New Ericsson Advanced Bus Converter Ideal for Network-Attached-Storage Applications

First digitally controlled Advanced Bus Converter designed to power RAID and NAS hard-disk applications with high-capacitance loads up to 15 millifarads
Output tightly regulated +/-2% over the full input range and any load condition
Dedicated firmware guaranteeing voltage integrity and stability during start-up
Ericsson has launched the industry’s first digitally controlled Advanced Bus Converter specifically aimed at powering Redundant Array of Independent Disks (RAID) and Network Attached Storage (NAS) hard-disk applications that operate with high capacitive loads up to 15 millifarads (mF). Based on the Ericsson 3E* FRIDA II platform, the BMR456 ‘High-Cap’ series (BMR4560004/018) guarantees stable and accurate 12V bus voltage over the full input-voltage range.

RAID and NAS applications developed for datacenters are designed for high performance and reliability and require very stable and smooth bus voltages without disturbances, such as voltage glitches or delays that result from power sources operating with current-mode limitations. Designers will commonly use large arrays of capacitors, often resulting in an average value of 12 to 15 mF, to secure that the bus voltages delivered to hard disks and other sub-assemblies are exempt from noise.

"Designing a product of this nature in a traditional way would require significant hardware modifications and could mean many months work," said Patrick Le Fèvre, Marketing and Communication Director, Ericsson Power Modules. "However, the flexibility offered by the FRIDA II platform and its Ericsson Energy and Performance Optimizer firmware has made this possible in significantly less time, thereby reducing time-to-market for our customers. The BMR456 High-Cap Advanced Bus Converter is an excellent representation of the benefits offered by digital power and the unprecedented level of flexibility offered to board and systems designers."

The BMR4560004/018 has an output power of 420W and a flat efficiency of 96% from low to high load, guaranteeing the lowest power dissipation at any point of load and contributing to reduced energy consumption and total-cost-of-ownership for end customers. Designed to be fully integrated and optimized in the energy optimization chain, the BMR4560004/018 includes a USER_STORE memory block, which can be used by system designers to store their own customized configuration files to profile BMR456 High-Cap behavior to match certain conditions.

* Enhanced Performance, Energy Management, and End-user Value are the key benefits delivered by Ericsson’s range of 3E digitally controlled DC/DC converters.