DC/DC Converter
URB1D_LMD-15WR3 & URB1D_LMD-20WR3 Series
2018.09.30-A/3 Page 1 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
15 & 20W isolated DC-DC converter with Ultra-wide
Input and Regulated Single Output
CB Patent Protection RoHS
FEATURES
Ultra-wide 4:1 input voltage range
Reinforced I/O isolation test voltage 2.25k VDC
Operating ambient temperature range -40℃to
+85℃
Input under-voltage protection, output short
circuit, over-current, over–voltage protection
Low output ripple & noise
CLSPR32/EN55032 CLASS A EMI compliant
without external components
EN50155/EN60950/UL62368/IEC62368 Approval
Input Reverse Polarity Protection available with
Chassis (A2S) or 35mm DIN-Rail mounting (A4S)
version
Industry standard pin-out
URB1D_LMD-15WR3 15W and URB1D_LMD-20WR3 20W series of isolated DC-DC converter products have an ultra-wide 4:1 input voltage and
feature efficiencies of up to 86%. input to output isolation is tested with 2250VDC and the converters safely operate in an ambient
temperature of -40℃to +85℃and are offered with various mounting options ideally suiting electronic equipment and railway vehicle
applications using 72V, 96V and 110V battery voltages. The modules are fully featured, protected and include remote On/Off and Trim
function for output voltage adjustment.
Selection Guide
Certification
Part No. ①
Input Voltage (VDC)
Full Load
Efficiency③(%)
Min./Typ.
Capacitive
Load(µF)
Max.
Nominal
(Range)
Max.②
Voltage (VDC)
Current(mA)
Max./Min.
CE
URB1D03LMD-15WR3
110
(40-160)
170
3.3
4000/0
80/82
5400
CE
URB1D05LMD-15WR3
5
3000/0
82/84
5400
UL/CE/CB
URB1D12LMD-15WR3
12
1250/0
82/84
1000
CE
URB1D15LMD-15WR3
15
1000/0
83/85
820
UL/CE/CB
URB1D24LMD-15WR3
24
625/0
83/85
270
CE
URB1D03LMD-20WR3
3.3
5000/0
80/82
10000
CE
URB1D05LMD-20WR3
5
4000/0
82/84
10000
CE
URB1D12LMD-20WR3
12
1667/0
83/85
1600
CE
URB1D15LMD-20WR3
15
1333/0
84/86
1000
CE
URB1D24LMD-20WR3
24
833/0
84/86
470
Note:
①Use “H” suffix for heat sink mounting, “A2S” suffix for chassis mounting and “A4S” suffix for DIN-Rail mounting. We recommend to choose modules with a
heat sink for enhanced heat dissipation and applications with extreme temperature requirements;
②Absolute maximum stress rating without damage (not recommended);
③Efficiency is measured at nominal input voltage and rated output load; efficiencies for A2S and A4S Model’s is decreased by 2% due to the input reverse
polarity protection circuit.
DC/DC Converter
URB1D_LMD-15WR3 & URB1D_LMD-20WR3 Series
2018.09.30-A/3 Page 2 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
Input Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Input Current
(full load / no-load)
URB1D_LMD-15WR3 series,
Nominal input voltage
3.3V output
--
147/10
150/20
mA
5V output
--
163/10
167/20
Others
--
159/3
166/8
URB1D_LMD-20WR3 series,
Nominal input voltage
3.3V output
--
183/10
188/20
5V output
--
217/10
222/20
Others
--
214/3
219/8
Reflected Ripple Current
Nominal input voltage
--
25
--
mA
Surge Voltage (1sec. max.)
-0.7
--
180
VDC
Start-up Voltage
100% load
--
--
40
Shut-down Voltage
28
33
--
Start-up Time
Nominal input voltage & constant resistance load
--
10
--
ms
Input Filter
Pi filter
Hot Plug
Unavailable
Ctrl*
Module on
Ctrl pin open or pulled high (3.5-12VDC)
Module off
Ctrl pin pulled low to GND (0-1.2VDC)
Input current when off
--
2
7
mA
Note: *The Ctrl pin voltage is referenced to input GND.
Output Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Voltage Accuracy
0%-100% load
--
±1
±3
%
Linear Regulation
Input voltage variation from low to high at full load
--
±0.2
±0.5
Load Regulation
0%-100% load
--
±0.5
±1
Transient Recovery Time
25% load step change,
nominal input voltage
--
300
500
µs
Transient Response Deviation
3.3V/5V output
--
±3
±8
%
Others
--
±3
±5
Temperature Coefficient
Full load
--
±0.02
±0.03
%/℃
Ripple & Noise *
20MHz bandwidth, 5%-100% load
--
50
100
mV p-p
Trim
90
--
110
%Vo
Over-voltage Protection
Input voltage range
110
--
160
Over-current Protection
120
--
210
%Io
Short-circuit Protection
Continuous, self-recovery
Note: *The “parallel cable” method is used for Ripple and Noise test, please refer to DC-DC Converter Application Notes for specific information. Ripple & Noise
at＜5% load is 5%Vo max.
General Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Isolation
Input-output Electric Strength Test for 1 minute
with a leakage current of 1mA max.
2250
--
--
VDC
Input/output-case Electric Strength Test for 1
minute with a leakage current of 1mA max.
1600
--
--
Insulation Resistance
Input-output resistance at 500VDC
1000
--
--
MΩ
Isolation Capacitance
Input-output capacitance at 100KHz/0.1V
--
2200
--
pF
Operating Temperature
See Fig. 1
-40
--
+85
℃
Storage Temperature
-55
--
+125
Storage Humidity
Non-condensing
5
--
95
%RH
Pin Soldering Resistance
Temperature
Soldering spot is 1.5mm away from case for 10
seconds
--
--
300
℃
DC/DC Converter
URB1D_LMD-15WR3 & URB1D_LMD-20WR3 Series
2018.09.30-A/3 Page 3 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
Switching Frequency*
PWM mode
--
300
--
KHz
Shock & Vibration test
IEC61373 - Category 1, Grade B
MTBF
MIL-HDBK-217F@25℃
1000
--
--
K hours
Note: *Switching frequency is measured at full load. The module reduces the switching frequency for light load (below 50%) efficiency improvement.
Mechanical Specifications
Case Material
Aluminum alloy
Dimensions
Without heat sink
Horizontal package
50.80 × 25.40 × 11.80mm
A2S chassis mounting
76.00 × 31.50 × 21.20 mm
A4S Din-rail mounting
76.00 × 31.50 × 25.80 mm
Dimensions
With heat sink
Horizontal package
51.40 × 26.20 × 16.50mm
A2S chassis mounting
76.00 × 31.50 × 25.30 mm
A4S Din-rail mounting
76.00 × 31.50 × 29.90 mm
Weight
Without heat sink
Horizontal package/A2S chassis mounting/A4S Din-rail
mounting
26.0g/48.0g/68.0g(Typ.)
With heat sink
Horizontal package/A2S chassis mounting/A4S Din-rail
mounting
34.0g/56.0g/76.0g(Typ.)
Cooling Method
Free air convection
Electromagnetic compatibility (EMC) (EN60950)
Emissions
CE
CISPR32/EN55032
CLASS A(see Fig.3 for recommended circuit)/
CLASS B(see Fig.5-②for recommended circuit)
RE
CISPR32/EN55032
CLASS A(without external components)/
CLASS B (see Fig.5-②for recommended circuit)
Immunity
ESD
IEC/EN61000-4-2 Contact ±6KV/Air ±8KV
perf. Criteria B
RS
IEC/EN61000-4-3 10V/m
perf. Criteria A
EFT
IEC/EN61000-4-4 ±4KV (see Fig.4 or Fig.5-①for recommended circuit)
perf. Criteria B
Surge
IEC/EN61000-4-5
line to line ±2KV (2Ω18uF see Fig.4 for recommended circuit)
line to ground ±4KV (12Ω9uF see Fig.4 for recommended circuit)
perf. Criteria B
EN50121-3-2
line to line ±1KV (42Ω0.5uF see Fig.5-①for recommended circuit)
line to ground ±2KV (42Ω0.5uF see Fig.5-①for recommended circuit)
perf. Criteria B
CS
IEC/EN61000-4-6 10 Vr.m.s
perf. Criteria A
Electromagnetic Compatibility (EMC) (EN50155)
Emissions
CE
EN50121-3-2 150kHz-500kHz 99dBuV
EN55016-2-1 500kHz-30MHz 93dBuV
RE
EN50121-3-2 30MHz-230MHz 40dBuV/m at 10m
EN55016-2-1 230MHz-1GHz 47dBuV/m at 10m
Immunity
ESD
EN50121-3-2 Contact ±6KV/Air ±8KV
perf. Criteria B
RS
EN50121-3-2 20V/m
perf. Criteria A
EFT
EN50121-3-2 ±2kV 5/50ns 5kHz
perf. Criteria A
Surge
EN50121-3-2 line to line ±1KV（42Ω, 0.5μF）
line to ground ±2KV（42Ω, 0.5μF）
perf. Criteria B
CS
EN50121-3-2 0.15MHz-80MHz 10 Vr.m.s
perf. Criteria A
Note: All the tests are measured under the conditions of inputs capacitor 100uF/200V or FC-CX1D filter (the recommended circuit please see Fig.3 or see Fig.4).
DC/DC Converter
URB1D_LMD-15WR3 & URB1D_LMD-20WR3 Series
2018.09.30-A/3 Page 4 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
Typical Characteristic Curves
Without heatsink
With heatsi nk
Operating Te mperature( )
℃
Temperature Derating Curve
Output Powe r Percentage(% )
-40 0 40 85 120
80
60
100
120
40
20
065 71
Safe O per ating A rea
Operating Temperature, Except
URB1D03/05LMD-20W(H)R3(A2S/A4S)
Temperature De rating Cur ve
-40 0 40 71 85
0
20
40
60
80
100
120
Operating Tempe rature ( )
℃
Output Power Percen tage( %)
65
With heatsink
40V Vi n 120V Wit hou t h eatsin k
≤ ≤
120V Vin 160 V Without heatsink
＜ ≤
Safe Operating A rea
URB1D03LMD-20W(H)R3(A2S/A4S) Operating Temperature
Temperature De rating Curve
Safe Operating A rea
-4 0 0 6 5 8 5
0
20
40
60
80
100
120
Operating Temperatu re( )
℃
Output Power Pe rce ntage(%)
5 5 6 0 7 0
①
②
③
④
①
40 Vin 66V Without heatsink
＜
V
≤
②40V Vin 66V With heatsin k
≤ ＜
③120V Vin 160 V Wit hout h eatsin k
＜ ≤
④120V＜Vin 160 V With heatsink
≤
Temperature Derating Cu rve
Sa fe Op erating A rea
-40 0 40 71 85
0
20
40
60
80
100
120
Operating Te mpe rature ( )
℃
Output Power Pe rcen tage (%)
65
①
②
①
②
66 120V Vin V
≤ ≤ Wit hout heatsink
66 120V Vin V
≤ ≤ Wit h heat sink
URB1D05LMD-20W(H)R3(A2S/A4S) Operating Temperature
Fig. 1
DC/DC Converter
URB1D_LMD-15WR3 & URB1D_LMD-20WR3 Series
2018.09.30-A/3 Page 5 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
Design Reference
1. Typical application
All the DC-DC converters of this series are tested before delivery using the recommended circuit shown in Fig. 2.
Input and/or output ripple can be further reduced by appropriately increasing the input & output capacitor values Cin and Cout and/or by
selecting capacitors with a low ESR (equivalent series resistance). Also make sure that the capacitance is not exceeding the max.
capacitive load value of the product.
DC DC
Vin
G ND
+ Vo
0V
Cin Cout
Fuse
Fig. 2
Vout(VDC)
Fuse
Cin
Cout
3.3/5
2A,slow blow
10µF - 47µF
470µF
12/15
220µF
24
100µF
2. EMC compliance circuit
DC DC
Vin
GND
+Vo
0V
Cin Cou t
Fig. 3
Notes: Fig. 3 Cin please use the 250V withstand voltage of the capacitor.
Fig. 3 List of components：
Cin
27uF -100µF/250V
Cout
Refer to the Cout in Fig.2
+V in
-Vi n FC -CX1 D DC- DC
+Vo
0V
FUSE
+
C0
CY 1
CY 2
Vi n
GND
C2
C1 LOAD
Fig. 4
Fig. 4 List of components：
FUSE
Choose according to actual input current
FC-CX1D
FC-CX1D is the EMC auxiliary component of our
company. Input voltage range: 40V-160V
C0
100µF/200V
C1
Refer to the Cin in Fig.2
C2
Refer to the Cout in Fig.2
CY1、CY2
1000pF/400VAC
Vin
GND
+Vo
0V
DC/DC LOAD
LCM
②
C2
①
+Vin CY3
CY4
C4
CY1
CY2
LCM1 2
C3
+
C0 C1
-Vin
Fig. 5
Notes: Part ①in the Fig. 5 is used for EMS test and part ②for EMI test
Fig. 5 List of components：
Model
URB1D_LMD-15WR3
URB1D_LMD-20WR3
C0
100µF/200V
C1、C2
0.22µF/250V
C3
Refer to the Cin in Fig.2
LCM1
15mH
(UU common mode inductance)
2.2mH(FL2D-10-222)
LCM2
15mH
(UU common mode inductance)
0.53mH
(material：TN150P-RH12.7*12.7*7.9)
CY1、CY2、
CY3、CY4
1000pF/400VAC
C4
Refer to the Cout in Fig.2
Notes: FL2D-10-222 for MORNSUM EMC auxiliary device
DC/DC Converter
URB1D_LMD-15WR3 & URB1D_LMD-20WR3 Series
2018.09.30-A/3 Page 6 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
3. Trim Function for Output Voltage Adjustment (open if unused)
0V
R2
R1
R3
Vref
RT
Trim
+Vot
0V
R2
R1
R3
Vref
RT
Trim
+Vot
Trim up Trim down
TRIM resistor connection (dashed line shows internal resistor network)
Calculating Trim resistor values:
up: a= Vref
Vo’-Vref R1
R =TaR2
R -a2-R3
down: a= Vref
Vo’-Vref R2
R =TaR1
R -a1-R3
RT= Trim Resistor value;
a = self-defined parameter
Vo’= desired output voltage
Vout(V)
R1(KΩ)
R2(KΩ)
R3(KΩ)
Vref(V)
3.3
4.801
2.87
10
1.24
5
2.883
2.87
10
2.5
12
11.000
2.87
15
2.5
15
14.384
2.87
15
2.5
24
24.872
2.87
17.8
2.5
4. The products do not support parallel connection of their output
5. For additional information please refer to DC-DC converter application notes on
www.mornsun-power.com
Horizontal Package (without heat sink) Dimensions and Recommended Layout
DC/DC Converter
URB1D_LMD-15WR3 & URB1D_LMD-20WR3 Series
2018.09.30-A/3 Page 7 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
Horizontal Package (with heatsink) Dimensions
URB1D_LMD-15WR3A2S & URB1D_LMD-20WR3A2S (without heatsink) Dimensions
DC/DC Converter
URB1D_LMD-15WR3 & URB1D_LMD-20WR3 Series
2018.09.30-A/3 Page 8 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
URB1D_LMD-15WHR3A2S & URB1D_LMD-20WHR3A2S (with heatsink) Dimensions
URB1D_LMD-15WR3A4S & URB1D_LMD-20WR3A4S (without heatsink) Dimensions
DC/DC Converter
URB1D_LMD-15WR3 & URB1D_LMD-20WR3 Series
2018.09.30-A/3 Page 9 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
URB1D_LMD-15WHR3A4S & URB1D_LMD-20WHR3A4S (with heatsink) Dimensions
Note:
1. For additional information on Product Packaging please refer to www.mornsun-power.com. The Packaging bag number of Horizontal
packaging: 58200035(without heat sink), 58200051(with heat sink), A2S/ A4S packaging number: 58220022;
2. The maximum capacitive load offered were tested at input voltage range and full load;
3. Unless otherwise specified, parameters in this datasheet were measured under the conditions of Ta=25℃, humidity<75%RH with nominal
input voltage and rated output load;
4. All index testing methods in this datasheet are based on Company’s corporate standards;
5. Other product application information, please see DC-DC（railway power supply）Converter Application Notes for specific operation
methods;
6. We can provide product customization service, please contact our technicians directly for specific information;
7. Products are related to laws and regulations: see "Features" and "EMC";
8. Our products shall be classified according to ISO14001 and related environmental laws and regulations, and shall be handled by
qualified units.
Mornsun Guangzhou Science & Technology Co., Ltd.
Address: No. 5, Kehui St. 1, Kehui Development Center, Science Ave., Guangzhou Science City, Luogang District, Guangzhou, P. R. China
Tel: 86-20-38601850 Fax: 86-20-38601272 E-mail: sales@mornsun.cn www.mornsun-power.com