EDNE September 2012 - (Page 64)

productroundup Digital power module  Ericsson has unveiled the second model in its 32-bit processor-based FRIDA II 3E digital Advanced Bus Converter (ABC) family: the BMR457. The eighth-brick-format BMR457 is suited to applications that require a small footprint, fast response time, tightly regulated intermediate bus voltages and high efficiency. It includes a 32-bit ARM-based digital microcontroller that embeds the advanced ‘Ericsson DC/DC Energy Optimiser’ firmware to ensure best performance at any point of operation from low to high load; it continually optimises switching param- eters to reduce energy consumption. The BMR457 is available in two input voltage ranges: from 36V to 75V, delivering an output power of 264W; and 40V to 60V, delivering 300W. Output voltage can be adjusted in a range of 6.9V to 13.2V via PMBus commands, making BMR457 suitable for Dynamic Bus Voltage operation. The firmware also adds the ability to handle input voltage transients with slew-rates of up to 0.5 V/µsec, while keeping the output voltage within ±10%. The BMR457 offers a typical efficiency of 95.2% and flat curve behaviour from 20% to 100% load. Power Modules, www.ericsson.com/powermodules Ericsson  High-accuracy temperature monitor LTC2996 is a temperature sensor for 2.25V to 5.5V systems that measures a remote diode’s temperature with ±1°C accuracy and its own die temperature with ±2°C accuracy while rejecting errors due to noise and series resistance. The device provides a voltage-proportional-toabsolute-temperature (VPTAT) output, as well as user-adjustable undertemperature and overtemperature alert outputs. No code is required to configure the device. With a 200 µA quiescent current, the device is suited to system thermal control, energy harvesting, desktop and notebook computers, network servers and environmental monitoring. Users can choose to measure internal or remote temperature and adjust the temperature thresholds with resistive dividers. Temperature conversions are updated every 3.5 msec to provide systems with sufficient time to react to alerts. The device includes a 1.8V voltage reference output to share with an external ADC or for generating temperature threshold voltages. In a 10-pin, 3 x 3 mm DFN package, the IC costs $1.95 (1000).  Fast serial SRAMs Microchip has added four serial SRAMs to its range, at high densities and speeds; they also offer 5V operation for automotive and industrial applications. The 512 kb and 1 Mb SPI devices (23A1024, 23LC1024, 23A512 and 23LC512) are in small, 8-pin packages with speeds of up to 80 Mbps over the quad-SPI, or SQI, protocol, providing the zero write-cycle times with very fast data movement needed for offloading graphics, data buffering, data logging, displays, maths, audio, video and other data-intensive functions. Two additional family members, 23LCV512 and 23LCV1024, are suited to non-volatile, unlimited-endurance RAM, via battery backup, with fast dual-SPI (SDI) throughput of 40 Mbps and low active and sleep currents. These serial NVSRAM devices feature high-speed operation without the high pin counts of parallel NVSRAM, and power consumption comparable to FRAM, at a fraction of the price. Use them in meters, black boxes and other data recorders, which require unlimited endurance or instantaneous writes in addition to non-volatile storage. Microchip, Linear Technology, www.linear.com/product/LTC2996 www.microchip.com/get/PT2P  Quad DACs Analog Devices has introduced a series of quad 16- and 12-bit 3V/5V D/A converters in 16-lead 64 EDN EUROPE | SEPTEMBER 2012 www.edn-europe.com http://www.ericsson.com/powermodules http://www.linear.com/product/LTC2996 http://www.microchip.com/get/PT2P http://www.edn-europe.com

Table of Contents for the Digital Edition of EDNE September 2012

Cover
Contents
International Rectifier
Microchip
RS Components
Masthead
Microchip
EDN Comment
Pulse
Analog Devices
Altera
Baker's best
Messe München
Test & Measurement World
Agilent Techno
Digi-key
Bergquist
Advanced power switches boost microhybrid emissions gains
Digi-Key
Image sensors evolve to address Emerging embedded- vision needs
Renesas
Silicon Labs
Digi-Key
Vicor
Power becomes a software issue as smart phones become smarter
IAN
Power : a significant challenge in EDA design
Digi-Key
Mechatronics in Desin
Design Ideas
Product roundup
Tales from the Cube

EDNE September 2012