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EETE NOV 2013

Reader O f f er Five wireless battery-free sensor kits to win This month, Farsens is giving away five kits for EEtimes Europe readers to evaluate its FenixVortex, Kineo and X1 wireless, battery free sensor tags. Each kit worth 249€ includes three sensor tags and a USB Flash Drive with the necessary software to test the tags. The wireless battery-less sensors are based on passive RFID technology. These tags are compatible with commercial EPC C1G2 UHF RFID readers and can communicate their unique ID and the associated pressure and temperature data within a 1.5 meter range. Farsens’s proprietary RFID IC supplies and communicates with external sensors by harvesting the RF power emitted by the RFID reader. The FenixVortex is a battery-free UHF RFID tag that is able to continuously measure the instant temperature in the -30 to 85ºC range, with an accuracy of ±2 degrees. The Kineo measures instant acceleration from ±2 g to ±16 g and checks the orientation of a tagged asset, it transmits the data to a reader together with the 96-bit EPC tag identifier, at a 5Hz data rate. The X1 checks the open/closed status of a controlled switch, at 2Hz data rate and can be equipped with several types of connectors for external switches. Farsens www.farsens.com Check the reader offer online at www.electronics-eetimes.com Radiation hardened low-voltage DC-DC converters focus on satellite power systems International Rectifier has introduced the LSO Series of featurerich radiation-hardened (RAD-Hard) low-voltage, single- and dual output DC-DC converter modules for satellite power systems requiring up to 15 years or more of mission life. The LSO Series delivers isolated output voltages from 1.5 V to 15.0 V with typical efficiency performance up to 81 percent and features MIL-STD- 461C CE03-compliant internal EMI filter. The new 30 W modules offer unique functional features that include latch-off output over-voltage protection (OVP) to help prevent damage to the high value digital and analog loads as a result of an over-voltage condition. An adjustable OVP threshold voltage, input current telemetry, and under-voltage lockout (UVLO) with latching mode options are also included. Available in a 3.5x2.5x0.475 inch standard form factor with a low weight under 125 grams, the converters are characterized with total ionizing dose (TID) of greater than 100K Rad(Si), and single event effect (SEE) linear energy transfer (LET) of heavy ions greater than 82 MeV.cm2 /mg. Other key features include 18 V to 40 V input range, magnetically coupled feedback to insure optimum cross-regulation when the loads are unbalanced, remote sense compensation for single output models, and adjustable output voltage. International Rectifier www.irf.com Bidirectional cell balancer maximizes capacity and lifetime of series connected battery stacks Large, series connected strings of batteries are commonly used in electric vehicles, backup power systems and a wide variety energy storage applications. Maximizing the lifetime and ensuring safe usage of such battery stacks requires accurate measurement and balancing of each cells’ state of charge (SoC). Passive, or dissipative, balancing can correct for SoC mismatch due to temperature gradients or cell to cell impedance differences throughout the pack. However, passive balancing cannot compensate for capacity differences that result from cell aging. Cell aging occurs in all cells and occurs at different rates due to the same factors that cause SoC mismatch. Without capacity compensation, the runtime of the battery is limited by the lowest capacity cell in the stack. Active balancers such as the LTC3300 have the ability to correct for SoC imbalance as well as compensate for cell to cell capacity differences. Linear Technology www.linear.com GPRS data gateway simplifies M2M and telemetry applications TRS-Star GmbH has unveiled a smart GPRS gateway which specifically simplifies M2M (machine to machine) and telemetry applications. The central element of the device is a compact quad-band GSM/GPRS communication module which provides the connected end devices with data transmission via the mobile phone network. Application specific data can be transmitted with the help of common protocols such as SMS / PPP / TCP / UDP / HTTP/ FTP / MMS / HTTP/ SMTP and IP-T. The end devices are in turn connected to the smart data gateway using standard digital interfaces. Four digital inputs and also one USB, RS-232 and RS-485 interface respectively are available for this. Due to its universally engineered system architecture, the smart data gateway addresses numerous M2M applications. The open system architecture makes it possible for smaller customer-specific applications and protocols to run directly on the smart GPRS data gateway. An engineering service is available for customer-specific extensions to the application or for the integration of specific protocols. Due to its high degree of flexibility, the TRS-Star smart GPRS data gateway provides an extremely compact and powerful interface between devices and servers. TRS-Star www.trs-star.de 46 Electronic Engineering Times Europe November 2013 www.electronics-eetimes.com


EETE NOV 2013
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