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Datasheet: V048F480T006 (Vicor Corporation)

VI Chip - PRM-AL Pre-Regulator Module

 

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Vicor Corporation
vicorpower.com
800-735-6200
VI Chip Pre-Regulator Module
P048F048T12AL
Rev. 1.0
Page 1 of 14
PRELIMINARY
48 V input VI Chip PRM
Vin range 36 75 Vdc
High density 438 W/in
3
Small footprint 110 W/in
2
Low weight 0.5 oz (14 g)
Adaptive Loop feedback
ZVS buck-boost regulator
1.5 MHz switching frequency
96% Efficiency
125C operation
P048F048T12AL
Vin = 36 75 V
V
f
= 26 55 V
P
f
= 120 W
I
f
= 2.5 A
VI Chip
TM
PRM-AL
Pre-Regulator Module
Product Description
The VI Chip Pre-Regulator Module (PRM) 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
VI Chip Voltage Transformation Modules (VTMs) --
fast, efficient, isolated, low noise Point-of-Load (POL)
converters. 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 (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
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 115 W at a FPA system density
of 200 A/in
3
, or 230 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
"Adaptive Loop" compensation feedback: a single wire
alternative to traditional remote sensing and feedback
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.
Actual size
Parameter
Values
Unit
+In to -In
-1.0 to 85.0
Vdc
PC to -In
-0.3 to 6.0
Vdc
PR to -In
-0.3 to 9.0
Vdc
IL to -In
-0.3 to 6.0
Vdc
VC to -In
-0.3 to 18.0
Vdc
+Out to -Out
-0.3 to 59
Vdc
SC to -Out
-0.3 to 3.0
Vdc
VH to -Out
-0.3 to 9.5
Vdc
OS to -Out
-0.3 to 9.0
Vdc
CD to -Out
-0.3 to 9.0
Vdc
SG to -Out
100
mA
Continuous output current
2.5
Adc
Continuous output power
120
W
Operating junction temperature
(M-Grade)
-55 to 125
C
(T-Grade)
-40 to 125
C
Storage temperature
(M-Grade)
-65 to 150
C
(T-Grade)
-40 to 150
C
Case temperature during reflow:
208
C
-In
PC
VC
TM
+In
-Out
+Out
VTM
+Out
-Out
K
Ro
+Out
Out
+In
In
VC
PC
TM
IL
VH
PR
NC
SG
SC
PRM-AL
OS
NC
CD
Factorized
Bus (V
f
)
Vin
Vout
The P048F048T12AL is used with any 048 input series VTM to provide a regulated and
isolated output.
DC-DC Converter
Absolute Maximum Ratings
PRM
vicorpower.com
800-735-6200
VI Chip Pre-Regulator Module
P048F048T12AL
Rev. 1.0
Page 2 of 14
PRELIMINARY
Overview of Adaptive Loop Compensation
Adaptive Loop compensation, illustrated in Figure 1, contributes to
the bandwidth and speed advantage of Factorized Power. The PRM
monitors its output current and automatically adjusts its output
voltage to compensate for the voltage drop in the output
resistance of the VTM. R
OS
sets the desired value of the VTM
output voltage, Vout; R
CD
is set to a value that compensates for
the output resistance of the VTM (which, ideally, is located at the
point of load). For selection of R
OS
and R
CD
, refer to Table 1 below
or Page 9.
The VI Chip's bi-directional VC port :
1. Provides a wake up signal from the PRM to the VTM that
synchronizes the rise of the VTM output voltage to that of the PRM.
2. Provides feedback from the VTM to the PRM to enable the PRM
to compensate for the voltage drop in VTM output resistance, R
O
.
-In
PC
VC
TM
+In
-Out
+Out
VTM
+Out
-Out
K
Ro
+Out
Out
+In
In
VC
PC
TM
IL
VH
PR
NC
SG
SC
PRM-AL
OS
NC
CD
L
O
A
D
Factorized
Bus (V
f
)
Vo = V
L
1.0%
(IoRo)
K
V
f
=
V
L
+
K
Vin
R
OS
R
CD
Output Power
Designator
(=P
f
/10)
P
048
F
048
T
12
AL
Pre-Regulator
Module
Input Voltage
Designator
Product Grade Temperatures (C)
Grade
Storage
Operating
T
-40 to150 -40 to125
M
-65 to150 -55 to125
Configuration
(Fig.21)
Nominal
Factorized Bus
Voltage
AL = Adaptive Loop
Desired Load Voltage (Vdc)
VTM P/N
(1)
Max VTM Output Current (A)
(2)
R
OS
(k)
(3)
R
CD
()
(3)
1.0
V048F015T100
100
3.57
26.1
1.2
V048F015T100
100
2.94
32.4
1.5
V048F015T100
100
2.37
39.2
1.8
V048F020T080
80
2.61
35.7
2.0
V048F020T080
80
2.37
39.2
3.3
V040F033T060
60
2.89
32.6
5.0
V048F060T040
40
2.87
33.2
10
V048F120T025
25
2.86
32.9
12
V048F120T025
25
2.37
39.2
15
V048F160T019
18.8
2.49
37.4
24
V048F240T012
12.5
2.37
39.2
28
V048F320T009
9.4
2.74
35.7
36
V048F480T006
6.3
3.16
30.1
48
V048F480T006
6.3
2.37
39.2
Table 1 -- Configure your Chip Set using the PRM-AL
Note:
(1) Verify the configuration option and product grade temperature before ordering as shown above.
(2) See "PRM output power vs. VTM output power" on Page 10
(3) 1% precision resistors recommended
Figure 1 -- With Adaptive Loop control, the output of the VTM is regulated over the load current range with only a single interconnect between the PRM and
VTM and without the need for isolation in the feedback path.
General Specifications
VI Chip Pre-Regulator Module
Part Numbering
vicorpower.com
800-735-6200
VI Chip Pre-Regulator Module
P048F048T12AL
Rev. 1.0
Page 3 of 14
PRELIMINARY
Parameter
Min
Typ
Max
Unit
Note
Input voltage range
36
48
75
Vdc
Input dV/dt
1
V/s
Input undervoltage turn-on
33.8
35.3
Vdc
Input undervoltage turn-off
30.5
31.8
Vdc
Input overvoltage turn-on
75.8
77.3
Vdc
Input overvoltage turn-off
78.8
81.0
Vdc
Input quiescent current
0.5
1
mA
PC low
Input current
2.6
Adc
Input reflected ripple current
280
mA p-p
See Figures 4 & 5
No load power dissipation
2
4
W
Internal input capacitance
5
F
Ceramic
Recommended external input capacitance
100
F
See Figure 5 for input filter circuit.
Source impedance dependent
Input Specs
(Conditions are at 48 Vin, 48 Vf, full load, and 25C ambient unless otherwise specified)
Figure 3 -- Vf turn-on waveform with inrush current PC enabled at
full load, 48 Vin
Figure 2 -- Vf and PC response from power up
Figure 4 -- Input reflected ripple current at full load and 48 Vin
Input Waveforms
+IN
IN
+Out
Out
+In
In
VC
PC
TM
IL
VH
PR
NC
SG
SC
PRM-AL
OS
NC
CD
100
F
Al-Electrolytic
Reflected
Ripple
Measurement
2.37 k
+ OUT
OUT
10 A
Figure 5 -- Input filter capacitor recommendation
Electrical Specifications
VI Chip Pre-Regulator Module
vicorpower.com
800-735-6200
VI Chip Pre-Regulator Module
P048F048T12AL
Rev. 1.0
Page 4 of 14
PRELIMINARY
Parameter
Min
Typ
Max
Unit
Note
Output voltage range
26
48
55
Vdc
Factorized Bus voltage (Vf) set by R
OS
Output power
0
120
W
Output current
0
2.5
Adc
DC current limit
2.6
3.0
3.3
Adc
I
L
pin floating
Average short circuit current
0.5
A
Auto recovery
Set point accuracy
1.5
%
Line regulation
0.1
0.2
%
Low line to high line
Load regulation
0.1
0.2
%
No CD resistor
Load regulation (at VTM output)
1.0
2.0
%
Adaptive Loop
Current share accuracy
5
10
%
Efficiency
Full load
95.6
%
See Figure 6,7 & 8
Output overvoltage set point
56
59.4
Vdc
Output ripple voltage
No external bypass
1.0
2.0
%
Factorized Bus, see Figure 13
With 10 F capacitor
0.5
1.0
%
Factorized Bus, see Figure 14
Switching frequency
1.35
1.45
1.55
MHz
Fixed frequency
Output turn-on delay
From application of power
200
300
ms
See Figure 2
From PC pin high
100
s
See Figure 3
Internal output capacitance
5
F
Ceramic
Factorized Bus capacitance
47
F
Output Specs
(Conditions are at 48 Vin, 48 Vf, full load, and 25C ambient unless otherwise specified)
Electrical Specifications
(continued)
VI Chip Pre-Regulator Module
vicorpower.com
800-735-6200
VI Chip Pre-Regulator Module
P048F048T12AL
Rev. 1.0
Page 5 of 14
PRELIMINARY
Efficiency vs. Output Current
60
65
70
75
80
85
90
95
100
0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
Output Current (A)
Efficiency (%)
36V
48V
75V
Vin
Figure 8 -- Efficiency vs. output current at 26 Vf
Electrical Specifications
(continued)
VI Chip Pre-Regulator Module
Efficiency vs. Output Current
75
80
85
90
95
100
0.25 0.50
0.75
1.00 1.25
1.50 1.75 2.00 2.25 2.50
Output Current (A)
Efficiency (%)
36V
48V
75V
Vin
Figure 6 -- Efficiency vs. output current at 48 Vf
Efficiency vs. Output Current
70
75
80
85
90
95
100
0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
Output Current (A)
Efficiency (%)
26V
48V
75V
Vin
Figure 7 -- Efficiency vs. output current at 36 Vf
Efficiency Graphs
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