Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 Vdc Input, 3.3 Vdc/2 A, 5 Vdc/2 A, 12 Vdc/1 A, 24 Vdc/0.5 A Output
• Isolated • Low Cost
• Fixed Frequency • Trim
• High Power Density • OCP/SCP
• High Efficiency
• Output Over-Voltage Shutdown
• Safety Approval to UL60950-1 (Pending)
• Remote On/Off
• Active Low/High (Option)
Description
The 0RLC-10T Series are isolated dc/dc converters that operate from a nominal 48 Vdc source. These units will
provide up to 12 W of output power from a nominal 48 Vdc input. These units are designed to be highly efficient
and very low cost. Features include remote on/off, over current protection and short circuit protection. These
converters are provided in an industry standard package.
Part Selection
Output
Voltage Input Voltage Max. Output
Current Max. Output
Power Typical
Efficiency Model Number
Acti ve H igh Model Num b er
Active Low
3.3 Vdc 36 Vdc - 75 Vdc 2 A 6.6 W 77% 0RLC-10T033 0RLC-10T03L
5.0 Vdc 36 Vdc - 75 Vdc 2 A 10 W 82% 0RLC-10T050 0RLC-10T05L
12 Vdc 36 Vdc - 75 Vdc 1 A 12 W 83% 0RLC-10T120 0RLC-10T12L
24 Vdc 36 Vdc - 75 Vdc 0.5 A 12 W 85% 0RLC-10T240 0RLC-10T24L
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 - 75 V
Peak/Surge Input Voltage -0.3 V - 100 V Transients of 100 ms or less in duration
Remote On/Off (Active Low) -0.3 V - 18 V
Remote On/Off (Active High) -0.3 V - 7 V
Ambient Temperature 0 °C - 70 °C
Storage Temperature -40 °C - 125 °C
Input Specifications
Parameter Min Typ Max Notes
Input Voltage 36 V - 75 V
Input Current (no load) - - 40 mA
Input Current (full load) - - 0.45 A
Remote Off Input Current (Active Low) - 5 mA 10 mA
Remote Off Input Current (Active High) - 10 mA
Input Reflected Ripple Current
(pk-pk) - 15 mA 30 mA
Input Reflected Ripple Current
(rms) - 5 mA 10 mA
With simulated source impedance of
10 uH, 5 Hz to 20 MHz; use a
47uF/100 V electrolytic capacitor
with ESR = 1 ohm max. at 200 kHz
at 25 °C.
I2t Inrush Current Transient - 0.039 A2s 0.062 A2s
Turn-on Voltage Threshold - 30 V -
Note: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
0RLC-10Txxx Series RoHS Compliant Rev.A
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 Vdc Input, 3.3 Vdc/2 A, 5 Vdc/2 A, 12 Vdc/1 A, 24 Vdc/0.5 A Output
Output Specifications
Parameter Min Typ Max Notes
Output Voltage Set Point
VO=3.3 V
VO=5.0 V
VO=12 V
VO=24 V
3.201 V
4.850 V
11.64 V
23.28 V
3.30 V
5.00 V
12.00 V
24.00 V
3.399 V
5.150 V
12.36 V
24.72 V
Vin=48 V for all outputs
Line Regulation
VO=3.3 V
VO=5.0 V
VO=12 V
VO=24 V
-
-
-
-
5 mV
10 mV
20 mV
35 mV
10 mV
15 mV
36 mV
48 mV
Load Regulation
VO=3.3 V
VO=5.0 V
VO=12 V
VO=24 V
-
-
-
-
10 mV
15 mV
36 mV
48 mV
15 mV
25 mV
60 mV
80 mV
Regulation Over Temperature
(0 °C to 70 °C) - 75 mV 150mV
Output Current
VO=3.3 V
VO=5.0 V
VO=12 V
VO=24 V
0.2 A
0.2 A
0.1 A
0.05 A
-
-
-
-
2.0 A
2.0 A
1.0 A
0.5 A
Current Limit Threshold
VO=3.3 V
VO=5.0 V
VO=12 V
VO=24 V
-
-
-
-
3.0 A
3.0 A
1.5 A
0.75 A
-
-
-
-
Short Circuit Surge Transient - TBD - A2s
Ripple and Noise (rms)
VO=3.3 V
VO=5.0 V
VO=12 V
VO=24 V
-
-
-
10 mV
18 mV
21 mV
45 mV
15 mV
30 mV
40 mV
70 mV
Ripple and Noise (pk-pk)
VO=3.3 V
VO=5.0 V
VO=12 V
VO=24 V
-
-
-
-
40 mV
60 mV
80 mV
120 mV
60 mV
100 mV
120 mV
180 mV
0 - 20 MHz BW ,
with 1 uF ceramic load
capacitance
Turn on Time
Power On
Remote On
-
0.5 mS
-
-
200 mS
40 mS
Overshoot at Turn on - 0% 3%
Output Capacitance
VO=3.3 V
VO=5.0 V
VO=12 V
VO=24 V
0 uF
0 uF
0 uF
0 uF
-
-
-
-
800 uF
800 uF
100 uF
20 uF
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 Vdc Input, 3.3 Vdc/2 A, 5 Vdc/2 A, 12 Vdc/1 A, 24 Vdc/0.5 A Output
Output Specifications (continued)
Parameter Min Typ Max Notes
Transient Response
Overshoot - 100 mV 150 mV
50% ~ 100%
Max Load Settling Time - 200 uS 300 uS
Overshoot - 100 mV 150 mV
100% ~ 50%
Max Load Settling Time
VO=3.3 V
- 200 uS 300 uS
Overshoot - 100 mV 150 mV
50% ~ 100%
Max Load Settling Time - 100 uS 150 uS
Overshoot - 100 mV 150 mV
100% ~ 50%
Max Load Settling Time
VO=5.0 V
- 100 uS 150 uS
Overshoot - 150 mV 250 mV
50% ~ 100%
Max Load Settling Time - 150 uS 200 uS
Overshoot - 150 mV 250 mV
100% ~ 50%
Max Load Settling Time
VO=12 V
- 150 uS 200 uS
Overshoot - 350 mV 500 mV
50% ~ 100%
Max Load Settling Time - 200 uS 250 uS
Overshoot - 350 mV 500 mV
100% ~ 50%
Max Load Settling Time
VO=24 V
- 200 uS 250 uS
di/dt = 0.1 A/uS; Vin = 48
V; Ta = 25 °C and 1 uF
ceramic capacitor
Note: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
General Specifications
Parameter Min Typ Max Notes
Efficiency
VO=3.3 V
VO=5.0 V
VO=12 V
VO=24 V
73%
78%
79%
81%
77%
82%
83%
85%
-
-
-
-
Vin=48 V, IO= IOmax
Switching Frequency 200 kHz 250 kHz 300 kHz
Output Trim Range 95%VO - 105%VO For all outputs
MTBF TBD Calculated Per Bell Core SR-332 (IO =
Nomal; Ta = 25 °C)
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
1.91 x 0.98 x 0.477
48.51 x 24.89 x 12.12
Weight - 10.3 g -
Note: All specifications are typical at 25 °C unless otherwise stated.
Control Specifications
Parameter Min Typ Max Notes
Remote On/Off
Signal Low (Unit On) -0.3 V - 0.8 V
Signal High (Unit Off) Active Low 3.5 V - 18 V
Signal Low (Unit Off) -0.3 V - 0.8 V
Signal High (Unit On) Active High 3.5 V - 7 V
The remote on/off pin open, Unit
On.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 Vdc Input, 3.3 Vdc/2 A, 5 Vdc/2 A, 12 Vdc/1 A, 24 Vdc/0.5 A Output
Output Trim Equations
Equations for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) and the nominal
output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between
the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of
the resistors should be used for any given application.
B
VV A
R
adjnom
TrimDown −
−
=
D
VV C
R
nomadj
TrimUp −
−
=
Vnom A B C D
24 489.490 28.310 26.660 6.810
12 113.550 16.990 13.020 6.490
5.0 56.410 51.200 18.228 36.500
3.3 21.628 75.400 13.020 64.900
Efficiency Data
50.0%
55.0%
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
0.20 0.50 1.00 1.50 2.00
OUTPUT CURRENT(A)
EFFICIENCY
36V
48V
75V
50.00%
55.00%
60.00%
65.00%
70.00%
75.00%
80.00%
85.00%
90.00%
0.00 0.50 1.00 1.50 2.00
OUTPUT CURRENT (A)
EFFICIENCY
36V
48V
75V
0RLC-10T033 0RLC-10T050
50.00%
55.00%
60.00%
65.00%
70.00%
75.00%
80.00%
85.00%
90.00%
0.00 0.20 0.40 0.60 0.80 1.00
OUTPU T CURRENT (A)
EFFICIENCY
36V
48V
75V
50.00%
55.00%
60.00%
65.00%
70.00%
75.00%
80.00%
85.00%
90.00%
0.05 0.13 0.25 0.38 0.50
OUTPUT CURRENT (A)
EFFICIENCY
36
V
48
V
75
V
0RLC-10T120 0RLC-10T240
Module
Vout
Trim
GND Rtri m u p
Module
Vout
Trim
GND
Rtrimdown
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 Vdc Input, 3.3 Vdc/2 A, 5 Vdc/2 A, 12 Vdc/1 A, 24 Vdc/0.5 A Output
Thermal Derating Curves
Vo=3.3 V, Io=2 A Vo=5 V, Io=2 A
Vo=12 V, Io=1 A Vo=24 V, Io=0.5 A
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 Vdc Input, 3.3 Vdc/2 A, 5 Vdc/2 A, 12 Vdc/1 A, 24 Vdc/0.5 A Output
Ripple and Noise Waveforms
Vo=3.3 V Vo=5.0 V
Vo=12 V Vo=24 V
Note: Ripple and noise at full load, 48 Vdc input, with a 1 uF ceramic capacitor at the output, and
Ta=25 deg C.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 Vdc Input, 3.3 Vdc/2 A, 5 Vdc/2 A, 12 Vdc/1 A, 24 Vdc/0.5 A Output
Transient Response Waveforms
Vout=3.3 V 50% to 100% Load Transients Vout=3.3 V 100% to 50% Load Transients
Vout=5.0 V 50% to 100% Load Transients Vout=5.0 V 100% to 50% Load Transients
Vout=12 V 50% to 100% Load Transients Vout=12 V 100% to 50% Load Transients
Vout=24 V 50% to 100% Load Transients Vout=24 V 100% to 50% Load Transients
Note: Transient response at Vin=48 V, di/dt=0.1 A/uS, with external 1 uF ceramic capacitor, and Ta=25 deg C.
©
2007 Bel Fuse Inc. Specifications subject to change without notice. 030207
CORPORATE FAR EAST EUROPE
Bel Fuse Inc. Bel Fuse Ltd. Bel Fuse Europe Ltd.
206 Van Vorst Street 8F/ 8 Luk Hop Street Preston Technology Management Centre
Jersey City, NJ 07302 San Po Kong Marsh Lane, Suite G7, Preston
Tel 201-432-0463 Kowloon, Hong Kong Lancashire, PR1 8UD, U.K.
Fax 201-432-9542 Tel 852-2328-5515 Tel 44-1772-556601
www.belfuse.com Fax 852-2352-3706 Fax 44-1772-888366
www.belfuse.com www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 Vdc Input, 3.3 Vdc/2 A, 5 Vdc/2 A, 12 Vdc/1 A, 24 Vdc/0.5 A Output
Mechanical Outline
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
Pin Connections
Pin Function
1 Vin+
2 Vin-
3 Enable
4 Vo+
5 Trim
6 Vo-
