CUI - 720 W Isolated DC-DC Quarter Brick Based on New Power Topology

CUI’s Solus Topology integrates a conventional buck converter into a SEPIC converter to form a totally new SEPIC-fed buck converter; a patented single stage topology with one magnetic element, one control switch and two commutation switches that are optimally controlled by pulse-width modulation (PWM). With lower voltage and current stresses in the topology coupled with an inherent GCE (gate charge extraction) process, Solus is able to reduce switching turn-on losses by 75% and switching turn-off losses by 99% on the control FET when compared to a conventional buck converter. The Solus Topology further increases total efficiency by distributing the energy delivery into multiple paths, reducing circuit conduction losses by nearly 50%. With these advantages, CUI is now in a position to develop a wide range of ac-dc and dc-dc power conversion platforms with greatly improved energy efficiency, faster transient response and increased power density versus the leading designs currently on the market.

“This is the first product of many that will be based on the Solus Topology. The flexibility of the Solus Topology will allow us to not only incorporate it into an isolated dc-dc solution, but will also move to our non-isolated dc-dc and ac-dc product roadmaps,” said Mark Adams, CUI’s VP of Advanced Power Marketing.

“In today’s green world where efficiency and density is king, we believe our Solus Topology will be a difference maker in the market for years to come,” concluded Adams.

CUI has been sampling the NQB product to select customers and will continue to provide engineering samples to select customers until full production release in Q1 2012.