Ericsson’s new power converter optimized for parallel operation

New high-density DC/DC power converter optimized for parallel operation. Easy paralleling ability and scalable up to three units reduces time-to-market and delivers power levels of up to 2200W for high-data-demand network boards. Advanced Hybrid Regulated Ratio technology and Droop Load Sharing boost performance to meet high-power board demands.
E0196(A) PKM4817LNH-DLS

Ericsson has introduced a new DC/DC converter module based on the company’s innovative and proprietary power topology known as Hybrid Regulated Ratio (HRR) technology. The latest member of the PKM-NH series, the PKM4817LNH has been optimized for parallel operation to power 2200W boards in extreme-data-demand applications in the datacom industry.

Offering 800W of power per unit, up to three PKM4817LNH modules can be connected in parallel to achieve a total deliverable power of 2200W. Parallel mode uses Droop Load Sharing, which means the output voltage has a typical droop characteristic, whereby the output voltage slightly decreases when the load is increasing, while staying within system voltage limits.

Patrick Le Fèvre, Marketing and Communication Director, Ericsson Power Modules, says: "The ability to operate these advanced high-power-density DC/DC converters in parallel meets the increasing need in the datacom industry for ever higher power with boards now reaching 2kW. The combination of Ericsson’s HRR technology and the ability to easily parallel these new modules makes it possible to deliver the necessary high-density power required in extreme data traffic applications."

Available in a quarter-brick format with a footprint of 57.9 x 36.8 x 11.4mm, the PKM4817LNH operates with an input voltage range of 45V to 60V and delivers an output voltage of 10V-11V at 80A within the operational system voltage between 51V and 60V. Below 50V, in regulated-ratio mode, the output voltage self-adjusts for optimal operation and secures a stable voltage of 9.0V to 11V, even if the system bus voltage delivered via the front-end rectifier is operating abnormally. Obtaining a stable and regulated voltage while the system bus runs its normal operational voltage becomes a highly important capability to avoid traffic disruption, as well as providing enough time for system monitors to take required action and either turn on redundant power units or potentially shut down part of the system.