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General Specifications
Part Numbering
V?I Chip Regulator
P
Regulator
024
Input Voltage
Designator
F
Configuration
F = J-lead
T = Through hole
048
Nominal
Factorized Bus
Voltage
T
Product Grade Temperatures (°C)
Grade Storage Operating (T J )
T -40 to125 -40 to125
12
Output Power
Designator
(=P f /10)
AL
AL = Adaptive Loop
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 VTM output voltage, Vout; R CD is set
to a value that compensates for the output r esistance 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 V?I 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 .
V C
V H
0.01 μF
P C
T M
S C
S G
Factorized
+In
+Out
10 k Ω
I L
N C
P R
PRM? -AL
Module
+I n +O u t
O S
N C
C D
R OS
R CD
Bus (V F )
0.4 μH
TM
VC
PC
+Out
VTM?
Module
– Out
L
O
A
V IN
–I n
–O u t
10 Ω
– In
K
Ro
– Out
D
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.
Desired Load Voltage (Vdc)
1.0
1.2
1.5
1.8
2.0
3.0
3.3
5.0
8.0
9.6
10
12
15
24
28
36
48
VTM P/N (1)
V048F015T100
V048F015T100
V048F015T100
V048F020T080
V048F020T080
V048F030T070
V048F040T050
V048F060T040
V048F080T030
V048F096T025
V048F120T025
V048F120T025
V048F160T015
V048F240T012
V048F320T009
V048F480T006
V048F480T006
Max VTM Output Current (A) (2)
100
100
100
80
80
70
50
40
30
25
25
25
15
12.5
9.4
6.3
6.3
R OS (k Ω ) (3)
3.57
2.94
2.37
2.61
2.37
2.37
2.89
2.87
2.37
2.37
2.86
2.37
2.49
2.37
2.74
3.16
2.37
R CD ( Ω ) (3)
26.1
32.4
39.2
35.7
39.2
39.2
32.6
33.2
32.9
32.9
32.9
39.2
37.4
39.2
35.7
30.1
39.2
Note:
(1) See Table 2 on page 9 for nominal V out range and K factors.
(2) See “PRM output power vs. VTM output power” on Page 10
(3) 1% precision resistors recommended
Table 1 — Configure your Chip Set using the PRM-AL
vicorpower.com
800-735-6200
V?I Chip Regulator
P024F048T12AL
Rev. 3.1
Page 2 of 14
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