Quarter brick isolated DC-DC converter meets demands of energy-conscious data centres

Flex Power Modules has introduced two variants of the new BMR491 series. Targeting deployment in next-generation data centres aiming to satisfy increasingly stringent efficiency benchmarks, these advanced converters incorporate versions that leverage the company’s proprietary hybrid regulated ratio technology. Through this, they can provide extended power capabilities together with the efficiency and resilience to voltage transients that can be expected from a fixed-ratio converter.

The BMR4910204/852 converter, for example, is able to deliver an output power of up to 1300W continuous and has 1850W peak power for a period <1s. It supports 97.6% efficiency at 48Vin at half load. Provided in an industry-standard low-profile quarter-brick format, with 58.4mm x 36.8mm x 14.5mm (2.3" x 1.45" x 0.57") dimensions, these units have an input voltage range of 48V to 60V (in-line with what data centre applications mandate). They can deliver up to 160A of output current. Input to output isolation is 1500V.

The second variant, the BMR4910203/851, functions over a wider input voltage of 40-60V and again provides up to 1300W of continuous power with 12V over the entire input range. However, this fully regulated version also enables paralleling of up to five modules allowing solutions to be produced delivering >500A or 6.5kW. Efficiency is 97.4% at 48Vin and half load.

Inclusion of a baseplate enables heat dissipation, while 1500V galvanic isolation between the input and output assures high degrees of safety. These units comply with IEC/EN/UL 62368-1 safety standards. The devices provide an operational temperature range of -40C to +125C.