ISOLATED DC/DC CONVERTERS
48 Vdc Input 3.3 Vdc / 15 A Output 1/16 Brick Converter
Apr. 12, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
xRSB-50T03A
RoHS Compliant
Rev.B
• Isolated
•
•
•
•
•
•
Input Under Voltage Lockout
Output Over Voltage Shutdown
OCP/SCP
• Fixed Frequency (600 kHz)
• High Efficiency
• High Power Density
• Low Cost
• Output Voltage Trim
• Basic Insulation
Over Temperature Protection
Remote On/Off
Positive/Negative Remote Sense
Description
The xRSB-50T03A is an isolated dc/dc converter that operates from a nominal 48 Vdc source. This unit will
provide up to 60 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, over current protection and under-voltage lockout. The converter is
provided in an industry standard sixteenth brick package.
Part Selection
Output
Input Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number
Through Hole
Model Number
SMD
Voltage
3.3 Vdc
36 Vdc - 75 Vdc
15 A
60 W
89%
0RSB-50T03A
SRSB-50T03A
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
Input Voltage Transient (100 ms)
Remote On/Off
-0.3 V
-0.3 V
-
100 V
18 V
-
-
-
-
I/O Isolation Voltage
Ambient Temperature
Storage Temperature
1500 V
85 °C
125 °C
-40 °C
-55 °C
Input Specifications
Parameter
Input Voltage
Min
36 V
Typ
48 V
-
Max
Notes
75 V
2.0 A
80 mA
3 mA
Input Current (full load)
Input Current (no load)
Remote Off Input Current
-
-
-
50 mA
1 mA
Tested with simulated source impedance of 15
uH, 5 Hz to 20 MHz; use a 100 uF/100 V
electrolytic capacitor with ESR=1 ohm max at
200 kHz at the input.
Input Reflected Ripple Current (pk-pk)
-
20 mA
50 mA
Input Reflected Ripple Current (rms)
I2t Inrush Current Transient
-
-
3 mA
7 mA
0.01 A2s 0.02 A2s
Turn On Voltage Threshold
Turn Off Voltage Threshold
31 V
30 V
32 V
31 V
35 V
34 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
