ISOLATED DC/DC CONVERTERS
48 Vdc Input 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
May 17, 2011
Bel Power Inc., a subsidiary of Bel Fuse Inc.
RoHS Compliant
Rev.C
0RQB-C5T Series
Features
Isolated
High Efficiency
High Power Density
Low Cost
Input Under Voltage Lockout
Fixed Frequency (330 kHz)
Active Low/High (Option)
Output Over Voltage Shutdown
OCP/SCP
Over Temperature Protection
Remote On/Off
Output Voltage Trim
Positive/Negative Remote Sense
Input Over Voltage Lockout
Basic Isolation
UL60950-1 Recognized (UL/cUL)
Applications
Networking
Computers and peripherals
Telecommunications
Description
The 0RQB-C5T Series are isolated dc/dc converters that operate from a nominal 48 Vdc source. These units will
provide up to 150 W of output power from a nominal 48 Vdc input. These units are designed to be highly efficient
and low cost. Typical efficiency of 12 Vdc output at 48 Vdc input at full load is 93%. Features include remote
on/off, over current protection and under-voltage lockout. These converters are provided in an industry standard
quarter brick package.
Part Selection
Output
Voltage
12 V
5.0 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
Input Voltage
36 V - 75 V
36 V - 75 V
36 V - 75 V
36 V - 75 V
36 V - 75 V
36 V - 75 V
36 V - 75 V
Max. Output
Current
12 A
30 A
46 A
50 A
50 A
50 A
50 A
Max. Output
Power
144 W
150 W
152 W
125 W
90 W
75 W
60 W
Typical
Efficiency
93.0%
92.5%
91.0%
90.5%
88.0%
85.0%
83.0%
Model Number
Active High
0RQB-C5T120
0RQB-C5T050
0RQB-C5T033
0RQB-C5T025
0RQB-C5TV80
0RQB-C5TV50
0RQB-C5TV20
Model Number
Active Low
0RQB-C5T12L
0RQB-C5T05L
0RQB-C5T03L
0RQB-C5T02L
0RQB-C5TV8L
0RQB-C5TV5L
0RQB-C5TV2L
Notes:
Add “G” suffix at the end of the model number to indicate Tray Packaging.
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 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
May 17, 2011
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Part Number Explanation
0 R QB – C5 T xx x
1 2
3
4
5
6 7
1---Through hole
2---RoHS 6, change “R” to “7” means RoHS 5
3---Series name, 1/4 Brick
4---Series code
5---Input range 48V wide (36-75V)
6---Output voltage
7---Option, “x” of the model part number to be 0-9, A-Z, which will represent the special request of
customer.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Remote On/Off
I/O Isolation Voltage
Ambient Temperature
Storage Temperature
Min
-0.3
-0.3
-
-40
-55
Typ
-
-
-
-
-
Max
80
18
2000
85
125
Unit
V
V
V
C
C
Notes
Note:
All specifications are typical at nominal input, full load at 25
C
unless noted.
Input Specifications
Parameter
Input Voltage
Input Current (full load)
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Input Current (no load)
Remote Off Input Current
Input Reflected Ripple Current
(pk-pk)
Input Reflected Ripple Current
(rms)
I t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Input over voltage
Lockout
2
Min
36
-
-
-
-
-
-
-
-
Typ
48
-
-
-
-
-
-
-
120
10
Max
75
4.5
4.9
4.9
4.1
3.0
2.6
2.1
180
15
15
3
0.1
35
34
80
Unit
V
A
A
A
A
A
A
A
mA
mA
mA
mA
As
V
V
V
2
Notes
-
-
-
32
30
76
10
1.5
0.05
34
32
78
Tested 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
200 kHz at 25
C.
Note:
All specifications are typical at nominal input, full load at 25
C
unless noted.
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 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
May 17, 2011
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Parameter
Min
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
11.790
4.925
3.260
2.450
1.770
1.477
1.176
-3.5
Typ
12.030
5.004
3.308
2.503
1.808
1.500
1.200
-
8
5
3
10
5
2
60
40
30
20
15
-
-
-
-
15.5
40
60
60
3
25
20
20
15
70
60
50
45
40
55
40
-
0
Max
12.270
5.075
3.360
2.550
1.844
1.523
1.224
3.5
15
15
6
20
10
5
100
65
50
40
30
12
30
46
50
18
45
65
65
5
30
25
20
20
90
80
70
60
60
70
60
100
5
Unit
V
V
V
V
V
V
V
%Vo,set
Notes
Output Specifications
Output Voltage Set Point
Vin=48V, Io=50% load
Output Voltage Set Point
Line Regulation
V
O
=12 V
V
O
=5.0 V
V
O
=1.2 V-3.3 V
Load Regulation
V
O
=5.0 V-12 V
V
O
=2.5 V-3.3 V
V
O
=1.2 V-1.8 V
Regulation Over Temperature
(-40
C
to +85
C)
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V-1.2 V
Output Current
Vo=12 V
Vo=5.0 V
Vo=3.3 V
Vo=1.2 V-2.5 V
Current Limit Threshold
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=1.2 V-2.5 V
Short Circuit Surge Transient
Ripple and Noise (rms)
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=1.2 V-2.5 V
Ripple and Noise (pk-pk)
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=1.8 V
Vo=2.5 V
V
O
=1.5 V
V
O
=1.2 V
Turn on Time
Overshoot at Turn on
Over all operating input voltage,
resistive load, and temperature
conditions.
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
14
35
50
55
-
-
-
-
-
-
-
-
-
-
-
10
-
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
A
A
A
A
A
A
A
A
As
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mS
%
2
Test conditions:
0-20 MHz BW, with a 1 uF
ceramic capacitor and a 10 uF
Tantalum capacitor at the output.
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 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
May 17, 2011
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Min
0
0
0
-
V
O
=12.0 V
-
-
-
-
-
V
O
=5.0 V
-
-
-
-
V
O
=3.3 V
-
-
-
-
V
O
=2.5 V
-
-
-
Vo=1.8 V
V
O
=1.5 V
-
-
-
-
-
V
O
=1.2 V
-
-
Typ
-
-
-
600
200
600
200
250
100
250
100
100
200
100
200
100
300
100
300
100
200
100
200
100
200
100
200
Max
2200
10000
20000
800
300
800
300
375
200
375
200
200
300
200
300
200
400
200
400
140
300
140
300
120
300
120
300
Unit
uF
uF
uF
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
Test conditions: di/dt = 0.1
A/uS, Vin=48 V, with a 1 uF
ceramic capacitor and a 10 uF
Tantalum capacitor at the
output.
Notes
Output Specifications (continued)
Parameter
Output Capacitance
V
O
=12.0 V
V
O
=5.0 V
V
O
=1.2 V-3.3 V
Transient Response
50% ~ 75%
Max Load
75% ~ 50%
Max Load
50% ~ 75%
Max Load
75% ~ 50%
Max Load
50% ~ 75%
Max Load
75% ~ 50%
Max Load
50% ~ 75%
Max Load
75% ~ 50%
Max Load
50% ~ 75%
Max Load
75% ~ 50%
Max Load
50% ~ 75%
Max Load
75% ~ 50%
Max Load
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Note:
All specifications are typical at nominal input, full load at 25
C
unless noted.
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 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
May 17, 2011
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Min
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
90
89
88
87
85
82
80
280
-
-
-
80
-
-
Typ
93
92.5
91
90.5
88
85
83
330
1500
-
-
-
125
130
1,109,917
Max
-
-
-
-
-
-
-
380
-
2000
10
110
-
-
Unit
%
%
%
%
%
%
%
kHz
pF
V
% Vo
% Vo
C
% Vo
Hours
Vin=48V, full load, Hiccup mode
Calculated Per Bell Core SR-332 (I
O
=80% load, Vin=48 V, Vo=3.3 V; T
a
=
25
C)
The total voltage increased by trim
and remote sense should not exceed
10%Vo.
Notes
General Specifications
Parameter
Efficiency
Vin=48V, full load
Switching Frequency
Isolation capacitance
Input to Output Isolation Voltage
Remote Sense Compesation
Output Voltage Trim Range
Over Temperature Protection
Over Voltage Protection
MTBF
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
2.30 x 1.45 x 0.395
58.42 x 36.83 x 10.03
-
41
-
-
g
Note:
All specifications are typical at nominal input, full load at 25
C
unless noted.
Remote On/Off
Parameter
Signal Low (Unit On)
Signal High (Unit Off)
Signal Low (Unit Off)
Signal High (Unit On)
Current Sink
Active Low
Active High
Min
-0.3
2.4
-0.3
2.4
0
Typ
-
-
-
-
-
Max
0.8
18
0.8
18
0.75
Unit
V
V
V
V
mA
Notes
0RQB-C5TxxL.
The remote on/off pin open, Unit off.
0RQB-C5Txx0.
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
5
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