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Bus converter outputs 300W at 42A

Posted: 08 Jul 2008 ?? ?Print Version ?Bookmark and Share

Keywords:DC/DC bus converter? eighth brick format? wireless networks?


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 do. 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 percent 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, overtemperature protection, output overcurrent and overvoltage protection, and input undervoltage protection. Applications for the converter include 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 optimization 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 percent at 48Vin from 50 percent to 100 percent load, which matches with the very best products on the market. Excellent thermal performance is achieved at full power at 70C 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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