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Not Recommended for New Designs
P045F048T32AL
PRM TM
Regulator
? 45 V input V?I Chip TM PRM
? Adaptive Loop feedback
? Vin range 38 – 55 Vdc
? High density – 1084 W/in 3
? ZVS buck-boost regulator
? 1.0 MHz switching frequency
Vin = 38 – 55 Vdc
?
? Small footprint – 1.11
in 2
? 97% efficiency
V f = 26 – 55 Vdc
? Low weight – 0.5 oz (15 g)
? 125?C operation (Tj)
P f = 320 W
I f = 6.67 A
Product Description
Absolute Maximum Ratings
The V?I Chip regulator is a very efficient non-isolated
regulator capable of both boosting and bucking a wide
range input voltage. It is specifically designed to provide
a controlled Factorized Bus distribution voltage for
powering downstream VTM TM Transformer — fast,
efficient, isolated, low noise Point-of-Load (POL)
converters. In combination, PRMs and VTMs TM form a
complete DC-DC converter subsystem offering all of
the unique benefits of Vicor’s Factorized Power
Architecture TM (FPA) TM : high density and efficiency; low
noise operation; architectural flexibility; extremely fast
transient response; and elimination of bulk capacitance
at the Point-of-Load (POL).
In FPA systems, the POL voltage is the product of the
Factorized Bus voltage delivered by the PRM and the
"K-factor" (the fixed voltage transformation ratio) of a
downstream VTM. The PRM controls the Factorized Bus
voltage to provide regulation at the POL. Because VTMs
perform true voltage division and current multiplication,
the Factorized Bus voltage may be set to a value that is
Parameter
+In to -In
PC to -In
PR to -In
IL to -In
VC to -In
+Out to -Out
SC to -Out
VH to -Out
OS to -Out
CD to -Out
SG to -Out
Continuous output current
Continuous output power
Case temperature during reflow
Operating junction temperature
Storage temperature
Values
-1.0 to 59.0
-0.3 to 6.0
-0.3 to 9.0
-0.3 to 6.0
-0.3 to 18.0
-0.3 to 59
-0.3 to 3.0
-0.3 to 9.5
-0.3 to 9.0
-0.3 to 9.0
100
6.67
320
225
245
-40 to 125
-40 to 125
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mA
Adc
W
°C
°C
°C
°C
Notes
MSL 5
MSL 6
T-Grade
T-Grade
substantially higher than the bus voltages typically
found in "intermediate bus" systems, reducing
distribution losses and enabling use of narrower
distribution bus traces. A PRM-VTM chip set can provide
up to 100 A or 300 W at a FPA system density of
DC-DC Converter
169 A/in 3 or 508 W/in 3 — and because the PRM can be
located, or "factorized," remotely from the POL, these
power densities can be effectively doubled.
The PRM described in this data sheet features a unique
0.01 μF
10 k Ω
V C
P C
T M
I L
N C
P R
PRM? -AL
Module
+I n +O u t
V H
S C
S G
O S
N C
C D
R OS
R CD
Factorized
Bus (V F )
0.4 μH
+In
TM
VC
PC
+Out
+Out
VTM?
Module
– Out
L
O
A
"Adaptive Loop" compensation feedback: a single wire
alternative to traditional remote sensing and feedback
V IN
–I n
–O u t
10 Ω
– In
K
Ro
– Out
D
loops that 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.
The P045F048T32AL is used with any 048 input series VTM to provide a regulated and
isolated output.
vicorpower.com
800-735-6200
V?I Chip Regulator
P045F048T32AL
Rev. 2.5
Page 1 of 14
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