90A digital point-of-load DC/DC converter

March 17, 2015 // By Graham Prophet
Calling it a product milestone on the journey to the Software-Defined Power Architecture, Ericsson Power Modules has introduced a 90A dual-phase point-of-load DC/DC converter that can be connected in parallel, delivering up to 360A.

The two-phase 90A 3E* digital point-of-load (POL) DC/DC power module offers compensation-free performance to advanced network-processors that require high performance in power delivery and high levels of software control to improve flexibility. These capabilities make the BMR465 ready for future Software-Defined Power Architecture (SDPA) systems, which power system architects foresee as the way forward to achieving highly efficient and energy-optimised network architectures by 2020.

The BMR465 POL converter can be operated as a standalone unit delivering 90A, as well as being part of a larger power system when processor boards require higher current. Built on a two-phase topology, four BMR465 modules can be connected in parallel together to deliver up to 360A. The BMR465 modules can become part of a multi-module and multiphase (up to eight-phase) power system that enables phase spreading, a reduction of peak current and also the amount of capacitors required by end systems.

The BMR465 is fully compliant with PMBus commands and has been integrated into the Ericsson Power Designer software, allowing systems architects to simulate and configure complete multi-module and multiphase systems prior to implementation.

Ericsson comments that the Software-Defined Power Architecture is being seen in the industry as the best way forward to optimise energy utilization in data networks and make them more energy efficient. The optimisation of energy down to a granular level was at the origin of Ericsson’s digital power research, which was started in 2004. BMR465 also complies with the new ‘teraAMP’ standard from the Architects of Modern Power (AMP) group of companies, which guarantees customers multiple sources of interoperable products.

BMR465 integrates ‘compensation-free’ modulation techniques, which automatically provide stability, accurate line and load regulation and good transient performance for a wide range of operating conditions. The non-linear charge mode control guarantees the control loop is always stable and the load step response within a single switching cycle confers stability while requiring minimum filtering capacitors.

Operating from a 7.5V to 14V