Dynex Semiconductor announced the first products in a range of high efficiency, high energy, phase control thyristors (SCRs). The thyristors (SCRs) incorporate process improvements and a new emitter design to achieve all round improved performance. The designs offer up to 30% more current carrying capacity in a given package. The dynamic turn-on and turn-off performance is such that switching losses are significantly reduced. The improved electrical characteristics can be used to reduce cooling system costs or increase the power density of a system. The first release is an array of thirty thyristors (SCRs) ranging in size from 38mm to 88mm and in voltages from 2200V to 8500V. These devices will eventually replace and extend the existing product line. All the products are rated at full repetitive voltage from -400C to 1250C. Samples of the DCR5450W22, DCR4100W42, DCR2270Y65, DCR2400B85 and DCR1840Y85 are now available. The products offer current ratings of 5450A at 2200V through to 1840A at 8500V. All devices are offered in standard ceramic packages. The packages can optionally accommodate internal arc shields for improved case rupture rating. The i2 thyristor (SCR) range will be extended to larger diameters and higher voltages later this year. Dynex Semiconductor Ltd, Lincoln, LN6 3LF, UK.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.