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Bus converter provides high output power

Posted: 08 Jul 2008     Print Version  Bookmark and Share

Keywords:DC/DC  bus converter  output power  eighth-brick format 


Ericsson Power Modules' eighth brick sized PKB-NG DC/DC bus converter provides an output power of 300W at 42A. With high output power and high efficiency, the converter offers users the opportunity to attain higher power levels in a smaller packaging than traditional quarter brick units.

Alternatively, it enables users to achieve higher power in a standard eighth-brick format when upgrading boards for higher performance.

End-customers are constantly adding functionality to applications, requiring more power per board while simultaneously expecting a reduction of space allocated to the onboard power sources. Fully titled PKB4302NG, this latest converter from Ericsson allows them to achieve this as the power available is up 15 per cent compared to some of the existing quarter bricks on the market.

The PKB4302NG is available in through hole and baseplate variations. This fixed ratio intermediate bus converter features an input voltage range of 38V to 55V and for versatility is configured with an industry standard footprint and pin out.

The converter meets the insulation requirements of EN60950 and comes complete with vital industry standard features such as remote on/off, over-temperature protection, output over-current and over-voltage protection, and input under-voltage protection. Application for the converter includes datacom/networking, wireless networks, optical network equipment, server and data storage.

The PKB4302NG is designed to be highly efficient and cost effective. With creative design technology and optimisation of component placement, the converter offers outstanding electrical and thermal performance, as well as high reliability under stressful operating conditions. It offers an extremely high efficiency figure of 97 per cent at 48Vin from 50 per cent to 100 per cent load, which matches with the very best products on the market. Excellent thermal performance is achieved at full power at 70°C with 2m/s airflow of cooling.

Careful PCB routing ensures low thermal as well as low electrical resistance. All loops that carry switching currents are kept to a minimum, resulting in low parasitic inductance. The electrical design employs a patent pending technique called 'SynchFET gate drive stretch' while the efficiency of the synchronous rectifiers is further increased.

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