Industry’s first 750W Hybrid Regulated Ratio DC/DC converter. Quarter-brick module delivers high power density of 31.12W/cm3 per cm3 (508W per cubic inch). Highly-innovative regulated-ratio topology module delivers high-efficiency flat-curve characteristics of up to 97%.

Ericsson has unveiled an industry first with its new hybrid-regulated topology. The new PKM-NH platform is optimized for datacom board applications that have a 52V/54V system bus distribution and require regulated high-power quarter-brick-format intermediate bus converters able to deliver up to 750W.

To meet the challenge of packing a 750W regulated DC/DC converter in a quarter-brick format, Ericsson has developed an innovative proprietary topology known as Hybrid Regulated Ratio (HRR). The topology combines two power-control methods – voltage-regulation and ratio-regulation – resulting in high performance across the input voltage ranges used in datacom systems, which are usually between 40V to 60V.

The HRR topology implemented in the Ericsson PKM-NH platform delivers an excellent response to line or load transients and guarantees the output voltage will remain stable and immune from voltage deviation due to power disturbances on the system bus voltage. This means it retains intermediate bus voltage integrity within the tolerance band required by power system architects.

"The increased demand for high-power DC/DC converters in the datacom industry is pushing power density to unprecedented levels, requiring designers to explore new possibilities in power conversion technology," said Patrick Le Fèvre, Marketing and Communication Director, Ericsson Power Modules. "The PKM4717NH is a breakthrough product and is the first based on the truly innovative Hybrid Regulated Ratio technology developed by Ericsson. Offering a power density of 31.12W/cm3 (508W/in3), the PKM4717NH is the most advanced regulated DC/DC power module for datacom applications."