Eighth-brick DC/DC converters deliver up to 1100 W

Flex Power Modules has launched the BMR492 series of digital eighth-brick intermediate bus converters. These eighth-brick DC/DC converters can deliver between 600 to 800 W of continuous power with a peak power of up to 1100 W for short periods (<1 s), delivering a power level only previously possible in a quarter-brick format, according to the company.

This ‘burst mode’ operation is commonly required for CPUs (such as Intel’s Ice Lake processor) for datacom and data-center applications, said Flex Power Modules.

The BMR4920302/861 converter, the first of three variants in the BMR492 family, delivers a 12-V output. Rated to a maximum 600-W output over an input voltage range of between 40-60 V, the DC/DC step-down solution is suited for nominal 48-V or 54-V input voltage systems commonly found in data-center server applications. The through-hole mounted device is fully regulated and includes an input to isolation voltage of 1500 Vdc.

The BMR492 DC/DC converter delivers a peak efficiency of 96.7% at 48 Vin at half load. The output voltage is pre-programmed at 12 V as standard, which can be adjusted across a wide range of 8 to 13.2 V via the PMBus interface. This feature is also useful to optimize system level efficiencies through dynamic bus voltage adjustment according to the supplied load, said Flex Powe Modules.

The devices incorporate protection features, including over-voltage, over-temperature, and short-circuit protection to help provide a long operational life with a mean time between failure (MTBF) of 6.64 million hours. Like all of Flex Power Modules’ DC/DC converters, these power devices comply with IEC/EN/UL 62368-1 safety standards. The operating temperature range is -40°C to 125°C.

The BMR492 is supplied in an industry-standard eighth-brick format with 58.4 x 22.7 x 12.7 mm (2.3 x 0.90 x 0.34 in) dimensions. The baseplated converters come with a standard DOSA pinout including the 7-pin digital header for the PMBus interface.  The solution is supported by the Flex Power Designer design software tool, available to download for free at flexpowerdesigner.com website.

The BMR492-0302/861 variant will be available in OEM quantities starting in April 2021. Final specifications may be subject to modification. Future variants are expected to be introduced later this year.