Digital non-isolated DC/DC converter serves high peak loads in AI and data centres

Featuring a fixed 4:1 down conversion ratio for intermediate bus applications, the BMR314 is a non-isolated DC/DC converter by Flex Power Modules.

The power-dense BMR314 provides 800W continuous, 1.5kW peak from an industry-standard, small package, measuring 23.4 x 17.8 x 9.6 mm. Input range is 38 to 60V DC (68V DC peak) for an output of 9.5 to 15V DC.

The converter features a controller developed by Flex Power Modules in conjunction with onsemi and targets powering point of load (PoL) converters in AI and datacomms centres where high peak loads can occur, where space is at a premium and energy saving is important. The high efficiency of 97.4 per cent peak in a low profile package optimised for cold wall cooling contributes to meeting these criteria. Up to 70A output current is available and the device is fully protected against over-temperature, input under-voltage and output over-current, over-voltage and short circuits.

MTBF is 7.49 million hours according to Telcordia SR-332 Issue 4 Method 1 at +40 degrees C. Operation is possible between -20 and +125 degrees C for a specified hot spot location. A timed warning and shutdown with over-temperature protection are also provided to ensure minimum stress, particularly under peak loading conditions.

The BMR314 is available as a surface mount device with LGA terminations in an industry standard footprint and pinout. It meets the safety requirements of IEC / EN / UL 62368-1 for non-isolated converters and meets ‘Class B’ conducted EMI limits to standards EN 55032 / CISPR 32 / FCC part 15J with a simple external filter.

Control and monitoring are provided through a PMBus interface and the Flex Power Designer software tool is available for configuration, performance simulation and monitoring support.
BMR314 is now available for sampling and is planned to go into volume production in Q4 2023.

Flex Power Modules manufactures scalable DC/DC power converters primarily serving the data processing, communications, industrial and transportation markets.

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