Front End I News
Ericsson 120A dual-phase DC/DC converter delivers up to 480A in parallel configurations
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ricsson has announced the launch of a new two-phase 120A 3E digital POL DC/DC power module. The BMR467 is pin compatible with its predecessor, the BMR465, but its upgraded design delivers 30A more current. The module is also compliant with new ‘teraAMP’ standard developed by the AMP (Architects of Modern Power) Group. Multiple BMR467 products can easily be connected in parallel to provide loads of up to 480A, which makes it ideal for advanced network processors that require high performance power delivery with advanced software control for improved flexibility. These capabilities also make the BMR467 ready for future Software- Defined Power Architecture (SDPA) systems, which power system architects foresee as the way to achieving highly efficient and energy-optimised network architectures by 2020.
The BMR467 POL converter can be operated as a standalone unit delivering 120A at output voltages from 0.6V to1.8V, an output power up to 216W, as well as being part of a larger power system when processor boards require higher current. Built on a two-phase topology, four BMR467 modules can be connected in parallel together to deliver up to 480A. The BMR467 modules can become part of a multi-module and multiphase (up to eight- phase) power system that enables phase spreading, which reduces peak current and also the number of capacitors required by end systems. The module can easily be configured with support available via the
and is built from the latest generation of power transistor semiconductors, enabling the module to deliver exceptional power efficiency of 93.2 per cent at 12Vin, 1.8Vout at half load. Other device specifications include an MTBF of 10.49 million hours and protection features including input- under-voltage and over-voltage shutdown, output over-current and over- voltage protection, over-temperature protection, and remote control and Power Good pins.
downloadable Ericsson Power Designer software tool. The BMR467 offers automatic digital compensation to provide stability, accurate line and load regulation, and excellent transient performance across a wide range of operating conditions, including switching frequency, input voltage, output voltage and output capacitance. Measuring only 50.8 x 19.05 x 8.2mm in a SIP package, the BMR467 offers power density of 15A/cm3 (250A/in3).
Other key electrical specifications include: output voltage range from 0.6V to 1.8V, adjustable via a pin-strap resistor or PMBus commands; and operation from a 7.5V to 14V input, making the BMR467 ideally suited to operation in distributed power and intermediate bus voltage architectures, which are common in advanced networking, telecommunications, server and storage applications.
In addition, the BMR467 powertrain guarantees high efficiency and reliability
“The BMR467 delivers a high level of flexibility for power system architects, offering 120A as a stand-alone module or up 480A when paralleled with up to four modules,” said Martin Hägerdal, president, Ericsson Power Modules. “Integrating advanced power transistor technologies to provide industry-leading power density, this new point-of-load DC/DC module offers the latest in compensation-free technology as well as delivering superb line-regulation characteristics for modern advanced power applications.” Like its previous family members, the BMR467 has been designed and manufactured by Ericsson to meet the highest standards available in the industry for DC/DC power converters. The device delivers the levels of quality and confidence expected by power system designers to develop reliable long- term and high-performance platforms.
www.ericsson.com/powermodules
Linear Technology demonstrates first wireless battery management system in BMW i3 at electronica Show
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inear Technology, the leading provider of battery stack monitoring ICs for electric and hybrid/electric vehicles, was demonstrating the industry’s first wireless automotive battery management system (BMS) concept car at the Electronica Show. This wireless BMS concept car, developed by Linear’s design partner LION Smart, combines Linear’s highly accurate battery stack monitors with its SmartMesh wireless mesh networking products in a BMW i3, replacing the traditional wired connections between the battery packs and the battery management system. This demonstration of a fully wireless BMS car represents a significant breakthrough that offers the potential for improved reliability, lower cost and weight, and reduced wiring complexity for large multicell battery stacks for electric and hybrid/electric vehicles. Automakers are challenged to ensure the driving public that electric and hybrid/electric vehicles are both safe and reliable. Linear’s road-proven high voltage battery stack monitors deliver industry leading accuracy and reliability, enabling battery management systems that maximise battery pack performance and
6 November 2016
longevity. The LTC6811 is a complete battery measuring device for hybrid/electric vehicles that can measure up to 12 series- connected battery cell voltages with better than 0.04 per cent accuracy. Combining the LTC6811 with Linear’s SmartMesh wireless mesh networking system addresses the persistent reliability issues associated with automotive wiring harnesses and connectors. Field-proven in industrial Internet of Things applications, SmartMesh embedded wireless networks deliver >99.999 per cent reliable connectivity in harsh environments by employing path and frequency diversity. In addition to improving reliability by creating multiple points of redundant connectivity, the wireless mesh network enables additional BMS capability. Wireless connectivity enables more flexible placement of battery modules, and makes possible the installation of sensors in locations previously unsuitable for a wiring harness. Wireless sensors integrated into the SmartMesh network, such as current and temperature monitors, offer the potential for synchronising these measurements with cell voltages.
Components in Electronics Erik Soule, vice
president, signal conditioning products for Linear Technology, stated, “Linear’s innovations in two critical industry leading technologies enables wireless battery management at automotive reliability levels. New
designs of electric and hybrid/electric vehicles are increasing rapidly and all of the major automotive manufacturers are searching for ways to improve the performance and reliability of their battery management systems as they move into higher volume production. The wireless BMS concept car, realised through the expertise of LION Smart’s BMS design, showcases our product vision.” Mr. Daniel Quinger, CEO of LION Smart, stated, “One of our goals in this ambitious project is to demonstrate the improvement in range and charging time that can be achieved by using the latest technologies in partnership with leading global players. Combining Kreisel Electric’s laser welded
18650 modules with direct liquid cooling and Linear Technology’s SmartMesh IP wireless mesh and the LTC6811 battery monitoring IC, together with LION Smart’s Open BMS, enabled a unique battery system with record breaking charge time of just 15 minutes, an energy capacity of over 55kWh, with a range of over 400km. This represents a truly remarkable accomplishment.” The wireless BMS concept car, featuring the BMW i3, shows the promise of wireless technology to significantly improve reliability and simplify the design of automotive battery management systems.
www.linear.com www.cieonline.co.uk
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