BMR491 high power quarter brick isolated DC/DC converter variants

Through this, they are able to deliver extended power capabilities together with the efficiency and resilience to voltage transients that would usually be expected from a fixed-ratio converter.

The BMR4910204/852 converter for example is capable of delivering an output power of up to 1300 W continuous and has 1,850W peak power for a period <1s. It supports 97.6% efficiency at 48 Vin at half load. Supplied in an industry standard low-profile quarter-brick format, with 58.4x36.8x14.5mm dimensions, these units have an input voltage range of 48 to 60V (in-line with what data centre applications mandate) and can provide up to 160 A of output current. Input to output isolation is 1,500V.

The second variant, the BMR4910203/851, operates over a wider input voltage of 40 to 60V and again delivers up to 1300 W of continuous power with 12V over the whole input range. However, this fully regulated version also allows paralleling of up to five modules enabling solutions to be created delivering >500 A or 6.5kW. Efficiency is 97.4% at 48 Vin and half load.

Sophisticated over-voltage, over-temperature and short-circuit protection mechanisms deliver a prolonged operational lifespan with a mean time between failures (MTBF) of 7.7 million hours.

Incorporation of a baseplate facilitates heat dissipation, while 1500V galvanic isolation between the input and output assures elevated degrees of safety. 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 to +125°C.