Digital eighth-brick DC-DC converters deliver up to 1100W power capability

Flex Power Modules has launched the BMR492 – a series of digital eighth-brick intermediate bus converters able to deliver between 600W to 800W of continuous power with a peak power of up to 1100W for short periods <1s. This so-called ‘burst mode’ operation is generally required for CPUs for datacom and data centre applications.

The new BMR4920302/861 converter, the first of three versions of the family, provides a 12V output. Rated to a maximum 600W output over an input voltage range of 40-60V, the DC-DC step-down solution is excellent for nominal 48V or 54V input voltage systems generally found in data centre server applications. The through-hole mounted device is completely regulated and includes an input to isolation voltage of 1500VDC.

This BMR492 variant provides an extremely efficient operation evidenced by a peak efficiency of 96.7% at 48Vin at half load. The output voltage is pre-programmed at 12V as standard, but this can be adjusted across a wide range of 8V to 13.2V through the included PMBus interface. This feature is also beneficial to optimise system-level efficiencies through dynamic bus voltage adjustment according to the supplied load.

“The BMR492 delivers a power level that was previously only made possible in a quarter-brick format. The reduction of board area now provided when using this new converter enables our customers to free up space on PCBs for the core technology of their designs rather than for power,” said Olle Hellgren, director product management and business development at Flex Power Modules. “For demanding datacom applications, the BMR492 is a versatile power solution in a small package that solves many major design challenges.

Supplied in an industry-standard eighth-brick format with 58.4mm x 22.7mm x 12.7mm (2.3" x 0.34") dimensions, the baseplated converters offer a standard DOSA pinout including the seven-pin digital header for the PMBus interface.