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ULS-6.5/15-D48PM-C [MURATA]

民用设备,工业设备;
ULS-6.5/15-D48PM-C
型号： ULS-6.5/15-D48PM-C
厂家： muRata    muRata
描述：

民用设备,工业设备
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中文：  中文翻译
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ULS 100-Watt Series  
s
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
ypical units  
FEATURES  
PRODUCT OVERVIEW  
The new ULS 100 Watts series offers output  
voltages of 3.3Vout (30A), 5Vout (20A), 6.5Vout  
(15A), and 12Vout (8.3A). The ULS sixteenth-brick  
series maintains a width of 0.9 inches while still  
retaining up to 100 Watt output and full 2250 Volt  
DC isolation. The PC-board mount converter fam-  
ily accepts 36 to 75 Volts DC inputs and delivers  
fixed outputs regulated to within 0.2ꢀ. The ULS  
converters are ideal for datacom and telecom ap-  
plications, cell phone towers, data centers, server  
farms and network repeaters.  
ULS outputs may be trimmed within 10ꢀ of  
nominal output while delivering fast settling to  
current step loads and no adverse effects from  
higher capacitive loads. Excellent ripple and noise  
specifications assure compatibility to circuits using  
CPU’s, ASIC’s, programmable logic and FPGA’s. No  
minimum load is required. For systems requiring  
controlled startup/shutdown, an external remote  
On/Off control may use a switch, transistor or  
digital logic. Remote Sense inputs compensate for  
resistive line drops at high currents.  
Many self-protection features on the ULS series  
avoid both converter and external circuit hazards.  
These include input undervoltage lockout and  
overtemperature shutdown. The output current  
limit uses the “hiccup” autorestart technique (i.e.,  
the outputs may be short-circuited indefinitely).  
Additional features include output overvoltage  
protection too.  
ꢀ„  
Industry standard DOSA "Sixteenth-brick"  
format and pinout with surface mount option  
ꢀ„  
36-75 Volts DC input range, 3.3, 5, 6.5, and  
12 Vdc outputs.  
ꢀ„  
2250 Volt Basic input/output isolation  
ꢀ„  
Up to 100 Watts total output power  
ꢀ„  
High efficiency synchronous rectifier topology  
ꢀ„  
Stable no-load operation with no required  
external components  
ꢀ„  
Operating temperature range -40 to +85°C  
with derating  
The synchronous rectifier topology yields high  
efficiency for minimal heat buildup and “no fan”  
operation.  
ꢀ„  
Certified to UL 60950-1, CSA-C22.2 No. 234,  
EN60950-1 safety approvals, 2nd Edition  
ꢀ„  
Extensive self-protection features  
Isolation  
F1  
+Vin (1)  
+Vout (8)  
Barrier  
• Switching  
• Filters  
+Sense (7)  
External  
DC  
Power  
Source  
On/Off  
Control  
(2)  
Controller  
and Power  
Transfer  
• Current Sense  
-Sense (5)  
Open = On  
Closed = Off  
(Positive  
logic)  
Reference and  
Error Amplifier  
Trim (6)  
-Vin (3)  
-Vout (4)  
Typical topology is shown  
Figure 1. Simplified Block Diagram  
For full details go to  
REG.-Nr. D216  
www.murata-ps.com/rohs  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 1 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE  
Output  
Input  
Efficiency  
Dimensions  
(inches)  
Root Model   
R/N (mV pk-pk) Regulation (max.)   
Vin Nom. Range Iin, no load  
Vout  
Iout  
Power  
Iin, full  
load (A)  
(V)  
(A, max.) (W)  
(V)  
(V)  
(mA)  
Typ.  
70  
Max.  
100  
120  
120  
150  
Line  
Load  
Min. Typ.  
90ꢀ 91ꢀ  
89ꢀ 91ꢀ  
90ꢀ 93ꢀ  
89ꢀ 92ꢀ  
ULS-3.3/30-D48  
ULS-5/20-D48  
ULS-6.5/15-D48  
ULS-12/8.3-D48  
3.3  
5
30  
20  
15  
8.3  
99  
0.1ꢀ  
0.2ꢀ  
48  
48  
48  
48  
36-75  
36-75  
36-75  
36-75  
50  
50  
41  
50  
2.27  
2.29  
2.18  
2.26  
1.3x0.9x0.4  
1.3x0.9x0.4  
1.3x0.9x0.4  
1.3x0.9x0.4  
100  
97.5  
99.6  
60  
0.125ꢀ 0.125ꢀ  
0.125ꢀ 0.125ꢀ  
6.5  
12  
60  
80  
0.125ꢀ  
0.25ꢀ  
Please refer to the Part Number Structure when ordering.  
Regulation specifications describe output voltage deviations from a nominal/midpoint value to either  
extreme (50ꢀ load step).  
All specifications are typical at nominal line voltage and full load, +25°C unless otherwise noted.  
See detailed specifications. Output capacitors are 1 μF ceramic multilayer in parallel with 10 μF and a  
220µF/100V external input capacitor is needed for the ULS-12/8.3-D48 model.  
I/O caps are necessary for our test equipment and may not be needed for your application.  
PART NUMBER STRUCTURE  
ULS - 3.3 /  
30  
- D48  
N M H Lx  
- C  
RoHS Hazardous Substance Compliance  
(does not claim EU RoHS exemption 7b–lead in solder)  
C = RoHS-6  
Sixteenth Brick Series  
Pin Length Option (Thru-hole only)  
Blank = Standard pin length 0.180˝ (4.6mm)  
L1 = 0.110˝ (2.79mm) ➀  
L2 = 0.145˝ (3.68mm) ➀  
Nominal Output Voltage:  
Conformal Coating Option  
Blank = No coating, standard  
H = Coating added, optional ➀  
(H option is not available on SMT models.)  
Maximum Rated Output Current  
Current in Amps  
SMT Version Option  
Blank = Through-hole mount  
Input Voltage Range:  
D48 = 36-75 Volts (48V nominal)  
M = Surface mount (MSL Rating 3) ➁  
On/Off Control Logic Option  
N = Negative  
P = Positive  
➀ꢀ Special quantity order is required; samples available with standard pin length only.  
➁ꢀ SMT (M) versions not available in sample quantities.  
➂ꢀ Some model number combinations may not be available. See website or contact your local Murata sales representative.  
Simplified Murata-PS logo  
Product Label  
ꢅꢂꢆ  
As shown in figure 2, because of the small size of these products, the product  
MODEL NAME  
labels contain a simplified Murata-PS logo and a character-reduced code to  
indicate the model number and manufacturing date code. Not all items on  
the label are always used. Please note that the label differs from the product  
photograph.  
ꢀaꢁꢂꢃ ꢄ  
Figure 2. Label Artwork Layout  
REG.-Nr. D216  
Serial # (4 digits)  
Date code  
0001  
YYWW  
Bar code: Data matrix  
ꢀaꢁꢂꢃ ꢇ  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 2 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
FUNCTIONAL SPECIFICATIONS, ULS-3.3/30-D48  
ABSOLUTE MAXIMUM RATINGS  
Input Voltage, Continuous  
Input Voltage, Transient  
Isolation Voltage  
Input Reverse Polarity  
On/Off Remote Control  
Output Power  
Minimum  
Typical/Nominal  
Maximum  
80  
100  
Units  
Vdc  
Vdc  
Vdc  
Vdc  
Vdc  
W
Conditions ➀  
0
100 mS max. duration  
Input to output, continuous  
None, install external fuse  
Power on, referred to -Vin  
2250  
None  
0
0
15  
99.99  
Current-limited, no damage, short-circuit  
protected  
Output Current  
0
30  
A
Storage Temperature Range  
Vin = Zero (no power)  
-55  
125  
°C  
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other  
than those listed in the Performance/Functional Specifications Table is not implied or recommended.  
INPUT  
Operating voltage range  
Recommended External Fuse  
Start-up threshold  
Undervoltage shutdown  
Overvoltage shutdown  
Reverse Polarity Protection  
Internal Filter Type  
36  
48  
75  
10  
35.5  
34  
Vdc  
A
Vdc  
Vdc  
Vdc  
Vdc  
Fast blow  
Rising input voltage  
Falling input voltage  
32.5  
31  
34.5  
33  
None  
None  
C
None, install external fuse  
Input current  
Full Load Conditions  
Low Line  
Inrush Transient  
Short Circuit Input Currrent  
No Load  
Shut-Down Input Current (Off)  
Reflected (back) ripple current ➁  
GENERAL and SAFETY  
Efficiency  
Vin = nominal  
Vin = minimum  
2.27  
3.06  
0.05  
50  
50  
14  
2.31  
3.12  
A
A
A2-Sec.  
mA  
100  
150  
18  
Iout = minimum, unit = ON  
mA  
mA  
mA, p-p  
Measured at input with specified filter  
20  
30  
Vin = 48V, full load  
Vin = max., full load  
90  
89  
91  
90  
ꢀ
ꢀ
Isolation  
Isolation Voltage  
Insulation Safety Rating  
Isolation Resistance  
Isolation Capacitance  
Input to output, continuous  
2250  
basic  
100  
Vdc  
MΩ  
pF  
3300  
Certified to UL-60950-1, CSA-C22.2 No.  
60950-1, IEC/EN60950-1, 2nd edition  
Per Telcordia SR332, issue 1, class 3, ground  
fixed, Tambient = +25°C  
Safety  
Yes  
2.6  
Hours x 106  
Calculated MTBF  
DYNAMIC CHARACTERISTICS  
Fixed Switching Frequency  
Startup Time  
460  
480  
5
5
500  
20  
20  
KHz  
mS  
mS  
Power on to Vout regulated  
Remote ON to Vout regulated  
50-75-50ꢀ load step, settling time to within  
2ꢀ of Vout  
Startup Time  
Dynamic Load Response  
10  
75  
25  
µSec  
mV  
Dynamic Load Peak Deviation  
FEATURES and OPTIONS  
Remote On/Off Control  
“N” suffix:  
same as above  
150  
Negative Logic, ON state  
Negative Logic, OFF state  
Control Current  
ON = Ground pin or external voltage  
OFF = Pin open or external voltage  
Open collector/drain  
-0.1  
2.5  
0.8  
15  
2
V
V
mA  
1
1
“P” suffix:  
Positive Logic, ON state  
Positive Logic, OFF state  
Control Current  
ON = Pin open or external voltage  
OFF = Ground pin or external voltage  
Open collector/drain  
3.5  
0
15  
1
2
V
V
mA  
SMT Mounting  
"M" suffix  
Sense pins connected externally to respective  
Vout pins  
Remote Sense  
10  
ꢀ
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 3 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
FUNCTIONAL SPECIFICATIONS, ULS-3.3/30-D48 (CONT.)  
OUTPUT  
Minimum  
Typical/Nominal  
Maximum  
Units  
Conditions ➀  
Total Output Power  
Voltage  
See Derating  
98.1  
99  
99.99  
W
Nominal Output Voltage  
Setting Accuracy  
Output Voltage Range  
Overvoltage Protection  
Current  
Output Current Range  
Minimum Load  
Current Limit Inception  
Short Circuit  
No trim  
At 50ꢀ load, no trim  
User-adjustable  
3.267  
-1  
-10  
3.9  
3.3  
3.333  
1
10  
Vdc  
ꢀ of Vnom  
ꢀ of Vnom.  
Vdc  
Via magnetic feedback  
4.25  
30  
4.95  
0
30  
44  
A
A
98ꢀ of Vnom., after warmup  
33  
37  
Hiccup technique, autorecovery within  
1.25ꢀ of Vout  
Short Circuit Current  
2
5
mA  
Short Circuit Duration  
(remove short for recovery)  
Short circuit protection method  
Regulation  
Output shorted to ground, no damage  
Current limiting  
Continuous  
Line Regulation  
Load Regulation  
Ripple and Noise  
Temperature Coefficient  
Maximum Capacitive Loading  
MECHANICAL (Through Hole Models)  
Outline Dimensions  
(Please refer to outline drawing)  
Weight  
Vin = min. to max., Vout = nom., Iout = nom.  
Iout = min. to max., Vin = 48V  
5 Hz- 20 MHz BW  
0.1  
0.2  
100  
ꢀ of Vout  
ꢀ of Vout  
mV pk-pk  
ꢀ of Vout./°C  
μF  
70  
0.02  
At all outputs  
Low ESR, resistive load only  
4700  
1.3X0.9X0.4  
33X22.9X10.2  
0.56  
Inches  
mm  
Ounces  
Grams  
Inches  
mm  
LxWxH  
16  
Through Hole Pin Diameter  
0.04 & 0.06  
1.016X1.524  
Copper alloy  
50  
Through Hole Pin Material  
TH Pin Plating Metal and Thickness  
Nickel subplate  
Gold overplate  
µ-inches  
µ-inches  
5
ENVIRONMENTAL  
Operating Ambient Temperature Range  
Operating Case Temperature Range  
Storage Temperature  
Thermal Protection/Shutdown  
Electromagnetic Interference  
Conducted, EN55022/CISPR22  
Radiated, EN55022/CISPR22  
Relative humidity, non-condensing  
Altitude  
With Derating  
No derating  
Vin = Zero (no power)  
Measured in center  
External filter is required  
-40  
-40  
-55  
115  
85  
°C  
°C  
°C  
°C  
120  
125  
130  
125  
B
B
Class  
Class  
ꢀRH  
feet  
meters  
To +85°C  
must derate -1ꢀ/1000 feet  
10  
-500  
-152  
90  
10,000  
3048  
RoHS rating  
RoHS-6  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 4 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
Functional Specification Notes  
➀
All specifications are typical unless noted. Ambient temperature =  
+25°Celsius, Vin is nominal, output current is maximum rated nominal.  
External output capacitance is 1 µF multilayer ceramic paralleled with  
10 µF electrolytic. All caps are low ESR. These capacitors are necessary for  
our test equipment and may not be needed in your application.  
Testing must be kept short enough that the converter does not appreciably  
heat up during testing. For extended testing, use plenty of airflow. See  
Derating Curves for temperature performance. All models are stable and  
regulate within spec without external cacacitance.  
➇
➈
Do not exceed maximum power ratings, Sense limits or output overvoltage  
when adjusting output trim values.  
At zero output current, Vout may contain components which slightly  
exceed the ripple and noise specifications.  
➉
ꢀꢀ  
Output overload protection is non-latching. When the output overload  
is removed, the output will automatically recover.  
All models are fully operational and meet published specifications,  
including “cold start” at –40°C.  
➁
➂
Input Ripple Current is tested and specified over a 5-20 MHz bandwidth  
and uses a special set of external filters only for the Ripple Current speci-  
fications. Input filtering is Cin = 33 µF, Cbus = 220 µF, Lbus = 12 µH. Use  
capacitor rated voltages which are twice the maximum expected voltage.  
Capacitors must accept high speed AC switching currents.  
ꢀꢁ  
The converter will shut off if the input falls below the undervoltage thresh-  
old. It will not restart until the input exceeds the Input Start Up Voltage.  
ꢀꢁ  
Short circuit shutdown begins when the output voltage degrades approxi-  
mately 2ꢀ from the selected setting.  
ꢀꢁ  
Output noise may be further reduced by installing an external filter. See  
the Application Notes. Use only as much output filtering as needed and no  
more. Larger caps (especially low-ESR ceramic types) may slow transient  
response or degrade dynamic performance. Thoroughly test your applica-  
tion with all components installed.  
Note that Maximum Current Derating Curves indicate an average current  
at nominal input voltage. At higher temperatures and/or lower airflow, the  
converter will tolerate brief full current outputs if the average RMS current  
over time does not exceed the Derating curve. All Derating curves are  
presented at sea level altitude. Be aware of reduced power dissipation  
with increasing density altitude.  
ꢀꢁ  
To avoid damage or unplanned shutdown, do not sink appreciable reverse  
output current.  
➃
➄
Mean Time Before Failure (MTBF) is calculated using the Telcordia  
(Belcore) SR-332 Method 1, Case 3, Issue 1, ground fixed conditions. Oper-  
ating temperature = +25°C, full output load, natural air convection.  
ꢀꢁ  
A fast blow fuse must be installed in series with +Vin to avoid damage to  
the converter in the event that the source voltage is accidentally applied to  
the converter with reverse polarity.  
The output may be shorted to ground indefinitely with no damage. The  
Output Short Circuit Current shown in the specifications is an average con-  
sisting of very short bursts of full rated current to test whether the output  
circuit can be repowered.  
ꢀꢁ  
Although extremely unlikely, failure of the internal components of this  
product may expose external application circuits to dangerous voltages,  
currents, temperatures or power levels. Please thoroughly verify all appli-  
cations before committing them to service. Be sure to include appropri-  
ately rated FUSES (see specifications and Application Notes) to reduce the  
risk of failure.  
➅
➆
The On/Off Control is normally driven from a switch or relay. An open  
collector/open drain transistor may be used in saturation and cut-off  
(pinch-off) modes. External logic may also be used if voltage levels are  
fully compliant to the specifications.  
ꢀꢁ  
If Sense is not wired to an external load, connect sense pins to their  
respective Vout pins. Do not leave sense unconnected.  
Regulation specifications describe the deviation as the input line voltage  
or output load current is varied from a nominal midpoint value to either  
extreme (50ꢀ load).  
ꢀꢁ  
The switching frequencies of these converters are fixed; see individual  
specifications for model details.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 5 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
TYPICAL PERFORMANCE DATA, ULS-3.3/30-D48  
Efficiency and Power Dissipation  
ꢆꢀ  
ꢆꢅ  
ꢃꢃ  
ꢃꢂ  
ꢃꢁ  
ꢄꢀ  
ꢄꢅ  
ꢀꢃ  
ꢀꢂ  
ꢇꢃ  
ꢇꢀ  
ꢇꢂ  
ꢇꢅ  
ꢇꢁ  
ꢃ
ꢉꢊꢋ ꢌ ꢄꢍꢉ  
ꢉꢊꢋ ꢌ ꢂꢃꢉ  
ꢉꢊꢋ ꢌ ꢈꢀꢉ  
ꢀ
ꢂ
ꢎoꢏer ꢐissiꢑatioꢒ  
ꢉꢊꢋ ꢌ ꢂꢃꢉ  
ꢅ
ꢀꢁ  
ꢅ
ꢁ
ꢂ
ꢀ
ꢃ
ꢇꢁ  
ꢇꢅ  
ꢇꢂ  
ꢇꢀ  
ꢇꢃ  
ꢅꢁ  
ꢅꢅ  
ꢅꢂ  
ꢅꢀ  
ꢅꢃ  
ꢈꢁ  
Iout (Amps)  
Maximum Current Temperature Derating at Sea Level  
Maximum Current Temperature Derating at Sea Level  
(Vin = 48V, airflow is from Vin- to Vin+)  
(Vin = 48V, airflow is from Vin to Vout)  
ꢅꢀ  
ꢅꢁ  
ꢀꢄ  
ꢀꢃ  
ꢀꢂ  
ꢀꢀ  
ꢀꢁ  
ꢅꢀ  
ꢅꢁ  
ꢀꢄ  
ꢀꢃ  
ꢀꢂ  
ꢀꢀ  
ꢀꢁ  
ꢁꢈꢆ ꢉꢊs ꢋꢌꢁꢁ ꢍFꢎꢏ  
ꢌꢈꢁ ꢉꢊs ꢋꢀꢁꢁ ꢍFꢎꢏ  
ꢌꢈꢆ ꢉꢊs ꢋꢅꢁꢁ ꢍFꢎꢏ  
ꢀꢈꢁ ꢉꢊs ꢋꢂꢁꢁ ꢍFꢎꢏ  
ꢁꢈꢆ ꢉꢊs ꢋꢌꢁꢁ ꢍFꢎꢏ  
ꢌꢈꢁ ꢉꢊs ꢋꢀꢁꢁ ꢍFꢎꢏ  
ꢌꢈꢆ ꢉꢊs ꢋꢅꢁꢁ ꢍFꢎꢏ  
ꢀꢈꢁ ꢉꢊs ꢋꢂꢁꢁ ꢍFꢎꢏ  
ꢅꢆ  
ꢂꢁ  
ꢂꢆ  
ꢆꢁ  
ꢆꢆ  
ꢃꢁ  
ꢃꢆ  
ꢇꢁ  
ꢇꢆ  
ꢄꢁ  
ꢄꢆ  
ꢅꢆ  
ꢂꢁ  
ꢂꢆ  
ꢆꢁ  
ꢆꢆ  
ꢃꢁ  
ꢃꢆ  
ꢇꢁ  
ꢇꢆ  
ꢄꢁ  
ꢄꢆ  
ꢅmꢇꢈꢂꢃt ꢉꢂmpꢂraturꢂ ꢄꢊꢁꢆ  
ꢅmꢇꢈꢂꢃt ꢉꢂmpꢂraturꢂ ꢄꢊꢁꢆ  
Output Ripple and Noise (Vin=48V, Iout=0A, Ta=+25°C, Vout-ripple=43.3mV)  
Output Ripple and Noise (Vin=48V, Iout=30A, Ta=+25°C, Vout-ripple=45.6mv)  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 6 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
TYPICAL PERFORMANCE DATA, ULS-3.3/30-D48  
Enable startup Delay (Vin=48V, Vout=nom, Iout=30A, Cload=4700uF,  
Ta=+25°C) Trace2=Vout, Trace4=Enable  
Startup Delay (Vin=48V, Vout=nom, Iout=30A, Cload=4700uF, Ta=+25°C)  
Trace1=Vin, Trace2=Vout  
Step Load Transient Response (Vin=48V, Vout=nom, Iout=75ꢀ to 50ꢀ of full load,  
1A/uS at Ta=+25°C) +Delta=61mV, Recovery time=8.4uS  
Step Load Transient Response (Vin=48V, Vout=nom, Iout=50ꢀ to 75ꢀ of full load,  
1A/uS at Ta=+25°C) +Delta=64mV, Recovery time=7.6uS  
Step Load Transient Response (Vin=48V, Vout=nom, Iout=50ꢀ to 75ꢀ of full load,  
1A/uS at Ta=+25°C)  
Thermal image with hot spot at full load (30A) current with 30°C ambient; air is flowing at  
100 LFM. Air is flowing across the converter from Vin to Vout at 48V input. Identifiable and  
recommended maximum value to be verified in application. Hottest spot is Q4=88.9°C.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 7 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
Emissions Performance, Model ULS-3.3/30-D48  
Murata Power Solutions measures its products for radio frequency emissions  
against the EN 55022 and CISPR 22 standards. Passive resistance loads are  
employed and the output is set to the maximum voltage. If you set up your  
own emissions testing, make sure the output load is rated at continuous power  
while doing the tests.  
The recommended external input and output capacitors (if required) are  
included. Please refer to the fundamental switching frequency. All of this  
information is listed in the Product Specifications. An external discrete filter is  
installed and the circuit diagram is shown below.  
ꢍꢀꢀ  
ꢎꢏꢐ  
ꢂꢁ  
ꢊ
ꢊ
ꢀꢁ  
ꢀꢉ  
ꢀꢃ ꢀꢄ  
ꢇꢀꢈꢇꢀ  
ꢋꢅꢌꢍ  
ꢑꢐꢇ  
ꢀꢅ  
ꢀꢆ  
ꢑꢐꢇ  
Figure 3. Conducted Emissions Test Circuit  
Graph 1. Conducted emissions performance, Positive Line,  
CISPR 22, Class A, 48Vin, full load  
[1] Conducted Emissions Parts List  
[2] Conducted Emissions Test Equipment Used  
Hewlett Packard HP8594L Spectrum Analyzer –S/N 3827A00153  
2Line V-networks LS1-15V 50Ω/50Uh Line Impedance Stabilization Network  
[3] Conducted Emissions Test Results  
Reference  
C1  
Part Number  
GRM32ER-  
72A105KA01L  
Description  
SMD CERAMIC-100V-  
1000nF-X7R-1210  
SMD CERAMIC  
100V-100nF- 10ꢀ-  
X7R-1206  
Vendor  
Murata  
GRM-  
319R72A104KA01D  
C2  
Murata  
COMMON MODE-  
1320uH- 25ꢀ-4A-R5K-  
21*21*12.5mm  
High  
Light  
L1  
LB16H1324  
SMD CERAMIC  
1000V-0.022uF- 10ꢀ-  
X7R-1210  
GRM-  
32DR73A223KW01L  
C4, C5  
Murata  
Aluminum 100V-320Uf-  
10ꢀ-long lead  
C3  
C6  
UHE2A221MHD  
NA  
Nichicon  
Graph 2. Conducted emissions performance, Negative Line,  
CISPR 22, Class A, 48Vin, full load  
[4] Layout Recommendations  
Most applications can use the filtering which is already installed inside the  
converter or with the addition of the recommended external capacitors. For  
greater emissions suppression, consider additional filter components and/or  
shielding. Emissions performance will depend on the user’s PC board layout,  
the chassis shielding environment and choice of external components. Please  
refer to Application Note GEAN02 for further discussion.  
Contact Murata Power Solutions for Class B Emissions test circuit and con-  
ducted emissions performance test results.  
Since many factors affect both the amplitude and spectra of emissions, we  
recommend using an engineer who is experienced at emissions suppression.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 8 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
FUNCTIONAL SPECIFICATIONS, ULS-5/20-D48  
ABSOLUTE MAXIMUM RATINGS  
Input Voltage, Continuous  
Input Voltage, Transient  
Minimum  
Typical/Nominal  
Maximum  
80  
100  
Units  
Vdc  
Vdc  
Vdc  
Vdc  
Vdc  
W
Conditions ➀  
0
100 mS max. duration  
Input to output, continuous  
None, install external fuse  
Power on, referred to -Vin  
Isolation Voltage  
2250  
Input Reverse Polarity  
On/Off Remote Control  
Output Power  
None  
0
0
15  
101  
Current-limited, no damage, short-circuit  
protected  
Output Current  
0
20  
A
Storage Temperature Range  
Vin = Zero (no power)  
-55  
125  
°C  
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other  
than those listed in the Performance/Functional Specifications Table is not implied or recommended.  
INPUT  
Operating voltage range  
Recommended External Fuse  
Start-up threshold  
Undervoltage shutdown  
Overvoltage shutdown  
Reverse Polarity Protection  
Internal Filter Type  
36  
48  
75  
10  
35.5  
34  
Vdc  
A
Vdc  
Vdc  
Vdc  
Vdc  
Fast blow  
Rising input voltage  
Falling input voltage  
32.5  
31  
34.5  
32.5  
None  
None  
C
None, install external fuse  
Input current  
Full Load Conditions  
Low Line  
Inrush Transient  
Short Circuit Input Current  
No Load  
Shut-Down Input Current (Off)  
Reflected (back) ripple current ➁  
GENERAL and SAFETY  
Efficiency  
Vin = nominal  
Vin = minimum  
2.29  
3.05  
0.05  
50  
50  
15  
2.36  
3.15  
A
A
A2-Sec.  
mA  
100  
100  
18  
Iout = minimum, unit = ON  
mA  
mA  
mA, p-p  
Measured at input with specified filter  
15  
30  
Vin = 48V, full load  
Vin = min., full load  
89  
89  
91  
91  
ꢀ
ꢀ
Isolation  
Isolation Voltage  
Insulation Safety Rating  
Isolation Resistance  
Isolation Capacitance  
Input to output, continuous  
2250  
basic  
100  
Vdc  
MΩ  
pF  
3300  
Certified to UL-60950-1, CSA-C22.2 No.  
60950-1, IEC/EN60950-1, 2nd edition  
Per Telcordia SR332, issue 1, class 3, ground  
fixed, Tambient = +25°C  
Safety  
Yes  
2.6  
Hours x 106  
Calculated MTBF  
DYNAMIC CHARACTERISTICS  
Fixed Switching Frequency  
Startup Time  
470  
520  
570  
15  
20  
KHz  
mS  
mS  
Power on to Vout regulated  
Remote ON to Vout regulated  
50-75-50ꢀ load step, settling time to within  
1ꢀ of Vout  
Startup Time  
Dynamic Load Response  
10  
100  
240  
µSec  
mV  
Dynamic Load Peak Deviation  
FEATURES and OPTIONS  
Remote On/Off Control  
“N” suffix:  
same as above  
180  
Negative Logic, ON state  
Negative Logic, OFF state  
Control Current  
ON = Ground pin or external voltage  
OFF = Pin open or external voltage  
Open collector/drain  
-0.1  
2.5  
0.8  
15  
2
V
V
mA  
1
1
“P” suffix:  
Positive Logic, ON state  
Positive Logic, OFF state  
Control Current  
ON = Pin open or external voltage  
OFF = Ground pin or external voltage  
Open collector/drain  
3.5  
0
15  
1
2
V
V
mA  
SMT Mounting  
"M" suffix  
Sense pins connected externally to respective  
Vout pins  
Remote Sense  
10  
ꢀ
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 9 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
FUNCTIONAL SPECIFICATIONS, ULS-5/20-D48 (CONT.)  
OUTPUT  
Minimum  
Typical/Nominal  
Maximum  
Units  
Conditions ➀  
Total Output Power  
Voltage  
See Derating  
99  
100  
101  
W
Nominal Output Voltage  
Setting Accuracy  
Output Voltage Range  
Overvoltage Protection  
Current  
Output Current Range  
Minimum Load  
Current Limit Inception  
Short Circuit  
No trim  
At 50ꢀ load, no trim  
User-adjustable  
4.95  
-1  
-10  
5.6  
5
505  
1
10  
9
Vdc  
ꢀ of Vnom  
ꢀ of Vnom.  
Vdc  
Via magnetic feedback  
6.3  
20  
24  
0
20  
32  
A
A
98ꢀ of Vnom., after warmup  
22  
Hiccup technique, autorecovery within  
1.25ꢀ of Vout  
Short Circuit Current  
.6  
A
Short Circuit Duration  
(remove short for recovery)  
Short circuit protection method  
Regulation  
Output shorted to ground, no damage  
Current limiting  
Continuous  
Line Regulation  
Load Regulation  
Ripple and Noise  
Temperature Coefficient  
Maximum Capacitive Loading  
MECHANICAL (Through Hole Models)  
Outline Dimensions  
(Please refer to outline drawing)  
Weight  
Vin = min. to max., Vout = nom., Iout = nom.  
Iout = min. to max., Vin = 48V  
5 Hz- 20 MHz BW  
0.125  
0.125  
120  
ꢀ of Vout  
ꢀ of Vout  
mV pk-pk  
ꢀ of Vout./°C  
μF  
60  
0.02  
At all outputs  
Low ESR, resistive load only  
330  
3300  
1.3X0.9X0.4  
33X22.9X10.2  
0.58  
Inches  
mm  
Ounces  
Grams  
Inches  
mm  
LxWxH  
16.5  
Through Hole Pin Diameter  
0.04 & 0.06  
1.016X1.524  
Copper alloy  
50  
Through Hole Pin Material  
TH Pin Plating Metal and Thickness  
Nickel subplate  
Gold overplate  
µ-inches  
µ-inches  
5
ENVIRONMENTAL  
Operating Ambient Temperature Range  
Operating Case Temperature Range  
Storage Temperature  
Thermal Protection/Shutdown  
Electromagnetic Interference  
Conducted, EN55022/CISPR22  
Radiated, EN55022/CISPR22  
RoHS rating  
With Derating  
No derating  
Vin = Zero (no power)  
Measured in center  
External filter is required  
-40  
-40  
-55  
115  
85  
°C  
°C  
°C  
°C  
120  
125  
130  
125  
B
B
Class  
Class  
RoHS-6  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 10 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
TYPICAL PERFORMANCE DATA, ULS-5/20-D48  
Efficiency and Power Dissipation  
ꢇꢁ  
ꢇꢀ  
ꢇꢅ  
ꢃꢃ  
ꢃꢂ  
ꢃꢁ  
ꢃꢀ  
ꢃꢅ  
ꢆꢃ  
ꢆꢂ  
ꢆꢁ  
ꢀꢀ  
ꢀꢅ  
ꢄꢃ  
ꢄꢂ  
ꢄꢁ  
ꢄꢀ  
ꢄꢅ  
ꢃ
ꢈꢉꢊ ꢋ ꢆꢌꢈ  
ꢈꢉꢊ ꢋ ꢁꢃꢈ  
ꢈꢉꢊ ꢋ ꢍꢂꢈ  
ꢂ
ꢎoꢏer ꢐissiꢑatioꢒ  
ꢈꢉꢊ ꢋ ꢁꢃꢈ  
ꢁ
ꢀ
ꢆꢀ  
ꢀ
ꢅ
ꢁ
ꢂ
ꢃ
ꢄꢅ  
ꢄꢀ  
ꢄꢁ  
ꢄꢂ  
ꢄꢃ  
ꢀꢅ  
Iout (Amps)  
Maximum Current Temperature Derating at Sea Level  
Maximum Current Temperature Derating at Sea Level  
(Vin = 48V, airflow is from Vin- to Vin+)  
(Vin = 48V, airflow is from Vin to Vout)  
ꢁꢀ  
ꢁꢉ  
ꢀꢈ  
ꢀꢇ  
ꢀꢆ  
ꢀꢅ  
ꢀꢄ  
ꢀꢃ  
ꢀꢂ  
ꢀꢁ  
ꢁꢀ  
ꢁꢉ  
ꢀꢈ  
ꢀꢇ  
ꢀꢆ  
ꢀꢅ  
ꢀꢄ  
ꢀꢃ  
ꢀꢂ  
ꢀꢁ  
ꢉꢊꢁꢄ ꢋꢌs ꢍꢄꢉ ꢎFꢏꢐ  
ꢉꢊꢄ ꢋꢌs ꢍꢀꢉꢉ ꢎFꢏꢐ  
ꢀꢊꢉ ꢋꢌs ꢍꢁꢉꢉ ꢎFꢏꢐ  
ꢀꢊꢄ ꢋꢌs ꢍꢂꢉꢉ ꢎFꢏꢐ  
ꢁꢊꢉ ꢋꢌs ꢍꢃꢉꢉ ꢎFꢏꢐ  
ꢉꢊꢁꢄ ꢋꢌs ꢍꢄꢉ ꢎFꢏꢐ  
ꢉꢊꢄ ꢋꢌs ꢍꢀꢉꢉ ꢎFꢏꢐ  
ꢀꢊꢉ ꢋꢌs ꢍꢁꢉꢉ ꢎFꢏꢐ  
ꢀꢊꢄ ꢋꢌs ꢍꢂꢉꢉ ꢎFꢏꢐ  
ꢁꢊꢉ ꢋꢌs ꢍꢃꢉꢉ ꢎFꢏꢐ  
ꢂꢉ  
ꢂꢄ  
ꢃꢉ  
ꢃꢄ  
ꢄꢉ  
ꢄꢄ  
ꢅꢉ  
ꢅꢄ  
ꢆꢉ  
ꢆꢄ  
ꢇꢉ  
ꢇꢄ  
ꢂꢉ  
ꢂꢄ  
ꢃꢉ  
ꢃꢄ  
ꢄꢉ  
ꢄꢄ  
ꢅꢉ  
ꢅꢄ  
ꢆꢉ  
ꢆꢄ  
ꢇꢉ  
ꢇꢄ  
ꢅmꢇꢈꢂꢃt ꢉꢂmpꢂraturꢂ ꢄꢊꢁꢆ  
ꢅmꢇꢈꢂꢃt ꢉꢂmpꢂraturꢂ ꢄꢊꢁꢆ  
Output Ripple and noise (Vin = 48V, Vout = nom, Iout = 20A, Cload = 330uf, Ta = +25°C) Output Ripple and noise (Vin = 48V, Vout = nom, Iout = 0A, Cload = 330uF, Ta = +25°C)  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 11 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
TYPICAL PERFORMANCE DATA, ULS-5/20-D48  
Enable Startup Delay (Vin = 48V, Vout = nom, Iout = 20A, Cload = 330uF, Ta = +25°C)  
Ch2 = Vout, Ch4 = Enable.  
Vin Startup Delay (Vin = 48V, Vout = nom, Iout = 20A, Cload = 330uF, Ta = +25°C)  
Ch1 = Vin, Ch2 = Vout.  
Step Load Transient Response (Vin = 48V, Vout = nom, Iout = 75ꢀ-50ꢀ  
of full load, Ta = +25°C)  
Step Load Transient Response (Vin = 48V, Vout = nom, Iout = 50ꢀ-75ꢀ  
of full load, Ta = +25°C)  
Step Load Transient Response (Vin = 48V, Vout = nom, Iout = 50ꢀ-75ꢀ-50ꢀ  
of full load, Ta = +25°C)  
Thermal image with hot spot at full load (20A) current with 30°C ambient; air is flowing at  
100 LFM. Air is flowing across the converter from Vin to Vout at 48V input. Identifiable and  
recommended maximum value to be verified in application. Hottest spot is Q4 = 103.4°C.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 12 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
Emissions Performance, Model ULS-5/20-D48  
Murata Power Solutions measures its products for radio frequency emissions  
against the EN 55022 and CISPR 22 standards. Passive resistance loads are  
employed and the output is set to the maximum voltage. If you set up your  
own emissions testing, make sure the output load is rated at continuous power  
while doing the tests.  
The recommended external input and output capacitors (if required) are  
included. Please refer to the fundamental switching frequency. All of this  
information is listed in the Product Specifications. An external discrete filter is  
installed and the circuit diagram is shown below.  
ꢍꢀꢀ  
ꢎꢏꢐ  
ꢂꢁ  
ꢊ
ꢊ
ꢀꢁ  
ꢀꢉ  
ꢀꢃ ꢀꢄ  
ꢇꢀꢈꢇꢀ  
ꢋꢅꢌꢍ  
ꢑꢐꢇ  
ꢀꢅ  
ꢀꢆ  
ꢑꢐꢇ  
Figure 4. Conducted Emissions Test Circuit  
Graph 3. Conducted emissions performance, Positive Line,  
CISPR 22, Class A, 48Vin, full load  
[1] Conducted Emissions Parts List  
[2] Conducted Emissions Test Equipment Used  
Hewlett Packard HP8594L Spectrum Analyzer –S/N 3827A00153  
2Line V-networks LS1-15V 50Ω/50Uh Line Impedance Stabilization Network  
[3] Conducted Emissions Test Results  
Reference  
C1  
Part Number  
GRM32ER-  
72A105KA01L  
Description  
SMD CERAMIC-100V-  
1000nF-X7R-1210  
SMD CERAMIC  
100V-100nF- 10ꢀ-  
X7R-1206  
Vendor  
Murata  
GRM-  
319R72A104KA01D  
C2  
Murata  
COMMON MODE-  
1320uH- 25ꢀ-4A-R5K-  
21*21*12.5mm  
High  
Light  
L1  
LB16H1324  
SMD CERAMIC  
1000V-0.022uF- 10ꢀ-  
X7R-1210  
GRM-  
32DR73A223KW01L  
C4, C5  
Murata  
Aluminum 100V-320Uf-  
10ꢀ-long lead  
C3  
C6  
UHE2A221MHD  
NA  
Nichicon  
Graph 4. Conducted emissions performance, Negative Line,  
CISPR 22, Class A, 48Vin, full load  
[4] Layout Recommendations  
Most applications can use the filtering which is already installed inside the  
converter or with the addition of the recommended external capacitors. For  
greater emissions suppression, consider additional filter components and/or  
shielding. Emissions performance will depend on the user’s PC board layout,  
the chassis shielding environment and choice of external components. Please  
refer to Application Note GEAN02 for further discussion.  
Contact Murata Power Solutions for Class B Emissions test circuit and con-  
ducted emissions performance test results.  
Since many factors affect both the amplitude and spectra of emissions, we  
recommend using an engineer who is experienced at emissions suppression.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 13 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
FUNCTIONAL SPECIFICATIONS, ULS-6.5/15-D48  
ABSOLUTE MAXIMUM RATINGS  
Input Voltage, Continuous  
Input Voltage, Transient  
Isolation Voltage  
Input Reverse Polarity  
On/Off Remote Control  
Output Power  
Minimum  
Typical/Nominal  
Maximum  
80  
100  
Units  
Vdc  
Vdc  
Vdc  
Vdc  
Vdc  
W
Conditions ➀  
0
100 mS max. duration  
Input to output, continuous  
None, install external fuse  
Power on, referred to -Vin  
2250  
None  
0
0
15  
98.48  
Current-limited, no damage, short-circuit  
protected  
Output Current  
0
15  
A
Storage Temperature Range  
Vin = Zero (no power)  
-55  
125  
°C  
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other  
than those listed in the Performance/Functional Specifications Table is not implied or recommended.  
INPUT  
Operating voltage range  
Recommended External Fuse  
Start-up threshold  
Undervoltage shutdown  
Overvoltage shutdown  
Reverse Polarity Protection  
Internal Filter Type  
36  
48  
75  
10  
35.5  
34  
Vdc  
A
Vdc  
Vdc  
Vdc  
Vdc  
Fast blow  
Rising input voltage  
Falling input voltage  
32.5  
31  
34.5  
32.5  
None  
None  
C
None, install external fuse  
Input current  
Full Load Conditions  
Low Line  
Inrush Transient  
Short Circuit Input Current  
No Load  
Shut-Down Input Current (Off)  
Reflected (back) ripple current ➁  
GENERAL and SAFETY  
Efficiency  
Vin = nominal  
Vin = minimum  
2.18  
2.91  
0.05  
50  
41  
5
2.28  
3.05  
A
A
A2-Sec.  
mA  
100  
100  
10  
Iout = minimum, unit = ON  
mA  
mA  
mA, p-p  
Measured at input with specified filter  
15  
30  
Vin = 48V, full load  
Vin = min., full load  
90  
90  
93  
93  
ꢀ
ꢀ
Isolation  
Isolation Voltage  
Insulation Safety Rating  
Isolation Resistance  
Isolation Capacitance  
Input to output, continuous  
2250  
basic  
100  
Vdc  
MΩ  
pF  
3300  
Certified to UL-60950-1, CSA-C22.2 No.  
60950-1, IEC/EN60950-1, 2nd edition  
Per Telcordia SR332, issue 1, class 3, ground  
fixed, Tambient = +25°C  
Safety  
Yes  
2.6  
Hours x 106  
Calculated MTBF  
DYNAMIC CHARACTERISTICS  
Fixed Switching Frequency  
Startup Time  
250  
KHz  
mS  
mS  
Power on to Vout regulated  
Remote ON to Vout regulated  
50-60-50ꢀ load step, settling time to within  
1ꢀ of Vout  
30  
30  
Startup Time  
Dynamic Load Response  
100  
µSec  
mV  
Dynamic Load Peak Deviation  
FEATURES and OPTIONS  
Remote On/Off Control  
“N” suffix:  
same as above  
55  
Negative Logic, ON state  
Negative Logic, OFF state  
Control Current  
ON = Ground pin or external voltage  
OFF = Pin open or external voltage  
Open collector/drain  
-0.1  
2.5  
0.8  
15  
2
V
V
mA  
1
1
“P” suffix:  
Positive Logic, ON state  
Positive Logic, OFF state  
Control Current  
ON = Pin open or external voltage  
OFF = Ground pin or external voltage  
Open collector/drain  
3.5  
0
15  
1
2
V
V
mA  
SMT Mounting  
"M" suffix  
Sense pins connected externally to respective  
Vout pins  
Remote Sense  
10  
ꢀ
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 14 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
FUNCTIONAL SPECIFICATIONS, ULS-6.5/15-D48 (CONT.)  
OUTPUT  
Minimum  
Typical/Nominal  
Maximum  
Units  
Conditions ➀  
Total Output Power  
Voltage  
See Derating  
0
97.5  
98.48  
W
Nominal Output Voltage  
Setting Accuracy  
Output Voltage Range  
Overvoltage Protection  
Current  
Output Current Range  
Minimum Load  
Current Limit Inception  
Short Circuit  
No trim  
At 50ꢀ load, no trim  
User-adjustable  
6.435  
-1  
-10  
7.4  
6.5  
6.565  
1
10  
Vdc  
ꢀ of Vnom  
ꢀ of Vnom.  
Vdc  
Via magnetic feedback  
8.5  
15  
22  
10  
0
15  
25  
A
A
98ꢀ of Vnom., after warmup  
18  
Hiccup technique, autorecovery within  
1.25ꢀ of Vout  
Short Circuit Current  
.6  
A
Short Circuit Duration  
(remove short for recovery)  
Short circuit protection method  
Regulation  
Output shorted to ground, no damage  
Current limiting  
Continuous  
Line Regulation  
Load Regulation  
Ripple and Noise  
Temperature Coefficient  
Maximum Capacitive Loading  
MECHANICAL (Through Hole Models)  
Outline Dimensions  
(Please refer to outline drawing)  
Weight  
Vin = min. to max., Vout = nom., Iout = nom.  
Iout = min. to max., Vin = 48V  
5 Hz- 20 MHz BW  
0.125  
0.125  
120  
ꢀ of Vout  
ꢀ of Vout  
mV pk-pk  
ꢀ of Vout./°C  
μF  
60  
0.02  
At all outputs  
Low ESR, resistive load only  
330  
3300  
1.3x0.9x0.4  
33x22.9x10.2  
0.58  
Inches  
mm  
Ounces  
Grams  
Inches  
mm  
LxWxH  
16.5  
Through Hole Pin Diameter  
0.04 & 0.06  
1.016x1.524  
Copper alloy  
50  
Through Hole Pin Material  
TH Pin Plating Metal and Thickness  
Nickel subplate  
Gold overplate  
µ-inches  
µ-inches  
5
ENVIRONMENTAL  
Operating Ambient Temperature Range  
Operating Case Temperature Range  
Storage Temperature  
Thermal Protection/Shutdown  
Electromagnetic Interference  
Conducted, EN55022/CISPR22  
Radiated, EN55022/CISPR22  
RoHS rating  
With Derating  
No derating  
Vin = Zero (no power)  
Measured in center  
External filter is required  
-40  
-40  
-55  
115  
85  
°C  
°C  
°C  
°C  
120  
125  
130  
125  
B
B
Class  
Class  
RoHS-6  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 15 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
Functional Specification Notes  
➀
All specifications are typical unless noted. Ambient temperature =  
+25°Celsius, Vin is nominal, output current is maximum rated nominal.  
External output capacitance is 1 µF multilayer ceramic paralleled with  
10 µF electrolytic. All caps are low ESR. These capacitors are necessary for  
our test equipment and may not be needed in your application.  
Testing must be kept short enough that the converter does not appreciably  
heat up during testing. For extended testing, use plenty of airflow. See  
Derating Curves for temperature performance. All models are stable and  
regulate within spec without external cacacitance.  
➇
➈
Do not exceed maximum power ratings, Sense limits or output overvoltage  
when adjusting output trim values.  
At zero output current, Vout may contain components which slightly  
exceed the ripple and noise specifications.  
➉
ꢀꢀ  
Output overload protection is non-latching. When the output overload  
is removed, the output will automatically recover.  
All models are fully operational and meet published specifications,  
including “cold start” at –40°C.  
➁
➂
Input Ripple Current is tested and specified over a 5-20 MHz bandwidth  
and uses a special set of external filters only for the Ripple Current speci-  
fications. Input filtering is Cin = 33 µF, Cbus = 220 µF, Lbus = 12 µH. Use  
capacitor rated voltages which are twice the maximum expected voltage.  
Capacitors must accept high speed AC switching currents.  
ꢀꢁ  
The converter will shut off if the input falls below the undervoltage thresh-  
old. It will not restart until the input exceeds the Input Start Up Voltage.  
ꢀꢁ  
Short circuit shutdown begins when the output voltage degrades approxi-  
mately 2ꢀ from the selected setting.  
ꢀꢁ  
Output noise may be further reduced by installing an external filter. See  
the Application Notes. Use only as much output filtering as needed and no  
more. Larger caps (especially low-ESR ceramic types) may slow transient  
response or degrade dynamic performance. Thoroughly test your applica-  
tion with all components installed.  
Note that Maximum Current Derating Curves indicate an average current  
at nominal input voltage. At higher temperatures and/or lower airflow, the  
converter will tolerate brief full current outputs if the average RMS current  
over time does not exceed the Derating curve. All Derating curves are  
presented at sea level altitude. Be aware of reduced power dissipation  
with increasing density altitude.  
ꢀꢁ  
To avoid damage or unplanned shutdown, do not sink appreciable reverse  
output current.  
➃
➄
Mean Time Before Failure (MTBF) is calculated using the Telcordia  
(Belcore) SR-332 Method 1, Case 3, Issue 1, ground fixed conditions. Oper-  
ating temperature = +25°C, full output load, natural air convection.  
ꢀꢁ  
A fast blow fuse must be installed in series with +Vin to avoid damage to  
the converter in the event that the source voltage is accidentally applied to  
the converter with reverse polarity.  
The output may be shorted to ground indefinitely with no damage. The  
Output Short Circuit Current shown in the specifications is an average con-  
sisting of very short bursts of full rated current to test whether the output  
circuit can be repowered.  
ꢀꢁ  
Although extremely unlikely, failure of the internal components of this  
product may expose external application circuits to dangerous voltages,  
currents, temperatures or power levels. Please thoroughly verify all appli-  
cations before committing them to service. Be sure to include appropri-  
ately rated FUSES (see specifications and Application Notes) to reduce the  
risk of failure.  
➅
➆
The On/Off Control is normally driven from a switch or relay. An open  
collector/open drain transistor may be used in saturation and cut-off  
(pinch-off) modes. External logic may also be used if voltage levels are  
fully compliant to the specifications.  
ꢀꢁ  
If Sense is not wired to an external load, connect sense pins to their  
respective Vout pins. Do not leave sense unconnected.  
Regulation specifications describe the deviation as the input line voltage  
or output load current is varied from a nominal midpoint value to either  
extreme (50ꢀ load).  
ꢀꢁ  
The switching frequencies of these converters are fixed; see individual  
specifications for model details.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 16 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
TYPICAL PERFORMANCE DATA, ULS-6.5/15-D48  
Efficiency and Power Dissipation  
ꢅꢀꢀ  
ꢈꢆ  
ꢈꢀ  
ꢄꢆ  
ꢄꢀ  
ꢇꢆ  
ꢇꢀ  
ꢃꢆ  
ꢃꢀ  
ꢆꢆ  
ꢆꢀ  
ꢅꢄ  
ꢅꢃ  
ꢅꢂ  
ꢅꢁ  
ꢅꢀ  
ꢄ
ꢉiꢊ ꢋ ꢌꢃꢉ  
ꢉiꢊ ꢋ ꢂꢄꢉ  
ꢉiꢊ ꢋ ꢇꢆꢉ  
ꢍoꢎer ꢏissiꢐatioꢊ  
ꢑꢉiꢊ ꢋ ꢂꢄꢉꢒ  
ꢃ
ꢂ
ꢁ
ꢀ
ꢀ
ꢁ
ꢂ
ꢃ
ꢄ
ꢅꢀ  
ꢅꢁ  
ꢅꢂ  
ꢅꢃ  
Iout (Amps)  
Maximum Current Temperature Derating at Sea Level  
Maximum Current Temperature Derating at Sea Level  
(Vin = 48V, airflow is from Vin- to Vin+)  
(Vin = 48V, airflow is from Vin to Vout)  
ꢀꢆ  
ꢀꢅ  
ꢀꢄ  
ꢀꢃ  
ꢀꢂ  
ꢀꢀ  
ꢀꢁ  
ꢀꢆ  
ꢀꢅ  
ꢀꢄ  
ꢀꢃ  
ꢀꢂ  
ꢀꢀ  
ꢀꢁ  
ꢃꢉꢁꢊꢋsꢌꢆꢁꢁꢍFꢎꢏ  
ꢂꢉꢅꢊꢋsꢌꢅꢁꢁꢍFꢎꢏ  
ꢂꢉꢁꢊꢋsꢌꢄꢁꢁꢍFꢎꢏ  
ꢀꢉꢅꢊꢋsꢌꢃꢁꢁꢍFꢎꢏ  
ꢀꢉꢁꢊꢋsꢌꢂꢁꢁꢍFꢎꢏ  
ꢁꢉꢅꢊꢋsꢌꢀꢁꢁꢍFꢎꢏ  
ꢃꢉꢁꢊꢋsꢌꢆꢁꢁꢍFꢎꢏ  
ꢂꢉꢅꢊꢋsꢌꢅꢁꢁꢍFꢎꢏ  
ꢂꢉꢁꢊꢋsꢌꢄꢁꢁꢍFꢎꢏ  
ꢀꢉꢅꢊꢋsꢌꢃꢁꢁꢍFꢎꢏ  
ꢀꢉꢁꢊꢋsꢌꢂꢁꢁꢍFꢎꢏ  
ꢁꢉꢅꢊꢋsꢌꢀꢁꢁꢍFꢎꢏ  
ꢃꢅ  
ꢄꢁ  
ꢄꢅ  
ꢅꢁ  
ꢅꢅ  
ꢆꢁ  
ꢆꢅ  
ꢇꢁ  
ꢇꢅ  
ꢈꢁ  
ꢈꢅ  
ꢃꢅ  
ꢄꢁ  
ꢄꢅ  
ꢅꢁ  
ꢅꢅ  
ꢆꢁ  
ꢆꢅ  
ꢇꢁ  
ꢇꢅ  
ꢈꢁ  
ꢈꢅ  
ꢅmꢇꢈꢂꢃt ꢉꢂmpꢂraturꢂ ꢄꢊꢁꢆ  
ꢅmꢇꢈꢂꢃt ꢉꢂmpꢂraturꢂ ꢄꢊꢁꢆ  
Output ripple and Noise (Vin=48V, Iout=0, Ta=+25°C)  
Vout ripple=17.5mV  
Output ripple and Noise (Vin=48V, Iout=15A, Ta=+25°C)  
Vout ripple=23.8mV  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 17 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
TYPICAL PERFORMANCE DATA, ULS-6.5/15-D48  
Enable Startup Delay (Vin=48V, Iout=15A, Cload=3300uf, Ta=+25°C) Trace 2=Vout,  
Trace 4=Enable  
Startup Delay (Vin=48V, Iout=15A, Cload=3300uF, Ta=+25°C) Trace 1=Vin,  
Trace 2=Vout  
Step Load Transient Response (Vin=48V, Vout=nom, Iout= 75ꢀ to 50ꢀ of full load,  
1A/uS at Ta=+25°C) +Delta=67mV, Rocovery time=0uS  
Step Load Transient Response (Vin=48V, Vout=nom, Iout= 50ꢀ to 75ꢀ of full load,  
1A/uS at Ta=+25°C) +Delta=80mV, Rocovery time=10uS  
Step Load Transient Response (Vin=48V, Vout=nom, Iout= 50ꢀ to 75ꢀ of full load,  
1A/uS at Ta=+25°C)  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 18 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
Emissions Performance, Model ULS-6.5/15-D48  
[3] Conducted Emissions Test Results  
Murata Power Solutions measures its products for radio frequency emissions  
against the EN 55022 and CISPR 22 standards. Passive resistance loads are  
employed and the output is set to the maximum voltage. If you set up your  
own emissions testing, make sure the output load is rated at continuous power  
while doing the tests.  
The recommended external input and output capacitors (if required) are  
included. Please refer to the fundamental switching frequency. All of this  
information is listed in the Product Specifications. An external discrete filter is  
installed and the circuit diagram is shown below.  
ꢋꢄꢄ  
ꢌꢍꢎ  
ꢀꢆ  
ꢀꢅ  
ꢊ
ꢊ
ꢄꢆ ꢄꢅ ꢄꢓ  
ꢄꢐ ꢄꢔ  
ꢀꢁꢂꢃ  
ꢄꢇ ꢄꢈ  
ꢄꢆꢅ  
ꢃꢄꢉꢃꢄ  
ꢏꢐꢑꢋ  
ꢒꢎꢃ  
ꢄꢑ ꢄꢕ ꢄꢆꢖ ꢄꢆꢆ  
Graph 5. Conducted emissions performance, Positive Line,  
CISPR 22, Class A, 48Vin, full load  
ꢒꢎꢃ  
Figure 5. Conducted Emissions Test Circuit  
[1] Conducted Emissions Parts List  
Reference  
Part Number  
Description  
Vendor  
C1, C2,  
C3, C4, GRM32ER72A105KA01L SMD CERAMIC-100V-1000nF-X7R-1210 Murata  
C5  
SMD CERAMIC100V-100nF- 10ꢀ-  
C6  
GRM319R72A104KA01D  
PG0060T  
Murata  
Pulse  
X7R-1206  
L1, L2  
C8, C9,  
C10, C11  
C7  
COMMON MODE-473uH- 25ꢀ-14A  
SMD CERAMIC 630V-0.22uF- 10ꢀ-  
X7R-2220  
GRM55DR72J224KW01L  
Murata  
UHE2A221MHD  
NA  
Aluminum100V-220Uf- 10ꢀ-long lead Nichicon  
C12  
[2] Conducted Emissions Test Equipment Used  
Hewlett Packard HP8594L Spectrum Analyzer –S/N 3827A00153  
2Line V-networks LS1-15V 50Ω /50Uh Line Impedance Stabilization Network  
Graph 6. Conducted emissions performance, Negative Line,  
CISPR 22, Class A, 48Vin, full load  
[3] Layout Recommendations  
Most applications can use the filtering which is already installed inside the  
converter or with the addition of the recommended external capacitors. For  
greater emissions suppression, consider additional filter components and/or  
shielding. Emissions performance will depend on the user’s PC board layout,  
the chassis shielding environment and choice of external components. Please  
refer to Application Note GEAN-02 for further discussion.  
Since many factors affect both the amplitude and spectra of emissions, we  
recommend using an engineer who is experienced at emissions suppression.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 19 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
FUNCTIONAL SPECIFICATIONS, ULS-12/8.3-D48  
ABSOLUTE MAXIMUM RATINGS  
Input Voltage, Continuous  
Input Voltage, Transient  
Isolation Voltage  
Input Reverse Polarity  
On/Off Remote Control  
Output Power  
Minimum  
Typical/Nominal  
Maximum  
80  
100  
Units  
Vdc  
Vdc  
Vdc  
Vdc  
Vdc  
W
Conditions ➀  
0
100 mS max. duration  
Input to output, continuous  
None, install external fuse  
Power on, referred to -Vin  
2250  
None  
0
0
15  
100.6  
Current-limited, no damage, short-circuit  
protected  
Output Current  
0
8.3  
A
Storage Temperature Range  
Vin = Zero (no power)  
-55  
125  
°C  
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other  
than those listed in the Performance/Functional Specifications Table is not implied or recommended.  
INPUT  
Operating voltage range  
Recommended External Fuse  
Start-up threshold  
Undervoltage shutdown  
Overvoltage shutdown  
Reverse Polarity Protection  
Internal Filter Type  
36  
48  
75  
10  
35.5  
34  
Vdc  
A
Vdc  
Vdc  
Vdc  
Vdc  
Fast blow  
Rising input voltage  
Falling input voltage  
32.5  
31  
34.5  
32.5  
None  
None  
C
None, install external fuse  
Input current  
Full Load Conditions  
Low Line  
Inrush Transient  
Short Circuit Input Current  
No Load Input Current  
Shut-Down Input Current (Off)  
Reflected (back) ripple current ➁  
GENERAL and SAFETY  
Efficiency  
Vin = nominal  
Vin = minimum  
2.26  
3.01  
0.05  
.1  
50  
5
2.35  
3.14  
A
A
A2-Sec.  
mA  
100  
150  
10  
Iout = minimum, unit = ON  
mA  
mA  
mA, p-p  
Measured at input with specified filter  
15  
30  
Vin = 48V, full load  
Vin = min., full load  
89  
89  
92  
92  
ꢀ
ꢀ
Isolation  
Isolation Voltage  
Insulation Safety Rating  
Isolation Resistance  
Isolation Capacitance  
Input to output, continuous  
2250  
basic  
100  
Vdc  
MΩ  
pF  
3300  
Certified to UL-60950-1, CSA-C22.2 No.  
60950-1, IEC/EN60950-1, 2nd edition  
Per Telcordia SR332, issue 1, class 3, ground  
fixed, Tambient = +25°C  
Safety  
Yes  
2.6  
Hours x 106  
Calculated MTBF  
DYNAMIC CHARACTERISTICS  
Fixed Switching Frequency  
Startup Time  
470  
520  
570  
20  
20  
KHz  
mS  
mS  
Power on to Vout regulated  
Remote ON to Vout regulated  
50-75-50ꢀ load step, settling time to within  
1ꢀ of Vout  
Startup Time  
Dynamic Load Response  
100  
240  
µSec  
mV  
Dynamic Load Peak Deviation  
FEATURES and OPTIONS  
Remote On/Off Control  
“N” suffix:  
same as above  
180  
Negative Logic, ON state  
Negative Logic, OFF state  
Control Current  
ON = Ground pin or external voltage  
OFF = Pin open or external voltage  
Open collector/drain  
-0.1  
2.5  
0.8  
15  
2
V
V
mA  
1
1
“P” suffix:  
Positive Logic, ON state  
Positive Logic, OFF state  
Control Current  
ON = Pin open or external voltage  
OFF = Ground pin or external voltage  
Open collector/drain  
3.5  
0
15  
1
2
V
V
mA  
SMT Mounting  
"M" suffix  
Sense pins connected externally to respective  
Vout pins  
Remote Sense  
10  
ꢀ
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 20 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
FUNCTIONAL SPECIFICATIONS, ULS-12/8.3-D48 (CONT.)  
OUTPUT  
Minimum  
Typical/Nominal  
Maximum  
Units  
Conditions ➀  
Total Output Power  
Voltage  
See Derating  
98.6  
99.6  
100.6  
W
Nominal Output Voltage  
Setting Accuracy  
Output Voltage Range  
Overvoltage Protection  
Current  
Output Current Range  
Minimum Load  
Current Limit Inception  
Short Circuit  
No trim  
At 50ꢀ load, no trim  
User-adjustable  
11.88  
-1  
-10  
12  
12.12  
1
10  
Vdc  
ꢀ of Vnom  
ꢀ of Vnom.  
Vdc  
Via magnetic feedback, static OVP  
13.8  
14.5  
8.3  
15.8  
0
9
8.3  
A
A
98ꢀ of Vnom., after warmup  
10.5  
12.5  
Hiccup technique, autorecovery within  
1.25ꢀ of Vout  
Short Circuit Current  
0.6  
A
Short Circuit Duration  
(remove short for recovery)  
Short circuit protection method  
Regulation  
Output shorted to ground, no damage  
Current limiting  
Continuous  
Line Regulation  
Load Regulation  
Ripple and Noise  
Temperature Coefficient  
Maximum Capacitive Loading  
MECHANICAL (Through Hole Models)  
Outline Dimensions  
(Please refer to outline drawing)  
Weight  
Vin = min. to max., Vout = nom., Iout = nom.  
Iout = min. to max., Vin = 48V  
5 Hz- 20 MHz BW  
0.125  
0.25  
150  
ꢀ of Vout  
ꢀ of Vout  
mV pk-pk  
ꢀ of Vout./°C  
μF  
80  
0.02  
At all outputs  
Low ESR, resistive load only  
220  
3300  
1.3X0.9X0.4  
33X22.9X10.2  
0.56  
Inches  
mm  
Ounces  
Grams  
Inches  
mm  
LxWxH  
16  
Through Hole Pin Diameter  
0.04 & 0.06  
1.016X1.524  
Copper alloy  
50  
Through Hole Pin Material  
TH Pin Plating Metal and Thickness  
Nickel subplate  
Gold overplate  
µ-inches  
µ-inches  
5
ENVIRONMENTAL  
Operating Ambient Temperature Range  
Operating Case Temperature Range  
Storage Temperature  
Thermal Protection/Shutdown  
Electromagnetic Interference  
Conducted, EN55022/CISPR22  
Radiated, EN55022/CISPR22  
Relative humidity, non-condensing  
Altitude  
With Derating  
No derating  
Vin = Zero (no power)  
Measured in center  
External filter is required  
-40  
-40  
-55  
115  
85  
°C  
°C  
°C  
°C  
120  
125  
130  
125  
B
B
Class  
Class  
ꢀRH  
feet  
meters  
To +85°C  
must derate -1ꢀ/1000 feet  
10  
-500  
-152  
90  
10,000  
3048  
RoHS rating  
RoHS-6  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 21 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
Functional Specification Notes  
➀
All specifications are typical unless noted. Ambient temperature =  
+25°Celsius, Vin is nominal, output current is maximum rated nominal.  
External output capacitance is 1 µF multilayer ceramic paralleled with  
10 µF electrolytic. All caps are low ESR. These capacitors are necessary for  
our test equipment and may not be needed in your application.  
Testing must be kept short enough that the converter does not appreciably  
heat up during testing. For extended testing, use plenty of airflow. See  
Derating Curves for temperature performance. All models are stable and  
regulate within spec without external cacacitance.  
➇
➈
Do not exceed maximum power ratings, Sense limits or output overvoltage  
when adjusting output trim values.  
At zero output current, Vout may contain components which slightly  
exceed the ripple and noise specifications.  
➉
ꢀꢀ  
Output overload protection is non-latching. When the output overload  
is removed, the output will automatically recover.  
All models are fully operational and meet published specifications,  
including “cold start” at –40°C.  
➁
➂
Input Ripple Current is tested and specified over a 5-20 MHz bandwidth  
and uses a special set of external filters only for the Ripple Current speci-  
fications. Input filtering is Cin = 33 µF, Cbus = 220 µF, Lbus = 12 µH. Use  
capacitor rated voltages which are twice the maximum expected voltage.  
Capacitors must accept high speed AC switching currents.  
ꢀꢁ  
The converter will shut off if the input falls below the undervoltage thresh-  
old. It will not restart until the input exceeds the Input Start Up Voltage.  
ꢀꢁ  
Short circuit shutdown begins when the output voltage degrades approxi-  
mately 2ꢀ from the selected setting.  
ꢀꢁ  
Output noise may be further reduced by installing an external filter. See  
the Application Notes. Use only as much output filtering as needed and no  
more. Larger caps (especially low-ESR ceramic types) may slow transient  
response or degrade dynamic performance. Thoroughly test your applica-  
tion with all components installed.  
Note that Maximum Current Derating Curves indicate an average current  
at nominal input voltage. At higher temperatures and/or lower airflow, the  
converter will tolerate brief full current outputs if the average RMS current  
over time does not exceed the Derating curve. All Derating curves are  
presented at sea level altitude. Be aware of reduced power dissipation  
with increasing density altitude.  
ꢀꢁ  
To avoid damage or unplanned shutdown, do not sink appreciable reverse  
output current.  
➃
➄
Mean Time Before Failure (MTBF) is calculated using the Telcordia  
(Belcore) SR-332 Method 1, Case 3, Issue 1, ground fixed conditions. Oper-  
ating temperature = +25°C, full output load, natural air convection.  
ꢀꢁ  
A fast blow fuse must be installed in series with +Vin to avoid damage to  
the converter in the event that the source voltage is accidentally applied to  
the converter with reverse polarity.  
The output may be shorted to ground indefinitely with no damage. The  
Output Short Circuit Current shown in the specifications is an average con-  
sisting of very short bursts of full rated current to test whether the output  
circuit can be repowered.  
ꢀꢁ  
Although extremely unlikely, failure of the internal components of this  
product may expose external application circuits to dangerous voltages,  
currents, temperatures or power levels. Please thoroughly verify all appli-  
cations before committing them to service. Be sure to include appropri-  
ately rated FUSES (see specifications and Application Notes) to reduce the  
risk of failure.  
➅
➆
The On/Off Control is normally driven from a switch or relay. An open  
collector/open drain transistor may be used in saturation and cut-off  
(pinch-off) modes. External logic may also be used if voltage levels are  
fully compliant to the specifications.  
ꢀꢁ  
If Sense is not wired to an external load, connect sense pins to their  
respective Vout pins. Do not leave sense unconnected.  
Regulation specifications describe the deviation as the input line voltage  
or output load current is varied from a nominal midpoint value to either  
extreme (50ꢀ load).  
ꢀꢁ  
The switching frequencies of these converters are fixed; see individual  
specifications for model details.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 22 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
TYPICAL PERFORMANCE DATA, ULS-12/8.3-D48  
Efficiency and Power Dissipation  
ꢇꢃ  
ꢇꢁ  
ꢄꢄ  
ꢄꢂ  
ꢄꢀ  
ꢆꢃ  
ꢆꢁ  
ꢃꢄ  
ꢃꢂ  
ꢅꢄ  
ꢅꢃ  
ꢅꢂ  
ꢅꢁ  
ꢅꢀ  
ꢄ
ꢋꢌꢍ ꢎ ꢆꢊꢋ  
ꢋꢌꢍ ꢎ ꢂꢄꢋ  
ꢋꢌꢍ ꢎ ꢉꢃꢋ  
ꢃ
ꢂ
ꢏoꢐer ꢑissiꢒatioꢓ  
ꢋꢌꢍ ꢎ ꢂꢄꢋ  
ꢁ
ꢃꢀ  
ꢀ
ꢄꢈꢉ  
ꢀꢈꢄꢉ  
ꢅꢈꢃꢃ  
ꢁꢈꢂꢇ  
ꢉꢈꢉꢁ  
ꢂꢈꢅꢊ  
ꢂꢈꢇꢄ  
ꢊꢈꢄꢅ  
ꢃꢈꢃꢂ  
ꢆꢈꢂꢆ  
Iout (Amps)  
Maximum Current Temperature Derating at Sea Level  
Maximum Current Temperature Derating at Sea Level  
(Vin = 48V, airflow is from Vin- to Vin+)  
(Vin = 48V, airflow is from Vin to Vout)  
ꢃꢁꢃ  
ꢃꢁꢂ  
ꢅꢁꢃ  
ꢅꢁꢂ  
ꢄꢁꢃ  
ꢄꢁꢂ  
ꢀꢁꢃ  
ꢀꢁꢂ  
ꢃꢁꢃ  
ꢃꢁꢂ  
ꢅꢁꢃ  
ꢅꢁꢂ  
ꢄꢁꢃ  
ꢄꢁꢂ  
ꢀꢁꢃ  
ꢀꢁꢂ  
ꢆꢁꢈꢀ ꢉꢊs ꢋꢀꢆ ꢌFꢍꢎ  
ꢆꢁꢀ ꢉꢊs ꢋꢏꢆꢆ ꢌFꢍꢎ  
ꢏꢁꢆ ꢉꢊs ꢋꢈꢆꢆ ꢌFꢍꢎ  
ꢏꢁꢀ ꢉꢊs ꢋꢂꢆꢆ ꢌFꢍꢎ  
ꢈꢁꢆ ꢉꢊs ꢋꢇꢆꢆ ꢌFꢍꢎ  
ꢆꢁꢈꢀ ꢉꢊs ꢋꢀꢆ ꢌFꢍꢎ  
ꢆꢁꢀ ꢉꢊs ꢋꢏꢆꢆ ꢌFꢍꢎ  
ꢏꢁꢆ ꢉꢊs ꢋꢈꢆꢆ ꢌFꢍꢎ  
ꢏꢁꢀ ꢉꢊs ꢋꢂꢆꢆ ꢌFꢍꢎ  
ꢈꢁꢆ ꢉꢊs ꢋꢇꢆꢆ ꢌFꢍꢎ  
ꢂꢆ  
ꢂꢀ  
ꢇꢆ  
ꢇꢀ  
ꢀꢆ  
ꢀꢀ  
ꢄꢆ  
ꢄꢀ  
ꢅꢆ  
ꢅꢀ  
ꢃꢆ  
ꢃꢀ  
ꢂꢆ  
ꢂꢀ  
ꢇꢆ  
ꢇꢀ  
ꢀꢆ  
ꢀꢀ  
ꢄꢆ  
ꢄꢀ  
ꢅꢆ  
ꢅꢀ  
ꢃꢆ  
ꢃꢀ  
ꢅmꢇꢈꢂꢃt ꢉꢂmpꢂraturꢂ ꢄꢊꢁꢆ  
ꢅmꢇꢈꢂꢃt ꢉꢂmpꢂraturꢂ ꢄꢊꢁꢆ  
Output ripple and Noise (Vin=48V, Iout=0, Cload= 1uf || 10uF, Ta=+25°C)  
Vout ripple=61mV  
Output ripple and Noise (Vin=48V, Iout=8.3A, Cload= 1uf || 10uF, Ta=+25°C)  
Vout ripple=66mV  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 23 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
TYPICAL PERFORMANCE DATA, ULS-12/8.3-D48  
Enable Startup Delay (Vin=48V, Iout=8.3A, Cload=3300uf, Ta=+25°C) Trace 2=Vout,  
Trace 4=Enable  
Startup Delay (Vin=48V, Iout=8.3A, Cload=3300uF, Ta=+25°C) Trace 1=Vin,  
Trace 2=Vout  
Step Load Transient Response (Vin=48V, Vout=nom, Iout= 75ꢀ to 50ꢀ of full load,  
1A/uS at Ta=+25°C) +Delta=166mV, Rocovery time=11.8uS  
Step Load Transient Response (Vin=48V, Vout=nom, Iout= 50ꢀ to 75ꢀ of full load,  
1A/uS at Ta=+25°C) +Delta=172mV, Rocovery time=12uS  
Step Load Transient Response (Vin=48V, Vout=nom, Iout= 50ꢀ to 75ꢀ of full load,  
1A/uS at Ta=+25°C)  
Thermal image with hot spot at full load current (8.3A) with 30°C ambient; air is flowing at  
100 LFM. Air is flowing across the converter from Vin to Vout at 48V input. Identifiable and  
recommended maximum value to be verified in application. Hottest spot is Q4=86.2°C.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 24 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
Emissions Performance, Model ULS-12/8.3-D48  
[3] Conducted Emissions Test Results  
Murata Power Solutions measures its products for radio frequency emissions  
against the EN 55022 and CISPR 22 standards. Passive resistance loads are  
employed and the output is set to the maximum voltage. If you set up your  
own emissions testing, make sure the output load is rated at continuous power  
while doing the tests.  
The recommended external input and output capacitors (if required) are  
included. Please refer to the fundamental switching frequency. All of this  
information is listed in the Product Specifications. An external discrete filter is  
installed and the circuit diagram is shown below.  
ꢉꢅꢅ  
ꢊꢋꢌ  
ꢀꢄ  
ꢈ
ꢈ
ꢀꢁꢂꢃ  
ꢅꢄ  
ꢅꢒ ꢅꢑ  
ꢅꢇ  
ꢃꢅꢆꢃꢅ  
ꢍꢎꢏꢉ  
ꢐꢌꢃ  
ꢅꢎ  
ꢅꢓ  
Graph 5. Conducted emissions performance, Positive Line,  
CISPR 22, Class A, 48Vin, full load  
ꢐꢌꢃ  
Figure 5. Conducted Emissions Test Circuit  
[1] Conducted Emissions Parts List  
Reference  
Part Number  
Description  
Vendor  
SMD CERAMIC  
100V-1000nF-X7R-1210  
SMD CERAMIC  
C1  
GRM32ER72A105KA01L  
Murata  
C2  
L1  
GRM319R72A104KA01D  
LB16H1324  
Murata  
High  
100V-100nF- 10ꢀ-X7R-1206  
COMMON MODE  
1320uH- 25ꢀ-4A-R5K-21 *21*12.5mm Light  
SMD CERAMIC  
1000V-0.022uF- 10ꢀ-X7R-1210  
C4, C5 GRM32DR73A223KW01L  
Murata  
Aluminum  
100V-320Uf- 10ꢀ-long lead  
C3  
C6  
UHE2A221MHD  
NA  
Nichicon  
[2] Conducted Emissions Test Equipment Used  
Hewlett Packard HP8594L Spectrum Analyzer –S/N 3827A00153  
2Line V-networks LS1-15V 50Ω /50Uh Line Impedance Stabilization Network  
Graph 6. Conducted emissions performance, Negative Line,  
CISPR 22, Class A, 48Vin, full load  
[3] Layout Recommendations  
Most applications can use the filtering which is already installed inside the  
converter or with the addition of the recommended external capacitors. For  
greater emissions suppression, consider additional filter components and/or  
shielding. Emissions performance will depend on the user’s PC board layout,  
the chassis shielding environment and choice of external components. Please  
refer to Application Note GEAN-02 for further discussion.  
Since many factors affect both the amplitude and spectra of emissions, we  
recommend using an engineer who is experienced at emissions suppression.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 25 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
MECHANICAL SPECIFICATIONS, THROUGH-HOLE MOUNT  
ꢈꢃꢉ ꢌꢊꢁꢍ  
INPUT/OUTPUT CONNECTIONS  
ꢚ
ꢄ
ꢃ
Pin  
3
Function  
–Vin  
Pin  
4
Function  
–Vout  
ꢔ
ꢕ
5
–Sense  
Trim  
2
On/Off Control  
6
7
+Sense  
+Vout  
ꢙ
ꢗ
1
+Vin  
8
ꢓ
Important! Always connect the sense pins. If they  
are not connected to a remote load, wire each  
sense pin to its respective voltage output at the  
converter pins.  
ꢁꢅꢆ ꢌꢊꢁꢍ  
The 0.145-inch pin length is shown. Please refer to  
the part number structure for alternate pin lengths.  
Pin material: Copper alloy. Plating: Gold over nickel  
ꢏꢆꢑꢒ ꢢꢆꢒꢤ  
ꢂꢀꢂꢄꢂ ꢦiꢧiꢦuꢦ ꢨlearaꢧꢨe  
ꢩetꢪeeꢧ staꢧdoffs aꢧd  
ꢫigꢫest ꢨoꢦꢬoꢧeꢧt  
Please note that some competitive units may use  
different pin numbering or alternate outline views;  
however, all units are plugin-compatible.  
ꢎꢆꢇꢏ ꢄꢠꢓꢡꢙꢠꢔꢭ  
φꢂꢀꢂꢗꢂ ꢂꢀꢂꢂꢄꢟꢄꢀꢂꢄꢕ ꢂꢀꢂꢃꢙꢣ  
ꢎꢆꢇꢏ ꢗꢡꢚꢭ  
ꢄꢀꢄꢂꢂ ꢟꢃꢔꢀꢁꢣ  
φꢂꢀꢂꢕꢃ ꢂꢀꢂꢂꢄꢟꢄꢀꢙꢔꢙ ꢂꢀꢂꢃꢙꢣ  
It is recommended that no parts be placed beneath  
the converter  
ꢂꢀꢂꢔꢚ ꢂꢀꢂꢂꢙ ꢕꢮ  
ꢂꢀꢄꢂꢂ ꢂꢀꢂꢂꢙ ꢃꢮ  
ꢒꢃꢈꢈꢃꢄ ꢉꢊꢅ ꢌꢊꢁꢍ  
Dimensions are in inches (mm) shown for ref. only.  
ꢗ
ꢓ
ꢃ
ꢀhꢁrꢂ ꢃꢄꢅꢆꢇ ꢈroꢉꢇctꢁoꢄ  
ꢙ
ꢕ
ꢏtaꢧdard ꢬiꢧ leꢧgtꢫ ꢂꢀꢄꢚꢂ iꢧꢀ  
For ꢊꢃ ꢬiꢧ leꢧgtꢫ oꢬtioꢧ iꢧ ꢦodel ꢧoꢀꢡ  
ꢨut tꢫe ꢬiꢧ leꢧgtꢫ to ꢂꢀꢄꢗꢙ iꢧꢀ  
ꢔ
ꢚ
ꢄ
Tolerances (unless otherwise specified):  
.XX ꢀ.ꢀ0 (ꢀ.ꢁ)  
.XXX ꢀ.ꢀꢂꢀ (ꢀ.0ꢁ)  
Angles 02  
ꢄꢀꢓꢂ ꢟꢓꢓꢀꢂꢣ  
Components are shown for reference only  
and may vary between units.  
ꢀꢁꢂꢃꢄꢄꢁꢅꢆꢁꢆ ꢇꢃꢃꢈꢉꢀꢊꢅꢈ  
ꢋꢌꢊꢁꢍ ꢈꢎꢀꢃꢏꢐꢎ ꢂꢃꢅꢌꢁꢀꢈꢁꢀꢑ  
ꢈꢃꢉ ꢌꢊꢁꢍ  
Fꢆꢇꢆꢏꢐꢒꢑ ꢐꢍꢊꢒ ꢏꢆꢜꢒꢏ  
ꢝ ꢎꢆꢇꢏ ꢄꢠꢓꢡ ꢕꢡ ꢙꢡ ꢔ  
ꢟꢎꢒꢋ ꢆꢎꢛꢠꢑꢠꢃꢔꢙꢡ ꢊꢒꢢꢒꢊ ꢛꢣ  
ꢀꢂꢗꢚꢠꢀꢂꢕꢃ  
ꢟꢎꢋꢆꢣ  
ꢟꢏꢒꢛꢣ  
ꢄꢀꢄꢂꢂ  
ꢖꢃꢔꢀꢁꢗꢘ  
ꢓꢀꢚꢄ  
ꢀꢄꢙꢂ  
ꢚ
ꢄ
ꢃ
ꢄꢄꢀꢔ  
ꢀꢗꢕ  
ꢔꢀꢕꢃ  
ꢀꢓꢂꢂ  
ꢔ
ꢕ
ꢙ
ꢃꢃꢀꢁ  
ꢀꢁꢂ  
ꢛ
ꢛ
ꢊ
ꢊ
ꢔꢀꢕꢃ  
ꢀꢓꢂꢂ  
ꢓ
ꢗ
ꢓꢀꢚꢄ  
ꢀꢄꢙꢂ  
ꢄꢗꢀꢂ  
ꢀꢙꢙ  
ꢀꢄꢂꢂ ꢅꢆꢇ  
ꢈꢇꢇꢉꢊꢈꢋ ꢋꢆꢇꢌ  
Fꢍꢋ ꢈꢊꢊ ꢎꢆꢇ  
ꢏꢐꢍꢉꢊꢑꢒꢋꢏ  
ꢛ
ꢊ
ꢓꢓ  
Fꢆꢇꢆꢏꢐꢒꢑ ꢐꢍꢊꢒ ꢏꢆꢜꢒꢏ  
ꢝ ꢎꢆꢇꢏ ꢗ ꢞ ꢚ  
ꢟꢎꢒꢋ ꢆꢎꢛꢠꢑꢠꢃꢔꢙꢡ ꢊꢒꢢꢒꢊ ꢛꢣ  
ꢀꢂꢔꢂꢠꢀꢂꢚꢗ  
ꢄꢀꢓꢂ  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 26 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
SHIPPING TRAYS AND BOXES, THROUGH-HOLE MOUNT  
ꢐꢁtiꢑstatiꢃ foaꢒ  
ꢀorꢁer sꢂaꢃer  
ꢍ ꢃartoꢁs  
ꢂer ꢓoꢔ  
ꢖaꢃꢗ traꢘ is ꢏ ꢔ ꢕ uꢁits  
ꢉꢅꢍ uꢁits total ꢂer traꢘꢌ  
ꢄꢍꢕ uꢁits  
ꢂer ꢃartoꢁ  
ꢜaꢓel  
ꢍꢊꢎ uꢁits total ꢂer ꢓoꢔ  
ꢀorrugated  
ꢃardꢓoard ꢓoꢔ  
ꢐll ꢒaterials iꢁ ꢃoꢁtaꢃt ꢙitꢗ tꢗe uꢁits are aꢁtiꢑstatiꢃ ꢂroteꢃtiꢚeꢆ  
ꢛiꢒeꢁsioꢁs are iꢁ iꢁꢃꢗes ꢉꢒꢒꢌꢆ  
ꢜaꢓel  
SHIPPING TRAY DIMENSIONS  
ꢀaterialꢁ ꢂoꢃ deꢄsitꢅꢆ ꢇlosed ꢇell ꢈolꢅetꢉꢅleꢄe aꢄtiꢊstatiꢇ foaꢋ  
ꢗꢏꢕꢌ  
ꢒꢐꢓꢎꢏꢎꢎꢔ  
ꢎꢏꢕꢖ  
ꢒꢐꢐꢏꢎꢎꢔ  
ꢎꢏꢓꢗ  
ꢒꢘꢓꢏꢎꢎꢔ  
ꢌꢊꢍ ꢎꢏꢐꢑ  
ꢒꢑꢏꢓꢔ  
Dimensions are in milimeters.  
ꢀhꢁrꢂ ꢃꢄꢅꢆꢇ ꢈroꢉꢇctꢁoꢄ  
ꢚꢎꢏꢙꢘ  
ꢒꢕꢏꢎꢎꢔ  
Tolerances (unless otherwise specified):  
.XX ꢀ.ꢁ  
.XXX ꢀ.ꢂꢁ  
Angles ꢂ2  
ꢎꢏꢓꢘ  
ꢒꢘꢙꢏꢎꢎꢔ  
ꢘꢏꢙꢌ  
ꢒꢙꢌꢏꢎꢎꢔ  
ꢘꢏꢗꢖ  
ꢒꢓꢎꢏꢎꢎꢔ  
ꢎꢏꢙꢘ  
ꢒꢕꢏꢎꢎꢔ  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 27 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
MECHANICAL SPECIFICATIONS, SURFACE MOUNT (MSL RATING 3)  
INPUT/OUTPUT CONNECTIONS  
ꢋꢌꢍ ꢎꢌꢏꢐ ꢑꢌꢐꢒ  
Pin  
3
Function  
Pin  
4
Function  
–Vout  
ꢂꢂꢁꢀꢅ  
ꢆꢁꢂꢀ  
–Vin  
5
–Sense  
Trim  
2
On/Off Control  
6
7
+Sense  
+Vout  
1
+Vin  
8
Important! Always connect the sense pins. If they  
are not connected to a remote load, wire each  
sense pin to its respective voltage output at the  
converter pins.  
Pin material: Copper alloy. Plating: Gold over nickel  
Please note that some competitive units may use  
different pin numbering or alternate outline views;  
however, all units are plugin-compatible.  
ꢆꢁꢇꢃ  
ꢀꢁꢀꢄꢅ ꢊꢓ  
It is recommended that no parts be placed beneath  
the converter  
ꢅꢃꢁꢉꢈ  
ꢆꢁꢆꢀꢀ  
ꢖꢐꢗꢘꢔꢔꢐꢍꢏ ꢋꢗꢙ Fꢘꢘꢚꢋꢖꢌꢍꢚ  
ꢅꢃꢁꢉꢈ  
ꢆꢁꢆꢀꢀ  
ꢂꢁꢀꢇ  
ꢀꢁꢆꢅꢀ  
Dimensions are in inches (mm) shown for ref. only.  
ꢊ
ꢆ
ꢀhꢁrꢂ ꢃꢄꢅꢆꢇ ꢈroꢉꢇctꢁoꢄ  
ꢃ
ꢄ
ꢇ
ꢅ
ꢂ
ꢞꢍꢜꢐꢎꢎ ꢘꢚꢟꢐꢖꢒꢌꢎꢐ ꢎꢋꢐꢗꢌFꢌꢐꢏ  
ꢛꢜꢜ ꢏꢌꢔꢐꢍꢎꢌꢘꢍ ꢛꢖꢐ ꢌꢍ ꢌꢍꢗꢟꢐꢎꢠꢔꢌꢜꢌꢔꢐꢚꢐꢖꢡꢢ  
ꢛꢜꢜ ꢚꢘꢜꢐꢖꢛꢍꢗꢐꢎꢣ ꢤꢁꢤꢤiꢕ ꢥ ꢀꢁꢀꢅiꢕꢦꢤꢁꢤꢧꢧꢥ ꢀꢁꢇꢧꢧꢨꢢ  
ꢤꢁꢤꢤꢤiꢕ ꢥ ꢀꢁꢀꢆiꢕꢦꢤꢁꢤꢤꢧꢧ ꢥ ꢀꢁꢅꢇꢧꢧꢨ  
ꢗꢘꢔꢋꢘꢍꢐꢍꢚꢎ ꢒꢌꢜꢜ ꢑꢛꢖꢩ ꢙꢐꢚꢒꢐꢐꢍ ꢔꢘꢏꢐꢜꢎ  
ꢈ
Tolerances (unless otherwise specified):  
.XX ꢀ.ꢀ0 (ꢀ.ꢁ)  
.XXX ꢀ.ꢀꢂꢀ (ꢀ.0ꢁ)  
Angles 02  
ꢂꢈꢁꢀꢈ  
ꢆꢁꢂꢈ  
φꢀꢁꢀꢃ ꢔꢌꢍ ꢋꢛꢏ  
ꢄ ꢘꢖ ꢊ ꢋꢜꢛꢗꢐꢎ ꢛꢎ ꢖꢐꢝꢞꢌꢖꢐꢏ  
Components are shown for reference only  
and may vary between units.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 28 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
TAPE AND REEL INFORMATION  
Feed (Unwind)  
Direction ----  
[2.0]  
0.079  
6-8mm  
PICK-UP  
NOZZLE  
Pin #1  
Round  
Holes  
1.75  
.069  
[18.92]  
0.745  
44.00  
1.732  
32.00  
1.260  
PITCH  
Oblong  
Holes  
Top Cover Tape  
[9.65]  
.38 REF  
330.20  
13.00  
TAPE AND REEL  
(200 UNITS  
PER REEL)  
101.60  
4.00  
CORE  
13.00  
.512  
44.0  
1.73  
Dimensions are in inches (mm shown for ref. only).  
REF  
ꢀhꢁrꢂ ꢃꢄꢅꢆꢇ ꢈroꢉꢇctꢁoꢄ  
Tolerances (unless otherwise specified):  
.XX ꢀ.ꢀ0 (ꢀ.ꢁ)  
.XXX ꢀ.ꢀꢂꢀ (ꢀ.0ꢁ)  
Angles ꢂ1  
Components are shown for reference only.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 29 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
TECHNICAL NOTES  
Input Fusing  
Input Source Impedance  
Certain applications and/or safety agencies may require the installation of  
fuses at the inputs of power conversion components. Fuses should also be  
used if the possibility of sustained, non-current-limited, input-voltage polarity  
reversals exists. For DATEL ULS series DC-DC converters, we recommend the  
use of a fast blow fuse, installed in the ungrounded input supply line with a  
typical value about twice the maximum input current, calculated at low line  
with the converter’s minimum efficiency.  
The input of ULS converters must be driven from a low ac-impedance source.  
The DC-DC’s performance and stability can be compromised by the use of  
highly inductive source impedances. The input circuit shown in Figure 6 is a  
practical solution that can be used to minimize the effects of inductance in the  
input traces. For optimum performance, components should be mounted close  
to the DC-DC converter.  
I/O Filtering, Input Ripple Current, and Output Noise  
All relevant national and international safety standards and regulations must  
be observed by the installer. For system safety agency approvals, the convert-  
ers must be installed in compliance with the requirements of the end- use  
safety standard.  
All models in the ULS Series are tested/specified for input reflected ripple  
current and output noise using the specified external input/output components/  
circuits and layout as shown in the following two figures. External input capaci-  
tors (CIN in Figure 6) serve primarily as energy-storage elements, minimiz-  
ing line voltage variations caused by transient IR drops in conductors from  
backplane to the DC-DC. Input caps should be selected for bulk capacitance  
(at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The  
switching nature of DC-DC converters requires that dc voltage sources have  
low ac impedance as highly inductive source impedance can affect system sta-  
bility. In Figure 6, CBUS and LBUS simulate a typical dc voltage bus. Your specific  
system configuration may necessitate additional considerations.  
Input Reverse-Polarity Protection  
If the input voltage polarity is accidentally reversed, an internal diode will  
become forward biased and likely draw excessive current from the power  
source. If this source is not current limited or the circuit appropriately fused, it  
could cause permanent damage to the converter.  
Pre-Bias Protection  
TO  
For applications where a pre-bias potential can be present at the output of  
the power module it is recommended that either blocking diodes are added  
in series with the Vout power lines or, a preferred solution is to use an OR-ing  
FET controller like the LM5050-1 High-Side & LM5051 Low-Side OR-ing FET  
Controller from TI. Starting the module into a pre-bias condition can cause  
permanent damage to the module.  
CURRENT  
PROBE  
OSCILLOSCOPE  
+VIN  
LBUS  
+
VIN  
CBUS  
CIN  
–
Input Under-Voltage Shutdown and Start-Up Threshold  
–VIN  
Under normal start-up conditions, devices will not begin to regulate properly  
until the ramping-up input voltage exceeds the Start-Up Threshold Voltage.  
Once operating, devices will not turn off until the input voltage drops below the  
Under-Voltage Shutdown limit. Subsequent re-start will not occur until the input  
is brought back up to the Start-Up Threshold. This built in hysteresis prevents  
any unstable on/off situations from occurring at a single input voltage.  
C
IN = 33µF, ESR < 700mΩ @ 100kHz  
BUS = 220µF, ESR < 100mΩ @ 100kHz  
C
L
BUS = 12µH  
Figure 6. Measuring Input Ripple Current  
In critical applications, output ripple/noise (also referred to as periodic and  
random deviations or PARD) may be reduced below specified limits using filter-  
ing techniques, the simplest of which is the installation of additional external  
output capacitors. They function as true filter elements and should be selected  
for bulk capacitance, low ESR and appropriate frequency response.  
Start-Up Time  
The VIN to VOUT Start-Up Time is the time interval between the point at which  
the ramping input voltage crosses the Start-Up Threshold and the fully loaded  
output voltage enters and remains within its specified accuracy band. Actual  
measured times will vary with input source impedance, external input capaci-  
tance, and the slew rate and final value of the input voltage as it appears at the  
converter. The ULS Series implements a soft start circuit to limit the duty cycle  
of its PWM controller at power up, thereby limiting the input inrush current.  
+SENSE  
+VOUT  
RLOAD  
SCOPE  
C1  
C2  
The On/Off Control to VOUT start-up time assumes the converter has its  
nominal input voltage applied but is turned off via the On/Off Control pin. The  
specification defines the interval between the point at which the converter is  
turned on (released) and the fully loaded output voltage enters and remains  
within its specified accuracy band. Similar to the VIN to VOUT start-up, the On/Off  
Control to VOUT start-up time is also governed by the internal soft start circuitry  
and external load capacitance. The difference in start up time from VIN to VOUT  
and from On/Off Control to VOUT is therefore insignificant.  
–VOUT  
–SENSE  
C1 = 1µF  
C2 = 10µF  
LOAD 2-3 INCHES (51-76mm) FROM MODULE  
Figure 7. Measuring Output Ripple/Noise (PARD)  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 30 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
All external capacitors should have appropriate voltage ratings and be  
located as close to the converter as possible. Temperature variations for all  
relevant parameters should also be taken carefully into consideration. The most  
effective combination of external I/O capacitors will be a function of line volt-  
age and source impedance, as well as particular load and layout conditions.  
reduces the average output current, thereby preventing internal temperatures  
from rising to excessive levels. The ULS Series is capable of enduring an  
indefinite short circuit output condition.  
Remote Sense  
Note: The Sense and VOUT lines are internally connected through low-value  
resistors. Nevertheless, if the sense function is not used for remote regula-  
tion the user should connect the +Sense to +VOUT and –Sense to –VOUT at the  
DC-DC converter pins. ULS series converters employ a sense feature to provide  
point of use regulation, thereby overcoming moderate IR drops in PCB conduc-  
tors or cabling. The remote sense lines carry very little current and therefore  
require minimal cross-sectional-area conductors. The sense lines, which are  
capacitively coupled to their respective output lines, are used by the feedback  
control-loop to regulate the output. As such, they are not low impedance points  
and must be treated with care in layouts and cabling. Sense lines on a PCB  
should be run adjacent to dc signals, preferably ground.  
Floating Outputs  
Since these are isolated DC-DC converters, their outputs are “floating” with  
respect to their input. Designers will normally use the –Output as the ground/  
return of the load circuit. You can however, use the +Output as ground/return to  
effectively reverse the output polarity.  
Minimum Output Loading Requirements  
ULS converters employ a synchronous-rectifier design topology and all models  
regulate within spec and are stable under no-load to full load conditions.  
Operation under no-load conditions however might slightly increase the output  
ripple and noise.  
[VOUT(+)-VOUT(–)] – [Sense(+)-Sense(–)] ≤ 10ꢀVOUT  
Thermal Shutdown  
In cables and discrete wiring applications, twisted pair or other techniques  
should be used. Output over-voltage protection is monitored at the output volt-  
age pin, not the Sense pin. Therefore, excessive voltage differences between  
VOUT and Sense in conjunction with trim adjustment of the output voltage can  
cause the over-voltage protection circuitry to activate (see Performance Speci-  
fications for over-voltage limits). Power derating is based on maximum output  
current and voltage at the converter’s output pins. Use of trim and sense func-  
tions can cause output voltages to increase, thereby increasing output power  
beyond the converter’s specified rating, or cause output voltages to climb into  
the output over-voltage region. Therefore, the designer must ensure:  
The ULS converters are equipped with thermal-shutdown circuitry. If environ-  
mental conditions cause the temperature of the DC-DC converter to rise above  
the designed operating temperature, a precision temperature sensor will power  
down the unit. When the internal temperature decreases below the threshold  
of the temperature sensor, the unit will self start. See Performance/Functional  
Specifications.  
Output Over-Voltage Protection  
The ULS output voltage is monitored for an over-voltage condition using a com-  
parator. The signal is optically coupled to the primary side and if the output volt-  
age rises to a level which could be damaging to the load, the sensing circuitry  
will power down the PWM controller causing the output voltage to decrease.  
Following a time-out period the PWM will restart, causing the output voltage  
to ramp to its appropriate value. If the fault condition persists, and the output  
voltage again climbs to excessive levels, the over-voltage circuitry will initiate  
another shutdown cycle. This on/off cycling is referred to as “hiccup” mode.  
(VOUT at pins) x (IOUT) ≤ rated output power  
Contact and PCB resistance  
losses due to IR drops  
+VOUT  
+VIN  
IOUT  
+SENSE  
Current Limiting  
Sense Current  
As soon as the output current increases to approximately 130ꢀ of its rated  
value, the DC-DC converter will go into a current-limiting mode. In this condi-  
tion, the output voltage will decrease proportionately with increases in output  
current, thereby maintaining somewhat constant power dissipation. This is  
commonly referred to as power limiting. Current limit inception is defined  
as the point at which the full-power output voltage falls below the specified  
tolerance. See Performance/Functional Specifications. If the load current, being  
drawn from the converter, is significant enough, the unit will go into a short  
circuit condition as described below.  
ON/OFF  
CONTROL  
TRIM  
–SENSE  
–VOUT  
LOAD  
Sense Return  
IOUT Return  
–VIN  
Contact and PCB resistance  
losses due to IR drops  
Figure 8. Remote Sense Circuit Configuration  
On/Off Control  
Short Circuit Condition  
The input-side, remote On/Off Control function can be ordered to operate with  
either logic type:  
When a converter is in current-limit mode, the output voltage will drop as the  
output current demand increases. If the output voltage drops too low, the mag-  
netically coupled voltage used to develop primary side voltages will also drop,  
thereby shutting down the PWM controller. Following a time-out period, the  
PWM will restart causing the output voltage to begin ramping to their appropri-  
ate value. If the short-circuit condition persists, another shutdown cycle will be  
initiated. This on/off cycling is referred to as “hiccup” mode. The hiccup cycling  
Positive ("P" suffix) logic models are enabled when the on/off pin is left  
open (or is pulled high, applying +3.5V to +15V with respect to –Input) as per  
Figure 9. Positive-logic devices are disabled when the on/off pin is pulled low  
(0 to 1V with respect to –Input).  
Negative (“N” suffix) logic devices are off when pin is left open (or pulled  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 31 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
high, applying +2.5V to +15V), and on when pin is pulled low (–0.1 to +0.8V)  
with respect to –Input as shown in Figure 9.  
+VIN  
+Vcc  
Dynamic control of the remote on/off function is best accomplished with a  
mechanical relay or an open-collector/open-drain drive circuit (optically isolated  
if appropriate). The drive circuit should be able to sink appropriate current (see  
Performance Specifications) when activated and withstand appropriate voltage  
when deactivated. Applying an external voltage to pin 2 when no input power is  
applied to the converter can cause permanent damage to the converter.  
13V CIRCUIT  
ON/OFF  
CONTROL  
5V CIRCUIT  
–VIN  
Figure 9. Driving the Negative Logic On/Off Control Pin  
(simplified circuit)  
OUTPUT VOLTAGE ADJUSTMENT  
ꢁrꢂm ꢅꢆuatꢂoꢄs  
ꢁrꢂm ꢃowꢄ  
5.11  
+VOUT  
+VIN  
RT DOWN (kΩ) =  
ꢀ 10.22  
+SENSE  
∆
VOUT – VNOM  
VNOM  
Where ∆ = |  
|
ON/OFF  
CONTROL  
TRIM  
–SENSE  
–VOUT  
LOAD  
RTRIM UP  
ꢁrꢂm ꢇp  
5.11 × VNOM x (1 + ∆)  
1.225 × ∆  
5.11  
∆
ꢀ 10.22  
ꢀ
RT UP (kΩ) =  
Where ∆ = |  
–VIN  
VOUT – VNOM  
|
Figure 10. Trim Connections To Increase Output Voltages  
VNOM  
Connect sense to its respective Vout pin if sense is not used with a remote load.  
ꢈotꢉꢊ “∆” is always a positive value.  
“VNOM” is the nominal, rated output voltage.  
“VOUT” is the desired, changed output voltage.  
+VOUT  
+VIN  
+SENSE  
RTRIM DOWN  
ON/OFF  
CONTROL  
TRIM  
–SENSE  
–VOUT  
LOAD  
–VIN  
Figure 11. Trim Connections To Decrease Output Voltages  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 32 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
Through-hole Soldering Guidelines  
SMT Reflow Soldering Guidelines  
Murata Power Solutions recommends the TH soldering specifications below when install-  
ing these converters. These specifications vary depending on the solder type. Exceeding  
The surface-mount reflow solder profile shown below is suitable for SAC305 type lead-  
free solders. This graph should be used only as a guideline. Many other factors influence  
these specifications may cause damage to the product. Your production environment may the success of SMT reflow soldering. Since your production environment may differ,  
please thoroughly review these guidelines with your process engineers.  
differ; therefore please thoroughly review these guidelines with your process engineers.  
Wave Solder Operations for through-hole mounted  
products (THMT)  
For Sn/Ag/Cu based solders:  
Maximum Preheat Temperature  
Maximum Pot Temperature  
Maximum Solder Dwell Time  
For Sn/Pb based solders:  
Maximum Preheat Temperature  
Maximum Pot Temperature  
Maximum Solder Dwell Time  
115° C.  
270° C.  
7 seconds  
105° C.  
250° C.  
6 seconds  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 33 of 34  
ULS 100-Watt Series  
Sixteenth-brick DOSA-Compatible,  
Isolated DC-DC Converters  
Vertical Wind Tunnel  
Murata Power Solutions employs a computer controlled  
custom-designed closed loop vertical wind tunnel, infrared  
video camera system, and test instrumentation for accurate  
airflow and heat dissipation analysis of power products.  
The system includes a precision low flow-rate anemometer,  
variable speed fan, power supply input and load controls,  
temperature gauges, and adjustable heating element.  
IR Transparent  
optical window  
Variable  
speed fan  
Unit under  
test (UUT)  
The IR camera monitors the thermal performance of the  
Unit Under Test (UUT) under static steady-state conditions. A  
special optical port is used which is transparent to infrared  
wavelengths.  
IR Video  
Camera  
Both through-hole and surface mount converters are  
soldered down to a host carrier board for realistic heat  
absorption and spreading. Both longitudinal and transverse  
airflow studies are possible by rotation of this carrier board  
since there are often significant differences in the heat  
dissipation in the two airflow directions. The combination of  
adjustable airflow, adjustable ambient heat, and adjustable  
Input/Output currents and voltages mean that a very wide  
range of measurement conditions can be studied.  
Heating  
element  
Precision  
low-rate  
anemometer  
3” below UUT  
The collimator reduces the amount of turbulence adjacent  
to the UUT by minimizing airflow turbulence. Such turbu-  
lence influences the effective heat transfer characteristics  
and gives false readings. Excess turbulence removes more  
heat from some surfaces and less heat from others, possibly  
causing uneven overheating.  
Ambient  
temperature  
sensor  
Airflow  
collimator  
Both sides of the UUT are studied since there are different  
thermal gradients on each side. The adjustable heating element  
and fan, built-in temperature gauges, and no-contact IR camera mean  
that power supplies are tested in real-world conditions.  
Figure 12. Vertical Wind Tunnel  
This product is subject to the following operating requirements  
and the Life and Safety Critical Application Sales Policy:  
Refer to: http://www.murata-ps.com/requirements/  
Murata Power Solutions, Inc.  
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.  
ISO 9001 and 14001 REGISTERED  
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other  
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply  
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without  
notice.  
© 2017 Murata Power Solutions, Inc.  
www.murata-ps.com/support  
SDC_ULS-100 Series.B01.D8 Page 34 of 34  

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