Ultra-small digital non-isolated IBC provides 4:1 conversion ratio

Flex Power Modules has released its BMR314 product, a non-isolated DC-DC converter featuring a fixed 4:1 down-conversion ratio for intermediate bus applications. The highly power-dense part provides an 800W continuous, 1.5kW peak from an industry-standard, ultra-small package sized 23.4mm x 17.8mm x 9.6mm. Input range is 38-60VDC (68VDC peak) for an output of 9.5-15VDC.

Featuring a controller developed by the company in conjunction with onsemi, the converter is aimed at applications such as powering PoL converters in AI and datacom centres where high peak loads can occur, space is at a premium and energy saving is important. The device enables this with its high efficiency of 97.4% peak in a low-profile package optimised for cold wall cooling. 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. Full control and monitoring are provided through a PMBus interface, and the product is supported by the Flex Power Designer software tool for configuration, performance simulation and monitoring.

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

The converter is supplied as a surface mount device with LGA terminations in an industry-standard footprint and pinout. The product 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. The already-released BMR313 is available in the same footprint for even higher power levels.

David Xie, director R&D and Product Management Shanghai of Flex Power Modules, comments: "Our new BMR314 IBC DC-DC can help to reduce size, weight and costs in critical data centre applications while providing the flexibility to safely handle high peak loads."