November 2005 Turning Hot Ideas Into Cool Designs
Thanks to growing component counts, falling board space, and increasing current requirements, effective thermal management has become one of the key challenges facing designers of distributed power architectures in applications ranging from telecommunications base stations to industrial control systems. In particular, a key goal for the designer is to ensure high-efficiency power conversion while achieving a balanced temperature across the PCB. The advent of intermediate bus...
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Carl Blake
, et al.
November 2005 What Is DirectFET Technology?
The schematic in Figure 3 shows the construction of International Rectifier's DirectFET source mounted power-MOSFET technology. As the diagram illustrates, the device is based on a power MOSFET die housed in a copper clip assembly. This MOSFET die has solderable area array gate and source electrode connections on its front surface. The rear surface of the die, which forms the MOSFET drain electrode, is connected to the clip using an electrically conductive adhesive. The clip extends over...
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Paul Whytock
October 2005 MEMS Hitting The Curved Ball
Microelectromechanical-system (MEMS) devices are moving into many fields of industry, providing the basis for novel applications of semiconductor technology in fields as diverse as medicine and high-resolution mobile-phone displays. However, designing MEMS devices is not necessarily a straightforward process for these specialists working with the technology. MEMS is an IC-design discipline that currently has little in the way of support from the large EDA tools vendors, which mainly focus...
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Paul Double
September 2005 Power Perspective
Lambda, the UK-based global power-supply specialist was acquired from Invensys by TDK Corporation of Japan in a deal said to be worth around $235 million. The agreement includes Lambda's entire North American and European operations, as well as Invensys' current 58.2% shareholding in Densei Lambda KK. The deal is expected to create the second-largest power-supply manufacturer in the world, with the largest market share in the industrial power sector by some considerable distance,...
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Paul Whytock
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