New BMR481 DC-DC Converter from Flex Power Modules Comes with Direct Conversion Technology

Press Release Summary:

The BMR481 DC-DC Converter features an input of 40-60 V and programmable 0.5-1.35 V output. The converter is equipped with a direct conversion module that delivers 92% efficiency from a 1 V output at 53 V. The modules automatically enable and disable phase depending on the required load with dynamic voltage adjustment. The converter is controlled digitally using PMBus v1.3 interface and features an isolation of 1500 VDC. The main module comes in 12 x 27.7 mm footprint and provides a maximum output current of 70 A.

Original Press Release:

Flex Power Modules Targets Emerging Direct Conversion Market with Class-Leading Isolated DC-DC Converter

• 48V-to-Load Direct Conversion technology addresses demands of next generation data centers 
• Enabling more compact, higher efficiency and cost-effective power system implementations
• Flex Power Modules positioning itself as the driving force in this sector 

Flex Power Modules introduces its first generation of Direct Conversion products to address the growing need for higher energy efficiency levels in data center and cloud computing infrastructure. The new BMR481 DC-DC converter has an input range of 40-60V targeting 48-54V nominal supplies, and a programmable 0.5-1.35V output. The 12 x 27.7mm footprint ‘main’ module provides a maximum output current of 70A and also incorporates a digital interface for monitoring, configuration and control purposes. This main unit can then be supported by up to 5 additional ‘satellite’ modules, resulting in a total current rating that reaches 420A.

The single-stage BMR481 provides an attractive alternative to the conventional two-stage intermediate bus converter (IBC) and point of load (POL) architecture – where an extra conversion step is required, which thereby takes up greater space and impacts operational performance. In contrast, this new groundbreaking Direct Conversion module presents engineers with a far more streamlined and economical solution. It is capable of achieving up to 92% efficiency from a 1V output at 53V in – which is 2-3% higher than what an equivalent IBC-based deployment can deliver. It also allows a reduction in board area of up to 50%. MTBF is in excess of 8.7Mhrs for the main module.  

Optimized efficiency is achieved by automatic enabling and disabling of phases/satellite modules depending on the required load, along with dynamic voltage adjustment to provide optimum supply rails to connected ICs. Output ripple and noise is extremely low, typically 1mV p-p, due to the zero voltage/zero current switching employed. Load and line regulation are typically kept to just 1mV. At 53V input and 0.5V output, the full 70A output current is available from the main module to over 75°C ambient temperature with 0.5m/s airflow and to over 90°C with just 2m/s airflow. Full digital control is implemented with a PMBus v1.3 interface compliant with PMBus or AVS / SVID. Isolation is rated at 1500VDC (functional).

Olle Hellgren, Director Product Management and Business Development at Flex Power Modules, commented: “Direct Conversion will be pivotal in stopping data center capital and operational costs from spiraling, as well as enabling increasingly stringent energy efficiency guidelines to be met. This is being made possible by eliminating the 12V intermediate level conversion stage in order to boost efficiency, along with utilizing less board space. With the BMR 481, Flex is pushing forward the proliferation of Direct Conversion, and demonstrating the huge potential of this new power conversion architecture.”  

The BMR 481 is currently being sampled by key customers.

About Flex Power Modules

Flex Power Modules, a division of Flex (NASDAQ: FLEX), designs and manufactures scalable power supply solutions that improve the operational efficiencies of advanced data center, IT information and communications networks. Flex Power Modules’ products provide a complete on-board system solution for cloud, storage and server applications and address customer challenges while delivering superior quality, cost and performance at scale.

About Flex
Flex is the Sketch-to-Scale® solutions provider that designs and builds Intelligent Products for a Connected World™. With approximately 200,000 professionals across 30 countries, Flex provides innovative design, engineering, manufacturing, real-time supply chain insight and logistics services to companies of all sizes in various industries and end-markets. For more information, visit flex.com or follow us on Twitter @Flexintl. Flex – Live Smarter™

Contact for editorial information:

Nayl D’Souza, Account Director, Publitek Email: nayl.dsouza@publitek.com

Contact for company information:

Tuuli Waern, Technical Marketing Manager, Flex Power Modules Email: tuuli.waern@flex.com