BCM
®
Bus Converter
BCM 352
x
125
y
300A00
S
C
NRTL
US
Sine Amplitude Converter™ (SAC™)
FEATURES
•
352 Vdc – 12.5 Vdc 300 W Bus Converter
•
High efficiency (>95%) reduces system power
consumption
•
High power density (>1000 W/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: undervoltage,
overvoltage lockout, overcurrent protection, short
circuit protection, overtemperature protection.
DESCRIPTION
The VI Chip
®
bus converter is a high efficiency (>95%) Sine Am-
plitude Converter™ (SAC™) operating from a 330 to 365 Vdc
primary bus to deliver an isolated 11.79 – 13.04 V nominal,
unregulated secondary. 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 BCM352F125T300A00 is 1/28, that capacitance
value can be reduced by a factor of 784x, resulting in savings of
board area, materials and total system cost.
The BCM352F125T300A00 is provided in a VI Chip package
compatible with standard pick-and-place and surface mount
assembly processes. The VI Chip package provides flexible ther-
mal management through its low junction-to-case and junc-
tion-to-board thermal resistance. With high conversion
efficiency the BCM352F125T300A00 increases overall system
efficiency and lowers operating costs compared to
conventional approaches.
V
IN
= 330 – 365 V
V
OUT
= 11.79 – 13.04 V (
NO LOAD
)
P
OUT
= 300 W(
NOM
)
K = 1/28
•
Provides enable/disable control, internal temperature
monitoring
•
ZVS/ZCS Resonant Sine Amplitude Converter topology
•
Can be paralleled to create multi-kW arrays
TYPICAL APPLICATIONS
•
High End Computing Systems
•
Automated Test Equipment
•
High Density Power Supplies
PART NUMBERING
PART NUMBER
PACKAGE STYLE
PRODUCT GRADE
BCM352
x
125 T 300A00
F
= J-Lead
T
= Through hole
T
= -40° to 125 °C
For Storage and Operating Temperatures see Section 6.0 General Characteristics
TYPICAL APPLICATION
enable / disable
switch
SW1
F1
PC
TM
POL
BCM
®
+In
C1
1 µF
-In
-Out
+Out
V
OUT
POL
POL
POL
(8)
V
IN
BCM
®
Bus Converter
Page 1 of 18
Rev 1.7
1/2013
vicorpower.com
800 735.6200
VICOR [ VICOR CORPORATION ]
