which meets the requirements of European standards, in complex rail transport systems is being considered.
31
Power electronics
Sergey Petrov Advanced circuitry of welding inverters
The article provides an overview of publications devoted to the development of the power section of powerful key converters that are used to build welding inverters.
32
Power electronics
Power components: manufacturers and applications
The overview provides data on the types of power semiconductors used in the manufacture of power drives, drive applications, and major manufacturers of power electronics.
42
Power supplies
Evgeny Ostroverkh TDK-Lambda Programmable Power Supplies for Industrial Applications
Standard power supply tasks for equipment are solved using standard power supplies or converters. Another thing is when it is necessary to ensure the operability of the supplied equipment or to accompany the technological cycle of production taking into account the output parameters dynamically changing in time when any other input parameters change. TDK-Lambda offers the Genesys series of programmable power supplies to meet these demanding needs.
52
Power supplies
Dmitry Klimenkov Calculation of the battery charger
Using Vicor's BatMod power source allows you to quickly create a compact and lightweight battery charging system. Output current and voltage levels of the BatMod module are programmable, which is convenient when working with standard input current and voltage values. System design is greatly simplified as BatMod allows voltage and charge current output values to be set independently of each other.
54
Power supplies
Evgeny Vladimirov, Vladimir Lantsov Microprocessor-controlled high-power switching power supplies
The article discusses the main problems and features that arise in the design of modern pulsed secondary power supplies (IVE) of high power. Requirements for the control system for high-power pulse IWE are formulated, which must be taken into account in the control algorithm for such sources. An overview of publications devoted to the control of switching power supplies, including those with microprocessor control, is given. A generalized block diagram of a powerful pulsed IVE (AC/DC converter) with microprocessor control is described. The features of the control algorithm and the requirements for the microprocessor (microcontroller) are considered. The stated provisions and conclusions are illustrated by the example of a pulsed IVE circuit with a power of 1200 W.
55
Power supplies
Jinrong Qian Apply dynamic configuration management to power the system while charging the battery
Lithium ion (Li-Ion) rechargeable batteries are widely used in portable devices, since they have a high specific energy density and the study of the conditions for the effective use of capacity is an important practical task. It is highly undesirable for the charger to fail to complete the charging process or to give the end user a false warning while charging the lithium ion battery. The article discusses the problems of charging completion and safety timer false alarms in the widely used architecture of chargers and systems power supplies. To solve these two problems, Dynamic Power Path Management (DPPM) technology is presented with an example of its implementation. The technology also allows the user to operate the system while charging a heavily discharged battery at the same time.
The author of this article is an Application Development Manager at Texas Instruments, leads the Application Development Department, and is an honorary member of the Handheld Battery Power Technology Engineering Guide.
64
Power supplies
Lev Chemakin New ON Semiconductor Voltage Regulators for Automotive Applications
68
Microcontrollers
Anatoly Shamraev Architecture and programming fundamentals of DSP family C28x from Texas Instruments. TMS320F2812 processor Event Manager event processing module
The article discusses the functionality of the compare, capture and quadrature decoder blocks of the event processing module of the TMS320F2812 processor. Recommendations are given on the use of event processing modules for solving real-time control problems with minimal hardware costs for organizing an interface with sensors and a control object.
70
Microcontrollers
Evgeny Rakhno Microchip microcontrollers: step one
Almost every article that appears in print is aimed at professionals. With this article, we are opening a small series designed specifically for amateurs. We will try to explain to you where to start your acquaintance with Microchip, where to get the necessary software and hardware. We will also show you how to write a simple program, debug it "virtually" and, finally, create a simple device based on the PIC16F886 controller.
78
Microcontrollers
Victor Borsch Oxford Semiconductor in Ukraine
At an unfavorable time from the point of view of doing business, the next wave of redistribution of the market of semiconductor manufacturers began: a wave of acquisitions and mergers. The result of one such transaction is the merger of Oxford Semiconductor and PLX Technology. The latter is a well-known, large company. And OxfordSemi is little known. We will talk about it.
81
Optoelectronics
Artem Kozlov How to power LED lighting fixtures?
As you know, in order to achieve the maximum effect of the operation of LED devices, they need to be supplied with a constant current. For this purpose, many manufacturers of electronic components offer a wide variety of solutions to this problem.
82
FPGA and BMK
Valery Zotov Practical course of end-to-end design of digital devices based on FPGAs from Xilinx. Part 20
In the twentieth part of the course, the description of the parameters of the configuration sequence formation process for projects developed on the basis of FPGAs with FPGA architecture is completed. The implementation of the processes of generating a configuration bit stream for the designed device and its subsequent loading into the crystal is considered. Provides detailed information on the procedure for generating programming files for configuration ROMs and EPROMs manufactured by Xilinx. The necessary information on the execution of configuration memory programming operations and reverse reading of information from ROM and EPROM is given.
84
Communication systems
Alexander Baev New quad-band GSM modules MC75i, TC65i, TC63i and MC55i, as well as LGA modules from Cinterion (Siemens)
The attention of developers to the technology of wireless data transmission over GSM networks is not only not weakening, it is becoming more and more intense, because the GSM standard is popular all over the world. It is for this reason that huge investments are being made in the development of GSM technology: the demand for wireless data transmission devices is growing every day. Even such a well-known and successful corporation as Siemens has singled out the wireless direction, creating the company "Cinterion Wireless Modules". Its headquarters are located in Munich, Germany, and development teams are located in two countries - Germany (Berlin) and Poland (Wroclaw). According to the chairman of the board of directors of the new company, in the next four years Cinterion will produce most of the Siemens WM product range. "
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Discrete components
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