Switched capacitor intermediate bus converter for 48 V data center applications

Posted 20 September 2021

Flex Power Modules introduces the BMR310, a non-isolated switched capacitor intermediate bus converter (IBC) which provides high power density for data centers, thus improving board space utilization and freeing space for other components. Built on the proprietary Zero voltage switching Switched capacitor Converter (ZSC) technology of Infineon Technologies, the BMR310 achieves efficiency of over 98 percent at half load and can deliver power up to 875 W continuous in a compact package. It operates over an input voltage range of 40 V to 60 V, and delivers an unregulated output voltage of 10 V to 15 V.

The BMR310 is mounted horizontally with a height profile of 10.3 mm, making it suitable for systems with limited space due to large heatsinks or cold plates. It measures 58.4 mm x 25.0 mm x 10.3 mm. The current mounting option is base-plated but an open frame will be available with future models.

To maximize operating lifespan, the BMR310 includes over-voltage, under-voltage, over-current and over-temperature protection function. As with all Flex Power Modules’ DC/DC converters, it complies with IEC/EN/UL 62368-1 safety standards.

Paralleling of converters is supported using passive droop load sharing, enabling multiple converters to be combined to deliver higher power if required. The BMR310 is compatible with the Flex Power Designer software tool, and the new converter includes a PMBus interface for digital control.



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