ISOLATED DC/DC CONVERTERS
48 VDC Input 12 VDC/55A Output, 1/4 Brick
0RCM-55S12x RoHS Compliant PRELIMINARY Rev.D
•
•
•
•
•
Isolated
•
•
•
•
Input Under-Voltage Lockout
Input Over-Voltage Shutdown
OCP/SCP
High Efficiency
High Power Density
Low Cost
Remote On/Off
Over Temperature Protection
Description
The 0RCM-55S12x is isolated DC/DC onverter that operates from a nominal 48 VDC source. These converters
use a full bridge power train to provide isolation and step down. These units will provide up to 600 W of output
power from a nominal 55 VDC input. These units are designed to be highly efficient and low cost. Features
include remote on/off, over current protection and under voltage lockout. These converters are provided in an
industry standard quarter -brick package.
Part Selection
Output
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number Model Number
Voltage
Active Low
Active High
12 Vdc
48 Vdc
55 A
600 W
97%
0RCM-55S12L
0RCM-55S120
Notes: 1. Add “G” suffix at the end of the model number to indicate Tray Packaging.
2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Parameter
Min
Typ
Max
Notes
-0.3 V
-
80 V
Non-operating
Operating
Input Voltage (continuous)
-0.3 V
1 V
-
-
-
-
-
-
-
57 V
18 V
Module Off
Module On
Module On
Module Off
Remote On/Off (Active Low)
Remote On/Off (Active High)
-0.3 V
1 V
0.6 V
18 V
-0.3 V
-40 °C
-55 °C
0.6 V
85 °C
125 °C
Ambient Temperature
Storage Temperature
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
38 V
-
55 V
Input Current (full load)
Input Current (no load)
Remote Off Input Current
-
-
-
-
14.5 A
150 mA
10 mA
Vin=38 V
80 mA
5 mA
Active High
Tested with simulated source
impedance of 12 uH, 5 Hz to 20 MHz;
use a 100 uF/100 V electrolytic
capacitor and 1 uF/100 V ceramic
capacitor at the input.
Input Reflected Ripple Current (pk-pk)
-
40 mA
100 mA
Input Reflected Ripple Current (rms)
I2t Inrush Current Transient
-
-
30 mA
TBD
50 mA
-
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
