Electronic Products & Technology

Quarter-brick dc-dc converter delivers peak power to 2450W

March 29, 2022  Stephen Law

FLEX POWER MODULES BMR491 range of digital, quarter-brick dc-dc converters delivers variants with power ratings available in 1400W continuous / 2400W peak (BMR4912307/856), and 1540W continuous / 2450W peak (BMR4913208/857). Units feature firm’s ‘Hybrid Regulated Ratio (HRR)’ technique where output voltages vary in a ratio to the input voltage but not with load current, optimizing efficiency and EMI filtering. Modules can switch between this mode and full output regulation at a pre-set input voltage, to limit total variation of output voltage. As a result, both new variants feature improved efficiency of up to 97.5% at 50% load. Output voltages are centered around 12V for input ranges that include 48-56V and 40-60V for data center applications.

BMR4912307/856 variant has a reduced height of 13.4 mm for space-constrained applications. Both variants include an Event Data Recorder function or ‘Black Box’ which captures key date-stamped operational parameters during a shutdown event for easy fault tracing and failure analysis. Units feature an operational temperature range of -40°C to +125°C, 1500 V input-output ‘basic’ isolation complying with IEC/EN/UL 62368-1, and full protection against over over-temperature, input under-voltage and output over-voltage, over-current and short circuits.

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