This so-called ‘burst mode’ operation is commonly required for CPUs (such as Intel’s Ice Lake processor for example) for datacom and data centre applications.
The BMR4920302/861 converter, the first of three variants of the BMR492 family to be introduced, delivers a 12V output. Rated to a maximum 600W output over an input voltage range of between 40-60V, the DC/DC step-down solution is ideal for nominal 48 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 1500Vdc.
This BMR492 variant delivers an extremely efficient operation evidenced by a peak efficiency of 96.7% at 48 Vin at half load. The output voltage is pre-programmed at 12 V as standard, but this can be adjusted across a wide range of 8 to 13.2 V via the incorporated PMBus interface. This feature is also useful to optimise system level efficiencies through dynamic bus voltage adjustment according to the supplied load.
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 have a standard DOSA pinout including the 7-pin digital header for the PMBus interface.
Sophisticated over-voltage, over-temperature, and short-circuit protection mechanisms help to provide a prolonged operational lifespan with a mean time between failures (MTBF) of 6.64 million hours. In addition, as with all Flex Power Modules’ DC/DC converters, these units comply with IEC/EN/UL 62368-1 safety standards. The devices offer an operational temperature range of -40°C to +125°C.
The solution is fully supported by Flex Power Designer, the design software tool that's freely available to download from the flexpowerdesigner.com website.
