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Standard
24 V Inputs
Wide Range
48 V Input
R.E.
100V
32V
I.S.W.
Full Load
S.D.
100V
36V
160V
100V
60V
I.S.W.
Full Load
R.E.
S.D.
Normal Operating Area
21V 18V
0.1 1 10ms 100 1000
48 V Wide Range Input
276V
R.E.
I.S.W.
125V
100V
Full Load
S.D.
42V
0.1
800V
500V
Normal Operating Area
1 10ms 100
300 V Input
R.E.
I.S.W.
Full Load
S.D.
1000
+IN
+IN
–IN
–IN
EMI Filter
Vref 1
U2
OV
Vref
2
OC
U1
Level
Shift
Q1
D1
D2
Q2
C2
+OUT
GATE OUT
10V
PARALLEL
GATE IN
–OUT
76V
400V
36V
Normal Operating Area
S.D.
200V
Normal Operating Area
0.1
1
10ms
100
1000
0.1
1
10ms
100
1000
500ms
500ms
I.S.W.: Input surge withstand (no disruption of performance)
R.E.: Ratings exceeded
S.D.: Shut down
Figure 1 — Safe operating area based on input voltage of IAM
(1% duty refer to max., Zs=0.5 Ω ,
capability cycle specifications.) for short duration transient
4700 pF
Figure 2 — Block diagram of Input Attenuator Module (IAM)
+
–
F1
+In
+In
-In
-In
+Out
Gate In
Parallel
Gate Out
-Out
C1
F2
+In
Gate In
Gate Out
-In
VI-200/J00
VI-IAM
4700 pF
(F2) see — / VI-J00 application manual.
Figure 3 VI-200 Typical connection diagram. For recommended fuse
Input Voltage
Recommended Fuse
Input Voltage
Maximum Capacitance [a]
24 V
24 V “W”
48 V
48 V “N”
300 V
20 A / 32
20 A / 36
20 A / 60
20 A / 80
5 A / 250
V
V
V
V
V
(AGC-20)
(AGC-20)
(3AB-20)
(3AB-20)
Bussman PC-Tron
24 Vdc (21 – 32 V)
24 Vdc (18 – 36 V)
48 Vdc (42 – 60 V)
48 Vdc (36 – 76 V)
300 Vdc (200 – 400 V)
470 μF
470 μF
220 μF
120 μF
27 μF
Table 1 — Recommended F1 fusing based on input voltage (see Fig3)
[a]
Capacitance should be distributed across the input of each
DC-DC converter. (C1, Figure 3)
Table 2 — Recommended distributed capacitance on input of DC-
DC converter(s)
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
VI-IAM Input Attenuator Modules
Rev. 1.2
Page 3 of 5
Set your site on VICOR at www.vicorpower.com
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