BCM ? Bus Converter
BCM352 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.
? Provides enable/disable control, internal temperature
monitoring
? ZVS/ZCS Resonant Sine Amplitude Converter topology
? Can be paralleled to create multi-kW arrays
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.
TYPICAL APPLICATIONS
? High End Computing Systems
? Automated Test Equipment
? High Density Power Supplies
V IN = 330 – 365 V
V OUT = 11.79 – 13.04 V ( NO LOAD )
PART NUMBERING
P OUT = 300 W( NOM )
K = 1/28
PART NUMBER
BCM 352 x 125 T 300A00
PACKAGE STYLE
F = J-Lead
T = Through hole
PRODUCT GRADE
T = -40° to 125 °C
For Storage and Operating Temperatures see Section 6.0 General Characteristics
TYPICAL APPLICATION
enable / disable
switch
SW1
PC
TM
BCM ?
POL
POL
F1
+In
+Out
POL
V IN
C1
1 μF
V OUT
POL
(8)
-In
-Out
BCM ? Bus Converter
Page 1 of 18
Rev 1.7
1/2013
vicorpower.com
800 735.6200
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