BEL 0RLC

ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Nov. 29, 2010
0RLC-25T
Series
RoHS Compliant
Rev.B
Features

Isolated

Output Over Voltage Shutdown

High Efficiency

Output Voltage Trim

High Power Density

OCP/SCP

Fixed Frequency (230 KHz)

Over Temperature Protection

Low Cost

Remote On/Off

Input Under Voltage Lockout

Remote On/Off Logic (Optional)

Class 1, Category 2, Isolated DC/DC Converter (refer to IPC-9592)
Applications

Networking

Computers and peripherals

Telecommunications
Description
The 0RLC-25T series are isolated dc/dc converters that operate from a nominal 48 Vdc source. These units will
provide up to 30 W of output power. These units are designed to be high efficient and very low cost. Features
include remote on/off, over current protection, and under voltage lockout. These converters are provided in an
industry standard package.
Part Selection
Output Voltage
Input Voltage
Max. Output
Current
7A
Max. Output
Power
23 W
Typical
Efficiency
88%
Model Number
Active High
0RLC-25T033
Model Number
Active Low
0RLC-25T03L
3.3 Vdc
36 Vdc - 75 Vdc
5.0 Vdc
12.0 Vdc
36 Vdc - 75 Vdc
5A
25 W
90%
0RLC-25T050
0RLC-25T05L
36 Vdc - 75 Vdc
2.5 A
30 W
90%
0RLC-25T120
0RLC-25T12L
15.0 Vdc
24.0 Vdc
36 Vdc - 75 Vdc
2.0 A
30 W
90%
0RLC-25T150
0RLC-25T15L
36 Vdc - 75 Vdc
1.25 A
30 W
89%
0RLC-25T240
0RLC-25T24L
Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging.
Part Number Explanation
0 R LC – 25 T xx x
1 2
3
4
5
6 7
1---Through hole mount
2---RoHS 6, change “R” to “7” means RoHS 5
3---Series name
4---Series code
5---Input range (36-75V)
6---Output voltage
7---Enable, “0” or “3” mean active high, and “L” means active low
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
1
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Nov. 29, 2010
Absolute Maximum Ratings
Min
Typ
Max
Unit
Input Voltage (continuous)
-0.3
-
80
V
Remote On/Off
-0.3
-
12
V
Ambient Temperature
-40
-
85
C
Storage Temperature
-55
-
125
C
Parameter
Notes
Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may
permanently damage the device.
Input Specifications
Parameter
Min
Typ
Max
Unit
36
-
75
V
Input Current (full load)
-
-
1.1
A
Input Current (no load)
-
25
40
mA
Remote Off Input Current
-
3
10
mA
Input Reflected Ripple Current
(rms)
-
10
20
mA
Input Reflected Ripple Current
(pk-pk)
-
40
60
mA
I t Inrush Current Transient
-
0.1
0.5
As
Turn-on Voltage Threshold
31
34
36
V
Turn-off Voltage Threshold
30
33
35
V
Input Voltage
2
Notes
With simulated source impedance of
10 uH, 5 Hz to 20 MHz. And use a 100
uF/ 100 V electrolytic capacitor with
ESR=1 ohm max, at 200 kHz.
2
Note: All specifications are typical at 25 C unless otherwise stated.
Output Specifications
Parameter
Min
Typ
Max
Unit
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
3.234
4.900
11.76
14.70
23.52
3.3
5.0
12.0
15.0
24.0
3.366
5.100
12.240
15.300
24.480
V
V
V
V
V
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
-
±1
±2
±5
±8
±10
±3
±5
±10
±15
±20
mV
mV
mV
mV
mV
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
-
±2
±4
±9
±10
±15
±5
±8
±18
±20
±30
mV
mV
mV
mV
mV
Notes
Output Voltage Set Point
Test condition: Vin=48 V,
IO=50% load at the output.
Line Regulation
Load Regulation
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
2
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Nov. 29, 2010
Output Specifications (continued)
Parameter
Min
Typ
Max
Unit
Regulation Over Temperature
(-40 C to +85 C)
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
-
30
40
100
120
150
50
70
170
200
240
mV
mV
mV
mV
mV
-
33
46
114
140
150
58
83
198
250
330
mV
mV
mV
mV
mV
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
-
40
40
40
80
85
75
75
75
120
150
mV
mV
mV
mV
mV
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
-
10
10
10
15
20
20
20
20
30
40
mV
mV
mV
mV
mV
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
0
0
0
0
0
-
7.0
5.0
2.5
2.0
1.25
A
A
A
A
A
7.7
5.5
3.0
2.2
1.5
-
12.0
8.0
4.2
3.4
2.2
A
A
A
A
A
Short Circuit Surge Transient
-
0.5
1
As
Turn on Time
-
10
25
mS
Overshoot at Turn on
-
0
5
%
0
0
0
0
0
-
3300
2200
330
330
330
Notes
Total Regulation
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
Ripple and Noise (pk-pk)
Ripple and Noise (rms)
Test condition of the output
ripple and noise: 0-20 MHz BW,
with a 1 µF ceramic capacitor
and a 10 uF/35 V electrolytic
capacitor at the output.
Output Current Range
Output DC Current Limit
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
2
Output Capacitance
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
uF
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
3
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Nov. 29, 2010
Output Specifications (continued)
Parameter
Transient Response
Min
Typ
Max
Unit
-
75
150
75
150
100
200
100
200
mV
uS
mV
uS
VO=
12.0 V
-
100
150
100
150
150
150
150
150
200
150
200
200
200
200
mV
uS
mV
uS
mV
uS
mV
VO=
15.0 V
-
150
100
200
100
200
200
300
200
uS
mV
uS
mV
Settling Time
-
200
300
uS
Overshoot
-
150
300
mV
-
300
150
300
500
300
500
uS
mV
uS
Overshoot
Settling Time
Overshoot
Settling Time
50% ~ 75%
Max Load
25% ~ 50%
Max Load
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
50% ~ 75%
Max Load
25% ~ 50%
Max Load
50% ~ 75%
Max Load
25% ~ 50%
Max Load
Settling Time
Overshoot
Settling Time
Overshoot
50% ~ 75%
Max Load
25% ~ 50%
Max Load
50% ~ 75%
Max Load
Settling Time
Overshoot
Settling Time
25% ~ 50%
Max Load
VO=
3.3 V
-
VO=
5.0 V
-
VO=
24.0 V
-
Notes
Test condition of the transient
response: di/dt=0.1 A/us, Vin=48 V,
with a 220 uF/35 V electrolytic
capacitor at the output.
Note: All specifications are typical at nominal input, full load at 25°C unless otherwise stated.
General Specifications
Parameter
Min
Typ
Max
Unit
85
87
87
87
86
200
1500
-
88
90
90
90
89
230
1500
260
-
%
%
%
%
%
kHz
V
pF
90
-
110
110
-
%
C
3.90
5.70
13.60
17.25
27.60
-
20
5.0
7.0
14.2
22.5
36.0
-
V
V
V
V
V
g
Notes
Efficiency
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
Switching Frequency
I/O Isolation Voltage
Isolation Capacitance
Output Voltage Trim Range
Over Temperature Protection
Over Voltage Protection
VO=3.3 V
VO=5.0 V
VO=12.0 V
VO=15.0 V
VO=24.0 V
Weight
MTBF
2,602,427
hours
2.0 x 1.0 x 0.438
50.8 x 25.4 x 11.14
-
Measured at Vin=48 V, IO=Io, max
Test condition of Over Voltage Protection:
Vin=48 V, Io=100% load at 25 C
ambient.
Calculated Per Bell Core SR-332
(IO = 80% load; Vin=48 V; Vo=3.3 V, Ta =
25 C)
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Note: All specifications are typical 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
4
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Nov. 29, 2010
Remote On/Off
Parameter
Signal Low (Unit On)
Signal High (Unit Off)
Signal Low (Unit Off)
Signal High (Unit On)
Active Low
Active High
Current Sink
Min
-0.3
Typ
-
Max
0.8
Unit
V
3.5
-
12
V
-0.3
-
0.8
V
3.5
-
12
V
0.3
-
0.75
mA
Notes
The remote on/off pin open, Unit off
The remote on/off pin open, Unit on
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.
Vout
Rtrim _ down
Rtrim _ up
Rtrim_down
A

B
Vnom  Vadj
Module
Trim
GND
Vout
C

D
Vadj  Vnom
Module Trim
Rtrim_up
GND
Vnom
A
B
C
D
24.0
272.305
15.664
31.634
3.010
15.0
92.125
9.360
18.400
2.000
12.0
53.320
9.260
14.025
3.650
5.0
19.300
15.120
6.350
10.000
3.3
21.711
40.610
13.032
30.100
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
5
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Nov. 29, 2010
Efficiency Data
90%
80%
75%
EFFICIENCY
EFFICIENCY
85%
36V
48V
75V
70%
65%
60%
55%
50%
0.7A
1.75A
3.5A
5.25A
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
36
48
75
0.5A
7A
1.25A
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
36
48
75
0.625A
1.25A
3.75A
5A
0RLC-25T050
EFFICIENCY
EFFICIENCY
0RLC-25T033
0.25A
2.5A
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
1.875A
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
36
48
75
0.2A
2.5A
0.5A
1.0A
1.5A
2.0A
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
0RLC-25T150
EFFICIENCY
0RLC-25T120
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
0.125A
36
48
75
0.3215A
0.625A
0.9375A
1.25A
OUTPUT CURRENT (A)
0RLC-25T240
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
6
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Nov. 29, 2010
Thermal Derating Curves
0RLC-25T033
0RLC-25T050
0RLC-25T120
0RLC-25T150
0RLC-25T240
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
7
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Nov. 29, 2010
Ripple and Noise Waveforms
Ripple and noise at full load, 3.3 Vdc/7 A output
Ripple and noise at full load, 5.0 Vdc/5 A output
Ripple and noise at full load, 12 Vdc/2.5 A output
Ripple and noise at full load, 15 Vdc/2 A output
Ripple and noise at full load, 24 Vdc/1.25 A output
Note: Ripple and noise at 48 Vdc input, with a 0.47 uF ceramic cap 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
8
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Nov. 29, 2010
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Transient Response Waveforms
Transients 25% to 50% load 3.3 Vdc output
Transients 50% to 75% load 3.3 Vdc output
Transients 25% to 50% load 5.0 Vdc output
Transients 50% to 75% load 5.0 Vdc output
Transients 25% to 50% load 12 Vdc output
Transients 50% to 75% load 12 Vdc output
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
9
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Nov. 29, 2010
Transient Response Waveforms (continued)
Transients 25% to 50% load 15 Vdc output
Transients 25% to 50% load 24 Vdc output
Transients 50% to 75% load 15 Vdc output
Transients 50% to 75% load 24 Vdc output
Note: Transient response at 48 Vdc input, di/dt=0.1 A/uS, with external 220 uF electrolytic cap and 0.47 uF
ceramic cap 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
10
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Nov. 29, 2010
Mechanical Outline
Pin Connections
Pin
Function
1
2
3
4
5
6
Vin+
VinCNT
Vo+
VoTrim
Note: This module is recommended and compatible with Pb-Free Wave Soldering and must be soldered
using a peak solder temperature of no more than 260 ºC for less than 5 seconds.
Note:
1) All Pins: Material - Copper Alloy;
Finish – 3 micro inches minimum Gold over 50 micro inches minimum Nickel plate.
2) Undimensioned components are shown for visual reference only.
3) All dimensions in inches (mm); Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm).
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
11
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
OutputConverter
Nov. 29, 2010
Bel Power,
Inc. , a subsidiary of Bel Fuse, Inc.
Revision History
Date
Revision
Changes Detail
Approval
2007-03-02
A
First Release.
XF Jiang
2010-11-29
B
Update the notes in Remote On/Off.
XF Jiang
.
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
2010 Bel Fuse Inc. Specifications subject to change without notice. 112910
12
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
Bel Fuse Ltd.
8F/ 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com