VI BRICK BCM modules use advanced Sine Amplitude Converter
TM
(SAC
TM
) technology,
thermally enhanced packaging technologies, and advanced CIM processes to provide high
power density and efficiency, superior transient response, and improved thermal
management. These modules can be used to provide an isolated intermediate bus to power
non-isolated POL converters and due to the fast response time and low noise of the BCM,
capacitance can be reduced or eliminated near the load.
Part Numbering
BC
Bus
Converter
Module
048
Input
Voltage
Designator
A
Package
Size
040
Output
Voltage
Designator
(=V
OUT
x10)
T
020
Output
Power
Designator
(=P
OUT
/10)
F
P
Product Grade Temperatures (°C)
Grade
T
=
M
=
Operating
Storage
Baseplate
F
= Slotted flange
T
= Transverse heat sink
[a]
[a]
contact
Pin Style
P
= Through hole
–40 to +100 –40 to +125
–55 to +100 –65 to +125
factory
Bus Converter Module
BC048A040T020FP
vicorpower.com
Rev. 1.0
Page 1 of 11
SPECIFICATIONS
Electrical characteristics apply over the full operating range of input voltage, output load (resistive) and baseplate temperature,
unless otherwise specified. All temperatures refer to the operating temperature at the center of the baseplate.
Absolute Maximum Ratings
Parameter
+In to -In
+In to -In
PC to -In
+Out to -Out
Isolation voltage
Output current
Peak output current
Output power
Peak output power
Operating temperature
Storage temperature
Values
-1.0 to 60
100
-0.3 to 7.0
-0.5 to 12
2,250
58
75
200
300
-40 to +100
-55 to +100
-40 to +125
-65 to +125
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
A
A
W
W
°C
°C
°C
°C
Input to output
Continuous
For 1 ms
Continuous
For 1 ms
T-Grade; baseplate
M-Grade; baseplate
T-Grade
M-Grade
For 100 ms
Notes
Note:
Stresses in excess of the maximum ratings can cause permanent damage to the device. Operation of the device is not implied at these or any other conditions
in excess of those given in the specification. Exposure to absolute maximum ratings can adversely affect device reliability.
Input Specifications
Parameter
Input voltage range
Input dV/dt
Input undervoltage turn-on
Input undervoltage turn-off
Input overvoltage turn-on
Input overvoltage turn-off
Input quiescent current
Inrush current overshoot
Input current
Input reflected ripple current
No load power dissipation
Internal input capacitance
Internal input inductance
(Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Min
38
Typ
48
Max
55
1
37.4
32.6
55.0
59.0
2.9
3.7
4.6
114
3.9
1.9
5
47
4.8
Unit
Vdc
V/µs
Vdc
Vdc
Vdc
Vdc
mA
A
Adc
mA p-p
W
µF
nH
µF
200 nH maximum source inductance; See Figure 15
Using test circuit in Figure 15; See Figure 4
PC low
Using test circuit in Figure 15; See Figure 1
Notes
Recommended external input capacitance
Bus Converter Module
BC048A040T020FP
vicorpower.com
Rev. 1.0
Page 2 of 11
SPECIFICATIONS (CONT.)
INPUT WAVEFORMS
Figure 1
— Inrush transient current at full load and 48 Vin with PC
enabled
Figure 2
— Output voltage turn-on waveform with PC enabled at full
load and 48 Vin
Figure 3
— Output voltage turn-on waveform with input turn-on at
full load and 48 Vin
Figure 4
— Input reflected ripple current at full load and 48 Vin
Bus Converter Module
BC048A040T020FP
vicorpower.com
Rev. 1.0
Page 3 of 11
SPECIFICATIONS (CONT.)
Output Specifications
Parameter
Output voltage
Output power
Rated DC current
Peak repetitive power
Current share accuracy
Efficiency
Half load
Full load
Internal output inductance
Internal output capacitance
Load capacitance
Output overvoltage setpoint
Output ripple voltage
No external bypass
47 µF bypass capacitor
Short circuit protection set point
Average short circuit current
Effective switching frequency
Line regulation
K
Load regulation
R
OUT
Transient response
Voltage overshoot
Response time
Recovery time
Output overshoot
Input turn-on
PC enable
Output turn-on delay
From application of power
From release of PC pin
5
93.8
93.5
94.8
94.5
1.1
255
9,100
4.6
216
8
59.8
2.40
0.0825
0.77
2.55
1/12
2.8
110
200
1
0
0
215
75
2.70
0.0842
3.6
mΩ
mV
ns
µs
mV
mV
ms
ms
100% load step; See Figures 10 and 11
See Figures 10 and 11
See Figures 10 and 11
No output filter; See Figure 3
No output filter; See Figure 2
No output filter; See Figure 3
No output filter
305
(Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Min
3.17
2.99
0
0
0
Typ
Max
4.58
4.42
200
172
58
300
10
Unit
Vdc
Vdc
W
W
Adc
W
%
%
%
nH
µF
µF
Vdc
mVp-p
mVp-p
Adc
A
MHz
Note
No load
Full load
44 - 55 V
IN
38 - 55 V
IN
P
OUT
≤
200 W
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
See Parallel Operation on Page 8
See Figure 5
See Figure 5
Effective value
See Figures 7 and 9
See Figure 8
Module will shut down
Fixed, 1.3 MHz per phase
V
OUT
= K•V
IN
at no load
OUTPUT WAVEFORMS
Efficiency vs. Output Power
96
14
12
10
8
6
4
2
Power Dissipation
Power Dissipation (W)
94
Efficiency (%)
92
90
88
86
84
82
0
20
40
60
80
100
120
140
160
180
200
0
20
40
60
80
100
120
140
160
180
200
Output Power (W)
Output Power (W)
Figure 5
— Efficiency vs. output power
Bus Converter Module
BC048A040T020FP
Figure 6
— Power dissipation as a function of output power
vicorpower.com
Rev. 1.0
Page 4 of 11
SPECIFICATIONS (CONT.)
OUTPUT WAVEFORMS
Figure 7
— Output voltage ripple at full load and 48 Vin without any
external bypass capacitor.
Figure 8
— Output voltage ripple at full load and 48 Vin with 47 µF
ceramic external bypass capacitor and 20 nH of distribution inductance.
Ripple vs. Output Power
220
Output Ripple (mVpk-pk)
200
180
160
140
120
100
80
0
20
40
60
80
100
120
140
160
180
200
Output Power (W)
Figure 9
— Output voltage ripple vs. output power at 48 Vin without any
external bypass capacitor.
Figure 10
— 0 -50 A load step with 100 µF input capacitor and no
output capacitor.
Figure 11
— 50- 0 A load step with 100 µF input capacitor and no
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