BCM® Bus Converter
BCM384x480y325Bzz
S
®
C
NRTL US
C
US
Isolated Fixed Ratio DC-DC Converter
Features & Benefits
Product Ratings
• 384VDC – 48VDC 325W Bus Converter
VIN = 384V (360 – 400V)
POUT = up to 325W
K = 1/8
• High efficiency (95%) reduces system
power consumption
V
OUT = 48V (45 – 50V)
(no load)
• High power density (1106W/in3)
reduces power system footprint by >40%
Description
• Contains built-in protection features:
n Undervoltage
The VI Chip® bus converter is a high efficiency (95%) Sine
Amplitude Converter™ (SAC™) operating from a 360 to 400VDC
primary bus to deliver an isolated, ratiometric output voltage from
45 to 50VDC. 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 BCM384x480y325Bzz is 1/8, the capacitance value can
be reduced by a factor of 64x, resulting in savings of board area,
materials and total system cost.
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
The BCM384F480y325Bzz 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 BCM384x480y325Bzz 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
BCM
TM
PC
enable/disable
switch
F1
+IN
+OUT
COUT
POL
VIN
CIN
–OUT
–IN
GND
PRIMARY
SECONDARY
ISOLATION BOUNDRY
BCM® Bus Converter
Page 1 of 22
Rev 1.1
10/2016
vicorpower.com
800 927.9474
VICOR [ VICOR CORPORATION ]
