Quarter Brick Isolated DC-DC Converter Addresses High Energy Demands

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The DC-DC converter solution uses hybrid regulated ratio (HRR) technology to offer efficient energy delivery

In order to develop next generation data centers that meet increasingly stringent efficiency benchmarks, Flex Power Modules has extended with the introduction of two new variants of the BMR491 series. Through this release, the company has extended its DC-DC converter solutions with built-in digital interfaces portfolio.

These advanced converters leverage the company’s proprietary hybrid regulated ratio (HRR) technology, through which an extended power with efficient delivery and resilience to voltage transients is provided, something that is usually expected from a fixed-ratio converter.

About BMR4910204/852

The BMR4910204/852 converter, for example, is capable of delivering an output power of up to 1300 W continuous and has 1850 W peak power for a period <1s. It supports 97.6 per cent efficiency at 48 Vin at half load.

Supplied in an industry standard low-profile quarter-brick format, with 58.4 x 36.8 x 14.5 mm (2.30 x 1.45 x 0.57 in) dimensions, these units have an input voltage range of 48 V to 60 V (in-line with what data center applications mandate) and can provide up to 160 A of output current. Input to output isolation is 1500 V.

About BMR4910203/851

The second variant, the BMR4910203/851, operates over a wider input voltage of 40-60 V and delivers up to 1300 W of continuous power with 12 Volt over the whole input range. However, this fully regulated version also allows paralleling of up to 5 modules enabling solutions to be created delivering >500 A or 6.5 kW. Efficiency is 97.4 per cent 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 and offer an operational temperature range of -40 degrees Celsius to +125 degrees Celsius.

The BMR491 will be available in OEM quantities before the end of the year.


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