VICOR PRM48JT480T500A00

The VI Chip PRM Regulator is a high efficiency converter, operating from a 45.0 to 55.0 Vdc input to generate a regulated 20.0 to 55.0 Vdc output. The ZVS buck-boost topology enables high switching frequency (∼1.03 MHz) operation with high conversion efficiency. High switching frequency reduces the size of reactive components enabling power density up to 1729 W/in³.

In a Factorized Power Architecture system, the PRM and downstream VTM current multiplier minimize distribution and conversion losses in a high power solution, providing an isolated, regulated output voltage.

The PRM48Jy480x500A00 has two selectable modes of regulation depending on the application requirements.

In Adaptive Loop Operation, the PRM48Jy480x500A00 utilizes a unique feed-forward scheme that enables precise regulation of an isolated POL voltage without the need for remote sensing and voltage feedback.

In Remote Sense Operation, the internal regulation circuitry is disabled, and an external control loop and current sensor maintain regulation. This affords flexibility in the design of both voltage and current compensation loops to optimize performance in the end application.

• Optimized for Post PFC operation with 48 V holdup capacitance
• 48.0 V nominal input non-isolated ZVS buck-boost regulator
• Transient operation down to 30.0 V for extended holdup during line dropout
• 20.0 V to 55.0 V adjustable output range
• 500 W output power in 1.11 in² footprint
• 97.8% typical efficiency, at full load
• 1729 W/in³ (106 W/cm³) Power Density
• 4.01 MHrs MTBF (MIL-HDBK-217 Plus Parts Count)
• Pin selectable operating mode Adaptive Loop Remote Sense / Child Operation
• Full VI Chip Package 32.5 mm×22.0 mm×6.73 mm Optimized for use with PFM based Isolated AC-48 V DC Converters

• High Density Power Supply AC-DC rail outputs
• High Density ATE system AC-DC power
• Telecom NPU and ASIC core power
• Communications Systems
• Non-isolated and isolated power converters