ISOLATED DC/DC CONVERTERS
48 Vdc Input 28 Vdc /7 A Output
0RQB-D0T28x
RoHS Compliant
Rev.B
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•
•
•
•
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Fixed Frequency (300 kHz)
Isolated
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Output Over Voltage Latch Off
Over Temperature Protection
Short Circuit Latch Off
Low Cost
High Efficiency
High Power Density
Input Under Voltage Lockout
Basic Insulation
Remote On/Off
Droop Load Share with 0.125V/A
Wide Output Trim Range
Voltage Fold-back Constant
Current Limit
Description
The 0RQB-D0T28x is isolated dc/dc converter that operates from a nominal 48 Vdc source. This unit will provide
up to 196 W of output power from a nominal 48 Vdc input. The unit is designed to be highly efficient and low cost.
Features include remote on/off, output current limit protection, input under-voltage lockout and output over-
voltage latch off. This converter is 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
28 Vdc
36 Vdc - 75 Vdc
7 A
196 W
92%
0RQB-D0T280
0RQB-D0T28L
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
Continuous Input Voltage
-0.3 V
-
80 V
Transient Input Voltage
Remote On/Off
-
-
-
-
-
-
100 V
18 V
100 mS Max
-0.3 V
-
I/O Isolation Voltage
Ambient Temperature
Storage Temperature
1500 V
85 °C
125 °C
-40 °C
-55 °C
Note: All specifications are typical at 25 °C unless otherwise stated.
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
36 V
48 V
75 V
Input Current (no load)
Input Current (full load)
Remote Off Input Current
-
-
-
40 mA
-
60 mA
7 A
14 mA
20 mA
Input Reflected Ripple Current
(pk-pk)
With simulated source impedance of 12
uH, 5 Hz to 20 MHz; use a 220uF/100 V
electrolytic capacitor with ESR = 1 ohm
max. at 200 kHz
-
-
20 mA
5 mA
30 mA
10 mA
Input Reflected Ripple Current
(rms)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
