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0RSB-50T03C

型号：

0RSB-50T03C

描述：

隔离式DC / DC转换器[ ISOLATED DC/DC CONVERTERS ]

品牌：

BEL[ BEL FUSE INC. ]

页数：

15 页

PDF大小：

313 K

下载PDF手册
ISOLATED DC/DC CONVERTERS  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
xRSB-50T03C  
Features  
RoHS Compliant  
Rev.B  
•
•
•
•
•
•
•
•
•
Isolated  
•
•
•
•
•
•
Output Over Voltage Shutdown  
Output Voltage Trim  
Over Temperature Protection  
SCP/OCP  
High Efficiency  
Fixed Frequency (600 kHz)  
High Power Density  
Input Under Voltage Lockout  
Low Cost  
Basic Insulation  
Remote On/Off  
Positive/Negative Remote Sense  
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-50T03C is an isolated dc/dc converter that operates from a nominal 48 Vdc source. This unit will  
provide up to 50 W of output power from a nominal 48 Vdc input. This unit is designed to be highly efficient and  
low cost. Features include remote on/off, over current protection and under voltage lockout. The converter is  
provided in an industry standard sixteenth brick package.  
Part Selection  
Output Voltage  
Input Voltage  
Max. Output  
Current  
Max. Output  
Power  
Typical  
Efficiency  
Model Number  
Active Low  
3.3 Vdc  
36 Vdc - 75 Vdc  
15 A  
50 W  
89%  
xRSB-50T03C  
Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging.  
Part Number Explanation  
x R SB – 50 T 03 C  
1 2  
3
4
5 6  
7
1---“x” can be “0” or “S”, “0” mean through hole mount and “S” mean surface mount  
2---RoHS 6, change “R” to “7” means RoHS 5  
3---Series name, 1/16 brick  
4---Series code  
5---Input range (36-75V)  
6---Output voltage (3.3V)  
7---Suffix  
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  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Absolute Maximum Ratings  
Unit  
Parameter  
Min  
Typ  
Max  
Notes  
Continuous non-operating Input  
Voltage  
-0.3  
-
80  
V
Input Transient Voltage  
Remote On/Off  
-
-
-
-
-
-
100  
18  
V
V
100mS maximum  
-0.3  
-
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  
Operating Input Voltage  
36  
48  
75  
V
Input Current (full load)  
Input Current (no load)  
Remote Off Input Current  
-
-
-
-
2
120  
3
A
70  
1
mA  
mA  
Input Reflected Ripple Current  
(rms)  
With simulated source impedance of  
10uH, 5Hz to 20MHz; use a  
100uF/100V electrolytic capacitor with  
ESR=1 ohm max, at 200 kHz.  
-
-
3
7
mA  
Input Reflected Ripple Current  
(pk-pk)  
20  
50  
mA  
I2t Inrush Current Transient  
Turn-on Voltage Threshold  
Turn-off Voltage Threshold  
-
-
-
0.02  
35  
-
A2s  
V
32  
31  
30  
V
CAUTION: This converter is not internally fused. An input line fuse must be used in application.  
Recommend a fast-acting fuse with maximum rating of 5A on system board. Refer to the fuse  
manufacture’s datasheet for further information.  
Notes: 1. This converter has internal L-C (1.0uH-1.0uF) filter.  
2. All specifications are typical at 25 °C unless otherwise stated.  
Output Specifications  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Output Voltage Set Point  
3.25  
3.30  
3.35  
V
Vin=48 V, Io=50%Load  
Load Regulation  
Line Regulation  
-
-
±4  
±3  
±9  
±8  
mV  
mV  
Regulation Over Temperature  
(-40deg.C-85deg.C)  
-
±9  
±16  
mV  
0-20MHz BW, with a 1µF ceramic  
capacitor and the minimum  
external cap at output  
Ripple and Noise (pk-pk)  
Ripple and Noise (rms)  
-
-
55  
12  
90  
25  
mV  
mV  
Output Ripple and Noise(Pk-Pk)  
under worst case  
over all operating input voltage,  
load and ambient temperature  
-
-
100  
mV  
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  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Output Specifications (continued)  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Output Current Range  
0
-
15  
A
Output DC Current Limit  
Short Circuit Surge Transient  
Rise Time  
19  
22  
-
26  
1
A
-
A2s  
mS  
mS  
mS  
%
-
-
15  
-
35  
35  
0
70  
Enable form Vin  
Turn on Time  
-
-
70  
Enable form ON/OFF  
Overshoot at Turn on  
5
Output Capacitance  
3000  
-
10000  
uF  
Transient Response  
△V  
50%~75%  
of Max Load  
Overshoot  
Settling Time  
Overshoot  
-
-
-
-
150  
120  
150  
120  
250  
200  
250  
200  
mV  
uS  
di/dt=0.1A/us, Vin=48Vdc, Ta=25°C,  
with a 1µF ceramic capacitor and  
the minimum external cap at output  
Vo=  
3.3 V  
△V  
75%~50%  
of Max Load  
mV  
uS  
Settling Time  
Note: All specifications are typical at nominal input, full load at 25°C unless otherwise stated.  
General Specifications  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Vin=48 V, full load.  
Efficiency  
86  
89  
-
%
Switching Frequency  
Over Temperature Protection  
Over Voltage Protection (Static)  
Weight  
-
-
-
-
600  
120  
4.29  
13  
-
kHz  
℃
V
140  
5.28  
-
g
Calculated Per Bell Core SR-332  
(Vin=48V, Vo=3.3V, Io=80%load, Ta  
= 25 °C, FIT=109/MTBF)  
FIT  
TBD  
-
Dimensions  
Inches (L × W × H)  
Millimeters (L × W × H)  
-
-
0RSB-50T03C  
SRSB-50T03C  
1.30 x 0.9 x 0.38  
33.02 x 22.86 x 9.60  
Dimensions  
Inches (L × W × H)  
Millimeters (L × W × H)  
1.30 x 0.9 x 0.36  
33.02 x 22.86 x 9.24  
Isolation characteristics  
Input to Output  
-
10M  
-
-
-
1500  
V
Isolation Resistance  
Isolation Capacitance  
-
-
Ohm  
pF  
3900  
Note: All specifications are typical 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  
3
ISOLATED DC/DC CONVERTERS  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Efficiency Data  
90.00%  
85.00%  
80.00%  
75.00%  
70.00%  
65.00%  
60.00%  
55.00%  
50.00%  
36V  
48V  
75V  
1.5A  
3.75A  
7.5A  
11.25A  
15A  
OUTPUT CURRENT(A)  
Thermal Derating Curve  
Maximum junction temperature of semiconductors derated to 120 degree C.  
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  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Thermal Derating Curve (continued)  
Temperature reference points on top side  
Temperature reference points on bottom side  
Ripple and Noise Waveform  
48 Vdc input, 3.3 Vdc/15 A output  
Note: Ripple and noise at full load, and with a 1uF ceramic cap and a 3000 uF cap at 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  
5
ISOLATED DC/DC CONVERTERS  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Transient Response Waveforms  
50%-75% Load Transients at Vin=48 V  
75%-50% Load Transients at Vin=48 V  
Note: Transient response at di/dt=0.1A/us, with 1uF ceramic cap and 3000uF cap at output, and Ta=25 deg C.  
Remote On/Off  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Signal Low (Unit On)  
-0.3  
-
0.8  
V
Active Low  
The remote on/off pin open, Unit off.  
Signal High (Unit Off)  
Current Sink  
2.95  
0
-
-
18  
1
V
mA  
Recommended remote on/off circuit for active low  
Vin+  
On/off  
Vin-  
Vin+  
On/off  
Vin-  
Control with open collector/drain circuit  
Control with photocoupler circuit  
Vin+  
Vin+  
Vcc  
On/off  
Vin-  
On/off  
Vin-  
Control with logic circuit  
Permanently on  
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  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Output Trim Equations  
Equations for calculating the trim resistor are shown below. The Trim Down resistor should be connected  
between the Trim pin and GND pin. The Trim Up resistor should be connected between the Trim pin and the  
Vout pin. Only one of the resistors should be used for any given application.  
Minimum trim down voltage is 2.97V  
Maximum trim up voltage is 3.63V.  
The total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage.  
Vout  
511  
Rtrimdown =  
−10.22  
[
kΩ  
]
delta  
Module  
Module  
Trim  
GND  
Rtrimdown  
Rtrimup  
(100 + delta)⋅Vo⋅5.11− 626  
1.225⋅delta  
Vout  
Trim  
GND  
Rtrimup =  
−10.22[kΩ  
]
Note:  
(
)
Vo _ req −Vo  
delta =  
×100  
[%]  
Vo  
Vo_req=Desired (trimmed) output voltage [V]  
Output voltage Vo=3.308 V  
1500  
1350  
1200  
1050  
900  
750  
600  
450  
300  
150  
0
300  
270  
240  
210  
180  
150  
120  
90  
60  
30  
0
3.3 3.33 3.37 3.4 3.43 3.46 3.5 3.53 3.56 3.6 3.63  
Adjusted output voltage Vo,adj(V)  
2.64 2.71 2.77 2.84 2.9 2.97 3.04 3.1 3.17 3.23 3.3  
Adjusted output voltage Vo,adj (V)  
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  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Remote Sense  
This module has remote sense compensation feature. It can minimize the effects of resistance between  
module’s output and load in system layout and facilitates accurate voltage regulation at load terminals or  
other selected point.  
1. The remote sense lines carries very little current and hence do not require a large cross-sectional area.  
2. This module compensates for a maximum drop of 10% of the nominal output voltage.  
3. If the unit is already trimmed up, the available remote sense compensation range should be  
correspondingly reduced. The total voltage increased by trim and remote sense should not exceed 10%  
of the nominal output voltage.  
4. When using remote sense compensation, all the resistance, parasitic inductance and capacitance of the  
system are incorporated within the feedback loop of this module. It can make an effect on the module's  
compensation, affecting the stability and dynamic response. A 0.1uF ceramic capacitor can be  
connected at the point of load to de-couple noise on the sense wires.  
5. Recommend the connection of remote sense compensation as below figure. There are a resistor RS+  
(100 ohm) from Vo+ to Sense+ and a resistor RS- (51 ohm)) from Vo- to Sense- inside of this module.  
Vo+  
Sense+  
Load  
Sense-  
Vo-  
6. If not using remote sense compensation, please connect sense directly to output at module's pin, that is,  
connect sense+ to Vo+ and sense- to Vo- at module's pin, the shorter the better. See below figure.  
Vo+  
Sense+  
Load  
Sense-  
Vo-  
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  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Startup & Shutdown  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Rise time  
Test Condition:  
48Vin, 3.3V/15A  
Startup time  
Startup from Vin  
Ch1: Vo, Ch2: Vin  
Startup from on/off  
Startup from on/off, Ch2: Vin  
Test Condition: 48Vin, 3.3V/15A  
Test Condition: 48Vin, 3.3V/15A  
Shutdown  
Test Condition:  
48Vin, 3.3V/15A  
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  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Over Current Protection  
To provide protection in a fault output overload condition, the module is equipped with internal current-limiting  
circuitry and can endure current limiting for a few mili-seconds. If the overcurrent condition persists beyond a few  
milliseconds, the module will shut down into hiccup mode and restart once every 300mS. The module operates  
normally when the output current goes into specified range. The typical average output current is 0.8A during  
hiccup.  
Expansion of on time portion of above figure  
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  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Over Voltage Protection  
The output overvoltage protection consists of circuitry that monitors the voltage on the output terminals. If the  
voltage on the output terminals exceeds the over voltage protection threshold, the module will shutdown into  
hiccup mode and restart once every 400mS. The module operates normally when the fault is cleared.  
Test setup:  
Vo+  
K
Trim  
R=100ohm  
R
Vo-  
CH1: Output voltage waveform  
CH2: Output Current waveform  
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  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Over Temperature Protection  
The OTP is achieved by thermistor U1 and the threshold is set at 120C in non-latch mode; the hottest component  
Q5 reaches 130C with 100LFM air flow correspondingly. It will restart automatically when the temperature falls  
down to 100C. The protecting point will be varied a little under different conditions (air flow, ambient temperature,  
input voltage, load...).  
the hottest component Q5 on top view  
thermistor U1 on bottom view  
Under Voltage Lockout  
Under-voltage Lockout  
Voltage Falling  
Voltage Rising  
Input Voltage (V)  
V1  
V2  
V1=31V  
V2=32V  
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  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Mechanical Outline  
0RSB-50T03C  
Pin Connections  
pin# function pin# function  
1
2
3
4
Vin (+)  
On/Off  
Vin (-)  
Vo (-)  
5
6
7
8
RS (-)  
Trim  
RS (+)  
Vo (+)  
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 260ºC 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  
13  
ISOLATED DC/DC CONVERTERS  
36 Vdc - 75 Vdc Input,  
3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Mechanical Outline (continued)  
SRSB-50T03C  
Pin Connections  
pin# function pin# function  
1
2
3
4
Vin (+)  
On/Off  
Vin (-)  
Vo (-)  
5
6
7
8
RS (-)  
Trim  
RS (+)  
Vo (+)  
Note: This module is recommended and compatible with Pb-Free Reflow Soldering and must be soldered  
using a reflow profile with a peak temperature of no more than 260ºC 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  
36 Vdc - 75 Vdc Input, 3.3 Vdc/15 A Output  
Jul. 09, 2010  
Bel Power Inc., a subsidiary of Bel Fuse Inc.  
Revision History  
Date  
Version  
Changes Detail  
Approval  
Jack Fan  
JZ Wang  
2010-3-23  
2010-7-9  
A
B
First release  
Update the Outline drawing of 0RSB-50T03C  
RoHS Compliance  
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and  
other hazardous substances from electronic products.  
©2010 Bel Fuse Inc. Specifications subject to change without notice. 070910  
15  
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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