High Power 1300W DC-DC Converter In Quarter-Brick Format


An efficient solution with a very high power density, makes it ideal for demanding applications such as data centres

Flex Power Modules announces the launch of 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 new converter combines very high power density with excellent thermal performance in a price-sensitive design.


In developing the converter, Flex Power Modules has registered more than 10 patents, 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. Together, these measures lead 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 Hybrid Ratio Regulation (HRR) 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 new 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.

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Input to output is non-isolated.

Key Features

  • Input voltage range: 40V to 60V
  • Output voltage: 12V
  • Output current: 145A
  • High efficiency of typically 97.3% at 53V input and half load
  • Excellent thermal performance reduces system costs


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.



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