Flex Power Modules enhances thermal balance in a DC/DC converter
Active power sharing is included in the BMR490 DC/DC converter released by Flex Power Modules. The current sharing capability enables two or more converters to be used in parallel for demanding datacomms applications, delivering higher power on a single rail and improving redundancy.
Up to six BMR490 converters may be used in parallel. When used in combination with OR-ing, this increases redundancy, because power will still be supplied if one or more converters fails. If redundancy is not required, the converters can be used in parallel without OR-ing diodes, which increases efficiency, explains Flex Power Modules.
According to Flex, the BMR490 enables better thermal balance between load and sharing units compared to using traditional droop load sharing (DLS). In addition to the higher accuracy achieved by active current sharing, each unit can deliver higher output power in parallel mode than any competitive solution, up to 1,260W per module over the full input voltage range, with droop of 200mV at full power and nominal input.
The BMR490 is a non-isolated DC/DC converter in the compact quarter-brick form factor, measuring 58.4 x 36.8 x 14.5mm (2.3 x 1.45 x 0.57-inches). It can provide an output power of up to 1,300W, with an input voltage range of 40 to 60V, and output voltage of 12V. The converter offers high efficiency of typically 97.3 per cent at 53Vin and half load, in part due to the fact that it is the industry’s first parallelable hybrid regulated ratio (HRR) module.
The BMR490 with active current sharing is available from October 2019.
Flex Power Modules is a division of Flex. It designs and manufactures scalable power supply solutions that improve the operational efficiencies of advanced data centre, IT information and communications networks. Flex Power Modules also offers products for the industrial and transportation sector. Flex Power Modules’ products can be used for cloud, storage and server applications.
