BCM
®
Bus Converter
BCM352x440y330A00
®
S
C
US
C
NRTL
US
Isolated Fixed Ratio DC-DC Converter
Features & Benefits
•
352V
DC
– 44V
DC
325W Bus Converter
•
High efficiency (>95%) reduces
system power consumption
•
High power density (1000W/in
3
) reduces
power system footprint by >40%
•
“Full Chip” VI Chip
®
package enables surface mount,
low impedance interconnect to system board
•
Contains built-in protection features against:
n
Undervoltage
n
Overvoltage
n
Overcurrent
n
Short Circuit
n
Overtemperature
•
Provides enable/disable control,
internal temperature monitoring
•
ZVS/ZCS Resonant Sine Amplitude Converter topology
•
Can be paralleled to create multi-kW arrays
Product Ratings
V
IN
= 352V (330 – 365V)
V
OUT
= 44V (41.25 – 45.63V)
(
no load
)
P
OUT
= up to 325W
K = 1/8
Description
The VI Chip
®
Bus Converter is a high efficiency (>95%) Sine
Amplitude ConverterTM (SAC
TM
) operating from a 330 to 365V
DC
primary bus to deliver an isolated ratiometric output voltage from
41.25 to 45.63V
DC
. The SAC offers a low AC impedance beyond
the bandwidth of most downstream regulators, meaning that
input capacitance normally located at the input of a regulator
can be located at the input to the SAC. Since the K factor of
the BCM352x440y330A00 is 1/8, that capacitance value can be
reduced by a factor of 64x, resulting in savings of board area,
materials and total system cost.
The BCM352F440y330A00 is provided in a VI Chip package
compatible with standard pick-and-place and surface mount
assembly processes. The VI Chip package provides flexible thermal
management through its low junction-to-case and junction-to-
board thermal resistance. With high conversion efficiency the
BCM352x440y330A00 increases overall system efficiency and
lowers operating costs compared to conventional approaches.
Typical Application
•
High End Computing Systems
•
Automated Test Equipment
•
Telecom Base Stations
Part Numbering
Product Number
BCM352x440y330A00
Package Style (x)
F
= J-Lead
Product Grade (y)
T
= -40° to 125°C
For Storage and Operating Temperatures see Section 6.0 General Characteristics
Typical Application
Bus Converter
PR
enable / disable
switch
SW1
F1
V
IN
-IN
-OUT
-IN
-OUT
-IN
-OUT
+IN
PC
TM
PC
TM
IL
Regulator
VC
SG
OS
CD
Current Multiplier
VC
PC
TM
BCM
®
+OUT
F2
PRM™
+IN
+OUT
+IN
VTM™
+OUT
L
O
A
D
BCM
®
Bus Converter
Page 1 of 20
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08/2016
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BCM352x440y330A00
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
Control Pin Specifications
See Using the Control Signals PC, TM for more information.
PC (BCM Primary Control)
The PC pin can enable and disable the BCM module. When held
below V
PC_DIS
the BCM shall be disabled. When allowed to
float with an impedance to –IN of greater than 50kΩ the
module will start. When connected to another BCM PC pin
(either directly, or isolated through a diode), the BCM modules
will start simultaneously when enabled. The PC pin is capable of
being either driven high by an external logic signal or internal
pull up to 5V (operating).
TM (BCM Temperature Monitor)
The TM pin monitors the internal temperature of the BCM module
within an accuracy of ±5°C. It has a room temperature setpoint of
~3.0V and an approximate gain of 10mV/°C. It can source up to
100µA and may also be used as a “Power Good” flag to verify that
the BCM module is operating.
BCM
®
Bus Converter
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08/2016
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BCM352x440y330A00
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
+IN/-IN TO +OUT/-OUT (hipot)
+IN/-IN TO +OUT/-OUT (working)
+OUT to –OUT
PC to –IN
TM to –IN
Temperature during reflow
MSL 4 (Datecode 1528 and later)
-1
-0.3
-0.3
Comments
Min
-1.0
Max
400
4242
500
60
20
7
245
Unit
V
V
V
V
V
V
ºC
BCM
®
Bus Converter
Page 3 of 20
Rev 1.8
08/2016
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800 927.9474
BCM352x440y330A00
Electrical Specifications
Specifications apply over all line and load conditions, unless otherwise noted;
boldface
specifications apply over the temperature range of
-40°C
≤
T
J
≤
125°C (T-Grade); all other specifications are at T
J
= 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
Powertrain
Voltage range
dV / dt
Quiescent power
No load power dissipation
Inrush current peak
DC input current
Transformation ratio
Output power (average)
Output power (peak)
Output voltage
Output current (average)
Efficiency (ambient)
Efficiency (hot)
Efficiency (over load range)
V
IN_DC
dV
IN
/ dt
P
Q
P
NL
I
INR_P
I
IN_DC
K
P
OUT_AVG
P
OUT_PK
V
OUT
I
OUT_AVG
h
AMB
h
HOT
h
20%
R
OUT_COLD
Output resistance
R
OUT_AMB
R
OUT_HOT
Load capacitance
Switching frequency
Ripple frequency
Output voltage ripple
V
IN
to V
OUT
(application of V
IN
)
C
OUT
F
SW
F
SW_RP
V
OUT_PP
T
ON1
C
OUT
= 0µF, P
OUT
= 325W, V
IN
= 352V,
V
IN
= 352V, C
PC
= 0
460
1.56
3.12
1.65
3.3
192
540
PC connected to –IN
V
IN
= 352V
V
IN
= 330V to 365V
V
IN
= 365V, C
OUT
= 100µF,
P
OUT
= 325W
At P
OUT
= 325W
K = V
OUT
/ V
IN
, at no load
V
IN
= 352V
DC
V
IN
= 330 - 365V
DC
V
IN
= 352V
DC ,
5ms max, P
OUT_AVG
≤
325W
No load
P
OUT_AVG
≤
325W
V
IN
= 352V, P
OUT
= 325W
V
IN
= 330V to 365V, P
OUT
= 325W
V
IN
= 352V, P
OUT
= 325W; T
J
= 100°C
60W < P
OUT
< 325W
T
J
= -40°C
T
J
= 25°C
T
J
= 125°C
94.4
94.4
94.3
90
60
100
150
115
140
190
180
180
230
100
1.73
3.46
400
620
µF
MHz
MHz
mV
ms
mΩ
95.3
95.7
41.25
1/8
325
305
495
45.63
7.7
2
395
6.5
330
352
365
1
410
9.5
12
4.5
1
V
V/µs
mW
W
A
A
V/V
W
W
V
A
%
%
%
BCM
®
Bus Converter
Page 4 of 20
Rev 1.8
08/2016
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800 927.9474
BCM352x440y330A00
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
J
≤
125°C (T-Grade); all other specifications are at T
J
= 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
Protection
Input overvoltage lockout threshold
Input overvoltage recovery threshold
Input undervoltage recovery
threshold
Input undervoltage lockout
threshold
Output overcurrent trip threshold
Short circuit protection trip threshold
Short circuit protection response
time
Thermal shutdown threshold
V
IN_OVLO+
V
IN_OVLO-
V
IN_UVLO+
V
IN_UVLO-
I
OCP
I
SCP
T
SCP
T
J_OTP
125
130
V
IN
= 352V, 25ºC
380
365
285
270
10
15
1.2
135
385
380
300
285
12
400
390
325
304
15
V
V
V
V
A
A
µs
°C
600
Output Power (W)
500
400
300
200
100
0
40.00
41.00
42.00
43.00
44.00
45.00
46.00
Output Voltage (V)
P (ave)
P (pk) < 5ms
Figure 1
— Safe operating area
BCM
®
Bus Converter
Page 5 of 20
Rev 1.8
08/2016
vicorpower.com
800 927.9474
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