ISOLATED DC/DC CONVERTERS
48 Vdc Input 1.2-2.5 Vdc/80 A, 3.3 Vdc/70 A, 5 Vdc/48 A, 12 Vdc/20 A Output
0RHB-D0T Series
•
•
•
•
•
•
•
•
Isolated
High Efficiency
High Power Density
Low Cost
Input Under Voltage Lockout
Fixed frequency (330 kHz)
Basic Isolation
Input Over Voltage Lockout
RoHS Compliant
•
•
•
•
•
•
•
•
OCP/SCP
Rev.A
Output Over Voltage Shutdown
Over Temperature Protection
Remote On/Off
Output Voltage Trim
Positive/Negative Remote Sense
Remote On/Off Logic (option)
UL60950-1 Recognized (UL/cUL)
Description
The 0RHB-D0T Series are isolated dc/dc converters that operate from a nominal 48 Vdc source. These units
provide up to 200 W of output power from a nominal 48 Vdc input. These units are designed to be highly efficient
and low cost. Features include remote on/off, over current protection and under voltage lockout. These
converters are provided in an industry standard half-brick package.
Part Selection
Output
Voltage
12.0 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
20 A
48 A
70 A
80 A
80 A
80 A
80 A
Max. Output
Power
240 W
240 W
231 W
200 W
144 W
120 W
96 W
Typical
Efficiency
94%
92.5%
92%
91%
89%
87%
85%
Model Number
Active High
0RHB-D0T120
0RHB-D0T050
0RHB-D0T033
0RHB-D0T025
0RHB-D0TV80
0RHB-D0TV50
0RHB-D0TV20
Model Number
Active Low
0RHB-D0T12L
0RHB-D0T05L
0RHB-D0T03L
0RHB-D0T02L
0RHB-D0TV8L
0RHB-D0TV5L
0RHB-D0TV2L
Notes:
1. Add “G” suffix at the end of the model number to indicate Tray Packaging.
2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
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
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 Vdc Input 1.2-2.5 Vdc/80 A, 3.3 Vdc/70 A, 5 Vdc/48 A, 12 Vdc/20 A Output
Input Specifications
Parameter
Input Voltage
Input Current (full load)
Vo=12.0 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)
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 V
-
-
-
-
-
-
-
-
-
-
-
32 V
30 V
76 V
Typ
48 V
-
-
-
-
-
-
-
120 mA
5 mA
20 mA
5 mA
0.05 A s
34 V
32 V
78 V
2
Max
75 V
7.5 A
7.5 A
7.3 A
6.4 A
4.7 A
4.0 A
3.3 A
180 mA
10 mA
40 mA
10 mA
0.1 A s
35 V
34 V
80 V
2
Notes
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.
Output Specifications
Parameter
Output Voltage Set Point
V
O
=12.0 V
V
O
=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Line Regulation
V
O
=12.0 V
V
O
=5.0 V
V
O
=3.3 V
Vo=1.2 V - 2.5 V
Load Regulation
V
O
=12.0 V
V
O
=5.0 V
V
O
=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Regulation Over Temperature (-40
°C
to +85
°C)
V
O
=12.0 V
V
O
=5.0 V
V
O
=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Min
11.760 V
4.925 V
3.250 V
2.462 V
1.773 V
1.477 V
1.176 V
Typ
12.000 V
5.000 V
3.300 V
2.500 V
1.800 V
1.500 V
1.200 V
±12
mV
±5
mV
±3
mV
±3
mV
±30
mV
±10
mV
±7
mV
±6
mV
±5
mV
±4
mV
±3
mV
±60
mV
±45
mV
±30
mV
±25
mV
±20
mV
±20
mV
±15
mV
Max
12.240 V
5.075 V
3.350 V
2.538 V
1.827 V
1.523 V
1.224 V
±24
mV
±10
mV
±7
mV
±6
mV
±60
mV
±20
mV
±15
mV
±13
mV
±9
mV
±8
mV
±6
mV
±100
mV
±75
mV
±50
mV
±45
mV
±40
mV
±35
mV
±30
mV
Notes
Vin=48 V, Io=50% 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 Vdc Input 1.2-2.5 Vdc/80 A, 3.3 Vdc/70 A, 5 Vdc/48 A, 12 Vdc/20 A Output
Output Specifications (continued)
Parameter
Output Current
V
O
=12.0 V
V
O
=5.0 V
Vo=3.3 V
Vo=1.2 V - 2.5 V
Current Limit Threshold
V
O
=12.0 V
V
O
=5.0 V
Vo=3.3 V
Vo=1.2 V - 2.5 V
Short Circuit Surge Transient
Ripple and Noise (rms)
V
O
=12.0 V
V
O
=5.0 V
Vo=3.3 V
Vo=1.2 V - 2.5 V
Ripple and Noise (pk-pk)
V
O
=12.0 V
V
O
=5.0 V
Vo=3.3 V
Vo=1.2 V - 2.5 V
Turn on Time
V
O
=5.0 V - 12.0 V
Vo=3.3 V
Vo=1.2 V - 2.5 V
Overshoot at Turn on
Output Capacitance
V
O
=12.0 V
V
O
=5.0 V
Vo=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
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
V
O
=1.2 V - 2.5 V
V
O
=3.3 V
V
O
=5.0 V
V
O
=12.0 V
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
600 mV
300 uS
600 mV
300 uS
250 mV
250 uS
250 mV
250 uS
150 mV
200 uS
150 mV
200 uS
100 mV
200 uS
100 mV
200 uS
800 mV
500 uS
800 mV
500 uS
400 mV
400 uS
400 mV
400 uS
200 mV
300 uS
200 mV
300 uS
200 mV
300 uS
200 mV
300 uS
Test conditions: di/dt =
0.1 A/uS, Vin=48 V,
Ta=25
°C
with a 1 uF
ceramic capacitor and
a 10 uF Tantalum
capacitor at the output.
10 mS
8 mS
5 mS
-
0 uF
0 uF
0 uF
-
-
-
0%
-
-
-
30 mS
20 mS
15 mS
5%
2200 uF
10000 uF
20000 uF
-
-
-
-
100 mV
80 mV
55 mV
40 mV
150 mV
150 mV
100 mV
80 mV
-
-
-
-
30 mV
25 mV
20 mV
15 mV
50 mV
50 mV
40 mV
30 mV
Test conditions:
0-20 MHz BW, with a
1 uF ceramic capacitor
and a 10 uF Tantalum
capacitor at the output.
21 A
50 A
74 A
86 A
-
25 A
58 A
84 A
96 A
2
3A s
30 A
66 A
94 A
106 A
2
5A s
Hiccup Mode
0A
0A
0A
0A
-
-
-
-
20 A
48 A
70 A
80 A
Min
Typ
Max
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 Vdc Input 1.2-2.5 Vdc/80 A, 3.3 Vdc/70 A, 5 Vdc/48 A, 12 Vdc/20 A Output
General Specifications
Parameter
Efficiency
V
O
=12.0 V
V
O
=5.0 V
V
O
=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Switching Frequency
Isolation capacitance
Remote Sense Compesation
Output Voltage Trim Range
Over Temperature Protection
Over Voltage Protection
MTBF
Dimensions
Inches
millimeters
Weight
-
2.28 x 2.4 x 0.42
57.51 x 60.98 x 10.67
76 g
-
91%
89%
89%
88%
86%
84%
82%
280 kHz
-
-
80% Vo
-
-
94%
92.5%
92%
91%
89%
87%
85%
330 kHz
1500 pF
-
-
125
°C
130% Vo
1,113,071 hours
-
-
-
-
-
-
-
380 kHz
-
10% Vo
110% Vo
-
-
Vin=48V, full load, Hiccup mode
Calculated Per Bell Core SR-332
(Vin=48 V; Vo=2.5 V, I
O
= 80%Iomax;
T
a
= 25
°C)
The total voltage increased by trim and
remote sense should not exceed
10%Vo.
Min
Typ
Max
Notes
Vin=48 V, full load , Ta=25
°C
Note:
All specifications are typical at nominal input, full load at 25
°C
unless noted.
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
0RHB-D0TxxL. The remote
on/off pin open, Unit off.
0RHB-D0Txx0. The remote
on/off pin open, Unit on.
Min
Typ
Max
Notes
Active High
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 Vdc Input 1.2-2.5 Vdc/80 A, 3.3 Vdc/70 A, 5 Vdc/48 A, 12 Vdc/20 A Output
Output Trim Equations
Equations for calculating the trim resistor (in kΩ) are shown below. 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.
Rtrimdown
=
1.5 V-12 V:
100
−
2
delta
Module
Vout
Trim
GND
Vout
Module
Trim
GND
Rtrimup
(100
+
delta
)
⋅
Vo
−
122.5
Rtrimup
=
−
2
1.225
⋅
delta
1.2 V:
Rtrimdown
Rtrimup
=
Notes:
(100
+
delta
)
⋅
Vo
−
61.25
−
2
0.6125
⋅
delta
(
Vo
_
req
−
Vo
)
×
100
[
%
]
delta
=
Vo
Vo_req=Desired(trimmed) output voltage[V]
Output voltage Vo=3.308 V for 3.3 V output; Vo=5.000 V for 5.0 V; Vo=12.000 V for 12 V output
Efficiency Data
Efficiency Curve
94%
Efficiency
Efficiency
94%
Efficiency Curve
91%
88%
85%
82%
79%
3
5
8
10
13
15
18
20
Output Current (A)
36 V
48 V
75 V
91%
88%
85%
82%
79%
76%
5
10 15 20 25 30 35 40 45 48
Output Current (A)
36 V
48 V
75 V
0RHB-D0T12x
Efficiency Curve
94%
91%
Efficiency
88%
85%
82%
79%
76%
10
20
30
40
50
Output Current (A)
60
70
36 V
48 V
75 V
94%
91%
Efficiency
88%
85%
82%
79%
76%
73%
10
20
0RHB-D0T05x
Efficiency Curve
36 V
48 V
75 V
30
40
50
60
70
80
Output Current (A)
0RHB-D0T03x
0RHB-D0T02x
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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