ISOLATED DC/DC CONVERTERS
48 V Input 12 V/8.3 A, 5 V/20 A, 3.3 V/25 A, 1.2-2.5 V/30 A Outputs
0RQB-C0U Series
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•
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Isolated
High Efficiency
High Power Density
Low Cost
Input Under Voltage Lockout
Fixed Frequency (285 kHz)
Active Low/High (Option)
Input Over Voltage Lockout
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•
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RoHS Compliant
Output Over Voltage Shutdown
OCP/SCP
Over Temperature Protection
Remote On/Off
Output Voltage Trim
Positive/Negative Remote Sense
Basic Isolation
Description
The 0RQB-C0U Series are isolated dc/dc converters that operate from a nominal 48 V source. These units will
provide up to 100 W of output power from a nominal 48 V input. These units are designed to be highly efficient
and low cost. Typical efficiency of 12 V output at 48 V input at full load is 91%. 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
18 V - 75 V
18 V - 75 V
18 V - 75 V
18 V - 75 V
18 V - 75 V
18 V - 75 V
18 V - 75 V
Max. Output
Current
8.3 A
20 A
25 A
30 A
30 A
30 A
30 A
Max. Output
Power
100 W
100 W
82.5 W
75 W
54 W
45 W
36 W
Typical
Efficiency
91%
90%
90%
89.5%
85%
83%
80%
Model Number
Active High
0RQB-C0U120
0RQB-C0U050
0RQB-C0U033
0RQB-C0U025
0RQB-C0UV80
0RQB-C0UV50
0RQB-C0UV20
Model Number
Active Low
0RQB-C0U12L
0RQB-C0U05L
0RQB-C0U03L
0RQB-C0U02L
0RQB-C0UV8L
0RQB-C0UV5L
0RQB-C0UV2L
Note:
Add “G” suffix at the end of the model number to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Remote On/Off
I/O Isolation Voltage
Ambient Temperature
Storage Temperature
Min
-0.3 V
-0.3 V
-
-40
°C
-55
°C
Typ
-
-
-
-
-
Max
80 V
18 V
2000 V
85
°C
125
°C
Notes
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
ISOLATED DC/DC CONVERTERS
48 V Input 12 V/8.3 A, 5 V/20 A, 3.3 V/25 A, 1.2-2.5 V/30 A Outputs
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
18 V
-
-
-
-
-
-
-
-
Typ
48 V
-
-
-
-
-
-
-
100 mA
10 mA
Max
75 V
7.0 A
7.0 A
6.0 A
5.5 A
4.0 A
3.5 A
3.0 A
180 mA
15 mA
20 mA
5 mA
0.1 A s
17.5 V
16.5 V
80 V
2
Notes
-
-
-
16.5 V
15.5 V
76 V
10 mA
2 mA
0.05 A s
17.0 V
16.0 V
78 V
2
Tested with simulated source impedance
of 10 uH, 5 Hz to 20 MHz BW; use a 100
uF /100 V electrolytic capacitor with ESR
= 1 ohm max. at 200 kHz at 25
°C.
Output Specifications
Parameter
Output Voltage Set Point
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
Line Regulation
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.2 V-1.8 V
Load Regulation
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V -2.5 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
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Min
11.820 V
4.925 V
3.251 V
2.455 V
1.773 V
1.448 V
1.182 V
Typ
12.00 V
5.00 V
3.30 V
2.50 V
1.80 V
1.50 V
1.20 V
±24
mV
±5
mV
±4
mV
±4
mV
±3
mV
±30
mV
±10mV
±8
mV
±5
mV
Max
12.180 V
5.075 V
3.360 V
2.545 V
1.827 V
1.523 V
1.218 V
±48
mV
±15
mV
±15
mV
±10
mV
±6
mV
±60
mV
±20
mV
±15
mV
±10
mV
Notes
Vin=48 V, Io=50% full
load
±60
mV
±40
mV
±30
mV
±20
mV
±15
mV
±100
mV
±65
mV
±50
mV
±50
mV
±30
mV
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
48 V Input 12 V/8.3 A, 5 V/20 A, 3.3 V/25 A, 1.2-2.5 V/30 A Outputs
Output Specifications (continued)
Parameter
Output Current Range
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=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
=2.5 V
V
O
=1.2 V -1.8 V
Short Circuit Surge Transient
Vin=48 V ; Ripple and Noise (rms)
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V -2.5 V
V
O
=1.2 V -1.8 V
Vin=24 V ; 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
Vin=48 V ; Ripple and Noise (pk-pk)
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V-2.5 V
V
O
=1.2 V-1.8 V
Vin=24 V ; Ripple and Noise (pk-pk)
V
O
=12 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.2 V-1.8 V
Turn on Time
Overshoot at Turn on
Output Capacitance
V
O
=12.0 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=1.2 V-2.5 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
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
-
-
-
-
-
-
-
-
-
-
-
-
300 mV
150 uS
300 mV
150 uS
150 mV
100 uS
150 mV
100 uS
150 mV
100 uS
150 mV
100 uS
480 mV
200 uS
480mV
150 uS
200 mV
150 uS
200 mV
150 uS
200 mV
100 uS
200 mV
100 uS
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
10 mS
-
0 uF
0 uF
0 uF
0 uF
30 mV
25 mV
20 mV
15 mV
25 mV
20 mV
15 mV
10 mV
100 mV
75 mV
50 mV
40 mV
75 mV
50 mV
35 mV
30mV
25 mV
-
0%
-
-
-
-
50 mV
40 mV
40 mV
30 mV
40 mV
30 mV
25 mV
20 mV
150 mV
120 mV
100 mV
80 mV
120 mV
100 mV
70 mV
60 mV
50 mV
100 mS
5%
1200 uF
6800 uF
15000 uF
20000 uF
9.6 A
-
27 A
35 A
-
-
10.5 A
24 A
32 A
40 A
36 A
3A s
2
Min
0A
0A
0A
0A
Typ
-
-
-
-
Max
8.3 A
20 A
25 A
30 A
12 A
-
35 A
45 A
-
5A s
2
Notes
Test conditions:
0-20 MHz BW, with a
1 uF ceramic capacitor
and a 10 uF Tantalum
capacitor at the output.
V
O
=12.0 V
V
O
=5.0 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.
V
O
=3.3 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
48 V Input 12 V/8.3 A, 5 V/20 A, 3.3 V/25 A, 1.2-2.5 V/30 A Outputs
Output Specifications (continued)
Parameter
Transient Response
Overshoot
50% ~ 75%
Max Load
Settling Time
Overshoot
75% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 75%
Max Load
Settling Time
Overshoot
75% ~ 50%
Max Load
Settling Time
Min
-
-
-
-
-
-
-
-
Typ
150 mV
85 uS
150 mV
85 uS
50 mV
100 uS
50 mV
100 uS
Max
200 mV
100 uS
200 mV
100 uS
80 mV
150 uS
80 mV
150 uS
Notes
V
O
=2.5 V,
V
O
=1.2 V-1.8 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.
General Specifications
Parameter
Efficiency
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
Efficiency
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
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
millimeters
Weight
-
2.30 x 1.45 x 0.395
58.42 x 36.83 x 10.03
40 g
-
88%
-
89%
-
-
-
-
240 kHz
-
-
-
80% Vo
-
-
91%
91%
91%
90%
85%
83%
80%
285 kHz
1500 pF
-
-
-
125
°C
130% Vo
TBD
-
-
-
-
-
-
-
320 kHz
-
2000 V
10% Vo
110% Vo
-
-
Vin=48V, full load, Hiccup mode
Calculated Per Bell Core SR-332 (I
O
=
Nominal; T
a
= 25
°C)
The total voltage increased by trim and
remote sense should not exceed
10%Vo.
88%
-
88%
88%
-
-
-
90%
90%
90%
89.5%
85%
83%
80%
-
-
-
-
-
-
-
Min
Typ
Max
Notes
Vin=48 V, full load , Ta=25
°C
Vin=24 V, full load , Ta=25
°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 CONVERTERS
48 V Input 12 V/8.3 A, 5 V/20 A, 3.3 V/25 A, 1.2-2.5 V/30 A Outputs
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit On)
Signal High (Unit Off)
Signal Low (Unit Off)
Signal High (Unit On)
Current Sink
Active Low
-0.3 V
2.4 V
-0.3 V
2.4 V
0 mA
-
-
-
-
-
0.8 V
18 V
0.8 V
18 V
0.75 mA
0RQB-C0UxxL. The remote
on/off pin open, Unit off.
0RQB-C0Uxx0. The remote
on/off pin open, Unit on.
Min
Typ
Max
Notes
Active High
Output Trim Equations
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
Module
Trim
GND
Rtrimdown
511
Rtrimdown
=
−
10.22
delta
Rtrimup
=
(100
+
delta
)
⋅
Vo
⋅
5.11
−
626
−
10.22
1.225
⋅
delta
Vout
Module
Trim
GND
Rtrimup
2) For Vo=1.2 V:
Rtrimdown
=
511
−
10.22
delta
Rtrimup
=
(100
+
delta
)
⋅
Vo
⋅
5.11
−
313
−
10.22
0.6125
⋅
delta
Notes:
(
Vo
_
req
−
Vo
)
×
100
[
%
]
delta
=
Vo
Vo_req=Desired (trimmed) output voltage [V]; Vo=output voltage
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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