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0RSB-40U050G

型号：

0RSB-40U050G

品牌：

BEL[ BEL FUSE INC. ]

页数：

21 页

PDF大小：

566 K

下载PDF手册
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
xRSB-40U Series  
Features  
RoHS Compliant  
Rev.C  
Input Under Voltage Lockout  
Output Over Voltage Shutdown  
OCP/SCP  
Isolated  
Fixed Frequency  
High Efficiency  
High Power Density  
Low Cost  
Over Temperature Protection  
Wide Input Voltage  
Output Voltage Trim  
Basic Insulation  
Remote On/Off Logic (Option)  
Positive/Negative Remote Sense  
Through Hole and SMT(Option)  
Input Over Voltage Protection  
Class 1, Category 2, Isolated DC/DC Converter (refer to IPC-9592)  
UL60950-1 Recognized (UL/cUL) (Pending)  
Applications  
Networking  
Computers and peripherals  
Telecommunications  
Description  
The xRSB-40U series are isolated dc/dc converters that operate from a nominal 24 Vdc or 48 Vdc source. These  
units will provide up to 40 W of output power from an 18 Vdc - 75 Vdc wide input range. 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  
Input Voltage  
Max. Output  
Current  
Max. Output  
Power  
Typical  
Efficiency  
Model Number  
Active Low  
Model Number  
Active High  
Voltage  
1.2 Vdc  
1.5 Vdc  
1.8 Vdc  
2.5 Vdc  
3.3 Vdc  
5.0 Vdc  
12 Vdc  
18 Vdc - 75 Vdc  
18 Vdc - 75 Vdc  
18 Vdc - 75 Vdc  
18 Vdc - 75 Vdc  
18 Vdc - 75 Vdc  
18 Vdc - 75 Vdc  
18 Vdc - 75 Vdc  
18 A  
16 A  
14 A  
12 A  
10 A  
8 A  
22 W  
24 W  
25 W  
30 W  
33 W  
40 W  
42 W  
82%  
84%  
85%  
86%  
87.5%  
87%  
85%  
xRSB-40UV2L  
xRSB-40UV5L  
xRSB-40UV8L  
xRSB-40U02L  
xRSB-40U03L  
xRSB-40U05L  
xRSB-40U12L  
xRSB-40UV20  
xRSB-40UV50  
xRSB-40UV80  
xRSB-40U025  
xRSB-40U033  
xRSB-40U050  
xRSB-40U120  
3.5 A  
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  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Part Number Explanation  
x R SB – 40 U xx x  
1
2
3
4
5
6 7  
1---Replace”x” with “S” to indicate SMT package, or “0” to indicate through hole package  
2---RoHS 6, change “R” to “7” means RoHS 5  
3---Series name, 1/16 Brick  
4---Series code  
5---Input range (18-75V)  
6---Output voltage, V2=1.2Vout, V5=1.5Vout, V8=1.8Vout, 02=2.5Vout, 03=3.3Vout, 05=5.0Vout, 12=12Vout  
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  
Unit  
Parameter  
Input Voltage (continuous)  
Input Transient Voltage  
Remote On/Off  
Min  
-0.3  
-
Typ  
Max  
80  
Notes  
-
-
-
-
-
-
V
V
100  
18  
100mS maximum  
-0.3  
-
V
I/O Isolation Voltage  
Ambient Temperature  
Storage Temperature  
1500  
85  
V
-40  
-55  
C  
C  
125  
Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may  
permanently damage the device.  
Input Specifications  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Input Voltage  
Input Current (full load)  
Vo=1.2 V - 1.8 V  
18  
48  
75  
V
-
-
-
-
-
-
2.5  
3.0  
3.5  
A
A
A
Vo=2.5 V - 3.3 V  
Vo=5.0 V - 12 V  
Input Current (no load)  
-
-
60  
1
120  
3
mA  
mA  
Remote Off Input Current  
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.  
Input Reflected Ripple Current  
(pk-pk)  
-
-
20  
3
50  
7
mA  
mA  
Input Reflected Ripple Current  
(rms)  
Input Over Voltage Lockout  
I2t Inrush Current Transient  
Turn-on Voltage Threshold  
Turn-off Voltage Threshold  
78  
-
-
82  
V
A2s  
V
0.01  
17.2  
16.8  
0.02  
17.8  
17.4  
16.6  
16.2  
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  
2
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Output Specifications  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
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  
1.182  
1.478  
1.773  
2.463  
3.250  
4.925  
11.750  
1.2  
1.5  
1.8  
2.5  
3.3  
5.0  
12  
1.218  
1.523  
1.827  
2.538  
3.350  
5.075  
12.250  
V
V
V
V
V
V
V
Test conditions:  
Vin=48 V; Io=50% load  
Line Regulation  
Load Regulation  
0.5  
1.0  
3.0  
4.0  
6.0  
3  
4  
8  
9  
15  
Vo=1.2 V - 1.8 V  
Vo=2.5 V  
-
-
-
-
-
mV  
mV  
mV  
mV  
mV  
Vo=3.3 V  
Vo=5.0 V  
Vo=12 V  
3  
4  
9  
5  
9  
18  
Vo=1.2 - 2.5 V  
Vo=3.3 - 5.0 V  
Vo=12 V  
-
-
-
mV  
mV  
mV  
Regulation Over Temperature(-40 C to +85 C)  
4  
6  
9  
15  
20  
9  
-
-
-
-
-
mV  
mV  
mV  
mV  
mV  
Vo=1.2 V  
Vo=1.5 - 1.8 V  
Vo=2.5 - 3.3 V  
Vo=5.0 V  
14  
16  
30  
35  
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  
-
-
-
-
-
-
-
0
0
0
0
0
0
0
18  
16  
14  
12  
10  
8
A
A
A
A
A
A
A
3.5  
Short Circuit Surge Transient  
-
0.5  
1
A2s Hiccup mode, auto recovery  
Current Limit Threshold  
Vo=1.2 V  
21  
19  
17  
14  
11  
8.8  
3.7  
25  
22  
20  
17  
14  
10  
5
33  
26  
23  
20  
16  
12.5  
6
A
A
A
A
A
A
A
Vo=1.5 V  
Vo=1.8 V  
Vo=2.5 V  
Vo=3.3 V  
Vo=5.0 V  
Vo=12 V  
Ripple and Noise (rms)  
Vo=1.2 V - 1.8 V  
Vo=2.5 V  
-
-
-
-
-
6
12  
20  
25  
50  
55  
mV  
mV  
mV  
10  
12  
25  
30  
Vo=3.3 V  
Vo=5.0 V  
Vo=12 V  
Tested at 0-20 MHz BW,  
mV  
with a 1 uF ceramic  
mV  
capacitor and a 10 uF  
Ripple and Noise (pk-pk)  
Vo=1.2 V - 1.8 V  
Vo=2.5 V  
Tantalum capacitor at the  
output.  
-
-
-
-
-
40  
45  
55  
70  
90  
70  
80  
90  
120  
180  
mV  
mV  
mV  
mV  
mV  
Vo=3.3 V  
Vo=5.0 V  
Vo=12 V  
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  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Output Specifications (continued)  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Turn on Time  
-
25  
50  
mS  
Overshoot at Turn on  
Output Capacitance  
-
0
5
%
Vo=1.2 V  
470  
470  
470  
470  
330  
150  
10  
-
-
-
-
-
-
-
15000  
10000  
10000  
5600  
4700  
2200  
220  
uF  
uF  
uF  
uF  
uF  
uF  
uF  
Vo=1.5 V  
Vo=1.8 V  
Vo=2.5 V  
Vo=3.3 V  
Vo=5.0 V  
Vo=12 V  
Recommend to use AVX  
TPS series Tantalum  
capacitor as min capacitor.  
Transient Response  
Overshoot  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
60  
80  
110  
150  
110  
150  
180  
150  
180  
150  
250  
150  
250  
150  
350  
200  
350  
200  
650  
300  
650  
300  
mV  
uS  
25% ~ 50%  
Max Load  
Settling Time  
Overshoot  
Vo=1.2 V  
60  
mV  
uS  
50% ~ 25%  
Max Load  
Settling Time  
Overshoot  
80  
90  
mV  
uS  
25% ~ 50%  
Max Load  
Settling Time  
Overshoot  
80  
Vo=1.5 -1.8 V  
Vo=2.5 -3.3 V  
Vo=5.0 V  
90  
mV  
uS  
50% ~ 25%  
Max Load  
Settling Time  
Overshoot  
80  
Test conditions: di/dt = 0.1  
A/uS, Vin=48 V, with a 1  
uF ceramic capacioor and  
a Min Capacitance of  
Tantalum capacitor at the  
output.  
180  
80  
mV  
uS  
25% ~ 50%  
Max Load  
Settling Time  
Overshoot  
180  
80  
mV  
uS  
50% ~ 25%  
Max Load  
Settling Time  
Overshoot  
250  
100  
250  
100  
400  
150  
400  
150  
mV  
uS  
25% ~ 50%  
Max Load  
Settling Time  
Overshoot  
mV  
uS  
50% ~ 25%  
Max Load  
Settling Time  
Overshoot  
mV  
mS  
mV  
mS  
25% ~ 50%  
Max Load  
Settling Time  
Overshoot  
Vo=12 V  
50% ~ 25%  
Max Load  
Settling Time  
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  
4
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
General Specifications  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Efficiency  
Vo=1.2 V  
78  
79  
81  
83  
85  
85  
83  
82  
84  
85  
86  
87.5  
87  
-
-
-
-
-
-
-
%
%
%
%
%
%
%
Vo=1.5 V  
Vo=1.8 V  
Vo=2.5 V  
Vo=3.3 V  
Vo=5.0 V  
Vo=12 V  
Vin=48 V, full load  
85  
Switching Frequency  
Vo=1.2 V -12 V  
Vo=1.8 V  
450  
500  
500  
550  
550  
600  
KHz  
KHz  
Isolation Capacitance  
-
3900  
-
pF  
The OTP threshold is set at 125C in  
non-latch mode, and the module will  
restart automatically when  
Over Temperature Protection  
-
125  
-
C  
temperature falls down to 115C.  
Output Voltage Trim Range  
Over Voltage Protection  
90  
-
-
110  
160  
% Vo  
% Vo  
Test conditions: Vin=48 V, full load  
and short the feedback optocoupler.  
130  
Calculated Per Bell Core SR-332 (IO  
= Nominal; Ta = 25 C)  
MTBF  
TBD  
-
-
1.30 x 0.90 x 0.493  
33.02 x 22.86 x 12.53  
SRSB-40Uxxx  
0RSB-40Uxxx  
Dimensions  
Inches (L × W × H)  
Millimeters (L × W × H)  
1.30 x 0.90 x 0.507  
33.02 x 22.86 x 12.89  
-
Weight  
-
14  
-
g
Note: All specifications are typical at 25 C unless otherwise stated.  
Control Specifications  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Remote On/Off  
Signal Low (Unit On)  
Signal High (Unit Off)  
Signal Low (Unit Off)  
Signal High (Unit On)  
Current Sink  
-0.3  
2.4  
-0.3  
2.4  
0
-
-
-
-
-
0.8  
18  
0.8  
18  
1
V
V
When Remote On/Off pin is  
open, for active low option,  
unit is off; for active high  
option, unit is on  
Active Low  
V
Active High  
-
V
mA  
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  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
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  
Vo  
511  
Rtrimdown  
10.22  
delta  
Module  
Trim  
GND  
Rtrimdown  
(100 delta)Vo 5.11313  
0.6125delta  
Rtrimup  
10.22  
Note:  
Vo _ req Vo  
Vo  
   
100 %  
delta   
Vo  
Rtrimup  
Module  
Vo_req=Desired (trimmed) output voltage [V]  
Vo=1.202 V  
Trim  
GND  
2) Trim Equations for Vo=1.5 V - 12 V  
511  
Rtrimdown  
10.22  
delta  
(100 delta)Vo511626  
1.225delta  
Rtrimup  
10.22  
Note:  
Vo _ req Vo  
delta   
100  
%
   
Vo  
Vo_req=Desired (trimmed) output voltage [V]  
Vo=1.503V, Vo=1.800V, Vo=2.505V, Vo=3.308V, Vo=5.002V, Vo=12.007V  
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  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Efficiency Data  
xRSB-40UV2x  
xRSB-40UV5x  
85%  
80%  
75%  
70%  
65%  
60%  
55%  
50%  
45%  
90%  
85%  
80%  
75%  
70%  
65%  
60%  
55%  
50%  
45%  
18V  
24V  
48V  
75V  
18V  
24V  
48V  
75V  
1.80  
4.50  
9.00  
13.50  
18.00  
1.6A  
4A  
8A  
12A  
16A  
12.00  
8.00  
OUTPUT CURRENT (A)  
OUTPUT CURRENT (A)  
xRSB-40U02x  
xRSB-40UV8x  
90%  
90%  
85%  
80%  
75%  
70%  
65%  
60%  
55%  
50%  
85%  
80%  
75%  
70%  
65%  
60%  
55%  
50%  
45%  
18V  
24V  
48V  
75V  
18V  
24V  
48V  
75V  
1.4A  
3.5A  
7A  
10.5A  
14A  
1.20  
3.00  
6.00  
9.00  
OUTPUT CURRENT (A)  
OUTPUT CURRENT (A)  
xRSB-40U05x  
xRSB-40U03x  
90%  
85%  
80%  
75%  
70%  
65%  
60%  
55%  
50%  
90%  
85%  
80%  
75%  
70%  
65%  
60%  
55%  
50%  
18V  
24V  
48V  
75V  
18V  
24V  
48V  
75V  
0.80  
2.00  
4.00  
6.00  
1.00  
2.50  
5.00  
7.50  
10.00  
OUTPUT CURRENT (A)  
OUTPUT CURRENT (A)  
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  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Efficiency Data (continued)  
xRSB-40U12x  
90%  
85%  
80%  
75%  
70%  
65%  
60%  
55%  
50%  
18V  
24V  
48V  
75V  
0.35  
0.88  
1.75  
2.63  
3.50  
OUTPUT CURRENT (A)  
Thermal Derating Curves  
xRSB-40UV2x, Vin=48V  
xRSB-40UV2x, Vin=24V  
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  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Thermal Derating Curves (continued)  
xRSB-40UV5x, Vin=48V  
xRSB-40UV5x, Vin=24V  
xRSB-40UV8x, Vin=48V  
xRSB-40UV8x, Vin=24V  
xRSB-40U02x, Vin=48V  
xRSB-40U02x, Vin=24V  
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  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Thermal Derating Curves (continued)  
xRSB-40U03x, Vin=48V  
xRSB-40U03x, Vin=24V  
xRSB-40U05x, Vin=48V  
xRSB-40U05x, Vin=24V  
xRSB-40U12x, Vin=48V  
xRSB-40U12x, Vin=24V  
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  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Ripple and Noise Waveforms  
48 Vdc input, 1.2 Vdc output  
48 Vdc input, 1.5 Vdc output  
48 Vdc input, 1.8 Vdc output  
48 Vdc input, 2.5 Vdc output  
48 Vdc input, 3.3 Vdc output  
48 Vdc input, 5.0 Vdc output  
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  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Ripple and Noise Waveforms (continued)  
48 Vdc input, 12 Vdc output  
Note: Ripple and noise at full load, with external a 1 uF ceramic cap and a 470 uF Tantalum cap for 1.2-1.8V  
output, with external a 1 uF ceramic cap and a 10 uF Tantalum cap for 2.5V and 12V output, with external  
a 1 uF ceramic cap and a 220 uF Tantalum cap for 3.3V output, with external a 1 uF ceramic cap and a  
100 uF Tantalum cap for 5V output, Ta=25 deg C.  
Transient Response Waveforms  
Vout=1.2 V 50% to 25% Load Transients  
Vout=1.2 V 25% to 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  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Transient Response Waveforms (continued)  
Vout=1.5 V 50% to 25% Load Transients  
Vout=1.8 V 50% to 25% Load Transients  
Vout=2.5 V 50% to 25% Load Transients  
Vout=1.5 V 25% to 50% Load Transients  
Vout=1.8 V 25% to 50% Load Transients  
Vout=2.5 V 25% to 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  
13  
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Transient Response Waveforms (continued)  
Vout=3.3 V 50% to 25% Load Transients  
Vout=3.3 V 25% to 50% Load Transients  
Vout=5.0 V 50% to 25% Load Transients  
Vout=5.0 V 25% to 50% Load Transients  
Vout=12 V 50% to 25% Load Transients  
Vout=12 V 25% to 50% Load Transients  
Note: Transient Response at Vin=48 V, di/dt=0.1 A/uS, with external a 1 uF ceramic cap and a 470 uF Tantalum  
cap for 1.2-1.8V output, with external a 1 uF ceramic cap and a 10 uF Tantalum cap for 2.5V and 12V output,  
with external a 1 uF ceramic cap and a 220 uF Tantalum cap for 3.3V output, with external a 1 uF ceramic cap  
and a 100 uF Tantalum cap for 5V 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  
14  
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Startup  
Rise Time  
Startup time  
CH1: Vout  
Vout=1.2V 100% Load at Vin=48V  
CH2: Vin  
Vout=1.2V 100% Load at Vin=48V  
Rise Time  
Startup time  
CH1: Vout  
CH2: Vin  
Vout=1.5V 100% Load at Vin=48V  
Vout=1.5V 100% Load at Vin=48V  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
15  
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Startup (continued)  
Rise Time  
Startup time  
CH1: Vout  
Vout=1.8V 100% Load at Vin=48V  
CH2: Vin  
Vout=1.8V 100% Load at Vin=48V  
Rise Time  
Startup time  
CH1: Vout  
CH2: Vin  
Vout=2.5V 100% Load at Vin=48V  
Vout=2.5V 100% Load at Vin=48V  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
16  
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Startup (continued)  
Rise Time  
Startup time  
CH1: Vout  
CH2: Vin  
Vout=3.3V 100% Load at Vin=48V  
Vout=3.3V 100% Load at Vin=48V  
Rise Time  
Startup time  
CH1: Vout  
CH2: Vin  
Vout=5V 100% Load at Vin=48V  
Vout=5V 100% Load at Vin=48V  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
17  
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Startup (continued)  
Rise Time  
Startup time  
CH1: Vout  
CH2: Vin  
Vout=12V 100% Load at Vin=48V  
Vout=12V 100% Load at Vin=48V  
Note: Start up waveform, External 220uF Tantalum Cap and 1uF Ceramic Cap, 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  
18  
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
SMT Package (SRSB-40Uxxx)  
Pin Connections  
Pin  
Function  
1
2
3
4
5
6
7
8
Vin (+)  
Remote On/Off  
Vin (-)  
Vout (-)  
Remote Sense (-)  
Trim  
Remote Sense (+)  
Vout (+)  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
19  
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Through Hole Package (0RSB-40Uxxx)  
Pin Connections  
Pin  
Function  
1
Vin (+)  
2
Remote On/Off  
Vin (-)  
3
4
Vout (-)  
5
Remote Sense (-)  
Trim  
6
7
Remote Sense (+)  
Vout (+)  
8
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  
20  
ISOLATED DC/DC CONVERTERS  
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick  
Apr. 07, 2011  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Revision History  
Date  
Revision  
Changes Detail  
1. Add input transient voltage in absolute maximum ratings.  
2. Add input over voltage lockout in input specifications.  
3. Add startup waveform.  
Approval  
2011-04-07  
C
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. 040711  
21  
CORPORATE  
FAR EAST  
EUROPE  
Bel Fuse Inc.  
Bel Fuse Ltd.  
Bel Fuse Europe Ltd.  
206 Van Vorst Street  
Jersey City, NJ 07302  
Tel 201-432-0463  
Fax 201-432-9542  
www.belfuse.com  
8F/ 8 Luk Hop Street  
San Po Kong  
Kowloon, Hong Kong  
Tel 852-2328-5515  
Fax 852-2352-3706  
www.belfuse.com  
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  
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