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0RSB-40U12L

型号：

0RSB-40U12L

品牌：

BEL[ BEL FUSE INC. ]

页数：

12 页

PDF大小：

271 K

下载PDF手册
ISOLATED DC/DC CONVERTERS  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
0RSB-40U12B RoHS Compliant PRELIMINARY Rev.A  
Features  
Isolated  
Output Over-voltage Shut Down  
Over Temperature Protection  
OCP/SCP  
High Efficiency  
Fixed Frequency  
High Power Density  
Low Cost  
Remote ON/OFF  
Positive/Negative Remote Sense  
Basic Insulation  
Input Under-voltage Lockout  
Output Voltage Trim  
Class 1, Category 2, Isolated DC/DC Converter (refer to IPC-9592)  
Applications  
Networking  
Computers and peripherals  
Telecommunications  
Description  
The 0RSB-40U12B series is isolated dc/dc converter that operates from a nominal 24 Vdc or 48 Vdc source.  
These units will provide up to 42 W of output power from an 18 - 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 Voltage  
Input Voltage  
Max. Output  
Current  
Max. Output  
Power  
Typical  
Efficiency  
Model Number  
Active Low  
12 Vdc  
18 Vdc - 75 Vdc  
3.5 A  
42 W  
85%  
0RSB-40U12B  
Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging.  
Part Number Explanation  
0 R SB – 40 U 12 B  
1
2
3
4
5
6
7
1---Through hole mount  
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 (12V)  
7---Option, “x” of the model part number to be 0-9, A-Z, which will represent the special request of  
customer.  
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  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Absolute Maximum Ratings  
Unit  
Parameter  
Min  
Typ  
Max  
Notes  
Continuous 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  
18  
48  
75  
V
Input Current (full load)  
Input Current (no load)  
Remote Off Input Current  
-
-
-
-
60  
1
3.5  
120  
3
A
mA  
mA  
Input Reflected Ripple Current  
(rms)  
With simulated source impedance of  
15uH, 5Hz to 20MHz. Use a  
100uF/100V electrolytic capacitor with  
ESR=1 ohm max, at 200KHz@25°C.  
-
-
3
7
mA  
Input Reflected Ripple Current  
(pk-pk)  
20  
50  
mA  
I2t Inrush Current Transient  
Input Over Voltage Lockout  
Turn-on Voltage Threshold  
Turn-off Voltage Threshold  
-
0.01  
-
0.02  
82  
A2s  
V
78  
16.6  
16.2  
17.2  
16.8  
17.8  
17.4  
V
V
Note: All specifications are typical at 25 C unless otherwise stated.  
Output Specifications  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Output Voltage Set Point  
11.75  
12  
12.25  
V
Vin=48V, Io=50% load  
Load Regulation  
Line Regulation  
-
-
±9  
±6  
±18  
±15  
mV  
mV  
Regulation Over Temperature  
(-40deg.C-85deg.C)  
-
-
±20  
±35  
mV  
mV  
0-20MHz BW, with a 1µF  
ceramic capacitor and a 10uF  
Tantalum cap at output.  
Output Ripple and Noise (pk-pk)  
90  
180  
Output Ripple and Noise (rms)  
Output Current Range  
-
0
30  
-
55  
3.5  
6
mV  
A
Output DC Current Limit  
3.7  
5
A
Hiccup mode, auto recovery  
Short Circuit Surge Transien  
Turn on Time  
-
-
0.5  
25  
1
A2s  
mS  
50  
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  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Output Specifications (continued)  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Overshoot at Turn on  
-
0
5
%
Output Capacitance  
10  
-
220  
uF  
Transient Response  
△V  
25%~50%  
of Max Load  
Overshoot  
Settling Time  
Overshoot  
-
400  
150  
400  
150  
650  
300  
650  
300  
mV  
uS  
di/dt=0.1A/us, Vin=48Vdc, Ta=25°C,  
with a 1µF ceramic capacitor and a  
10uF Tantalum cap at output.  
-
-
-
Vo=  
12 V  
△V  
50%~25%  
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=48V, full load  
Efficiency  
83  
85  
-
%
Switching Frequency  
-
500  
-
kHz  
The OTP threshold is set at 125°C in  
non-latch mode, and the module will  
restart automatically when  
Over Temperature Protection  
-
125  
-
℃
temperature falls down to 115°C.  
This voltage is achieved by trimming  
up output slowly.  
Over Voltage Protection(Static)  
-
-
130  
14  
160  
-
%
g
Weight  
Dimensions  
Inches (L × W × H)  
Millimeters (L × W × H)  
1.30 x 0.90 x 0.46  
33.02 x 22.86 x 11.69  
-
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  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Efficiency Data  
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)  
Remote On/Off  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Signal Low (Unit On)  
Signal High (Unit Off)  
Current Sink  
-0.3  
2.4  
0
-
0.8  
18  
1
V
Active Low  
Remote on/off pin open, Unit off.  
-
-
V
mA  
Recommended remote on/off circuit for active low  
Vin+  
Vin+  
On/off  
Vin-  
On/off  
Vin-  
Control with open collector/drain circuit  
Control with photocoupler circuit  
Vin+  
Vin+  
Vcc  
On/off  
On/off  
Vin-  
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  
4
ISOLATED DC/DC CONVERTERS  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Thermal Derating Curve  
Maximum junction temperature of semiconductors derated to 120 degree C.  
Vin=24V  
Vin=48V  
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  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Thermal Derating Curve (continued)  
The OTP is achieved by thermistor R65 and it is in non-latch mode when the hottest component Q5 reaches  
130°C with 100LFM air flow correspondingly. It will restart automatically when the temperature falls down to  
110°C. The protecting point will be varied a little under different conditions (air flow, ambient temperature, input  
voltage, load...).  
Temperature reference points on top side  
Temperature reference points on bottom side  
Ripple and Noise Waveform  
48Vdc input, 12Vdc output  
Note: Ripple and noise at full load, with a 1uF ceramic cap and a 10 uF Tantalum 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  
6
ISOLATED DC/DC CONVERTERS  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Transient Response Waveforms  
Vout= 12V 25%-50% Load Transients  
Vout= 12V 50%-25% Load Transients  
Note: Transient Response at Vin=48V, di/dt=0.1A/uS, with External 10uF Tantalum Cap and 1uF Ceramic Cap  
at the output, Ta=25 deg C.  
Startup & Shutdown  
Rise Time  
Startup time  
Startup from Vin  
Ch1: Vout  
Vin=48V, Vout=12V, 100% Load  
Ch2: Vin  
Vin=48V, Vout=12V, 100% Load  
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  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
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 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.  
Vout  
511  
Module  
Module  
Trim  
GND  
Rtrimdown  
10.22  
k  
Rtrimdown  
Rtrimup  
delta  
Vout  
Trim  
GND  
(100delta)Vo 5.11626  
1.225delta  
Rtrimup   
10.22
k  
Note:  
Vo _ req Vo  
delta   
100  
%
  
Vo  
Vo_req=Desired (trimmed) output voltage [V]  
Output voltage Vo=12.007 V  
5000  
4500  
4000  
3500  
3000  
2500  
2000  
1500  
1000  
500  
400  
360  
320  
280  
240  
200  
160  
120  
80  
40  
0
0
12  
12.12 12.24 12.36 12.48 12.6 12.72 12.84 12.96 13.08 13.2  
Adjusted output voltage Vo,adj(V)  
9.8 10.02 10.24 10.46 10.68 10.9 11.12 11.34 11.56 11.78 12  
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  
8
ISOLATED DC/DC CONVERTERS  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
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  
9
ISOLATED DC/DC CONVERTERS  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
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 over current condition persists beyond a few  
milliseconds, the module will shut down into hiccup mode and restart once every 400mS. The module operates  
normally when the output current goes into specified range. The typical average output current is 0.5A during  
hiccup.  
Vin=48V  
Vin=24V  
Input Under-voltage Lockout  
Under-voltage Lockout  
Voltage Falling  
Voltage Rising  
V1=16.8V  
V2=17.2V  
Input Voltage (V)  
V1  
V2  
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  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Mechanical Outline  
Pin  
1
Function  
Vin(+)  
Dia.  
0.04’’  
0.04’’  
0.04’’  
0.062’’  
Pin  
5
Function  
SENSE(-)  
TRIM  
Dia.  
0.04’’  
0.04’’  
0.04’’  
0.062’’  
2
On/Off  
Vin(-)  
6
3
7
SENSE(+)  
Vout(+)  
4
Vout(-)  
8
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 260 ºC 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  
11  
ISOLATED DC/DC CONVERTERS  
18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output  
Apr. 19, 2011  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Revision History  
Date  
Revision  
PA  
Changes Detail  
Approval  
2011-04-19  
First release  
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. 041911  
12  
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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