Category | March

Intelligent Paralleling

Posted on 01 March 2009

      A new approach to paralleling IGBT modules with individual drivers A gate driver for PrimePACKTM IGBTs designed for high item numbers allows optimal driving of single and parallel-connected modules. This makes it possible for the first time to construct converter series with both single modules and parallel-connected IGBTs practically with no additional [...]

High Voltage Semiconductor Switches

Posted on 01 March 2009

      Introducing the 10 kV IGCT chip set for 7.2 kV (RMS) VSI application To allow more simplicity and cost reduction in the design of modern power electronic systems, significant efforts are made to continuously increase the voltage and current capabilities of high power semiconductors. In this article, the improved Safe Operating Area [...]

Protecting PoE Equipment from Overvoltage and Overcurrent Damage

Posted on 01 March 2009

      Thyristor surge suppression devices meet the immunity and test requirements of IEEE 802.3AF standard The evolution of Power over Ethernet (PoE) continues to expand the functionality of Ethernet technology by supplying reliable DC power over the same cables that currently carry Ethernet data. PoE, which is modeled after the technology used by [...]

Symmetrical Boost Concept for Solar Applications up to 1000V

Posted on 01 March 2009

      Multiple input as a new option In a transformerless solar inverter application the symmetry of split supply DC voltages with ground is an important issue. The following concept shows the handling of both the input and the output asymmetry in an MPP booster circuit. By Michael Frisch, Vincotech GmbH, Biberger Str. 93, [...]

Understanding System Loads and Interfacing with Chargers

Posted on 01 March 2009

      System power must not exceed charger power without energy storage Battery charging is a fairly simple concept when considering only a standalone charger for a given input voltage, charge level and pack size. However, charging is often done with a system load, which can complicate charging. This article highlights the potential startup [...]

Want To Dim Your LEDs with a TRIAC Dimmer?

Posted on 01 March 2009

      LEDs simply react a lot faster than conventional bulbs Light dimmers for common bulb based lighting have been around for ages. The most common implementation of such a dimming circuit is based around a TRIAC (TRIode for Alternating Current). By Ernest Bron, Field Applications Engineer, National Semiconductor Europe   Most TRIAC based [...]

Higher Efficiency in Lighting through Primary Side Regulation

Posted on 01 March 2009

      Advantages of High-Brightness Light Emitting Diodes are smaller size, high illumination, longer lifetime and environmental protection Global attention continues to focus on the methods for achieving low power consumption and high efficiency. Lighting represents nearly 20% of the worldwide consumption of electrical resources and advancements in lighting can have a tremendous impact. [...]

Power over Ethernet Moves Forward

Posted on 01 March 2009

      Brains as well as brawn boost efficiency for 25.5-Watt Ethernet Powered Devices To deliver environmentally sound solutions using the latest 25-Watt and higher Power over Ethernet adapters, designers need to take advantage of the intelligent features included in the PoE standard. By Koen Geirnaert, Product Marketing Manager, ON Semiconductor   It’s Good, [...]

Extending the reach of JTAG/Boundary Scan

Posted on 01 March 2009

      PXI based Boundary Scan systems featuring advanced test resources In the recent years, PXI has established its position in the test and measurement industry, especially due to features such as high data transfer rates and small footprint of open, flexible PXI systems. By Mario Berger, GOEPEL electronic GmbH   Still, there are [...]