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DC/DC converters meet the challenges of hyperscale data centers
BMR351
1,600 W digital quarter brick IBC with peak power
Main Features
The BMR351 is a non-isolated digital Intermediate Bus Converter (IBC) with PMBus® interface. The device delivers up to 1,600 W of continuous power at efficiency levels of up to 97.8% (measured at half load) in an industry standard quarter brick measuring 58.4 x 36.8 x 14 mm using an integrated “open deck” baseplate or 14.7 mm using a flat baseplate which enables simplified conduction cooling to the customers’ heatsink or cold plate. Peak power delivery of up to 2,320 W (200 A) is available for <0.5s.
The input voltage range is 40–60 V which is suitable for 48/54 V applications such as those found in Data Centers, High Performance Computing and Cloud Computing applications for example, and the fully regulated output voltage of 12 V nominal (adjustable from 8–13.2 V) makes it suitable to be used to power downstream Point of Load (PoL) converters and integrated power stages such as the BMR510, as well as powering circuitry that needs a tightly regulated output.
Key Benefits
The BMR351 offers another alternative solution to Flex Power Modules’ customers when choosing an IBC for systems transitioning from legacy 12 V feeds to a 48 V feed. The fully regulated output and industry standard design makes it suitable for a wide variety of applications.
The BMR351 includes an Event Data Recorder feature (also known as a “Black Box”), which automatically stores essential operational condition information to a non-volatile memory in case of a fault/shutdown or catastrophic failure, which is hugely beneficial with fault diagnosis and failure analysis since it can be interrogated via the PMBus® interface.
An innovative transformer-coupled non-isolated topology reduces component count and current stresses, and delivers efficiency levels of up to 97.8%.
Paralleling of converters is supported using passive Dynamic Load Sharing (DLS), which enables multiple converters to be combined together to deliver higher power if required.
The BMR351 also includes over-voltage, under-voltage, over-current and over-temperature protection functions. As with all Flex Power Modules’ DC/DC converters, it complies with IEC/EN/UL 62368-1 safety standards.
The BMR351 includes a PMBus® interface for digital configuration, monitoring, and control, and is supported by our own Flex Power Designer tool.
