BCM
®
Bus Converter
BCM384x120y300Azz
®
S
C
US
C
NRTL
US
Isolated Fixed Ratio DC-DC Converter
Features & Benefits
•
384V
DC
– 12.0V
DC
300W Bus Converter
•
High efficiency (>94%) reduces system
power consumption
•
High power density (>1022W/in
3
)
reduces power system footprint by >40%
•
Contains built-in protection features:
n
Undervoltage
n
Overvoltage Lockout
n
Overcurrent Protection
n
Short circuit Protection
n
Overtemperature Protection
•
Provides enable/disable control,
internal temperature monitoring
•
Can be paralleled to create multi-kW arrays
Product Ratings
V
IN
= 384V (360 – 400V)
V
OUT
= 12.0V (11.3 – 12.5V)
(
no load
)
P
OUT
= up to 300W
K = 1/32
Description
The VI Chip
®
bus converter is a high efficiency (>94%) Sine
Amplitude Converter™ (SAC™) operating from a 360 to 400V
DC
primary bus to deliver an isolated, ratiometric output voltage from
11.3 to 12.5V
DC
. The Sine Amplitude Converter offers a low AC
impedance beyond the bandwidth of most downstream regulators;
therefore capacitance normally at the load can be located at the
input to the Sine Amplitude Converter. Since the transformation
ratio of the BCM384x120y300Azz is 1/32, the capacitance value
can be reduced by a factor of 1024x, resulting in savings of board
area, materials and total system cost.
The BCM384F120y300Azz is provided in a VI Chip package
compatible with standard pick-and-place and surface mount
assembly processes. The co-molded VI Chip package provides
enhanced thermal management due to a large thermal interface
area and superior thermal conductivity. The high conversion
efficiency of the BCM384x120y300Azz increases overall
system efficiency and lowers operating costs compared to
conventional approaches.
Typical Applications
•
High End Computing Systems
•
Automated Test Equipment
•
High Density Power Supplies
•
Communications Systems
Typical Application
enable / disable
switch
SW1
F1
V
IN
C1
1µF
PC
TM
BCM
+IN
®
+OUT
V
OUT
L
O
A
D
-IN
-OUT
BCM
®
Bus Converter
Page 1 of 21
Rev 1.5
08/2016
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800 927.9474
BCM384x120y300Azz
Pin Configuration
4
A
3
2
1
A
B
C
D
E
+OUT
B
C
D
E
+IN
-OUT
F
G
H
J
H
J
K
L
M
N
P
R
T
TM
RSV
PC
+OUT
K
L
M
N
-OUT
P
R
T
-IN
Bottom View
Pin Descriptions
Pin Number
A1-E1, A2-E2
L1-T1, L2-T2
H1, H2
J1, J2
K1, K2
A3-D3, A4-D4,
J3-M3, J4-M4
E3-H3, E4-H4,
N3-T3, N4-T4
Signal Name
+IN
–IN
TM
RSV
PC
+OUT
–OUT
Type
INPUT POWER
INPUT POWER
RETURN
OUTPUT
NC
OUTPUT/INPUT
OUTPUT POWER
OUTPUT POWER
RETURN
Positive input power terminal
Negative input power terminal
Temperature monitor, input side referenced signal
No connect
Enable and disable control, input side referenced signal
Positive output power terminal
Negative output power terminal
Function
BCM
®
Bus Converter
Page 2 of 21
Rev 1.5
08/2016
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800 927.9474
BCM384x120y300Azz
Part Ordering Information
Device
BCM
Input Voltage Range
384
Package Type
x
F = Full VIC SMD
BCM = BCM
384 = 360 – 400V
T = Full VIC TH
120 = 12.0V
M = -55 – 125ºC
Output Voltage x 10
120
Temperature Grade
y
T = -40 – 125ºC
300 = 300W
A
Output Power Revision
300
A
Version
zz
00 = standard
>00 = Customer
specific version
Standard Models
Part Number
BCM384F120T300A00
BCM384F120M300A00
BCM384T120T300A00
BCM384T120M300A00
V
IN
360 – 400V
Package Type
Full VIC SMD
V
OUT
12.0V
(11.3 – 12.5V)
12.0V
(11.3 – 12.5V)
Temperature
-40 – 125ºC
-55 – 125ºC
-40 – 125ºC
-55 – 125ºC
Power
300W
Version
00 = standard
360 – 400V
Full VIC TH
300W
00 = standard
Absolute Maximum Ratings
The absolute maximum ratings below are stress ratings only. Operation at or beyond these maximum ratings can cause permanent damage to the device.
Parameter
+IN to –IN
V
IN
slew rate
Isolation voltage, input to ouput
+OUT to –OUT
Output current transient
Output current average
PC to –IN
TM to –IN
Operating IC junction temperature
Storage temperature
≤
10ms,
≤
10% DC
-1
-3
-2
-0.3
-0.3
-40
-40
Operational
Comments
Min
-1
-1
Max
440
1
4242
16
39
28
20
7
125
125
Unit
V
V/µs
V
V
A
A
V
V
ºC
ºC
BCM
®
Bus Converter
Page 3 of 21
Rev 1.5
08/2016
vicorpower.com
800 927.9474
BCM384x120y300Azz
Electrical Specifications
Specifications apply over all line and load conditions, unless otherwise noted;
boldface
specifications apply over the temperature range of
-40°C
≤
T
CASE
≤
100°C (T-Grade); all other specifications are at T
CASE
= 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
Powertrain
Input voltage range, continuous
Input voltage range, transient
Quiescent power
V
IN
to V
OUT
time
V
IN_DC
V
IN_TRANS
P
Q
T
ON1
Full current or power supported, 50ms max,
10% duty cycle max
Disabled, PC Low
V
IN
= 384V, PC floating
V
IN
= 384V, T
CASE
= 25ºC
No load power dissipation
P
NL
V
IN
= 384V
V
IN
= 360V to 400V, T
CASE
= 25ºC
V
IN
= 360V to 400V
Inrush current peak
DC input current
Transformation ratio
Output power (average)
Output power (peak)
Output current (average)
Output current (peak)
I
INR_P
I
IN_DC
K
P
OUT_AVG
P
OUT_PK
I
OUT_AVG
I
OUT_PK
Worse case of: V
IN
= 400V, C
OUT
= 1000µF,
R
LOAD
= 1.7Ω
At P
OUT
= 300W
K = V
OUT
/ V
IN
, at no load
I
OUT_AVG
≤
27.7A
10ms max, P
OUT_AVG
≤
300W
P
OUT_AVG
≤
300W
10ms max, I
OUT_AVG
≤
27.3A
V
IN
= 384V, I
OUT
= 27.3A; T
CASE
= 25°C
Efficiency (ambient)
h
AMB
V
IN
= 360V to 400V, I
OUT
= 27.3A; T
CASE
= 25°C
V
IN
= 384V, I
OUT
= 14A; T
CASE
= 25°C
Efficiency (hot)
Efficiency (over load range)
h
HOT
h
20%
R
OUT_COLD
Output resistance
R
OUT_AMB
R
OUT_HOT
Switching frequency
Output voltage ripple
Output inductance (parasitic)
Output capacitance (internal)
Output capacitance (external)
F
SW
V
OUT_PP
L
OUT_PAR
C
OUT_INT
C
OUT_EXT
C
OUT
= 0F, I
OUT
= 27.3A, V
IN
= 384V,
20MHz BW
Frequency up to 30MHz, Simulated J-lead model
Effective value at 12.0V
OUT
See chart for output capacitance vs. startup load limits
0
V
IN
= 384V, I
OUT
= 27.3A; T
CASE
= 100°C
5A < I
OUT
< 27.3A
I
OUT
= 27.3A, T
CASE
= -40°C
I
OUT
= 27.3A, T
CASE
= 25°C
I
OUT
= 27.3A, T
CASE
= 100°C
94.2
94.0
92.5
94.0
90.0
0.5
2.6
6.0
1.85
1.9
6.0
8.6
1.95
200
500
31
1000
4.0
9.4
12.0
2.05
400
MHz
mV
pH
µF
µF
mΩ
94.3
95.2
%
%
95.5
%
1/32
300
450
27.3
39
1.5
5.0
380
360
360
395
440
7.0
400
420
450.0
500
10.0
15.0
12
17
3
0.9
A
A
V/V
W
W
A
A
W
V
V
mW
ms
BCM
®
Bus Converter
Page 4 of 21
Rev 1.5
08/2016
vicorpower.com
800 927.9474
BCM384x120y300Azz
Electrical Specifications (Cont.)
Specifications apply over all line and load conditions, unless otherwise noted;
boldface
specifications apply over the temperature range of
-40°C
≤
T
CASE
≤
100°C (T-Grade); all other specifications are at T
CASE
= 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
Protection
Input overvoltage lockout threshold
Input overvoltage recovery threshold
Input overvoltage lockout hysteresis
Overvoltage lockout response time
Fault recovery time
Input undervoltage lockout
threshold
Input undervoltage recovery
threshold
Input undervoltage lockout
hysteresis
Undervoltage lockout response time
Output overcurrent trip threshold
Output overcurrent response time
constant
Short circuit protection trip threshold
Short circuit protection response time
Thermal shutdown threshold
V
IN_OVLO+
V
IN_OVLO-
V
IN_OVLO_HYST
T
OVLO
T
AUTO_RESTART
V
IN_UVLO-
V
IN_UVLO+
V
IN_UVLO_HYST
T
UVLO
I
OCP
T
OCP
I
SCP
T
SCP
T
J_OTP
125
Effective internal RC filter
45
1
28.2
380
220.0
230.0
400.0
9
47
440
240.0
255.0
15
47
36
5.2
50
500
259.0
290.0
430.0
V
V
V
µs
ms
V
V
V
µs
A
ms
A
µs
°C
BCM
®
Bus Converter
Page 5 of 21
Rev 1.5
08/2016
vicorpower.com
800 927.9474
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