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DC/DC converter powers 12V intermediate bus

Posted: 10 Nov 2009 ?? ?Print Version ?Bookmark and Share

Keywords:DC/DC converter? power amplifier? cold-wall technology?

PKB4513PINBLC DC/DC converter

Ericsson Power Modules has launched the PKB4513PINBLC is 50W eighth-brick DC/DC converter that powers 12V intermediate bus architectures. The devices is designed to operate in sealed enclosures where cooling is not based on conventional forced-air cooling and fans, but via passive cold-wall technology in applications such as power amplifiers and transceivers.

Optimized to comply with low-height and low-thermal resistance building practices, the PKB4513PINBLC is suitable for a very large range of applications and systems that use cold-wall cooling technology. This is largely facilitated by its wide input voltage range of 35 to 60V, 2250Vdc input to output isolation, and its application specific mechanical design where all the heat dissipating components are assembled on the top-side. With this latter feature, the converter becomes a homogeneous component with the rest of circuitry, simplifying the thermal interconnection between heat dissipating components and the system cold-wall, without an additional baseplate.

The converter's low profile (8.73mm) makes it suitable for use in chassis with a 10mm inner height. Avoiding adding a baseplate and matching customers' components height results in excellent homogeneity, simplify the assembling process and reducing cost while increasing reliability. Further, by reducing thermal resistance between dissipating components and the cooling plate, the modules' performance is optimized, significantly reducing component stress, resulting in a high MTBF of greater than 1.6 million hours.

The most important application areas for the PKB4153PINBLC are antennas and equipments such as power-amplifiers, combiners, monitoring, local repeaters and other applications embedded in sealed enclosures that are cooling plate (cold-wall) cooled. Its accurate, 12V output voltage and tight regulation make the PKB4513PINBLC suitable for a large range of applications that employ a 12V intermediate bus architecture.

Exhibiting versatility, the converters are able to operate over a wide temperature range of -40C to 120C. Output power is 45W, and efficiency is 91.8 percentboth figures are maximum. Output current is 4A maximum.

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