New variants added to quarter-brick DC-DC range

31-03-2022 | Flex Power Module | Power

Flex Power Modules has expanded its BMR491 range of digital, quarter-brick DC-DC converters with two new variants. Power ratings now obtainable are 1400W continuous/2400W peak (BMR4912307/856) and 1540W continuous/2450W peak (BMR4913208/857).

The new variants provide the company's 'Hybrid Regulated Ratio (HRR)' technique where output voltages vary in a ratio to the input voltage but not with load current, optimising efficiency and EMI filtering. The modules are able to switch between this mode and full output regulation at a pre-set input voltage to limit the total variation of output voltage. As a result, the new variants offer improved efficiency of up to 97.5% at 50% load. Output voltages are centred around 12V for input ranges that include 48-56V and 40-60V for data centre applications.

The BMR4912307/856 variant has a smaller height of 13.4mm for space-constrained applications. The variants possess an Event Data Recorder function or 'Black Box', which captures key date-stamped operational parameters for straightforward fault tracing and failure analysis through a shutdown event.

All modules offer an operational temperature range of -40C to +125C, 1500V input-output 'basic' isolation complying with IEC/EN/UL 62368-1, and complete protection against over over-temperature, input under-voltage and output over-voltage, over-current and short circuits.

A four-pin PMBus digital interface is supplied, and the products are supported by the freely available 'Flex Power Designer' software for remote configuration, control and monitoring.


Anders Sellin, product manager of Flex Power Modules, comments, "More and more customers are asking us for peak power handling capabilities to support ever more dynamic loads, and we are responding with several solutions now, including the BMR491 series. Employing our HRR technique makes them even more efficient as well - a winning combination."

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