Technical Features

October 2014
DC/DC Flyback Converter

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Figure 1: Power stage of the flyback converter (simplified)

Isolated flyback converters often use optocouplers in the feedback loop to regulate the output voltage. As part of the compensation circuit, its parameters such as CTR influence the control loop and must be taken into account in the flyback converter design. The flyback converter is an isolated switching power
Date:
04/01/2024
High performance power systems have now progressed to the point where designers are working with multiple input voltages, driving multiple rails for a wide variety of applications.  With a need to ensure that the PoL regulators are located as close to the load as possible, designers need to pack a lot o
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Date:
10/27/2014

Europe has a rich heritage in the space and aerospace industries, with organisations such as Marconi Space and Science Lab (MSSL), IKI RAN and Centre National d'Etudes Spatiales (CNES) known all over the world. Many factors exist for the on-going success of firms such as these, but a key one is undoubtedly the abi
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Date:
10/26/2014
Power quality events are a common occurrence in industrial facilities and standard “industrial” power supplies typically provide a level of immunity to these events.  The most common events are voltage sags (nearly 50%) followed by voltage transients and short duration overvoltage events or “swells” (a
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Date:
10/26/2014
Simple handheld multimeters often have two inputs for DC current measurements. One input is usually for ranges up to 200mA and the other is for high currents up to 10A or 20A. There is no 2000mA range. So if you need to measure currents in the order of 250mA, you need to use the 20A range, which offers limited ac
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Date:
10/26/2014
Hardware manufacturers are taking advantage of increasing integration and improvements in technology to pack more functionality into a smaller space. In servers and communications switches they are applying the benefits of multicore hardware to provide load balancing and resiliency as well as technologies such as
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Date:
10/26/2014
The “Internet of Things” (IoT), refers to a growing trend to connect not only people and computers, but all sorts of “things” to the Internet, and therefore, each other. By way of example, consider if you will applications such as industrial plants or large infrastructure projects where connecting more se
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Date:
10/26/2014
In October 1983, a record-breaking wind generator was taken into operation and the world’s largest wind energy converter called Growian (artificial German abbreviation meaning large scale wind power plant) went live. The 3MW machine can be considered an example how the world has changed since this happened. Though it was an
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Date:
10/26/2014
There are many factors driving an increased interest in low power semiconductor solutions. Battery-powered products and Internet of Things devices need to ensure a long lifetime to be of use in the consumer markets they target. Energy-harvesting modules, as an alternate source of energy, tend to provide either lo
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Date:
10/26/2014
Consider this near-perfect storm: Many utilities in the United States have some part of their infrastructure that is more than 50 years old and long past its predicted useful life.  In addition, many utility workers are aging and approaching retirement, which means they will soon end their careers and take wi
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Date:
10/26/2014
The use of renewable energy is growing worldwide. Higher numbers of ever more complex systems and installations are leading to a growing need for EMC solutions – especially for new high-power converters. EPCOS components ensure that wind power plants do not introduce interference into the grid. The rotors, g
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Date:
10/26/2014
The latest 4.5kV IGBT/diode chip set from Infineon has been developed and optimized for HVDC applications. It features very low on state voltage losses combined with fast turn on behavior for high current, high voltage and high robust short circuits behavior. High robustness will be demonstrated using HDR technologies for
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Date:
10/25/2014
The efficiency improvement of power converters is one of the major reasons why digital power is becoming increasingly popular. For specific requirements, digital control allows using the best fitted control strategy and comfortable, intricate tweaking of efficiency. This means the power supply can operate in mu
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Date:
10/25/2014
Some portable applications need to be powered up from an external +5V wall adapter supply and still require a +5V system voltage when in battery-backup mode. This design provides a simple method of switching between the external +5V supply and a rechargeable single-cell Lithium-ion (Li+) battery. The design wi
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Date:
10/24/2014
Agip’s Italian electric energy production uses fuel obtained from the mineral oil extraction process that takes place in the Oil Center of Torrente Tona di Rotello, in the province of Campobasso. The electric energy produced here is used to advantage in the national electricity distribution main controlled by
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Date:
10/24/2014
Wireless medical devices are becoming increasingly more prevalent for remotely monitoring and logging vital signs to assist in the detection and treatment of diseases and medical anomalies. An example is shown in Figure 1. Wireless body sensors upload vitals via an Internet hub or personal server such as the pa
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Date:
10/23/2014
Located in North Central Illinois, TriRivers is a healthcare IT organization jointly sponsored by SwedishAmerican Health System in Rockford, Illinois and FHN (formerly Freeport Health Network) in Freeport, Illinois. The collaborative venture provides shared infrastructure and staffing, a regional fiber optic ne
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Date:
10/08/2014
Dell Children’s Medical Center of Central Texas, part of the Seton Healthcare Family in Austin, began construction of a new addition to its 500,000 square-foot medical center in November 2011. The hospital had specific lighting and energy requirements for its new 85,000 square-foot, 72-bed patient tower and ch
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Date:
10/08/2014
It is, by no means, hyperbolic to say that we are on the verge of another revolution. A revolution of the way we leverage modern technologies to access information about our own health conditions. Until only recently, anyone interested in obtaining even the most basic information (blood glucose, heart rate, et
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Date:
10/08/2014
Since the beginning of time medical doctors have looked for better ways to diagnose and treat patients who suffer from internal ailments or injury. The ability to examine and treat patients from within in a minimally invasive way and with the least amount of discomfort has been an important part of medical practice st
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Date:
10/08/2014
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