ISOLATED DC/DC CONVERTERS
48 Vdc Input, 1.2 Vdc - 12 Vdc / 15 A - 3 A Outputs, 1/16 Brick Converter
xRSB-30T Series
•
Isolated
RoHS Compliant
Rev.A
•
Input Under-Voltage Lockout
•
Output Over-Voltage Shutdown
•
OCP/SCP
•
Over Temperature Protection
•
Remote On/Off (Option)
•
Positive/Negative Remote Sense
•
Through Hole and SMT(Option)
•
Fixed Frequency (550 kHz)
•
High Efficiency
•
High Power Density
•
Low Cost
•
Output Voltage Trim
•
Basic Insulation
•
UL60950-1 Recognized (UL/cUL)
Description
The xRSB-30T 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 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 sixteenth brick package.
Part Selection
Output
Voltage
1.2 Vdc
1.5 Vdc
1.8 Vdc
2.5 Vdc
3.3 Vdc
5.0 Vdc
12 Vdc
Input Voltage
36 Vdc - 75 Vdc
36 Vdc - 75 Vdc
36 Vdc - 75 Vdc
36 Vdc - 75 Vdc
36 Vdc - 75 Vdc
36 Vdc - 75 Vdc
36 Vdc - 75 Vdc
Max. Output
Current
15 A
13 A
13 A
10 A
10 A
7A
3A
Max. Output
Power
18 W
19.5 W
23 W
25 W
30 W
35 W
36 W
Typical
Efficiency
84%
86%
86%
89%
90%
90%
89%
Model Number
Active Low
xRSB-30TV2L
xRSB-30TV5L
xRSB-30TV8L
xRSB-30T02L
xRSB-30T03L
xRSB-30T05L
xRSB-30T12L
Model Number
Active High
xRSB-30TV20
xRSB-30TV50
xRSB-30TV80
xRSB-30T025
xRSB-30T033
xRSB-30T050
xRSB-30T120
Notes:
1. Add “G” suffix at the end of the model number to indicate Tray Packaging. Replace”x” with “S” to
indicate SMT package, or “0” to indicate through hole package.
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)
Input Voltage Transient (100 ms)
Remote On/Off
I/O Isolation Voltage
Ambient Temperature
Storage Temperature
Min
-0.3 V
-0.3 V
-0.3 V
-
-40
°C
-55
°C
-
-
-
-
Typ
-
Max
80 V
100 V
18 V
1500 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 Vdc - 12 Vdc / 15 A - 3 A Outputs, 1/16 Brick Converter
Input Specifications
Parameter
Input Voltage
Input Current (full load)
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
2
Min
36 V
-
-
-
-
-
-
31 V
28 V
Typ
48 V
-
30 mA
2 mA
20 mA
3 mA
0.01 A s
33 V
32 V
2
Max
75 V
1.6 A
120 mA
6 mA
50 mA
7 mA
0.02 A s
35 V
35 V
2
Notes
Tested with simulated source
impedance of 15 uH, 5 Hz to 20
MHz; use a 100 uF/100 V
electrolytic capacitor with ESR=1
ohm max at 200 kHz at the input.
Note:
All specifications are typical at nominal input, full load at 25
°C
unless otherwise stated.
Output Specifications
Parameter
Output Voltage Set Point
Vo=1.2 V
Vo=1.5 V
Vo=1.8 V
Vo=2.5 V
Vo=3.3 V
Vo=5.0 V
Vo=12 V
Line Regulation
Vo=1.2 - 1.8 V
Vo=2.5 V
Vo=3.3 V
Vo=5.0 V
Vo=12 V
Load Regulation
Vo=1.2 - 2.5 V
Vo=3.3 - 5.0 V
Vo=12 V
Regulation Over Temperature
(-40
°C
to +85
°C)
Vo=1.2 - 1.8 V
Vo=2.5 - 3.3 V
Vo=5.0 V
Vo=12 V
Output Current
Vo=1.2 V
Vo=1.5 V
Vo=1.8 V
Vo=2.5 V
Vo=3.3 V
Vo=5.0 V
Vo=12 V
0A
0A
0A
0A
0A
0A
0A
-
-
-
-
-
-
-
15 A
13 A
13 A
10 A
10 A
7A
3A
-
-
-
-
-
-
-
-
Min
1.182 V
1.478 V
1.773 V
2.463 V
3.250 V
4.900 V
11.750 V
Typ
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
5.0 V
12.0 V
±0.5
mV
±2.0
mV
±3.0
mV
±4.0
mV
±6.0
mV
±3
mV
±4
mV
±5
mV
Max
1.218 V
1.523 V
1.827 V
2.538 V
3.350 V
5.100 V
12.250 V
±3
mV
±6
mV
±8
mV
±9
mV
±20
mV
±5
mV
±9
mV
±10
mV
Notes
Test conditions:
Vin=48 V; Io=50% load
-
-
-
-
-
±7
mV
±9
mV
±15
mV
±20
mV
±15
mV
±16
mV
±30
mV
±35
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 Vdc Input, 1.2 Vdc - 12 Vdc / 15 A - 3 A Outputs, 1/16 Brick Converter
Output Specifications (continued)
Parameter
Current Limit Threshold
Vo=1.2 V
Vo=1.5 V
Vo=1.8 V
Vo=2.5 V
Vo=3.3 V
Vo=5.0 V
Vo=12 V
Short Circuit Surge Transient
Ripple and Noise (rms)
Vo=1.2 - 2.5 V
Vo=3.3 V
Vo=5.0 - 12 V
Ripple and Noise (pk-pk)
Vo=1.2 - 2.5 V
Vo=3.3 V
Vo=5.0 V
Vo=12 V
Turn on Time
Overshoot at Turn on
Output Capacitance
Vo=1.2 - 1.5 V
Vo=1.8 V
Vo=2.5 V
Vo=3.3 V
Vo=5.0 V
Vo=12 V
Transient Response
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
-
-
-
-
-
-
220 uF
220 uF
220 uF
0 uF
0 uF
0 uF
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
40 mV
65 mV
90 mV
80 mV
35 mS
0%
-
-
-
-
-
-
100 mV
100 uS
100 mV
100 uS
150 mV
120 uS
150 mV
120 uS
200 mV
100 uS
200 mV
100 uS
200 mV
200 uS
200 mV
200 uS
350 mV
200 uS
350 mV
200 uS
270 mV
110 uS
270 mV
110 uS
70 mV
110 mV
150 mV
140 mV
70 mS
5%
15000 uF
10000 uF
6800 uF
4700 uF
2200 uF
330 uF
150 mV
150 uS
150 mV
150 uS
200 mV
200 uS
200 mV
200 uS
300 mV
150 uS
300 mV
150 uS
350 mV
350 uS
350 mV
350 uS
500 mV
350 uS
500 mV
350 uS
450 mV
200 uS
450 mV
200 uS
-
-
-
10 mV
15 mV
30 mV
20 mV
30 mV
55 mV
Tested at 0-20 MHz
BW, with a 1 uF
ceramic capacitor and
a 10 uF Tantalum
capacitor at the
output.
Min
18 A
14 A
14 A
11 A
10.5 A
7.5 A
3.5 A
-
Typ
24 A
20 A
19 A
16 A
15.5 A
9.5 A
4.5 A
2
0.5 A s
Max
30 A
26 A
24 A
21 A
25 A
14 A
6A
2
1A s
Notes
Vo=1.2 V
Vo=1.5 - 1.8 V
Vo=2.5 V
Vo=3.3 V
Test conditions: di/dt
= 0.1 A/uS, Vin=48 V,
with a 1uF ceramic
capacitor and a 10 uF
Tantalum capacitor at
the output.
Vo=5.0 V
Vo=12 V
Note:
All specifications are typical at nominal input, full load 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
ISOLATED DC/DC CONVERTERS
48 Vdc Input, 1.2 Vdc - 12 Vdc / 15 A - 3 A Outputs, 1/16 Brick Converter
General Specifications
Parameter
Efficiency
Vo=1.2 V
Vo=1.5 V
Vo=1.8 V
Vo=2.5 V
Vo=3.3 - 5.0 V
Vo=12 V
Switching Frequency
Isolation Capacitance
Output Voltage Trim Range
Over Temperature Protection
Over Voltage Protection
MTBF
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
-
1.3 x 0.9 x 0.364
33.02 x 22.86 x 9.24
1.3 x 0.9 x 0.378
33.02 x 22.86 x 9.60
13 g
-
SMT Package
Min
81%
83%
83%
84%
87%
86%
500 kHz
-
90% Vo
120
°C
-
Typ
84%
86%
86%
87%
90%
89%
550 kHz
3900 pF
-
-
130% Vo
TBD
Max
-
-
-
-
-
-
600 kHz
-
110% Vo
140
°C
160% Vo
Test conditions: Vin=48 V, full load and
short the feedback optocoupler.
Calculated Per Bell Core SR-332 (I
O
=
Nominal; T
a
= 25
°C)
Notes
Vin=48 V, full load
Through Hole Package
Note:
All specifications are typical at 25
°C
unless otherwise stated.
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 High
Active Low
-0.3 V
2.95 V
-0.3 V
2.95 V
0 mA
-
-
-
-
-
0.8 V
18 V
0.8 V
18 V
1 mA
When Remote On/Off pin is
open, for active low option, unit
is off; for active high option, unit
is on
Min
Typ
Max
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 Vdc - 12 Vdc / 15 A - 3 A Outputs, 1/16 Brick Converter
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) Trim Equations for Vo=1.2 V
Vout
R
trimdown
=
511
−
10.22
delta
Module
Trim
GND
Rtrimdown
R
trimup
=
Note:
(100
+
delta
)
⋅
Vo
⋅
5.11
−
313
−
10.22
0.6125
⋅
delta
Vout
delta
(
Vo
_
req
−
Vo
)
×
100
[
%
]
=
Vo
Module
Trim
GND
Rtrimup
Vo_req=Desired (trimmed) output voltage [V] Vo=1.202 V
2) Trim Equations for Vo=1.5 V - 12 V
R
trimdown
=
511
−
10.22
delta
R
trimup
=
Note:
(100
+
delta
)
⋅
Vo
⋅
511
−
626
−
10.22
1.225
⋅
delta
delta
=
(
Vo
_
req
−
Vo
)
×
100
[
%
]
Vo
Vo_req=Desired (trimmed) output voltage [V]
Vo=1.503 V for 1.5 V output; Vo=1.804 V for 1.8 V output; Vo=2.505 V for 2.5 V output; Vo=3.308 V for 3.3 V
output; Vo=5.002 V for 5 V output; Vo=12.007 V for 12 V output.
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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