| NEWS | |
News from the world of electronic components
| 4 |
| Power electronics | |
Yuri Koval
SONIC - a new generation of fast and smooth recovery diodes
IXYS Corporation, a leader in power semiconductors for applications such as power converters and motor control, offers a new generation of ultrafast diodes called SonicFRD. A wide range of maximum reverse voltages from 600 V to 1800 V and currents from 10 to 60 A (in the future from 5 to 250 A), low temperature dependence, very smooth and fast recovery characteristics even at high du/dt are the advantages of SonicFRD diodes over conventional high-speed epitaxial diodes (FRED). | 12 |
| Power electronics | |
Vitaly Shevchenko
International Rectifier Drive Demo Kits
When designing a drive, the developer must select the element base of the control system, protection and power section of the drive. Processor companies have a variety of solutions for controlling various types of motors in their lineup, while offering various development kits. As studies of the documentation of integrated circuits (IC) for the power section of the drive have shown, the development companies, unfortunately, are limited to brief documentation for this product with the main parameters and oscillograms. In this case, it is assumed that the developer must initially understand the features of the application of this type (IS). The article will consider demo kits for the International Rectifier drive, describe their structure and the principle of operation of the main components. | 15 |
| Power electronics | |
Dmitry Klimenkov
New ways of comprehensive protection of electrical circuits
The article deals with overload protection using self-restoring PolySwitch fuses from Raychem, in particular the LVR series, designed for operation in networks with a voltage of 220 V. New products are also considered - PolyZen microassembly for protecting sensitive electronics and elements of the 2Pro series for telecommunication applications. | 22 |
| Power electronics | |
Taras Mysak
Power electronics capacitors
The article gives a brief overview of capacitors produced on the basis of polypropylene films with self-healing properties after breakdown, manufactured by ELECTRONICON Kondensatoren GmbH. | 24 |
| Power electronics | |
Andrey Sanchugov, Vladimir Gutin
Triak is a modern domestic element base for power converting equipment
LLC "Firma TKD" carries out complex supplies of power semiconductor devices of the flagship of the Ukrainian power instrument making LLC "ElementPrevorevatel", which produces a wide range of low-frequency diodes, thyristors, power semiconductor modules and is one of the few enterprises in the world that produces powerful symmetric thyristors (triacs) with bipolar control , which are very effective as regulators and switches in AC power frequency circuits. | 29 |
| Power electronics | |
Yaroslav Beletsky
Dual Channel Audio Amplifier - Stepper Motor Driver
The article describes an interesting possibility of using a D-class amplifier as a stepper motor driver. Using the example of the given circuit solution, the main points of the operation of the MAX9715 microcircuit as a typical representative of new D-class amplifiers are considered. | 31 |
| Power electronics | |
Vladimir Zakharov
Triacs from NXP Semiconductors
The article gives a brief overview of capacitors produced on the basis of polypropylene films with self-healing properties after breakdown, manufactured by ELECTRONICON Kondensatoren GmbH. | 34 |
| Power electronics | |
Alexey Chekmarev
Features of mechanical compression of power clamping semiconductor devices
Clamping power semiconductors are powerful components for controlling the flow of electrical energy. To fully exploit their potential, it is important to select the correct mechanical design for the entire assembly, including hold-down semiconductors, heatsinks, busbars and other components. This article presents some important aspects regarding the mechanical design and operation of the entire assembly using clamping power semiconductors. Recommendations for the mechanical compression of clamping power semiconductor devices are given. | 38 |
| Power electronics | |
Dmitry Berdnikov
Measurement of leakage inductance in transformers of pulse converters using an LRC meter
The author gives a method for determining the coupling coefficient of a two-winding transformer and the parameters of T and U-shaped equivalent circuits from the data of impedance measurements on the primary side of the transformer using a standard LRC meter. For the calculation, the measurement results are used with an open and closed secondary winding of the transformer. | 43 |
| Power supplies | |
Artem Kozlov
Designing a power supply based on the Green FPS controller
The article describes the stages of developing a power supply unit based on the Green FPS power controller. It lists the requirements and discusses how to design an insulated Switch Mode Power Supply (SMPS) with high efficiency and reduced standby power to replace common AC/DC converter designs. The factors influencing the choice of magnetic components are indicated, the criteria for the selection of Green FPS components are indicated, and the RCD fixer with low consumption is developed. The selection of rectifier diodes for the low-voltage DC output circuit and feedback elements in the output voltage control loop completes the design process. Finally, there is a link to a number of available sources to help constructor AC/DC converters. | 48 |
| Power supplies | |
Alexey Oleinik
Features of the national "nutrition"
The article will discuss the most popular series of power supplies (IP) Mean Well on the Ukrainian market and the features of their application. | 54 |
| Power supplies | |
Hartmut Henkel
Dzherela zhivennya on all svitov standards elektromerezh
On the way of globalization, situations often come to light, if the dealers of systems do not know, and in some fences the system itself will be victorious. For an effective test of life in the United States, it is necessary to achieve such a characteristic, as a wide input range, with the appearance of international certificates and a high demand in robots. | 58 |
| Power supplies | |
Evgeny Ostroverkh
Lambda Industrial Power Supplies
High-quality and reliable power supply of equipment is a guarantee of its best and long-term operation. | 60 |
| Power supplies | |
Yuri Skripka
DC/DC converters TRACOPOWER for surface mounting
This article provides brief technical characteristics of TRACOPOWER modular DC/DC converters, which are manufactured in housings for surface mounting on a printed circuit board. | 62 |
| Power supplies | |
Lyubomir Vasylkiv
Guaranteed power supply systems based on resonant converters
This article describes the principle of high frequency resonant conversion used in PowerOne rectifiers, as well as the main advantages of resonant converters over pulse width converters. | 64 |
| Power supplies | |
Nitin Calge, Greg Digert
High frequency power supplies for cars
When designing microcircuits for secondary power systems based on switching converters, it is very difficult to combine the ability to operate at a high conversion frequency with the ability to withstand high voltage. It is possible, however, to design an automotive power converter to operate at high frequency if it is protected from temporary overvoltages. Increasing the frequency of switching converters is becoming more and more important as more and more functions are integrated by electronics in the modern car. This article discusses several ways to protect low voltage electronic circuits from harsh impacts in a vehicle's electrical network. The results of some laboratory tests of immunity to noise in the power supply circuit are also shown. | 68 |
| Measuring technology | |
Evgeny Drok
Oscilloscopes manufactured by Pico Technology Ltd
This article introduces PC-based oscilloscopes from Pico Technology Ltd., which provide an alternative to traditional oscilloscopes. | 74 |
| Measuring technology | |
Alexander Bardakov
Thermal imagers for diagnostics
The article talks about a non-contact method for measuring temperature by infrared radiation. The principles of operation of infrared temperature measuring instruments are briefly stated. The advantages and disadvantages of this measurement method are indicated. A brief overview of the functional capabilities of modern thermal imagers is given. | 78 |
| ADC and DAC | |
Artem Kozlov, Georgy Korolev
Differential measurement methods with deltasigma ADC Linear Technologies. Part 1
Sensors for pressure, load, temperature, acceleration and other physical quantities often operate according to the Wheatstone differential scheme. Such devices can be extremely linear and stable in time and temperature. This article discusses the rational approach for using Linear Technologies' high-bit ADCs when designing measurement devices. | 82 |
| Digital signal processing | |
Robert Kravotta
Choosing the Right Signal Processing Technologies
The number of options for choosing the best processor for embedded system design continues to grow. In addition to microprocessors, microcontrollers and DSPs, several unified microprocessors have been added from companies such as Analog Devices, Infineon, Microchip, and Freescale [1]. These programmable devices provide a unified processor architecture that combines the properties of microcontrollers and DSPs to provide the best combination of control and processing functions in a single machine instruction. More recently, new silicon devices and more mature embedded system design tools have become available that better match the power of programmable logic with custom software algorithms to speed up signal processing [2, 3]. | 86 |
| Engineering practice | |
Determination of states of an isolated digital circuit without power consumption
Using a simple circuit based on a small transformer and a latching comparator, you can determine the state of a digital circuit without drawing power from it. | 92 |
| Engineering practice | |
Mark Chernozhukov
The main methods of suspension and fixation of the rotor in fans for cooling the electronic equipment
There are many fans on the market today with different characteristics: dimensions, performance, etc. At the same time, even outwardly identical models can be made with plain or rolling bearings, and the most modern ones with a new Vapo bearing in combination with Magnetic Levitation Systems. It is about the main characteristics of these structures that will be discussed in this article. | 94 |
| Engineering practice | |
Case Curtis
Reducing the power consumption of devices with direct power supply from the mains
Control devices powered directly from the mains (without a step-down transformer) are forced to use all possible tricks to save power dissipation in order to efficiently supply low-voltage components. The very insignificant 50 mW required for the control section to operate may require a dissipation of 2 to 3 W from the power supply. The need to remove this amount of heat leads to an increase in the cost of the product. However, a few clever design ideas and the latest generation of low-power microcontrollers (MCUs) can lead to significant reductions in heat generation and improved efficiency for direct-powered devices. | 96 |
| Passive components | |
Diversity and versatility
EPCOS designs and manufactures a wide range of ferrite materials. They meet all the requirements for such products in communication networks and energy. Due to the high saturation magnetic induction, low losses and high temperature stability of these materials, effective chokes for power supplies can be developed on their basis. And the low distortion and stability of the ferrite parameters when the frequency changes are properties that are vital for communication systems. | 98 |
| Piezo technology | |
Eduard Lobach
SJK SMD crystal oscillators - finding a compromise
Miniature quartz oscillators appeared on the Ukrainian market relatively recently. This article lists the main advantages and disadvantages of this product. | 100 |
| Electromechanical components | |
Lilia Shevchenko
Industrial connectors manufactured by Tyco Electronics HTS
The HTS company is located in Neunkirchen (West Germany). It was founded in 1956. Since 1976, it has worked closely with the famous American company AMP and in 1996 became its division. In 1999, AMP, together with its divisions, became part of the Tyco Electronics concern. The HTS company specializes in the production of industrial connectors for mechanical engineering, railway transport, shipbuilding and the food industry. The article discusses the features and main characteristics of industrial HTS connectors. | 102 |
| INDUSTRIAL PC | |
Alexander Perevalov, Vladimir Titarchuk
Industrial PCs for 500 euros or market evolution
An industrial personal computer differs from an office PC in terms of reliability, compatibility, configurability, and a long product life cycle. This article discusses the main form factors (the word "basic" refers to the most popular) industrial PCs. The bias was made on the lowest-cost line that appeared on the market in the first quarter of 2007. | 106 |
| Book novelties | |
New books
| 110 |
| Exhibitions | |
Exhibitions
| 112 |
| Business card CHIP NEWS Ukraine | |
Business cards
| 122 |
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