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Ericsson Power Modules has launched the PKM5000D quarter-brick, isolated DC/DC converter for a wide range of applications in information and communications technologies (ICT).

The DC/DC converter series has been designed for systems powered by 24V or 48V batteries and is optimised to deliver high efficiency across an input voltage range of 18V to 75V.

It is suitable for a large range of applications in ICT, offering systems designers the opportunity to use the same DC/DC converter in 24V and 48V systems, and also to power remote-feeding applications that utilise 20V to 60V line voltages with an operational margin to ensure that remote systems will always operate whatever the source voltage status is.

ICT equipment is mostly powered by 48V but it is common in radio applications to use 24V batteries instead.

As a result, systems designers often have to design two versions of the same board, embedding a dedicated 48V or 24V DC/DC converter, when an ultra-wide input range module could accommodate both voltages in one single unit.

The series’ ultra-wide input range of 4:1 is primarily for use in radio base-stations equipment but is also suited to power industrial applications using remote peripheral equipment powered through long wires, similar to remote feeding traditionally used in radio base stations.

The PKM5000D is also suitable for applications such as transportation, test equipment, process control and others.

The designer’s task is simplified when designing multi-bus voltage boards that could be used in different applications powered by 24V and/or 48V batteries, therefore simplifying inventory management and reducing cost.

The first variant released in the series is a 12V tightly regulated converter with an output current of 10A.

More variants will soon be offered as the series rolls out.

Because it is based on a standard quarter-brick footprint, when designers are upgrading existing 48V or 24V boards to match ‘single code boards’ to cover both system voltages, without redesign the PKM5000D can replace 2:1 input DC/DC converters, accommodating both voltages in one ‘single code module’.

Ericsson Power Modules said at 120W the PKM5000D offers 20 per cent than current similar products available on the market.

With a half-load efficiency figure of 91.8 per cent at 27V input voltage and 89 per cents at 53V input voltage, the converter is well positioned in the marketplace for ultra-wide input range products.

By using external resistors, the converter’s output voltage can be adjusted in the range of 10.8V to 13.2V and the standard product is delivered with a remote control that complies with negative logic, with positive logic available as an option.

Protection levels include over-temperature, over-current limit, and over-voltage.

For safety, the PKM5000D has a galvanic input to output isolation of 1,500V and offers a mean time before failure of 1.47 million hours.

It is also compliant with the RoHS directive 2002/95/EC.

Ericsson’s PKM5000D is based on a multi-layer PCB integrated transformer technology and its power train and secondary synchronous rectifiers have been optimised to accommodate switching parameters to meet the specific constraints inherent to an ultra-wide input range.

Ericsson Power Modules

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