The non-isolated DC/DC converter has a fixed 4:1 down conversion ratio and provides 800W continuous, 1.5kW peak output from an

Input range is 38 to 60V DC (68V DC peak) for an output of 9.5 to 15V DC.

The BMR314 is targeted at applications such as powering point of load (PoL) converters in AI and datacomms centres where high peak loads can occur and where space is at a premium but energy saving is important. The converter has 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 protected against over-temperature, input under-voltage and output over-current, over-voltage and short circuits.

Control and monitoring are provided through a PMBus interface and MTBF is 7.47 million hours according to Telcordia SR-332 Issue 4 Method 1 at 40°C. Operating temperature range is -20°C and 125°C for a specified hot spot location. There is a timed warning and shutdown with over-temperature to minimise stress, particularly under peak loading conditions.

The DC/DC converter is available as a surface mount device with LGA terminations and 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. It is supported by the company’s Flex Power Designer software tool for configuration, performance simulation and monitoring.

BMR314 is now available for sampling and is planned to go into volume production in Q4 2023.