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Flex Power Modules unveils 1300W DC-DC converter in quarter-brick format

Flex Power Modules has launched the BMR490, a non-isolated digital IBC (Intermediate Bus Converter) DC-DC converter with an output power of 1300W in the quarter-brick form factor.

The converter combines very high power density with improved thermal performance in a price-sensitive design, and is suitable for demanding applications such as data centres.

Flex Power Modules has registered more than 10 patents in developing the converter, which in part have led to significant improvements in the area of thermal management within the converter. To help with the thermal performance, manufacturing has also been improved, with the baseplate screwed directly to the converter’s PCB. These measures have led to an increase of usable power from the BMR490 of over 20% when compared to similarly rated modules in extended temperatures.

The BMR490 provides a digital interface fully compliant to PMBus 1.3, which makes it simple to reconfigure, and therefore to fine-tune the functionality to respond to the requirements of a particular application. The converter can be configured using the Flex Power Designer software, which provides detailed simulations including thermal modelling, and therefore helps reduce development time and minimise the risk of weaknesses in a power system design.

The BMR490 also offers high efficiency of typically 97.3%, at 53V input and half load. This has been achieved in part due to Hybrid Ratio Regulation (HRR), which enables the converter to switch seamlessly between conventional fixed-ratio or fixed-output conversion modes, depending on the input voltage and output demand. HRR delivers greater efficiency and power delivery under the commonest operating conditions, permits a wide input voltage range, and provides a superior response to transients.

The converter is aimed at a variety of high power applications including data centres, high speed cloud, high performance computing, high capacity storage and high speed optical networking.

The input voltage range is 40V to 60V, with an output voltage of 12V and output current up to 145A. Input to output is non-isolated. The BMR490 is provided in an industry standard low-profile quarter brick package, measuring 58.4 x 36.8 x 14.5 mm (2.30 x 1.45 x 0.57 in).

The BMR490 will be available in OEM quantities from April 2019.

Author
Neil Tyler

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