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Datasheet: B048A120M20 (Vicor Corporation)

Vi Chip - Bcm Bus Converter Module

 

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Vicor Corporation
Vicor Corporation
Tel: 800-735-6200
VI Chip Bus Converter
B048K120T20
Rev. 2.2
Page 1 of 16
vicorpower.com
4
5
4
5
Product Description
The VI Chip Bus Converter Module
(BCM) is a high efficiency (>96%),
narrow input range Voltage
Transformation Module (VTM) operating
from a 48 Vdc bus to deliver an isolated
12 V secondary for Intermediate Bus
Architecture applications. The BCM may
be used to power non-isolated POL
converters or as an independent 12 V
source. Due to the fast response time and
low noise of the BCM, the need for
limited life aluminum electrolytic or
tantalum capacitors at the input of POL
converters is reduced--or eliminated--
resulting in savings of board area,
materials and total system cost.
The BCM achieves a power density of
800 W/in
3
and may be surface mounted
with a profile as low as 0.16" (4mm) over
the PCB. Its VI Chip power package is
compatible with on-board or in-board
surface mounting. The VI Chip package
provides flexible thermal management
through its low Junction-to-Case and
Junction-to-BGA thermal resistance.
Owing to its high conversion efficiency
and safe operating temperature range, the
BCM does not require a discrete heat sink
in typical applications. It is also
compatible with heat sink options,
assuring low junction temperatures and
long life in the harshest environments.
Absolute Maximum Ratings
Parameter
Values
Unit
Notes
+In to -In
-1.0 to 60.0
Vdc
+In to -In
100
Vdc
For 100 ms
PC to -In
-0.3 to 7.0
Vdc
TM to -In
-0.3 to 7.0
Vdc
+Out to -Out
-0.5 to 15.0
Vdc
Isolation voltage
2250
Vdc
Input to Output
Operating junction temperature
-40 to 125
C
T grade; See note 2
Output current
17.0
A
Continuous
Peak output current
25
A
For 1 ms
Case temperature during reflow
208
C
Storage temperature
-40 to 150
C
Output power
200
W
Continuous
Peak output power
300
W
For 1 ms
Thermal Resistance
Symbol
Parameter
Typ
Max
Units
R
JC
Junction-to-case
1.1
1.5
C/W
R
JB
Junction-to-BGA
2.1
2.5
C/W
R
JA
Junction-to-ambient
3
6.5
7.2
C/W
R
JA
Junction-to-ambient
4
5.0
5.5
C/W
48 V to 12 V VI Chip Converter
200 Watt (300 Watt for 1 ms)
High density up to 800 W/in
3
Small footprint 200 W/in
2
Low weight 0.5 oz (14 g)
ZVS/ZCS isolated sine
amplitude converter
>96% efficiency
125C operation
1 s transient response
>3.5 million hours MTBF
No output filtering required
BGA or J-Lead packages
B048K120T20
1
+
VI
K
+
Vin = 42 - 53 V
Vout = 10.5 - 13.25 V
Iout = 17.0 A
K =
1
/
4
Rout = 25 m
max
Notes
1. For complete product matrix see chart on page 10.
2. The referenced junction is defined as the semiconductor having the highest temperature. This
temperature is monitored by the temperature monitor (TM) signal and by a shutdown comparator.
3. B048K120T20 surface mounted in-board to a 2" x 2" FR4 board, 4 layers 2 oz Cu, 300 LFM.
4. B048L120T20 (0.25"H optional Pin Fins) surface mounted on FR4 board, 300 LFM.
Actual size
VI Chip
TM
BCM
Bus Converter Module
Vicor Corporation
Tel: 800-735-6200
VI Chip Bus Converter
B048K120T20
Rev. 2.2
Page 2 of 16
vicorpower.com
4
5
Specifications
Parameter
Min
Typ
Max
Unit
Note
Input voltage range
42
48
53
Vdc
Input dV/dt
1
V/s
Input undervoltage turn-on
42
Vdc
Input undervoltage turn-off
37
Vdc
Input overvoltage turn-on
53
Vdc
Input overvoltage turn-off
59
Vdc
Input quiescent current
1.5
1.8
mA
PC low
Inrush current overshoot
2.9
A
Using test circuit in Fig.22; See Fig.1
Input current
4.65
Adc
Input reflected ripple current
30
50
mA p-p
Using test circuit in Fig.22; See Fig.4
No load power dissipation
2.50
3.00
W
Internal input capacitance
2
F
Internal input inductance
20
nH
Recommended external input capacitance
10
F
200 nH maximum source inductance; See Fig.22
INPUT (Conditions are at 48 Vin, full load, and 25C ambient unless otherwise specified)
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
INPUT WAVEFORMS
Vicor Corporation
Tel: 800-735-6200
VI Chip Bus Converter
B048K120T20
Rev. 2.2
Page 3 of 16
vicorpower.com
4
5
4
5
Specifications, continued
Parameter
Min
Typ
Max
Unit
Note
Rated DC current
0
17.0
Adc
Peak repetitive current
25.0
A
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
DC current limit
17.0
21.0
26.0
Adc
Current share accuracy
5
10
%
See Parallel Operation on page 12
Efficiency
10A load
95.5
96.2
%
See Fig.5
Full load
95.0
95.7
%
See Fig.5
Internal output inductance
1.6
nH
Internal output capacitance
12
F
Effective value
Load capacitance
1000
F
Output overvoltage setpoint
14.75
Vdc
Output ripple voltage
No external bypass
95
150
mV
See Figs.7 and 9
1F bypass capacitor
12
mV
See Fig.8
Average short circuit current
200
mA
Effective switching frequency
2.8
3.5
4.2
MHz
Fixed, 1.75 MHz per phase
Line regulation
K
0.245
0.250
0.255
V
OUT
=KV
IN
at no load
Load regulation
R
OUT
25
m
See Fig. 26
Transient response
Voltage overshoot
230
mV
0-17.0A load step, see Fig.10
40
mV
1.2-15A load step with 1F bypass, see Fig. 11
Response time
200
ns
See Figs.10 and 11
Recovery time
1
s
See Figs.10 and 11
Output overshoot
Input turn-on
0
mV
No output filter; See Fig.3
PC enable
0
mV
No output filter; See Fig.2
Output turn-on delay
From application of power
250
ms
No output filter; See Fig.3
From release of PC pin
50
ms
No output filter; See Fig.2
OUTPUT (Conditions are at 48 Vin, full load, and 25C ambient unless otherwise specified)
Efficiency vs. Output Power
89
90
91
92
93
94
95
96
97
0
50
100
150
200
Output Power (W)
Efficiency (%)
25
75
125
175
Figure 5-- Efficiency vs. output power at 12 Vout
Power Dissipation
0
1
2
3
4
5
6
7
8
9
10
Output Power (W)
Power Dissipation (W)
0
50
100
150
200
25
75
125
175
Figure 6--Power dissipation as a function of output power
OUTPUT WAVEFORMS
Vicor Corporation
Tel: 800-735-6200
VI Chip Bus Converter
B048K120T20
Rev. 2.2
Page 4 of 16
vicorpower.com
4
5
Specifications, continued
Figure 8--Output voltage ripple at full load and nominal Vin
with 1 F ceramic external bypass capacitor.
Figure 7-- Output voltage ripple at full load and 48 Vin;
without any external bypass capacitor.
Figure 9-- Output voltage ripple vs. output power at 48 Vin
without any external bypass capacitor.
Figure 10-- 0-17 A load step with 100 F input capacitance and
no output capacitance.
Figure 11-- 17-0A load step with 100 F input capacitance and
no output capacitance.
V
OUT
I
OUT
7 A/div
V
OUT
I
OUT
7 A/div
Vicor Corporation
Tel: 800-735-6200
VI Chip Bus Converter
B048K120T20
Rev. 2.2
Page 5 of 16
vicorpower.com
4
5
4
5
Parameter
Min
Typ
Max
Unit
Note
Primary control (PC)
DC voltage
4.8
5.0
5.2
V
Module disable voltage
2.4
2.5
V
Module enable voltage
2.5
2.6
V
Current limit
2.4
2.5
2.9
mA
Source only
Enable delay time
50
ms
See Fig.2
Disable delay time
4
10
s
See Fig.12
Temperature Monitor (TM)
27C setting
2.95
3.00
3.05
V
Operating junction temperature
Temperature coefficient
10
mV/C
Full range accuracy
5
C
Operating junction temperature
Current limit
100
A
Source only
Auxiliary Pins (Conditions are at nominal line, full load, and 25C ambient unless otherwise specified)
Figure 12-- V
OUT
at full load vs. PC disable
Figure 13-- PC signal during fault
Specifications, continued
Parameter
Min
Typ
Max
Unit
Note
MTBF
MIL-HDBK-217F
3.6
Mhrs
25C, GB
Telcordia TR-NT-000332
4.2
Mhrs
Telcordia SR-332
TBD
hrs
Demonstrated
TBD
hrs
Isolation specifications
Voltage
2,250
Vdc
Input to Output
Capacitance
5,000
6,500
pF
Input to Output
Resistance
10
M
Input to Output
Agency approvals (pending)
cTVus
UL/CSA 60950, EN 60950
CE Mark
Low Voltage Directive
Mechanical parameters
See mechanical drawing, Figs.15 and 17
Weight
0.5 / 14
oz / g
Dimensions
Length
1.26 / 32
in / mm
Width
0.85 / 21.5
in / mm
Height
0.24 / 6
in / mm
GENERAL
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