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Ericsson's bus converter saves PCB space

Posted: 15 May 2013     Print Version  Bookmark and Share

Keywords:Ericsson  bus converter  BMR456-SI  BMR456-PI  ICT 

Ericsson has unveiled the BMR456-SI that is based upon the FRIDA II platform. According to the company, both the surface-mount BMR456-SI and the through-hole BMR456-PI quarter-brick Enhanced Performance, Energy Management and End-user Value (3E) advanced bus converters offer unprecedented performance to system architects that are developing equipment for information and communication technology (ICT) applications.

Ericsson said its advanced mechanical surface-mount technology is based on highly accurately tooled pins that are inserted and aligned during the original assembly process. The same hardware is used for through-hole and surface-mount versions of the BMR456, which increases the flexibility and speed of manufacturing and contributes to smaller lead times, added the firm. The surface-mount pins are manufactured with very tight tolerances, guaranteeing co-planarity and mechanical accuracy. This process ensures high reliability and host equipment availability.

In addition to input and output power connections, additional I/O (±output remote sense, address pin, PMBus clock and data, power good and user configurable I/O, PMBus ground, PMBus alert signal and PMBus remote control or current sharing) is made available through a micro-interface. This connector has been designed to comply with Ericsson’s advanced high-precision surface-mount technology and to guarantee full alignment and co-planarity during different soldering processes, the company indicated.

The FRIDA II generation of fully regulated digital DC/DC converters is based on a 32bit ARM MCU that embeds the family’s most advanced firmware to date, called the Ericsson DC/DC Energy Optimizer. This combines advanced Ericsson IP together with a series of industry-first functionalities to continually optimize switching parameters and reduce energy consumption to an absolute minimum. The firmware has been developed to guarantee the highest possible performance at any point of operation from low load to high load, and to handle line transients such as those occurring in Advanced Telecommunications Computing Architecture (ATCA) applications when, for example, switching from Feed A to Feed B.

Designed to power telecom and datacom applications, the BRM456-SI is available in two input voltages ranges: 36-75V (telecom), delivering output power of 420W; and 40-60V (datacom), delivering output power up to 468W. Output voltage can be adjusted across a range from 4-13.2V via PMBus commands, making the module suitable for dynamic bus voltage operation resulting in the reduction of energy consumption when communication data traffic is low.

In addition, taking full advantage of a highly optimized layout and firmware-optimized parameter switching to reduce power losses, the BMR456-SI delivers a typical efficiency of 96.5 percent and exhibits flat curve behavior from 14-100 percent load.

The BMR456-SI meets the insulation requirements of EN60950, sustains an I/O isolation voltage of 2.25kVDC, and also offers an extensive set of capabilities and features such as: remote sensing; PMBus-configurable protection (over-temperature, over-current and over-voltage); configurable start/stop; precision delay ramp-up; voltage margining; configurable fault response; power good; and extensive power management programmability.

The price of the BMR456-SI starts at Rs.2,500.00 ($46) in OEM quantities.

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