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EETE FEB 2015

80V Synchronous SEPIC/Inverting/Boost Controller IC with 3 Regulation Loops In today’s modern electronic systems, the need for power conversion circuits that can do more than simply convert one voltage to another is growing. Some systems require a constant current output, or a constant voltage output, others may require the current to flow from input to output or output to input. All of these requirements are in addition to the normal requirements of high conversion efficiency and high operating voltage ranges. LT8710 is a synchronous SEPIC/inverting/boost controller IC with 3 regulation loops which can operate from an input voltage up to 80V. When configured as a SEPIC or boost converter, the output voltage can be set from 1.3V to 80V. When the LT8710 is used in an inverting converter, the output voltage can be set from -0.1V to -80V. Linear Technology www.linear.com Gallium-nitride-on-silicon white LEDs deliver more light Toshiba’s latest high-luminous-efficacy white LEDs output luminous flux surpassing 160 lm. This series of high power LEDs is suitable for use in residential, commercial and industrial lighting applications. The TL1L4 series offers significantly better performance than the preceding TL1L3 series. The TL1L4 series achieves high luminous flux that surpasses 160 lm at room temperature operation. Under conditions of Ta = 85℃, operating current can be driven to 1A and luminous flux is more than 60% greater than that offered by the preceding TL1L3 series. This contributes to improved luminous efficacy and lower power consumption for LED applications. Available in nine colour variations from 2700K to 6500K, the TL1L4 series is built with gallium nitride-on-silicon (GaN-on-Si) wafer technology to create LEDs optimised for both output and energy efficiency. The devices are housed in a 3.5 x 3.5 mm lens package and rated to support an absolute maximum forward current of 1.5A max at Ta<55℃ and Tj<150℃. Hot binning tests for electrical and optical characteristics are conducted at 85℃ and IF=350mA that simulate real-life operating conditions. Toshiba Electronics Europe www.toshiba.semicon-storage.com Color sensor provides highest infrared cutoff characteristics ROHM has developed a color sensor for display-equipped devices such as smartphones and tablets capable of detecting the color temperature, brightness, and RGB components of ambient light. The BH1745NUC uses original infrared removal technology and computing methods to achieve what the company claims is the industry’s highest infrared cutoff characteristics, reducing the effects of infrared rays by more than 10x compared with conventional products. The device enables compatibility with dark (low permeability) optical windows – unlike conventional color sensors that cannot provide accurate detection due to the effects of infrared interference when dark windows are used. In recent years a greater number of smartphones, tablets, and other display-equipped devices have begun to integrate color sensors in order to analyze the RGB components of ambient light for display image adjustment or perform LED backlight dimming based on the surrounding brightness levels. Conventional color sensors require a transparent optical window in order to accurately detect visible (i.e. RGB) light. The design trend in many smartphones and portable devices is to adopt dark optical windows, which although are more stylish make it difficult to precisely detect colors, since less visible light gets through and the light that does permeate gets mixed in with IR rays. ROHM www.rohm.com Safety-critical code verification extended in C++ static-analysis tool PRQA has added functionality in its latest releases of QA·C and QA·C++, including Dataflow, Graphical and Command Line Interfaces, support for Modern C++ features and improved coverage for MISRA C++ and HIC++ Specific upgrades include; Dataflow analysis, enhanced Graphical and Command Line Interfaces, support for the latest Modern C++ language features, and an improved level of coverage for compliance with the MISRA C++ and High Integrity C++ (HIC++) coding standards. The Dataflow engine in both QA·C++ and QA·C can now perform pointer alias modelling on class and structure pointer members. The internal representation of class/structure members has been changed to a form which can be processed more efficiently by the SMT Solver, boosting the speed, depth and accuracy of the analysis. This has also improved analysis of pointer arithmetic and allows full pointer alias modelling of the first level of indirection. Additional enhancements to the cross-platform architecture and updated Graphical and Command Line Interfaces include better integration to IDEs (MS Visual Studio and Eclipse), improved third party component integration to expand the list of supported software languages, plus IPv6 and multi-language support. QA·C++ is a tool for the growing number of development teams that are transitioning to Modern C++ (C++’11 and C++’14). The tool already provides coverage of key new constructs such as rvalue references, variadic templates, user defined literals, the noexcept operator, and many more. The recent addition of extern template, default arguments and extension to this, means that QA·C++ now supports more than 60% of recently added language features. In the latest version of QA·C++ there are also improvements in the support for both MISRA C++ and HIC++ compliance modules, and the level of coverage of the statically enforceable rules has now reached 92% and 87% respectively. PRQA www.programmingresearch.com 40 Electronic Engineering Times Europe February 2015 www.electronics-eetimes.com


EETE FEB 2015
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