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LED driver offers enhanced functionality for front and rear light With LED headlights becoming more and more the standard lighting technology even in the compact and subcompact vehicles class, automotive OEMS and suppliers are focusing on cost effectiveness and versatility for the LED drivers. Now Texas Instruments introduced the automotive industry’s first two-channel switching LED driver for front lights and the only linear LED driver with single short LED detection for rear lights. Plus, TI’s new chips offer multiple dimming options. Unlike other LED drivers in the market, the TPS92630-Q1 and TPS92602-Q1 feature both highside current sense dimming and pulse width modulation (PWM) dimming capabilities, as well as full diagnostic and thermal management, which helps designers create flexible lighting systems that meet many countries’ differing traffic regulations. Key features and benefits of the TPS92630-Q1 for automotive rear lights include single LED short detection and full diagnostic capabilities. This gives designers flexibility to meet different countries’ traffic regulations. The multi-chip fault bus connection supports up to 15 IC connections on one bus and supports easy control logic without an extra microcontroller, which saves valuable board space and cost, compared to previous generations. Thermal current fold-back with programmable threshold prevents LED flickering in thermal shut down situations. Texas Instruments www.ti.com Non-magnetic sapphire trimmer cap aimed at MRI Voltronics has added to its range of non-magnetic trimmer (variable) capacitors; the company claims to have the widest range of such products for Magnetic Resonance Imaging available. V9000 series is the company’s smallest, high voltage trimmer capacitor. The V9000 Sapphire trimmer capacitor is sub-miniature at just 0.64 in. (16.3 mm) (at minimum capacitance) in length, but offers the highest working voltage rating (2 kV) for its size - whilst delivering a capacitance range of 1 to 12pF. Sapphire is ideal for precision trimmer capacitors as its dielectric constant is extremely stable, measuring below 0.0003 up to 10 GHz, and is chemically inert; totally moisture resistant and mechanically strong. These trimmers have a high Q (3000 min at 100 MHz); DC working voltage of 2000V and DC withstand of 3000V. They are also compatible with SAC 305 reflow processing. The V9000 Series is designed for the MRI industry where its size, power, capacitance range and affordability make it the preferred choice for the next generation of coils. Due to the severe non-magnetism requirements this industry requires it employs only materials that exhibit no measurable magnetism - commercial brass and plating materials are not acceptable. Strict traceability and testing regimes ensure this essential parameter. Voltronics www.knowlescapacitors.com 32-bit Arduino platform targets IoT and wearables Arduino and Atmel joined forces to release the Arduino Zero development board, a 32-bit extension of the platform established by Arduino UNO. The Zero board is powered by Atmel’s SAMD21 MCU, which features a 32-bit ARM Cortex M0+ core. The SAMD21 MCU comes with 256kb of flash and 32kb SRAM in a TQFP package. Compatible with a 3.3V Shield that conforms to the Arduino R3 Layout, development with the Arduino Zero using the Arduino programming language is fully supported through a custom developed software library, integrated in the Arduino development environment. The Arduino Zero board also features flexible peripherals and Atmel’s Embedded Debugger (EDBG), which provides a full debug interface on the SAMD21 without the need for additional hardware, significantly increasing the ease-of-use for software debugging. EDBG also supports a virtual COM port that can be used for device programming and traditional Arduino boot loader functionality. Arduino www.arduino.cc Asynchronous SRAM features on-chip error-correcting code SRAM maker Cypress Semiconductor is sampling a 16 Mb fast asynchronous SRAM with error-correcting code (ECC). The on-chip ECC feature enables the new SRAMs to provide the highest levels of data reliability, without the need for additional error correction chips, yielding the lowestavailable soft error rates. The devices ensure data reliability in a wide variety of industrial, military, communication, data processing, medical, consumer and automotive applications. Soft errors caused by background radiation can corrupt memory content, resulting in a loss of critical data. A hardware ECC block in Cypress’s new ssynchronous SRAMs performs all error correction functions inline, without user intervention, delivering lowest Soft Error Rate (SER) performance. The 16 Mb Fast Asynchronous SRAM achieves a 10-nsec access time and is pin-compatible with current Asynchronous SRAMs, enabling customers to boost system reliability while retaining board layout. Cypress has also introduced a new Fast SRAM with PowerSnooze family that combines the 10-nsec access times of Fast SRAMs with low standby power comparable to that of the MoBL family. PowerSnooze is an additional power-saving Deep Sleep mode that achieves 12 μA (typical) deep-sleep current for a 16 Mb SRAM. The 16 Mb Fast SRAM with PowerSnooze also offers on-chip ECC. The 16-Mbit Asynchronous SRAMs are offered in industry standard x8, x16 and x32 configurations. The devices operate at multiple voltages (1.8V, 3V, and 5V) over -40 to +85C (Industrial) and -40 to +125C (Automotive-E) temperature ranges. Cypress www.cypress.com www.electronics-eetimes.com Electronic Engineering Times Europe June 2014 55


EETE JUN 2014
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