PRM48JH480X250A00 Datasheet, PDF (1/44 Pages) Vicor Corporation – Pin selectable operating mode

Features
• 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
• 250 W output power in 0.57 in² footprint
• 96.7% typical efficiency, at full load
• 1676 W/in³ (102 W/cm³) Power Density
• 5.29 MHrs MTBF (MIL-HDBK-217 Plus Parts Count)
• Pin selectable operating mode
Adaptive Loop
Remote Sense / Slave
• Half VI Chip^® Package
22.0mm x 16.5mm x 6.73mm
• Optimized for use with PFM based
Isolated AC-48 V DC Converters
Typical Applications
• 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
PRM^TM Regulator
for Post PFC Operation
PRM48JH480x250A00
S
C NRTL US
High Efficiency Converter
Product Ratings
V_IN = 45.0 V to 55.0 V
V_OUT = 48.0 V
(20.0 V to 55.0 V Trim)
P_OUT = 250 W
I_OUT = 5.21 A
Product Description
The VI Chip® PRM^TM Regulator is a high e ciency 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 e ciency. High switching frequency reduces the
size of reactive components enabling power density up to
1676 W/in³.
The Half VI Chip® package is compatible with standard pick-
and-place and surface mount assembly processes with a planar
thermal interface area and superior thermal conductivity.
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 PRM48JH480x250A00 has two selectable modes of
regulation depending on the application requirements.
In Adaptive Loop Operation, the PRM48JH480x250A00 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 a ords flexibility in the design of both
voltage and current compensation loops to optimize
performance in the end application.
PRM^TM Regulator
Page 1 of 44
Rev 1.2
11/2015
vicorpower.com
800 927.9474