BMR491 series

The BMR491 is the sixth generation of our digitally controlled Advanced Bus Converter packaged in a quarter-brick format. There are three versions, with input voltage ranges of 40 to 60V and 48 to 60 V, which meet the typical voltage requirements used in a data center environment. Each device delivers a nominal output voltage of 12 V.

Two initial versions have a continuous output power of 1300 W, and the 48-60 V input variant of that can deliver a peak power level of up to 1850 W for <1 second. This version of the BMR491 has a typical efficiency of up to 97.6% at 48V_in / 50% load.

The third version has a continuous output power of 1540 W, and can deliver a peak power level of up to 2450 W for <1 second. This version of the BMR491 has a typical efficiency of up to 97.5% at 48V_in / 50% load.

The BMR491 series has an operating temperature range from -40°C up to +125°C (hot spot temperature) and has a mean time between failure (MTBF) of over 7 million hours.

The BMR491 incorporates enhanced thermal conduction techniques for superior heat transfer through the baseplate.

Standard features for the BMR491 include hybrid regulated ratio (HRR) for the 48-60 V input versions, active current sharing for the 40-60 V version enabling paralleling of up to 5 modules, output over voltage protection, output short-circuit protection, over temperature protection, and a digital interface using the PMBus^® protocol using either the 4-pin or 7-pin industry standard.

The BMR491 includes a PMBus^® interface for digital Configuration, Monitoring and Control, and is supported by our own Flex Power Designer tool.