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EETE JULAUG 2014

MOSFET transistors aim for extreme temperatures X-REL Semiconductor has broadened its XTR2N family of hightemperature MOSFET transistors by introducing two new midpower P-channel and two small-signal P- and N-channel transistors intended for high-reliability, extreme temperature and extended lifetime applications. The mid-power P-channel transistors introduced are divided into two families depending upon the maximum operating voltage. Devices XTR2N0325 and XTR2N0350 are intended for a maximum operation drain-source voltage of -30V, whereas XTR2N0525 and XTR2N0550 can sustain drain-source voltages of up to -50V. In each sub-family, two different transistor sizes, “25” and “50”, are available providing two possible maximum drain currents. The small signal transistors released are the XTR2N0307 30V P-channel MOSFET, and the XTR2N0807 80V N-channel MOSFET. The XTR2N0307 small signal 30V P-channel has an on-state resistance at 230°C of 7Ω, whereas that of the XTR2N0807 small signal 80V N-channel is 9.1Ω, with respective continuous drain currents of 350mA (900mA peak) and 200mA (450mA peak). The devices are able to reliably operate well below and above the -60°C to +230°C (5 years at +230°C) temperature range. The expected lifetime of X-REL Semiconductor parts in a driver application operating at Tj=150°C is over 35 years. X-REL Semiconductor www.x-relsemi.com Recuperation heater offloads battery in electric vehicles The REOHM BWD330 is a high voltage recuperation heater for electric vehicles. Forming an integral part of the vehicle thermal management system, the D330 reduces energy consumption and offers increased cooling efficiency during emergency braking. In conventional fuel engines, any waste heat generated is usually reused to heat the cabin. However, until now electric vehicles have had to use electrical energy for heating both the cabin and the batteries during winter. This has the detrimental effect of diminishing battery life, increasing the running cost and detracting from the potential maximum range. The key barrier to the adoption of electric vehicles has been battery life and range. The BWD330 minimises this dependency on the battery by using the energy generated from the act of braking, which is stored and reused for heating as and when required. Besides improving the energy efficiency, the BWD330 saves space - it occupies 66% less installation space than standard units, claims appliance manufacturer REO UK who developed and produces the recuperation heater. The unit weighs less than 10kg with a rating of 420-450V DC and a maximum braking power rating of 60kW. In the event of drive system failure, the heater unit can discharge the DC link to safely dissipate unwanted power. Reo www.reo.co.uk Trace and edit your ECU calibration data The new CDM Studio software tool from Vector supports efficient editing and management of parameter set files used in ECU calibration. This tool lets users conveniently display, compare and edit calibration parameter values. It supports all commonly used data formats such as ASAM CDF 2.0, DCM, Intel Hex, Motorola-S, PAR and PaCo. This broad support for both traditional and emerging new file formats makes CDM Studio a tool with high flexibility today and into the future. ECU calibrators can also read in parameter set files directly from external tools, such as INCA from ETAS or Vision from Accurate Technologies, and manage them. When performing complex tasks, filters are used to reduce the number of visible parameters. It is easy to set parameter values and merge parameters from different files into new revision levels. Simultaneous comparison of multiple parameter set files gives users an overview of the different parameterization variants. A number of different comparison reports can be quickly generated for post-processing. CDM Studio saves the development status of individual parameters in ASAM CDF 2.0 or PaCo files together with a history of the maturity level. The calibration data files may be saved as M-script or code files (in C or hex format) to enable integration of parameter values into the software development process. Informatik www.vector.com USB data acquisition unit with dedicated 24-bit A/D converters With the DT9826 series, Data Translation offers a USB data acquisition series that features a 24-bit A/D resolution and a high measurement accuracy along with all the advantages of a dedicated A/D converter for each channel as well as galvanic isolation. The modules are available with 4, 8 or 16 analog inputs, each providing sampling rates of up to 41.6 kHz. In combination with the 16 digital I/O channels, two counter/timers and a tachometer input as well as the included QuickDAQ ready-to-measure application software, the series supports a wide variety of portable high-precision measurement applications. The analog inputs, the digital I/O channels and the two counter inputs are galvanically isolated (±500 V) to protect the computer, and can be run simultaneously and synchronously. This allows the acquisition of analog and digital I/O signals from all subsystems at once, even at the full sampling rate. The additional tachometer input can measure rotational speeds and also be used for high-resolution phase measurements between the tachometer input and the A/D samples. All USB modules ship with the QuickDAQ measurement software as well as 32/64 bit drivers for the standard Windows operating systems and a comprehensive range of software tools, such as interfaces for LabVIEW, MATLAB and .NET. Data Translation www.datatranslation.eu 42 Electronic Engineering Times Europe July/August 2014 www.electronics-eetimes.com


EETE JULAUG 2014
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