POL Voltage Regulators offer PMBus eead/write capability.

Press Release Summary:



Digitally controlled and rated at 20 and 40 A, respectively, BMR450 and BMR451 point-of-load (POL) voltage regulators can write as well as read data via power management bus (PMBus). Read-back affords range of monitoring options, such as output-voltage and current, temperature, and power-good, while write-mode makes it possible to program output voltage and modify it as function of load condition. Users can adjust current limits and warning levels and remotely turn modules into sleep-mode.



Original Press Release:



ERICSSON Adds Full PMBus Read and Write Capability to Voltage Regulators



  • Great level of freedom for designers to dynamically optimize energy management
  • New 3E products able to write and read data via the power management bus
  • OEM product design very much simplified reducing time-to-market

    In a major product update, Ericsson Power Modules' BMR450 and BMR451 point-of-load voltage regulators are now able to write as well as read data via the power management bus; PMBus. Customers buying these revision 2A products will have access to the internal memory of Ericsson's 3E* point-of-load voltage regulators, providing high flexibility to program functional parameters to match specific profiles required by FPGA, ASIC, memories and other components. Revision 2A complies with PMBus read & write modes.

    Read-back offered end-users a large range of monitoring options such as output-voltage and current, temperature, power-good. Now with added write-mode it is possible to program the output voltage to a very specific voltage, and to modify this voltage as a function of load condition. It is also possible to sequence modules, and to modify sequencing to account for new configurations that some processors may require. Further, it enables one to adjust current limits and warning levels, to remotely turn modules into sleep-mode, plus many other dynamic features. At its most intimate level, write-mode makes it possible to optimize the compensation loop and many other internal parameters that ultimately contribute to reduce the amount of filtering capacitors and improve dynamic response.

    The products are aimed at (but not limited to) the new generation of information and communication technology equipment where systems' architects are optimizing board designs for optimized control and reduced power consumption. The most important application areas are wireless and fixed networks - optical network equipment - data server and data storage but also in a broad range of industrial applications from medical to process control, and even in automotive applications.

    "Now, with access to the central controller of Ericsson's 3E point-of-load voltage regulators, board and systems' designers have a great deal of freedom to program, configure and monitor board mounted power solutions that will make it possible for them to optimize energy efficiency at a very low level of their applications, reducing energy consumption and optimizing systems' performances" said Patrick Le Fèvre, director of marketing and communication at Ericsson Power Modules.

    The BMR450 and BMR451 use a highly integrated digital PWM controller. This makes it possible to increase current density while decreasing footprint, and to reduce component count by 50%. Further, thanks to flexibility offered by write-mode, it is possible to reduce power consumption by adjusting critical parameters to match load conditions, resulting in higher efficiency throughout the whole range of operation.

    Both devices are digitally controlled and rated at 20 A and 40 A respectively. They feature a high current density in the order of three times greater than an analogue voltage regulator for a similar in/out performance. Indeed, a higher current density and lower footprint are two important factors for designers when considering board space to accommodate other vital components of their core application. Smaller voltage regulators are easier to locate close to FPGAs, DSPs and other processors, reducing power losses and parasitic inductance issues.

    In order to assist designers when evaluating Ericsson's 3E point-of-load digitally controlled voltage regulators, an evaluation kit simplifies their application within PMBus systems. The 3E GUI Silver Edition evaluation kit makes it easy for engineers to monitor (read), program (write), and test the full range of BMR45x-series parts within a representative hardware and software environment. The kit's software package features a graphical user interface that's exceptionally easy to use, unlocking the power of these PMBus-programmable devices to make even complex applications easily approachable.

    The BMR450 is priced at $11, and the BMR451 is priced at $22, both in OEM quantities.

    * Enhanced Performance, Energy Management, and End-user Value.

    Ericsson is the world's leading provider of technology and services to telecom operators. Ericsson is the leader in 2G, 3G and 4G mobile technologies, and provides support for networks with over 2 billion subscribers and has the leading position in managed services. The company's portfolio comprises mobile and fixed network infrastructure, telecom services, software, broadband and multimedia solutions for operators, enterprises and the media industry. The Sony Ericsson and ST-Ericsson joint ventures provide consumers with feature-rich personal mobile devices.

    Ericsson is advancing its vision of being the "prime driver in an all-communicating world" through innovation, technology, and sustainable business solutions. Working in 175 countries, more than 80,000 employees generated revenue of SEK 206.5 billion (USD 27.1 billion) in 2009. Founded in 1876 with the headquarters in Stockholm, Sweden, Ericsson is listed on OMX NASDAQ, Stockholm and NASDAQ New York.

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