ISOLATED DC/DC CONVERTERS
48 Vdc Input 12 Vdc /25 A Output
0RQB-T0T12x RoHS Compliant PRELIMINARY Rev.B
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Isolated
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Low Cost
Fixed Frequency (250 kHz)
High Efficiency
SCP/OCP
Output Voltage Trim
Remote On/Off
High Power Density
Input Under Voltage Lockout
Input Over Voltage Lockout
Positive/Negative Remote Sense
Over Temperature Protection
Output Over Voltage Shutdown
Basic Insulation
Description
The 0RQB-T0T12x are isolated dc/dc converters that operate from a nominal 48 Vdc source. These units will
provide up to 300 W output power from a nominal 48 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
Active High
Model Number
Active Low
Voltage
12 Vdc
36 Vdc - 75 Vdc
25 A
300 W
95.5%
0RQB-T0T120
0RQB-T0T12L
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
I/O Isolation Voltage
Ambient Temperature
Storage Temperature
-
-
-
1500 V
-40 °C
-55 °C
85 °C
125 °C
Note: All specifications are typical at 25 °C unless otherwise stated.
Input Specifications
Parameter
Min
36 V
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-
-
Typ
48 V
100 mA
-
Max
75 V
-
10 A
-
Notes
Input Voltage
Input Current (no load)
Input Current (full load)
Remote Off Input Current
10 mA
Input Reflected Ripple Current
(pk-pk)
Input Reflected Ripple Current
(rms)
With simulated source impedance of 10
uH, 5 Hz to 20 MHz; use a 100 uF/100 V
electrolytic capacitor with ESR = 1 ohm
max, at 200 kHz.
-
-
50 mA
15 mA
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-
I2t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
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-
TBD
34.5 V
33.5V
-
35.5 V
-
32.5 V
Note: All specifications are typical at nominal input, full load 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
