Ericsson unveils advanced bus converter

Ericsson has launched a low-profile, 450W DC/DC converter module that is designed to deliver a tightly regulated 12V output voltage at up to 37.5A to point-of-load (POL) DC/DC converters.

The PKB4413D has a 5-pin 1/8-brick footprint, which is compatible with the DOSA (Distributed-power Open Standards Alliance) standard. It also has an input range from 36V to 60V and is intended for intermediate bus conversion in ICT (Information and Communication Technologies) applications.

The PKB4413D incorporates Ericsson’s HRR (Hybrid Regulated Ratio) technology which means that it is able to deliver high-power conversion from a wide input voltage range, while keeping power losses low. The module has been designed to work in thermally challenging environments and delivers a typical efficiency of 96%, with a 48V input and 12V output at half-load, the module significantly reduces energy and cooling costs.

Meeting the deployment requirements for distributed power and intermediate bus voltage architectures, the module particularly targets high-power and high-performance use in networking and telecommunications equipment, servers and data storage applications, as well as industrial equipment.

The converter has been designed to provide higher useable power in high ambient temperatures or limited-airflow environments. The use of tellurium copper pins provides excellent thermal transport, and a baseplate connects the module to a heatsink or coldplate as standard. In addition, careful attention was given to the design of the thermal path from the thermally critical components to the baseplate. This has resulted in a flat thermal profile for the critical components and outstanding heat transfer to the baseplate or heatsink.

Designed to be through-hole mounted, the PKB4413D comes in the industry-standard eighth-brick format, measuring 58.4 x 22.7 x 13.2mm (2.30 x 0.89 x 0.52 inches). Providing 1500V(dc) I/O isolation, the module also integrates a number of I/O protection and operational features, including: monotonic start-up and remote control as well as input under-voltage shutdown, output over-voltage, over-temperature and output short-circuit protection. The device meets the safety requirements of IEC/EN/UL60950-1 and has a calculated MTBF of 8.5 million hours.

Author
Neil Tyler