New Industry Products

Ericsson Presents Dual Output DC-DC Converters as Drop-Ins for Earlier MacroDens Modules

April 08, 2007 by Jeff Shepard

Ericsson Power Modules has released three PKR modules aimed primarily at powering telecom and datacom 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. 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 "telecom 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 "telecom" 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. The devices’ "board to board" technology is a proven platform optimized for cost efficiency and simplifying the assembly process. Their floating dual outputs provide a flexible output range offering multiple combinations – such as ±12 to generate 24V.

Moving from the molded MacroDens (PKF) to an open-frame design (PKR), the product has lost 50% of its weight (PKF typical weight 18gm, PKR typical weight 9gm), 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 molded ceramic substrate to open-frame single sided component mounting assembled on FR4 has greatly contributed to making the products very competitive when compared to competitors’ alternatives, according to the company.