New pair of dc/dc converters with respective 5 and 3.3-V outputs are said to deliver 95% in eighth-brick-format. The 40-A-class PKB4211D and PKB4110D target high-end and high-power Information and Communication Technologies (ICT) industry applications. The supplies can handle airflow-limited environments because of their industry-leading thermal performance at 85°C ambients.

Developed by Ericsson, the PKB4211D and PKB4110D deliver respective efficiencies of up to 95.3% and 94.7%, with tightly regulated 5 and 3.3-V outputs at 50% load. Competitive products will typically dissipate approximately 8% more power at a full load of 40 A.

The two new modules target high-end and high-power applications powered by multi-cell batteries or rectifiers in ICT applications including telecommunications and networking, servers and storage systems, and industrial equipment.

Offering a wide voltage input range from 36 to 75 V, the PKB4211D delivers up to 200 W output power with a 5-V, 40-A output, and the PKB4110D provides up to 132 W with a 3.3-V, 40-A output. Both are available in an industry-standard DOSA-compatible five-pin eighth-brick footprint with dimensions of 58.4 x 22.7 mm and profile height of 9.6 mm.

A key feature of the PKB4000 series is its ability to deliver higher usable power in high ambient temperatures and environments with limited airflow. The PKB4211D can deliver full power of 5 V at 40 A in 70°C with 200 LFM (linear feet per minute) airflow in an open-frame unit with no baseplate. The module can also deliver the same load in 80°C with 200 LFM airflow with optional heatsink.

In addition, the open-frame version of the PKB4110D provides full power, delivering a 3.3 V 40 A output at 80°C with 200 LFM airflow and at 85°C with 200 LFM airflow with a baseplate. While use of the modules’ optional baseplate offers improved thermal performance, the units can also be connected to a heatsink or cold plate.

Offering an MTBF (mean time before failure) of 9.33 million hours, the modules meet safety requirements according to IEC/EN/UL 60950-1 and offer input/output isolation of 2,250 Vdc. The series also includes many protection features including output-over-voltage protection (OVP), input-under-voltage shutdown, over-temperature protection (OTP), output short-circuit protection, and monotonic start-up and remote control capability.

Both units are available in through-hole and surface-mount versions. Both devices are available now in production volumes, with OEM pricing at $27.25 for the PKB4211D and $25.70 for the PKB4110D.

More info: www.ericsson.com/powermodules