Category | June

Evolution of Power over Ethernet

Posted on 01 June 2006

      The four-pair technique has advantage The IEEE 802.3af standard for Power over Ethernet (PoE) introduced a new facet to Ethernet networking, delivering DC power in tandem with 10/100/1000 Mbps data. PoE brought with it a unique set of problems and new ways of thinking that were unfamiliar to many engineers with experience [...]

Series of Leading-Edge 100-V MOSFETs

Posted on 01 June 2006

       MOSFETs are key-components of power-converters The actual introduced 100-V Technology has low-resistance and fast-switching devices for most efficient power conversion. By Dr. Lutz Görgens, Technical Marketing Engineer, Dr. Ralf Siemieniec, Research and Development Engineer, Power Management and Drives business unit, Infineon Technologies AG   Aseries of 100-V MOSFETs is currently introduced by Infineon [...]

Drive Inverters Simplify the Automated Assembly

Posted on 01 June 2006

       Move of large gearbox components are the task According to VDE regulations, drive inverters not only operate as a control element, but may also be used for motor protection. This is why such a device naturally offers itself as complete motor feeder. By Markus Ingold, Product Manager Standard Drives, Siemens Schweiz AG [...]

Heel Crack and Lead-Free Soldering

Posted on 01 June 2006

       Affecting Power Electronics Packages Experimental and FEA study for the reliability of Al wire during IR reflow. By Lunwen He, Shaohui Pan, LK.Wang and David Wei.Zhang Microelectronic Institute of Fudan University, 220 Handan Road, Shanghai, China and by S.S. Tey and Tiger Wu, Fairchild Semiconductor, Suzhou Corp, 1 Sutong Road, Suzhou, China [...]

Pulsed Power Applications

Posted on 01 June 2006

       Direct Light Triggered Thyristors Direct Light-Triggered Thyristors (LTT) developed by Infineon were designed to withstand the stress of High-Voltage Direct-Current transmission (HVDC) applications. In this kind of application, several LTTs are switched in series connection to ensure a blocking capability for 500 kV DC. By J. Przybilla and U. Kellner, Werdehausen, Infineon [...]

Comprehensive, Low-Cost Monitoring of Standby Batteries

Posted on 01 June 2006

       LEM current transducers also monitor the world’s largest battery Electronic systems for monitoring, analysis and management of stationary battery systems have, until now, been relatively low-tech and costly. By Nigel Scott, Technical and Business Development Manager, LEM   This high pricing, forced by low volumes, has made the return on investment times [...]

Cooling Power Conversion Designs

Posted on 01 June 2006

       The PCB has become a significant thermal path. Power density is increasing rapidly, but assiduous thermal management can help designers meet the many system-level demands at the best possible price. By Nico Bruijnis, European Marketing Manager, The Bergquist Company   With more silicon and more physical channels squeezing onto each circuit board, [...]

Novel Low Leakage Current

Posted on 01 June 2006

       Stable Hiper FREDs The experimentally demonstration of commercially available platinum doped fast switching, area efficient Hiper Fast Recovery Epi-taxial diodes (FREDs) employing low temperature PECVD oxide, single metal field plate and polymide passivation. By J.V. Subhas chandra Bose, Holger Ostmann, and Peter Ingram, IXYS Semiconductor   The experimental findings are consistent with [...]

Battery Authentication Improves Battery Security

Posted on 01 June 2006

      Safety is guaranteed throughout the life of the product The need to power portable devices has opened a huge market for counterfeiters to supply cheap replacement batteries and peripherals. Many of these items may not have the safety and protection circuits required by the OEM. By Jinrong Qian, Texas Instruments   Driven [...]

Harmonic and Flicker Testing

Posted on 01 June 2006

       Meeting the requirements of the EN61000-3-2/3 All designers of electrical or electronic equipment which is intended to be connected to the mains supply need to be familiar with the performance requirements of EN61000-3-2 (harmonics) and EN61000-3-3 (flicker and voltage variations) and the test methods required to ensure compliance. By Malcolm Robinson, Senior [...]