High-Efficiency Power Converter has 1/8 brick form factor.May 10, 2010 -
Designed to power 100 W boards in 48 V Information and Communication Technology applications, PKB-A series delivers 30 A or 125 W with high efficiency throughout operating range. There are 2 models within PKB 4000 A 48 V input (38-72 V) platform: PKB 4111A (5 V/25 A) and PKB 4910A (3.3 V/30 A). Both are available for SMT and through-hole assembly use. At nominal voltage, models respectively deliver typical efficiencies of 92.3% and 91.0% at full load.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
ERICSSON INC.
NORTH AMERICAN HEADQUARTERS
PLANO, TX, 75024
USA
Ericsson's 1/8 Brick Converter Offers High Performance and Cost Efficiency
100W platform for high volume applications and the ideal board-mounted power module to power micro-cell repeaters
Low power consumption, high efficiency contributing to save energy
Cost efficient products without any compromise on quality, reliability and the environmental
Based on a well established electrical platform used by Ericsson Power Modules in its original eight-brick PKB, the latest PKB-A series is design-optimized to deliver 30A or 125W with high efficiency throughout the operating range for applications requiring an average power of 100W. With the heritage of the PKB series combined with elements of the cost efficient PKM-E platform, the PKB-A has been designed to meld two important market requirements, low power consumption and cost efficiency. Thus PKB-A offers customers an alternative solution when the requirement is to reduce hardware-cost without compromising quality and long term reliability.
"With the increase in demand for high-speed communications and broadband everywhere, systems architects are facing an increase in demand for remotely located low and medium power systems requiring an average of 100W of power. Because these systems are deployed in high-volumes, they have to be cost effective without compromising quality and reliability, and that is what Power Modules has achieved with PKB-A", said Patrick Le Fèvre Marketing and Communication Director at Ericsson Power Modules.
Combining low power consumption, high efficiency, and cost effectiveness while guaranteeing high quality and reliability level are often perceived as a complex equation. That is the challenge that Ericsson designers had to address, and the PKB-A is the result of best practice deployed across various disciplines at Power Modules. In this respect, combining electrical and mechanical design, layout optimization and an easy-to-manufacture methodology are all part of Ericsson Power Modules' DfM (Design for Manufacturing) concept. Excellent thermal design makes it possible to utilize full power so that the 100W ceiling is easily passed with a cost efficient product.
Currently, the PKB-A series comprises two models within the PKB 4000A 48V input (38V to 72V) platform. These are the PKB 4111A (5V/25A) and the PKB 4910A (3.3V/30A). Both products are available for surface mount use as SI versions, and through-hole assembly use as PI versions. At its nominal voltage (48V) at 50% load, PKB 4111A (5V) has a typical efficiency of 93.1% and 92.3% at full load, whilst the PKB 4910A (3.3V) offers 92.7% at 50% load and 91.0% at full load.
To address the needs of ICT applications requiring higher functional isolation, the PKB-A is designed to sustain 2250Vdc input to output isolation. Its low profile of 8.5mm (0.335") allows designers to layout in a chassis using a narrow board-pitch below the traditional 0.8 inch, and thanks to low building practices, significantly improve airflow across the board.
Primarily designed to power 100W boards in 48V Information and Communication Technology applications, as a result of its optimized cost structure and efficiency, PKB-A is an ideal board-mounted power module to power micro-cells repeaters, local transmitters also many other on-board power applications such as servers, routers and wide range of systems where cost reduction is the aim. Specific examples include 100W boards powering systems such as 5V intermediate bus architecture, memories, DSP, FPGA, ASIC and other integrated circuits requiring 5V and/or 3.3V.
The PKB-A is pinout compatible with quarter-brick units making it simple to replace older, low efficient 100W quarter-bricks when upgrading boards. It is compliant with the RoHS directive 2002/95/EC.
Comprehensive protections embrace output over-voltage and short-circuit protection, input under-voltage protection, and over-temperature protection. Other features include monotonic startup, remote sense and control, and a choice of remote control logic - negative or positive.
In technology terms, the PKB-A is based on the deployment of a board-integrated transformer, and its layout has been optimized to minimize hot spots and to reduce layer-to-layer power losses. On the top side, the layout and positioning of components have been optimized to simplify cooling when converters are mounted onto a cold-wall via a thermal pad.
In summary, PKB-A is the result of a way of working developed by Ericsson Power Modules to introduce cost efficient products without any compromise on quality, reliability and the environmental.
In OEM quantities, the PKB-A is priced at US $24.
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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