Flex Power Modules has launched a compact non-isolated digital surface mount DC-DC converter with a fixed 4:1 down-conversion ratio for intermediate bus applications.
The FLex BMR314 DC-DC converter measures 23.4 x 17.8 x 9.6 mm and provides 800 W continuous, 1.5 kW peak with an output of 9.5 – 15 VDC from an input range of 38 – 60 VDC (68 VDC peak) It is available as a surface mount device with LGA terminations in an industry-standard footprint and pinout.
The module uses the controller developed by Flex with onsemi for the BMR313 last year and is aimed at Point of Load (PoL) converters in AI and datacom centres where high peak loads can occur and space is at a premium.
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The controller enables an efficiency of 97.4% peak in a low-profile package optimized for cold wall cooling. Up to 70 A 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.
The MTBF of the BMR314 is 7.49 million hours according to Telcordia SR-332 Issue 4 Method 1 at +40°C. Operation is possible between -20°C and +125°C 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 BMR314 DC-DC converter is now available for sampling and is planned to go into volume production in Q4 2023.
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. For even higher power levels, the already-released BMR313 is available in the same footprint.