Introducing CUI's Solus^® Power Topology

CUI Inc's patented Solus Power Topology provides advantages across a range of ac-dc and dc-dc power conversion platforms through a significant reduction in switching losses within a PWM circuit. Very simply, the Solus Topology combines the single-ended primary-inductor converter (SEPIC) with the conventional buck topology to form the SEPIC-fed buck converter. Lower voltage and current stresses in the topology coupled with an inherent GCE (gate charge extraction) process allows Solus 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. Total efficiency is further increased by distributing the energy delivery into multiple paths, reducing circuit conduction losses by nearly 50%. The rich feature set of the Solus Topology is allowing CUI to accelerate the performance trend trajectories for the big-four power conversion needs: higher power density, higher efficiency for “greener” systems, faster transient response, and lower EMI.

Substantial Reduction in Switching Losses

Substantial Reduction in Conductivity Losses

Realized Benefits in Upcoming CUI Power Module Designs

• Greater Efficiency
• Higher Power Density
• Reduced EMI (electro-magnetic interference)
• Reduced Output Capacitor Requirements
• Reduced Switching Loss
• Faster Transient Response (4X as fast)
• Fast Turn-on (1 ms to fully turn-on full load)