The BMR458 comes with a wide range of features such as what is thought to be the highest power delivery (650W) for a quarter-brick advanced bus converter; highly accurate current sharing, as well active- or droop-current sharing. Other features include: dynamic load compensation, snapshot parameter capture, and a PMBus v1.3 interface.
Key electrical characteristics include efficiency of up to 96.6% at half load and 96.3% at full load; maximum current output of 54.2A; tightly regulated 12V output (+/–2mV, typical) across the 40 to 60V input voltage range; output current monitoring of +/-1A to enable highly accurate system monitoring capability; and a fast transient recovery time of only 1ms.
Further specifications include: an MTBF of 8.2 million hours; and I/O functional isolation of 2250Vdc, which meets the latest IEC/EN/UL60905 safety standard.
The module’s dynamic bus voltage capability is important for the most advanced power systems and enables the module’s output voltage to be adjusted to suit the load, thereby maximising overall system efficiency and reducing energy consumption. The module also delivers highly accurate current sharing with both active and droop options for paralleling up to more than six modules, delivering higher reliability and greater available power.
The BMR458’s dynamic load compensation (DLC) feature adjusts the control loop to meet the capacitance load.
Further important features include: the snapshot parameter capture analysis tool, which stores the last known measurement; adaptive ramp time, which modifies ramp time to suit output capacitive load; and automatic backward current protection when paralleling modules, which simplifies OR’ing circuitry.
Available in the industry-standard quarter-brick format with dimensions of 57.9 x 36.8 x 12.7mm (2.28 x 1.45 x 0.5in), the module operates comfortably in challenging thermal environments.
