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Regulator facilitates direct 48 V-to-load power conversion with 91% efficiency

16th March 2007

Vicor UK

ES Admin

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Vicor has introduced a high power (>1100 W/in3) 320W PRM non-isolated regulator. Designated P045F048T32AL, this latest V•I Chip component is designed for high-performance 48V power applications such as servers, telecom and ATE. It provides a controlled Factorized Bus distribution voltage for powering downstream VTM current multipliers, creating fast, efficient, isolated, low-noise Point-of-Load (POL) converters. With an efficiency of 97% and matched with a 94% VTM unit, it enables direct 48 V-to-load with 91% efficiency, eliminating the need for an intermediate 12 V bus conversion stage and VRMs.

In combination, PRMs and VTMs form a complete DC-DC converter subsystem offering all of the unique benefits of Vicor’s Factorized Power Architecture (FPA): high density and efficiency, low-noise operation, architectural flexibility, extremely fast transient response, and elimination of bulk capacitance at the point of load. A PRM+VTM chip set provides up to 100 A or 300 W for a 48 V-direct-to-load density of over 500 W/in3. Alternatively, the PRM regulator may be used independently if isolation is not required.

The P045F048T32AL features unique Adaptive Loop compensation feedback. This single-wire alternative to traditional remote sensing and feedback loops enables precise control of an isolated POL voltage without the need for either a direct connection to the load or for noise-sensitive, bandwidth-limiting, isolation devices in the feedback path.