The BMR490 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 BMR490 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. 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 58.4x36.8x14.5mm.
Flex Power Modules – www.flex.com