BCM Bus Converter
BCM384 x480 y325 A00
SS
CUCUNRNRTLTLSS
Fixed Ratio DC-DC Converter
FEATURES DESCRIPTION
The VI Chip bus converter is a high efficiency (> 95 %) Sine Am-
384 Vdc 48 Vdc 325 W Bus Converter
plitude Converter (SAC) operating from a 360 to 400 Vdc
High efficiency (> 95 %) reduces system power
primary bus to deliver an isolated, ratiometric output from
consumption
45 to 50 V. The SAC offers a low AC impedance beyond the
bandwidth of most downstream regulators, meaning that input
3
High power density (> 1000 W/in )
capacitance normally located at the input of a regulator can be
reduces power system footprint by >40%
located at the input to the SAC. Since the K factor of the
BCM384F480T325A00 is 1/ 8 , that capacitance value can be re-
Full Chip VI Chip package enables surface mount,
duced by a factor of 64 x, resulting in savings of board area, ma-
low impedance interconnect to system board
terials and total system cost.
Contains built-in protection features: undervoltage,
The BCM384F480T325A00 is provided in a VI Chip package
overvoltage lockout, overcurrent protection, short
compatible with standard pick-and-place and surface mount
circuit protection, overtemperature protection.
assembly processes. The VI Chip package provides flexible ther-
Provides enable/disable control, internal temperature
mal management through its low junction-to-case and junc-
monitoring
tion-to-board thermal resistance. With high conversion
efficiency the BCM384F480T325A00 increases overall system
ZVS/ZCS Resonant Sine Amplitude Converter topology
efficiency and lowers operating costs compared to
Can be paralleled to create multi-kW arrays
conventional approaches.
TYPICAL APPLICATIONS
V = 360 400 V P = 325 W(NOM)
IN OUT
High End Computing Systems
V = 45 50 V (NO LOAD) K = 1/ 8
OUT
Automated T est Equipment
Telecom Base Stations
PART NUMBERING
PART NUMBER PACKAGE STYLE PRODUCT GRADE
F = J-Lead
BCM 384 x 480 T 325 A00 T = -40 to 125 C
T = Through hole
For Storage and Operating Temperatures see Section 6.0 General Characteristics
TYPICAL APPLICATION
VC VC
PR SG
OS PC
PC
enable / disable PC TM
CD
TM
L
switch
TM
IL
SW1 O
PRM
BCM VTM
F1
A
+In +Out +In +Out +In +Out
V C1 1 F D
IN
-In -Out -In -Out -In -Out
BCM Bus Converter Rev 2.0 vicorpower.com
800 927.9474
Page 1 of 18 07/2015 BCM384 x480 y325 A00
CONTROL PIN SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
See section 5.0 for further application details and guidelines.
+IN to IN . . . . . . . . . . . . . . . . . . . . . . . . -1.0 Vdc + 440 Vdc
PC to IN . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 Vdc + 20 Vdc
PC (BCM Primary Control)
TM to IN . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 Vdc + 7 Vdc
The PC pin can enable and disable the BCM bus converter.
+IN/-IN to +OUT/-OUT . . . . . . . . . . . . . . . . . . . 4242 V (Hi Pot)
When held below V the BCM module shall be disabled.
PC_DIS
+IN/-IN to +OUT/-OUT. . . . . . . . . . . . . . . . . . . 500 V (working)
When allowed to float with an impedance to IN of greater
than 50 k the module will start. When connected to another
+OUT to OUT . . . . . . . . . . . . . . . . . . . . . . -1.0 Vdc - + 60 Vdc
bus converter PC pin, the modules will start simultaneously
Temperature during reflow . . . . . . . . . . . . . . . . . . . . . . . 245 C
when enabled. The PC pin is capable of being driven high by
an either external logic signal or internal pull up to 5 V (operat-
PACKAGE ORDERING INFORMATION
ing).
TM (BCM Temperature Monitor)
4 3 2 1
A A
The TM pin monitors the internal temperature of the module
B B
+Out
within an accuracy of +5/-5 C. It has a room temperature
+In
C
C
D
D
setpoint of ~3.0 V and an approximate gain of 10 mV/C. It
E
E
can source up to 100 A and may also be used as a Power
F
-Out
G TM Good flag to verify that the bus converter is operating.
H
H
J
RSV
J
K
K
PC
+Out
L
L
M
M
N
N
-In
P
P
R
-Out R
T
T
Bottom View
Signal
Name Designation
+In A1-E1, A2-E2
In L1-T1, L2-T2
TM H1, H2
RSV J1, J2
PC K1, K2
A3-D3, A4-D4,
+Out
J3-M3, J4-M4
E3-H3, E4-H4,
Out
N3-T3, N4-T4
BCM Bus Converter Rev 2.0 vicorpower.com
800 927.9474
Page 2 of 18 07/2015