Product category:
DC/DC Convertors
News Release from: Ericsson Power Modules | Subject: PKR modules
Edited by the Electronicstalk Editorial
Team on 10 April 2007
Open-frame DC/DCs ease design migration
Convertors offer an easy switch for customers migrating from moulded to open-frame devices when redesigning boards to comply with RoHS legislation.
Expanding its highly successful MacroDens portfolio of DC/DC modules, Ericsson Power Modules has released three PKR modules aimed primarily at powering telecomms and datacomms transmission systems requiring floating dual outputs, such as line cards and optical transmitters Similarly, the PKR will also power a wide range of applications in instrumentation and process control that use analogue logic and communication chipsets
This article was originally published on Electronicstalk on 9 Dec 2002 at 8.00am (UK)
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With their floating design, the devices' dual outputs can also be configured in series, making them suitable for feeding many other applications (for example, 24V output).
These latest additions to the 23-model MacroDens range comprise the PKR4221A with a "telecomms input" voltage range of 36 to 75V with dual outputs (+/-12V/0.62A), the PKR2221A "industrial" input voltage range of 18 to 36V with dual outputs (+/-12V/0.62A), and the PKR4928A "telecomms" input voltage range of 36 to 75V with dual outputs (3.3V/2.1A-5V/0.5A).
Factors driving the demand for this type of DC/DC module are the increased demand for broadband access and high-speed Internet, combined with the huge number of fixed subscribers in emerging and growing markets, driving the demand for more-efficient power solutions and easy-to-use components that reduce time to market.
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The devices' "board to board" technology is a proven platform optimised for cost efficiency and simplifying the assembly process.
Their floating dual outputs provide a flexible output range offering multiple combinations such as +/-12V to generate 24V.
PKR is a 100% drop-in replacement for its predecessor the PKF, offering an easy switch for customers migrating from the moulded PKF to the open-frame PKR when redesigning boards to comply with RoHS legislation, and the forthcoming environmental requirements in the USA and Asia.
Thanks to the novel approach introduced by Ericsson in 2004, the board-to-board assembly concept gives PKR a very efficient building topology that is well aligned with current market demands in terms of cost efficiency, environmental compliance and simplicity.
This board-to-board single side component mounting design and the modules' special control IC are proprietary to Ericsson Power Modules.
Moving from the moulded MacroDens (PKF) to an open-frame design (PKR), the product has lost 50% of its weight (PKF typical weight 18g, PKR typical weight 9g), reducing additional costs related to packaging and transportation, which has a direct impact on reducing energy consumed during transportation, handling and assembling.
The device's reduced weight also helps the pick and place assembly procedure.
Additionally, moving from moulded ceramic substrate to open-frame single sided component mounting assembled on FR4 has greatly contributed to making the products very competitive when compared with competitors' alternatives.
Based on the same topology and bill of materials, the PKR series is 100% compatible and interoperable with established MacroDens PKF modules.
As part of the MacroDens concept, the PKR represents the latest evolution of a unique concept introduced by Ericsson 14 years ago, and proven throughout the years as the most reliable board-mounted product in its category.
With close to 40 million MacroDens shipped to market, the level of failures reported is below 100ppm.
Having entered mass production in Q1 2006, the total number of PKR shipments has passed one million products this month, confirming the extremely fast market adoption for the product and its commercial success.
Without compromise, Ericsson Power Modules' MacroDens PKR dual-output platform is the most optimised range of its kind on the market, offering cost efficiency for volume applications demanding floating dual outputs.
Line card designers and developers concerned with cost, energy efficiency and simplicity should seriously consider the PKR dual output range.
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