Eigth Brick DC-DC Converters Deliver Up To 1100 W Power Capability

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The device delivers increased efficiency and comes in a small package, making it suitable for demanding datacom applications

Capable of delivering continuous power between 600 to 800W along with a peak power of up to 1100 W for short periods <1s., the BMR492 series of digital eighth-brick intermediate bus converters provides a ‘burst mode’ operation that required for datacom CPUs and data centre applications.

The new BMR4920302/861 converter, the first of three variants of the BMR492 family to be introduced, delivers a 12V output. Rated to a maximum 600W output over an input voltage range of between 40-60V, the DC-DC step-down solution is ideal for nominal 48 or 54 V input voltage systems. The through-hole mounted device is fully regulated and includes an input to isolation voltage of 1500Vdc.

This BMR492 variant delivers efficiency of 96.7 per cent at 48 Vin at half load. The output voltage is pre-programmed at 12 V as standard, but this can be adjusted across a wide range of 8 to 13.2 V via the incorporated PMBus interface. This feature is also useful to optimise system-level efficiencies through dynamic bus voltage adjustment according to the supplied load.

“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 design challenges.

Supplied in an industry-standard eighth-brick format with 58.4 x 22.7 x 12.7 mm (2.3 x 0.90 x 0.34 in) dimensions, the baseplate converters have a standard DOSA pinout including the 7-pin digital header for the PMBus interface.

Sophisticated over-voltage, over-temperature and short-circuit protection mechanisms help to provide a prolonged operational lifespan with a mean time between failures (MTBF) of 6.64 million hours. Additionally, as with all Flex Power Modules’ DC-DC converters, these units comply with IEC/EN/UL 62368-1 safety standards. The devices offer an operational temperature range of -40 degrees Celsius to +125 degrees Celsius.

The BMR492-0302/861 variant will be available in OEM quantities from Flex Power Modules starting April 2021.


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