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B048F120T15 Datasheet

  • B048F120T15

  • VI Chip - BCM Bus Converter Module

  • 16頁

  • VICOR   VICOR

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Configuration Options (Cont.)
21.5
0.85
PRELIMINARY
22.0
0.87
32.0
1.26
32.0
1.26
11.7
0.46
14.0
0.56
IN鈥揃OARD MOUNT
with 0.25'' Pin Fins
(V鈥 Chip recessed into PCB)
mm
in
ON鈥揃OARD MOUNT
with 0.25'' Pin Fins
mm
in
Figure 22鈥?/div>
In-board with pin fins 鈥?package L
Figure 23鈥?/div>
On-board with pin fins 鈥?package G
Input reflected ripple
measurement point
F1
7A
Fuse
0.30
鈩?/div>
R1
+In
Enable/Disable Switch
0.47
碌F
ceramic
+Out
R3
0.1
鈩?/div>
+
C2
C1
8
碌F
ceramic
2K
鈩?/div>
SW1
R2
PC
SG
TM
鈥揑n
鈥揙ut
BCM
C3
1
碌F
ceramic
Load
D1
鈥?/div>
+
Temperature Monitor
鈥?/div>
Notes:
Source inductance should be no more than 200 nH. If source inductance is
greater than 200 nH, additional bypass capacitance is required.
C3 should be placed close to the load.
D1 power good indicator will dim when a module fault is detected.
TM should always be referenced to SG.
Figure 24鈥擝CM
test circuit
Application Note
Parallel Operation
The BCM will inherently current share when properly
configured in an array of BCMs. Arrays may be used for
higher power or redundancy in an application.
Current sharing accuracy is maximized when the source and
load impedance presented to each BCM within an array are equal.
The recommended method to achieve matched impedances is to
dedicate common copper planes within the PCB to deliver and
return the current to the array, rather than rely upon traces of
varying lengths. In typical applications the current being
delivered to the load is larger than that sourced from the input,
allowing traces to be utilized on the input side if necessary. The
use of dedicated power planes is, however, preferable.
The BCM power train and control architecture allow
bi-directional power transfer, including reverse power
processing from the BCM output to its input. Reverse power
transfer is enabled if the BCM input is within its operating
range and the BCM is otherwise enabled. The BCM鈥檚 ability to
process power in reverse improves the BCM transient response
to an output load dump.
45
Vicor Corporation
Tel: 800-735-6200
vicorpower.com
V鈥 Chip Bus Converter
B048K120T15
Rev. 1.2
Page 11 of 16

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