BEL 0RQB

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
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
0RQB-C5T Series
RoHS Compliant
Rev.C
Features

Isolated

Output Over Voltage Shutdown

High Efficiency

OCP/SCP

High Power Density

Over Temperature Protection

Low Cost

Remote On/Off

Input Under Voltage Lockout

Output Voltage Trim

Fixed Frequency (330 kHz)

Positive/Negative Remote Sense

Active Low/High (Option)

Input Over Voltage Lockout

UL60950-1 Recognized (UL/cUL)

Basic Isolation
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
Input Voltage
36 V - 75 V
Max. Output
Current
12 A
Max. Output
Power
144 W
Typical
Efficiency
93.0%
Model Number
Active High
0RQB-C5T120
Model Number
Active Low
0RQB-C5T12L
5.0 V
36 V - 75 V
30 A
150 W
92.5%
0RQB-C5T050
0RQB-C5T05L
3.3 V
36 V - 75 V
46 A
152 W
91.0%
0RQB-C5T033
0RQB-C5T03L
2.5 V
36 V - 75 V
50 A
125 W
90.5%
0RQB-C5T025
0RQB-C5T02L
1.8 V
36 V - 75 V
50 A
90 W
88.0%
0RQB-C5TV80
0RQB-C5TV8L
1.5 V
36 V - 75 V
50 A
75 W
85.0%
0RQB-C5TV50
0RQB-C5TV5L
1.2 V
36 V - 75 V
50 A
60 W
83.0%
0RQB-C5TV20
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
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
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
Min
Typ
Max
Unit
Input Voltage (continuous)
-0.3
-
80
V
Remote On/Off
-0.3
-
18
V
-
-
2000
V
Ambient Temperature
-40
-
85
C
Storage Temperature
-55
-
125
C
Parameter
I/O Isolation Voltage
Notes
Note: All specifications are typical at nominal input, full load at 25 C unless noted.
Input Specifications
Parameter
Input Voltage
Min
Typ
Max
Unit
36
48
75
V
-
-
4.5
4.9
4.9
4.1
3.0
2.6
2.1
A
A
A
A
A
A
A
-
120
180
mA
10
15
mA
Notes
Input Current (full load)
VO=12 V
VO=5.0 V
VO=3.3 V
VO=2.5 V
VO=1.8 V
VO=1.5 V
VO=1.2 V
Input Current (no load)
Remote Off Input Current
Input Reflected Ripple Current
(pk-pk)
-
10
15
mA
Input Reflected Ripple Current
(rms)
-
1.5
3
mA
I t Inrush Current Transient
-
0.05
0.1
As
Turn-on Voltage Threshold
32
34
35
V
Turn-off Voltage Threshold
30
32
34
V
Input over voltage Lockout
76
78
80
V
2
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.
2
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
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
Output Specifications
Parameter
Min
Typ
Max
Unit
11.790
4.925
3.260
2.450
1.770
1.477
1.176
12.030
5.004
3.308
2.503
1.808
1.500
1.200
12.270
5.075
3.360
2.550
1.844
1.523
1.224
V
V
V
V
V
V
V
-3.5
-
3.5
%Vo,set
VO=12 V
VO=5.0 V
VO=1.2 V-3.3 V
-
8
5
3
15
15
6
mV
mV
mV
VO=5.0 V-12 V
VO=2.5 V-3.3 V
VO=1.2 V-1.8 V
Regulation Over Temperature
(-40 C to +85 C)
VO=12 V
VO=5.0 V
VO=3.3 V
VO=2.5 V
VO=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
VO=12 V
VO=5.0 V
VO=3.3 V
VO=1.2 V-2.5 V
-
10
5
2
20
10
5
mV
mV
mV
-
60
40
30
20
15
100
65
50
40
30
mV
mV
mV
mV
mV
0
0
0
0
-
12
30
46
50
A
A
A
A
14
35
50
55
15.5
40
60
60
18
45
65
65
A
A
A
A
-
3
5
As
-
25
20
20
15
30
25
20
20
mV
mV
mV
mV
-
70
60
50
45
40
55
40
90
80
70
60
60
70
60
mV
mV
mV
mV
mV
mV
mV
10
-
100
mS
-
0
5
%
Notes
Output Voltage Set Point
VO=12 V
VO=5.0 V
VO=3.3 V
VO=2.5 V
VO=1.8 V
VO=1.5 V
VO=1.2 V
Output Voltage Set Point
Line Regulation
Load Regulation
Short Circuit Surge Transient
Vin=48V, Io=50% load
Over all operating input voltage,
resistive load, and temperature
conditions.
2
Ripple and Noise (rms)
VO=12 V
VO=5.0 V
VO=3.3 V
VO=1.2 V-2.5 V
Ripple and Noise (pk-pk)
VO=12 V
VO=5.0 V
VO=3.3 V
VO=1.8 V
Vo=2.5 V
VO=1.5 V
VO=1.2 V
Turn on Time
Overshoot at Turn on
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
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
Output Specifications (continued)
Parameter
Output Capacitance
VO=12.0 V
VO=5.0 V
VO=1.2 V-3.3 V
Min
Typ
Max
Unit
0
0
0
-
2200
10000
20000
uF
uF
uF
-
600
800
mV
-
200
300
uS
-
600
800
mV
200
300
uS
Notes
Transient Response
50% ~ 75%
Max Load
Overshoot
Settling Time
Overshoot
VO=12.0 V
75% ~ 50%
Max Load
Settling Time
50% ~ 75%
Max Load
Overshoot
-
250
375
mV
Settling Time
-
100
200
uS
-
250
375
mV
Settling Time
-
100
200
uS
Overshoot
-
100
200
mV
Settling Time
-
200
300
uS
-
100
200
mV
Settling Time
-
200
300
uS
Overshoot
-
100
200
mV
Settling Time
-
300
400
uS
-
100
200
mV
Settling Time
-
300
400
uS
Overshoot
-
100
140
mV
Settling Time
-
200
300
uS
-
100
140
mV
Settling Time
-
200
300
uS
Overshoot
-
100
120
mV
-
200
300
uS
-
100
120
mV
-
200
300
uS
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
Overshoot
Overshoot
Overshoot
Settling Time
Overshoot
Settling Time
VO=5.0 V
VO=3.3 V
VO=2.5 V
Vo=1.8 V
VO=1.5 V
VO=1.2 V
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.
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
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
General Specifications
Parameter
Min
Typ
Max
Unit
Notes
90
89
88
87
85
82
80
93
92.5
91
90.5
88
85
83
-
%
%
%
%
%
%
%
Switching Frequency
280
330
380
kHz
Isolation capacitance
-
1500
-
pF
Input to Output Isolation Voltage
-
-
2000
V
Remote Sense Compesation
-
-
10
% Vo
80
-
110
% Vo
Over Temperature Protection
-
125
-
C
Over Voltage Protection
-
130
-
% Vo
Vin=48V, full load, Hiccup mode
1,109,917
Hours
Calculated Per Bell Core SR-332 (IO
=80% load, Vin=48 V, Vo=3.3 V; Ta =
25 C)
2.30 x 1.45 x 0.395
58.42 x 36.83 x 10.03
-
Efficiency
VO=12 V
VO=5.0 V
VO=3.3 V
VO=2.5 V
VO=1.8 V
VO=1.5 V
VO=1.2 V
Output Voltage Trim Range
MTBF
Vin=48V, full load
The total voltage increased by trim
and remote sense should not exceed
10%Vo.
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Weight
-
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
Typ
-
Max
0.8
Unit
V
2.4
-
18
V
-0.3
-
0.8
V
2.4
-
18
V
0
-
0.75
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
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
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
Output Trim Equations
Trim Resistor Calculate
Equations for calculating the trim resistor are shown below (Unit: kΩ). The Trim Down resistor should be
connected between the Trim pin and Ground pin. The Trim Up resistor should be connected between the Trim
pin and the Vout. Only one of the resistors should be used for any given application.
1) For Vo=1.5 V – 12 V:
Vout
511
Rtrimdown 
 10.22
delta
Module
Trim
GND
Rtrimup 
(100  delta ) Vo  5.11  626
 10.22
1.225  delta
Note:
delta 
Vo _ req  Vo
Vo
Rtrimdown
Vout
Module
 100%
Trim
Rtrimup
GND
Vo_req=Desired (trimmed) output voltage [V]; Vo=output voltage
Vo=12.006 V for 12 V output; Vo=5.000 V for 5 V output; Vo=3.308 V for 3.3 V output; Vo=2.505 V for 2.5 V
output; Vo=1.804 V for 1.8 V output; Vo=1.503 V for 1.5 V output
2) For Vo=1.2 V:
Rtrimdown 
511
 10.22
delta
Rtrimup 
(100  delta ) Vo  5.11  313
 10.22
0.6125  delta
Note:
delta 
Vo _ req  Vo
Vo
100%
Vo_req=Desired (trimmed) output voltage [V]; Vo=output voltage
Vo=1.202 V for 1.2 V output
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 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
Output Trim Equations (continued)
Trim Voltage Calculate
Equations for calculating the external trim voltage are shown below (Unit: V).
1) For Vo=1.5 V – 12 V:
Vout
Vtrim 
2.45
 Vo _ req  1.225 [V ]
Vo
Module
Trim
GND
Vtrim
Note:
Vo_req=Desired (trimmed) output voltage [V]; Vo=output voltage
Vo=12.006 V for 12 V output; Vo=5.000 V for 5 V output; Vo=3.308 V for 3.3 V output; Vo=2.505 V for 2.5 V
output; Vo=1.804 V for 1.8 V output; Vo=1.503 V for 1.5 V output
2) For Vo=1.2 V:
Vout
Vtrim
1.226
Vo_ req 0.614 V 
Vo
Module
Trim
GND
Vtrim
Note:
Vo_req=Desired (trimmed) output voltage [V]; Vo=output voltage
Vo=1.202 V for 1.2 V output
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 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
90.0%
90.0%
85.0%
85.0%
80.0%
80.0%
75.0%
36 V
48 V
75 V
70.0%
65.0%
EFFICIENCY
EFFICIENCY
Efficiency Data
75.0%
65.0%
60.0%
60.0%
55.0%
55.0%
50.0%
5.00
12.50
25.00
37.50
50.0%
5.00
50.00
36 V
48 V
75 V
70.0%
OUTPUT CURRENT(A)
12.50
50.00
0RQB-C5TV5x
95%
95%
90%
36 V
48 V
75 V
85%
80%
EFFICIENCY
90%
EFFICIENCY
37.50
OUTPUT CURRENT(A)
0RQB-C5TV2x
75%
36 V
48 V
75 V
85%
80%
75%
70%
70%
5
13
25
38
50
5
OUTPUT CURRENT (A)
13
25
38
50
OUTPUT CURRENT (A)
0RQB-C5TV8x
0RQB-C5T02x
95%
95%
90%
90%
36 V
48 V
75 V
85%
80%
75%
EFFICIENCY
EFFICIENCY
25.00
36 V
48 V
75 V
85%
80%
75%
70%
70%
5
11
23
34
OUTPUT CURRENT (A)
0RQB-C5T03x
46
3
8
15
23
30
OUTPUT CURRENT (A)
0RQB-C5T05x
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 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
Efficiency Data (continued)
95%
EFFICIENCY
90%
36 V
48 V
75 V
85%
80%
75%
70%
1
3
6
9
12
OUTPUT CURRENT (A)
0RQB-C5T12x
Thermal Derating Curves
Vin=48V, with maximum junction temperature of semiconductors derated to 120 degree C.
0RQB-C5Txxx
0RQB-C5T05x
0RQB-C5T12x
0RQB-C5T03x
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 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
Thermal Derating Curves (continued)
0RQB-C5T02x
0RQB-C5TV5x
0RQB-C5TV8x
0RQB-C5TV2x
Thermal Reference
Note: TH1, TH2, TH3 and TH4 are hot spots which should not exceed 115 degree 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 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
May 17, 2011
Ripple and Noise Waveforms
Ripple and noise at full load, 1.2 V/50 A output
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Ripple and noise at full load, 1.5 V/50 A output
Ripple and noise at full load, 1.8 V/50 A output
Ripple and noise at full load, 2.5 V/45 A output
Ripple and noise at full load, 3.3 V/46 A output
Ripple and noise at full load, 5.0 V/30 A output
Ripple and noise at full load, 12 V/12 A output
Note: Ripple and noise is tested with a 1 uF ceramic cap and a 10 uF tantalum capat 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
11
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
Transient Response Waveforms
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Vout= 1.2 V 50%-75% Load Transients
Vout= 1.2 V 75%-50% Load Transients
Vout= 1.5 V 50%-75% Load Transients
Vout= 1.5 V 75%-50% Load Transients
Vout= 1.8 V 50%-75% Load Transients
Vout= 1.8 V 75%-50% Load Transients
Vout= 2.5 V 50%-75% Load Transients
Vout= 2.5 V 75%-50% Load Transients
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com
12
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
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
Transient Response Waveforms (continued)
Vout= 3.3 V 50%-75% Load Transients
Vout= 3.3 V 75%-50% Load Transients
Vout= 5.0 V 50%-75% Load Transients
Vout= 5.0 V 75%-50% Load Transients
Vout= 12 V 50%-75% Load Transients
Vout= 12 V 75%-50% Load Transients
Note: Transient response at Vin=48 V, di/dt = 0.1 A/uS, with a 1 uF ceramic capacitor and a 10 uF Tantalum 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
13
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
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
Mechanical Outline
Pin Connections
Pin
1
2
3
4
5
6
7
8
Function
Vin (+)
Remote On/Off
Vin (-)
Vout (-)
Remote Sense (-)
Trim
Remote Sense (+)
Vout (+)
Pin Size
0.04"
0.04"
0.04"
0.062"
0.04"
0.04"
0.04"
0.062"
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
14
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
Bel Power Inc., a subsidiary of Bel Fuse Inc.
May 17, 2011
Revision History
Date
Revision
2011-05-17
C
Changes Detail
Approval
Add trim equation for external trim voltage.
JZ Wang
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
2011 Bel Fuse Inc. Specifications subject to change without notice. 051711
15
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