ISOLATED DC/DC CONVERTERS
48 Vdc Input
53 Vdc/8 A Output
Sep. 19, 2011
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
0RHB-Q2T53x
RoHS Compliant PRELIMINARY Rev.D
Isolated
Fixed Frequency
High Efficiency
OCP/SCP
High Power Density
Over Temperature Protection
Remote On/Off
Low Cost
Input Under Voltage Lockout
Output Over-Voltage Shut Down
Output Voltage Trim
Basic Insulation
Class 2, Category 2, Isolated DC/DC Converter (refer to IPC-9592)
Description
The 0RHB-Q2T53x is isolated DC/DC converters that operate from a nominal 48 Vdc source. These units will
provide up to 424W of output power from a nominal 48 Vdc input. This unit is designed to be highly efficient and
low cost . Features include remote on/off, over current protection and input undervoltage lockout. This converter
is provided in an industry standard half- brick package.
Part Selection
Output
Input Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number
Active High
Model Number
Active Low
Voltage
53 Vdc
48 Vdc
8 A
424W
94%
0RHB- Q2T530
0RHB- Q2T53L
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
Input Voltage (continuous)
-0.3 V
-
80 V
Remote On/Off
-0.3 V
-
-
-
-
-
18 V
1500 V
85 C
I/O Isolation Voltage
Ambient Temperature
Storage Temperature
-40 C
-55 C
125 C
Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may
permanently damage the device.
Input Specifications
Parameter
Min
36 V
-
Typ
48 V
-
Max
72 V
Notes
Input Voltage
Input Current (full load)
Input Current (no load)
Remote Off Input Current
12.6 A
-
-
80 mA
20 mA
120 mA
30 mA
Tested with simulated source impedance
of 12 uH, 5 Hz to 20 MHz; Use 150 uF/100
V electrolytic capacitor with ESR=1 ohm
max, at 200 kHz@25°C.
Input Reflected Ripple Current (rms)
I2t Inrush Current Transient
-
-
200 mA
1 A2s
-
-
Turn-on Voltage Threshold2
Turn-off Voltage Threshold2
33 V
32 V
-
-
35 V
34 V
Note: All specifications are typical at 25 C unless otherwise stated.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
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