BMR491 series

1850 W quarter brick digital isolated DC/DC converter for datacom applications

The BMR491 is the sixth generation of our digitally controlled Advanced Bus Converter packaged in a quarter-brick format. There are initially two 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.

Both converters have a continuous output power of 1300 W, and the 48-60 V input version 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 48Vin / 50% load.

The BMR491 series has an operating temperature range from -40°C up to +125°C 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 version, 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.

The BMR491 is supported by our own Flex Power Designer tool.

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Model Vin Vout Pout Iout Eff Size Mount