The Ericsson quarter brick advanced bus converter module high power control and delivery

Ericsson Power Modules today announces the BMR458, a third-generation 3E* quarter-brick advanced bus converter that targets system architects developing equipment for Information and Communication Technology (ICT) applications, including datacom and server and storage systems. 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 intermediate bus conversion (IBC) or dynamic bus voltage (DBV) architectures.


The BMR458 represents the cutting edge of technology for advanced bus converters and comes with a host of features. These include the highest power delivery (650 W) in the industry for a 57.9 x 36.8 x 12.7-mm quarter-brick advanced bus converter, thereby reducing the number of required modules in very high power applications; and highly accurate current sharing, as well as it being the only advanced bus converter available today to offer active- or droop-current sharing. Other key features including dynamic load compensation, snapshot parameter capture, and a PMBus version 1.3 interface.


  • New third-generation BMR458 quarter-brick advanced bus converter delivers up to 650W for range of Information and Communication Technologies (ICT) applications
  • Tightly regulated output voltage over the full operational input range of 40V to 60V
  • Designed to meet the demands of high-end and high power applications based on intermediate bus conversion (IBC) and dynamic bus voltage (DBV) architectures
  • Output current monitoring of ±1A, delivers highly accurate system monitoring capability


Key electrical characteristics of the module include 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 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 Mh; and I/O functional isolation of 2,250 Vdc, which meets the latest IEC/EN/UL60905 safety standard.


The module’s dynamic bus voltage capability enables the module’s output voltage to be adjusted to suit the load to maximize efficiency. The module features current sharing with both active and droop options for paralleling up to more than six modules.


The dynamic load compensation (DLC) feature adjusts the control loop to meet the capacitance load. Additional features include a snapshot parameter capture analysis tool, which stores the last known measurement; an 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. The module is also available with an optional baseplate, enabling connection to a heatsink or cold plate for the most extreme environments.


Ericcson Power Modules: www.ericsson.com/powermodules

Power Supplies & Energy Storage Power Supplies & Energy Storage News

Related Posts

No Comments

Join the conversation!

Error! Please fill all fields.