ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input
+12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
0RXU-75TD10
•
•
•
•
•
•
Isolated
Fixed Frequency (300 kHz)
High Efficiency
High Power Density
RoHS Compliant
•
•
•
•
•
•
Low Cost
SCP/OCP
Remote On/Off
Rev.A
Output Voltage Trim
Output Over-Voltage
Protection (OVP)
Over Temperature Protection
Input Under- Voltage Lockout
(UVLO)
UL60950-1 Recognized
(UL/cUL) and CE Mark
Description
The 0RXU-75TD10 is an isolated dc/dc converter that operates from a nominal 48 Vdc source. It provides up to
78 W of output power with two output voltages. Features include remote on/off, output adjust, short circuit
protection, over current protection, over-temperature shutdown, output over voltage protection, and input under
voltage lockout. This converter is provided in a compact, though-hole package that is easy to use and provides
good thermal performance.
Part Selection
Output Voltage
+12 Vdc/-12 Vdc
Input Voltage
36 Vdc - 75 Vdc
Max. Output
Current
5 A/1.5 A
Max. Output
Power
78 W
Typical
Efficiency
90%
Model Number
0RXU-75TD10
Notes:
1. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
2. Add “G” suffix at the end of the model numbers listed above to indicate “Tray Packaging”.
Absolute Maximum Ratings
Parameter
Input Voltage
Remote On/Off
Ambient Temperature
Storage Temperature
Min
-0.3 V
-0.3 V
-40
°C
-40
°C
Typ
-
-
-
-
Max
100 V
30 V
85
°C
125
°C
Notes
100 V for 10 mS Max.
Input Specifications
Parameter
Input Voltage
Input Current (no load)
Input Current (full load)
Remote Off Input Current
Input Reflected Ripple Current
(rms)
Input Reflected Ripple Current
(pk-pk)
Turn On Voltage Threshold
Turn Off Voltage Threshold
Min
36 V
-
-
-
-
-
32 V
30 V
Typ
-
-
-
10 mA
10 mA
50 mA
34 V
31 V
Max
75 V
200 mA
3A
20 mA
30 mA
100 mA
35 V
33 V
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 200k Hz
Notes
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
ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input
+12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
Output Specifications
Parameter
Output Voltage Set Point
V
O1
=+12 V
V
O2
=-12 V
Load Regulation
V
O1
=+12 V
V
O2
=-12 V
Line Regulation
V
O1
=+12 V
V
O2
=-12 V
Regulation Over Temperature
Output Current
V
O1
=+12 V
V
O2
=-12 V
Output Current Limit
V
O1
=+12 V
V
O2
=-12 V
Short Circuit Protection
Startup Time
Power Up
Remote On/Off
Overshoot at Turn On
Ripple and Noise (rms)
V
O1
=+12 V
V
O2
=-12 V
Ripple and Noise (pk-pk)
V
O1
=+12 V
V
O2
=-12 V
Output Capacitance
Transient Response
50% ~ 75%
Max Load
Overshoot
Settling Time
V
O1
=+12 V
75% ~ 50%
Max Load
Overshoot
Settling Time
Overshoot
Settling Time
V
O2
=-12 V
75% ~ 50%
Max Load
Overshoot
Settling Time
-
-
-
-
-
-
-
-
300 mV
150 uS
300 mV
150 uS
300 mV
150 uS
300 mV
150 uS
600 mV
300 uS
600 mV
300 uS
600 mV
300 uS
600 mV
300 uS
Test conditions:
di/dt=0.5 A/us, Vin=48 V
-
-
0 uF
75 mV
40 mV
-
150 mV
150 mV
1,000 uF
-
-
25 mV
10 mV
50 mV
50 mV
Test conditions:
0-20 MHz Bandwidth, with a 1 uF
ceramic capacitor at the output.
-
-
-
10 mS
7 mS
-
20 mS
20 mS
5%
6A
1.8 A
-
-
-
-
7.5 A
2.25 A
-
Hiccup Mode
Hiccup Mode
0.06 A
0.06 A
-
-
5A
1.5 A
-
-
-
-
-
-
1% V
O
1% V
O
0.02% /°C
Io1=50% Imax1; Io2=50% Imax2
(-40
°C
to +85
°C)
-
-
-
-
2% V
O
4% V
O
ΔIo1=50%
Imax1; Io2=50% Imax2
ΔIo2=50%
Imax2; Io1=50% Imax1
Min
+11.76 V
-11.86 V
Typ
+12 V
-12.1 V
Max
+12.24 V
-12.34 V
Notes
Vin=48 V, lo=50% load
For both V
O1
and V
O2
50% ~ 75%
Max Load
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
ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input
+12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
General Specifications
Parameter
Efficiency
Switching Frequency
I/O Isolation Voltage
Isolation Capacitance
Output Trim Range
Output Over Voltage Protection
V
O1
=+12 V
V
O2
=-12 V
Over-temperature
MTBF
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
-
2.28 x 2.4 x 0.48
57.9 x 61.0 x 12.09
45 g
Min
84%
270k Hz
-
-
90%
+13.5 V
-13.5 V
-
Typ
90%
300k Hz
1500 V
1500 pF
-
+15 V
-15 V
130
°C
2,366,749 hours
Max
-
330k Hz
-
-
110%
+17 V
-17 V
-
Hiccup Mode
Hiccup Mode
Calculated Per Bell Core SR-332 (I
O
=
80% Imax; T
A
= 25
°C)
Notes
V
in
= 48 V; Full Load
-
Note:
All specifications are typical at nominal input, full load at 25
°C
unless otherwise stated.
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit On)
Signal High (Unit Off)
Min
-0.3 V
3.5 V
Typ
-
-
Max
1.8 V
12 V
Notes
Active Low; Remote On/Off pin open, Unit off.
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 V
o1
. The Trim Up resistor should be connected between the Trim pin and COM. Only one of the resistors
should be used for any given application.
R
trim
_
down
99.86
=
−
20.5
V
nom
−
V
adj
Vout1
Rtrim_down
Module
Trim
COM
R
trim
_
up
=
26.25
−
10
V
adj
−
V
nom
Vout1
Module
Trim
Rtrim_up
Note:
Output voltage Vo=12.012 V
COM
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 CONVERTERS
36 Vdc - 75 Vdc Input
+12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
Efficiency Data
0RXU-75TD10 module
0.950
0.900
Efficiency
0.850
0.800
0.750
0.700
0.650
0.600
10%load
25%load
50%load
75%load
100%load
Vin=36V
Vin=48V
Vin=75V
Output Current
Thermal Derating Curve (Vin=48 V)
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 CONVERTERS
36 Vdc - 75 Vdc Input
+12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
Ripple and Noise Waveforms
Ripple and noise at full load, 36 V input, ch1 (+)12 V/5 A output, (-)12 V/1.5 A
Ripple and noise at full load, 48 V input, ch1 (+)12 V/5 A output, (-)12 V/1.5 A
Ripple and noise at full load, 75 V input, ch1 (+)12 V/5 A output, (-)12 V/1.5 A
Note:
With a 1uF ceramic capacitor at the output, 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
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