BMR458 Digital Quarter-Brick Advanced Bus Converter

Flex Power Modules' BMR458 is available in two input voltage variants: one for the telecom market with a typical input range from 36 V to 75 V and another for the datacom market with an input range of 40 V to 60 V. Both variants are designed to meet the demands of high-end and high-power applications based on intermediate bus conversion (IBC) and dynamic bus voltage (DBV) architectures. The units output current monitoring of ±1 A delivers highly accurate system monitoring capability.

The module is ideal for high-power applications that are powered by multi-cell batteries or rectifiers commonly used in the ICT industry and employ IBC or DBV architectures.

The BMR458 comes with a host of features. The module delivers an output up to 650 W, thereby reducing the number of required modules in very high power applications and highly accurate current sharing, as well as active- or droop-current sharing. Other key features including dynamic load compensation, adjustable V_OUT, snapshot parameter capture, and a PMBus v1.3 interface.

Key electrical characteristics of the module include high efficiency of up to 96.6% at half load and 96.3% at full load, maximum current output of 54.2 A, tightly regulated 12 V output (±2 mV, typical) across the 40 V to 60 V input voltage range, output current monitoring of ±1 A to enable highly accurate system monitoring capability, and a fast transient recovery time of only 1 ms.

Further specifications include an MTBF of 8.2 million hours and I/O functional isolation of 2250 V_DC, which meets the latest IEC/EN/UL60905 safety standard.

Application Areas:

• Information and communication technology (ICT) applications, including datacom, telecom, and server/storage systems