NME Series
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Isolated 1W Single Output DC-DC Converters
200
83
200
111
83
67
42
200
83
200
83
67
200
67
200
83
67
286
256
286
260
256
250
248
117
104
117
104
111
58
51
58
52
51
NME0505SPC
NME0505DPC
5
5
5
5
12 14 16 40
69
6.5 7.5 50 65
78
12 14 16 40
69
8
9
60 75
77
6.5 7.5 50 65
78
6 7.5 10 25
80
5.5 7.5 140 180
80
8
10 12 30
69
4
5
8
20
76
8
10 12 30
69
4
5
50 65
76
3
4
40 55
75
8.5 10
150
70
2.5 3
150
80
8.5 10
150
70
3
4
150
80
2.5 3
150
80
Short Circuit Protection Options
200 255 9.5 12 11 25 75 77
200 255 9.5 12 11 25 75 77
NME0509DC
NME0515DC
NME0524DC
NME1209DC
NME1215DC
NME1209SC
NME1515SC
NME2409DC
NME2412DC
NME2409SC
5
5
5
12
12
12
15
24
24
24
9
15
24
9
15
9
15
9
12
9
111
67
42
111
67
111
67
111
83
111
MIL. Tel.
kHrs
Recommended
Alternative
5
12
5
9
12
15
24
5
12
5
12
15
5
15
5
12
15
pF
Package Style
5
5
5
5
5
5
5
12
12
12
12
12
24
24
24
24
24
%
MTTF1
NME0505DC
NME0512DC
NME0505SC
NME0509SC
NME0512SC
NME0515SC
NME0524SC
NME1205DC
NME1212DC
NME1205SC
NME1212SC
NME1215SC
NME2405DC
NME2415DC
NME2405SC
NME2412SC
NME2415SC
%
mV p-p
Typ. Max. Typ. Max.
Isolation Capacitance
mA
Efficiency (Typ)
Input Current at
Rated Load
mA
Efficiency (Min)
Output Current
V
Ripple & Noise
Output Voltage
V
Order Code
Load Regulation2
Nominal Input Voltage
SELECTION GUIDE
FEATURES
n Short circuit protection options
n UL 60950 recognised
n Single isolated output
n 1kVDC isolation ‘Hi Pot Test’
n Wide temperature performance at full
1 watt load, –40°C to 85°C2
n Industry standard pinout
n 5V, 12V & 24V inputs
n 5V, 9V, 12V, 15V & 24V outputs
n Fully encapsulated with toroidal magnetics
n No external components required
n Pin compatible with CME, CRE1, CRL2,
LME, MEE1, MEE3, NKE & NML
DESCRIPTION
The NME series of DC-DC Converters is particularly suited to isolating and/or converting DC power
rails. The galvanic isolation allows the device to be
configured to provide an isolated negative rail in
systems where only positive rails exist. The wide
temperature range guarantees startup from –40°C
and full 1 watt output at 85°C2. For lower ripple,
refer to output ripple reduction section. The NME
series offers short circuit protection options (PC)
across the operating temperature range. Short
circuits of less than 1Ω cause the converter to enter a ‘foldback’ limiting mode such that the input
current is approximately 95mA for 0505 variant.
Protection is continuous and auto-resetting on
removal of the short circuit.
For full details go to
https://www.murata.com/englobal/products/power/rohs
260
250
248
115
110
115
81
54
52
54
8
6
5.5
5
3
5
2.5
4
3
4
9
60 75
7.5 10 25
7.5 140 180
5.5 60 75
4
40 55
5.5 60 75
3
150
5
150
4
150
5
150
77
80
80
74
75
74
82
75
80
75
30
33
30
37
33
40
48
33
55
33
55
52
40
79
40
78
79
3415
2205
3415
3078
2205
1532
2493
1780
2493
1780
1313
201
136
201
163
136
DIP
SIP
DIP
SIP
DIP
SIP
22 2887 47047 SIP
22 2887 47047 DIP
37
40
48
48
52
48
3078
1532
2311
1313
2311
59
78
59
185
163
185
DIP
SIP
DIP
SIP
NKE0509SC
NKE0515SC
Contact Murata
MEE1S1209DC
Contact Murata
NKE1209SC
MEE1S1515SC
Contact Murata
Contact Murata
MEE1S2409SC
1. Calculated using MIL-HDBK-217 FN2 and Telcordia SR-332 calculation model with nominal input voltage at full load.
2. NME1515SC, NME24XXXC prior to date code X1635 have operating temperature range of 0 to 70°C .
3. Excludes 24V input types.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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KDC_NME.M01 Page 1 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
INPUT CHARACTERISTICS
Parameter
Voltage range
Input short circuit current
Input Reflected ripple
current
Conditions
Min.
Typ.
Max.
Units
Continuous operation, 5V input types
Continuous operation, 12V input types
Continuous operation, 15V input types
Continuous operation, 24V input types
Short circuit variants
Short circuit variants
15V input type
NME2405xC
NME2412xC
NME2415xC
All other variants
4.5
10.8
13.5
21.6
5.0
12.0
15
24
95
3
5.5
13.2
16.5
26.4
V
mA
14
13
10
26
15
90
16
13
11
48
mA p-p
Typ.
Max.
Units
GENERAL CHARACTERISTICS
Parameter
Conditions
Switching frequency
5V input types
12V input types
15V input types
24V input types
Short circuit types
Min.
110
145
100
100
91
kHz
OUTPUT CHARACTERISTICS
Parameter
Conditions
Rated Power
Voltage Set Point Accuracy
See derating curves
See tolerance envelope
High VIN to low VIN ; All short circuit types
High VIN to low VIN ; All other output types
Line regulation
Min.
Typ.
Max.
Units
1.0
W
1.15
1.0
1.2
1.2
%/%
Typ.
Max.
Units
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation test voltage
Resistance
Flash tested for 1 second
Viso= 1000VDC
1000
VDC
GΩ
10
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Specification
Storage
All output types1, See safety approval section for UL temperature specification
-40
-50
Non-short circuit types
Case Temperature above ambient
Cooling
Typ.
85
130
41
32
5V output types
All other output types2
Short circuit types (DIP)
Short circuit types (SIP)
Free air convection
Max.
Units
°C
23
24
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds
260°C
Wave Solder
Wave Solder profile not to exceed the profile recommended in IEC 61760-1 Section 6.1.3. Please refer
to application notes for further information.
Input voltage VIN, NME05 types
Input voltage VIN, NME12 types
Input voltage VIN, NME15 types
Input voltage VIN, NME24 types
7V
15V
18V
28V
1. NME1515SC, NME24XXXC prior to date code X1635 have operating temperature range of 0 to 70°C .
2. Excludes 24V input types.
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KDC_NME.M01 Page 2 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test voltage,
applied for a specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NME series of DC-DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The NME has been recognised by Underwriters Laboratory for functional insulation, both input and output should normally be maintained within SELV limits i.e. less than 42.4V
peak, or 60VDC. The isolation test voltage represents a measure of immunity to transient voltages and the part should never be used as an element of a safety isolation system.
The part could be expected to function correctly with several hundred volts offset applied continuously across the isolation barrier; but then the circuitry on both sides of the barrier
must be regarded as operating at an unsafe voltage and further isolation/insulation systems must form a barrier between these circuits and any user-accessible circuitry according
to safety standard requirements.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials,
construction and environment. The NME series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enamelled wire. While
parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insulation. Any material, including this enamel (typically
polyurethane) is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. We
therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be reduced by 20% from specified test voltage.
This consideration equally applies to agency recognised parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further
insulation system of physical spacing or barriers.
SAFETY APPROVAL
The NME series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum ambient temperature of 85ºC and/or case temperature
limit of 100ºC. Case temperature measured on the face opposite the pins.
The NME Series of converters are not internally fused so to meet the requirements of UL 60950 an anti-surge input line fuse should always be used with ratings as defined below.
NME05xxxxC: 0.5A
NME12xxxxC: 0.25A
NME15xxxxC: 0.2A
NME24xxxxC: 0.12A
All fuses should be UL recognised and rated at 125V.
File number E151252 applies.
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260°C for 10 seconds. Please
refer to application notes for further information. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped
over Matte Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this series are backward
compatible with Sn/Pb soldering systems.
PART NUMBER STRUCTURE
NME XX XX X X C
Series name
Input voltage
Output voltage
RoHS compliant
Protections
P - short circuit
protection
Package type
S - SIP
D - DIP
M - Surface mount
Z - ZIP
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KDC_NME.M01 Page 3 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
CHARACTERISATION TEST METHODS
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1
1µF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC-DC converter
10µF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC-DC converter with an ESR of less
C2
than 100mΩ at 100 kHz
C3
100nF multilayer ceramic capacitor, general purpose
R1
450Ω resistor, carbon film, ±1% tolerance
R2
50Ω BNC termination
T1
3T of the coax cable through a ferrite toroid
RLOAD
Resistive load to the maximum power rating of the DC-DC converter. Connections should be made via twisted wires
Measured values are multiplied by 10 to obtain the specified values.
Differential Mode Noise Test Schematic
DC/DC Converter
C1 C2 C3
+
SUPPLY
Input
-
+
R1
T1
R2
OSCILLOSCOPE
Y INPUT
Output
-
R LOAD
APPLICATION NOTES
Minimum load
The minimum load to meet datasheet specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading will result in
an increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 5%.
Capacitive loading and start up
Typical start up times for this series, with a typical input voltage rise time of 2.2µs and output capacitance of 10µF, are shown in the table below. The product
series will start into a capacitance of 47µF with an increased start time, however, the maximum recommended output capacitance is 10µF.
NME0505XC
NME0509XC
NME0512XC
NME0515XC
NME0524XC
NME1205XC
NME1209XC
NME1212XC
NME1215XC
NME1515SC
NME2405XC
NME2409XC
NME2412XC
NME2415XC
NME0505XPC
Start-up time
µs
991
3524
5630
7750
19850
682
2102
4030
6193
685
135
260
430
640
350
Typical Start-Up Wave Form
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KDC_NME.M01 Page 4 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
APPLICATION NOTES (Continued)
Output Ripple Reduction
By using the values of inductance and capacitance stated, the output ripple at the rated load is lowered to 5mV p-p max.
Component selection
Capacitor: It is required that the ESR (Equivalent Series Resistance) should be as low as possible, ceramic types are recommended.
The voltage rating should be at least twice (except for 15V output), the rated output voltage of the DC-DC converter.
Inductor: The rated current of the inductor should not be less than that of the output of the DC-DC converter. At the rated current, the DC resistance of the inductor
should be such that the voltage drop across the inductor is 20MHz.
L
DC
Power
Source
NME0505XC
NME0509XC
NME0512XC
NME0515XC
NME0524XC
NME1205XC
NME1209XC
NME1212XC
NME1215XC
NME1515SC
NME2405XC
NME2409XC
NME2412XC
NME2415XC
NME0505XPC
C
Load
DC
L, µH
47
47
68
100
100
100
47
68
100
Inductor
SMD
82473C
82473C
82683C
82104C
82104C
82104C
82473C
82683C
82104C
Through Hole
11R473C
11R473C
11R683C
11R104C
11R104C
11R104C
11R473C
11R683C
11R104C
Capacitor
C, µF
4.7uF
1uF
1uF
0.47uF
0.47
4.7uF
1uF
0.47uF
0.47uF
22
82223C
11R223C
1uF
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KDC_NME.M01 Page 5 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
TOLERANCE ENVELOPES
The voltage tolerance envelope shows typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to
changes in output loading.
5V, 12V, 15V & 24V Input types
Short circuit
10%
9%
Output Voltage
Load L
4%
ine
2.5%
Output Voltage
Typica
l
5%
0%
-2.5%
0%
-6%
-7.5%
10
25
50
100
75
10
25
50
100
75
Output Load Current (%)
Output Load Current (%)
TEMPERATURE DERATING GRAPH
Non-short circuit types1:
Short circuit types:
1.0
0.5
1.5
85°C
Safe Operating Area
120°C
0
-40
100
50
0
Ambient Temperature (°C)
150
Output Power (W)
Output Power (W)
1.5
1.0
0.5
0
-40
85°C
Safe Operating Area
100
50
0
Ambient Temperature (°C)
150
1. NME1515SC, NME24XXXC prior to date code X1635 have operating temperature range of 0 to 70°C .
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KDC_NME.M01 Page 6 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
EFFICIENCY VS LOAD
5V & Short circuit input variants
12V Inputs
90
90
80
80
70
70
NME0505XC
NME0509XC
50
NME0512XC
NME0515XC
40
NME0524XC
NME0505XPC
30
60
Efficiency (%)
Efficiency (%)
60
20
10
10
20
30
40
50
60
70
80
90
0
100
NME1215XC
0
20
30
40
50
60
Load (%)
15V Inputs
24V Inputs
70
80
90
100
90
80
70
70
60
60
50
NME1515SC
40
Efficiency (%)
80
20
20
10
10
0
10
20
30
40
50
Load (%)
60
70
80
90
100
NME2409XC
NME2412XC
40
30
0
NME2405XC
50
30
0
10
Load (%)
90
Efficiency (%)
NME1212XC
30
10
0
NME1209XC
40
20
0
NME1205XC
50
NME2415XC
0
10
20
30
40
50
60
70
80
90
100
Load (%)
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KDC_NME.M01 Page 7 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
EMC FILTERING AND SPECTRA
FILTERING
The following table shows the additional input capacitor and input inductor typically required to meet EN 55022 Curve B Quasi-Peak EMC limit, as shown in the following
plots. The following plots show positive and negative quasi peak and CISPR22 Average Limit B (pink line) and Quasi Peak Limit B (green line) adherence limits.
L
DC
C
DC
C
Ceramic capacitor
Inductor
SMD
Capacitor
Inductor
Part Number
L, µH
Through Hole
C, µF
Part Number
NME0505XC
NME0509XC
NME0512XC
NME0515XC
NME0524XC
NME1205XC
NME1209XC
NME1212XC
4.7
13R472C
4.7
4.7
13R472C
4.7
10
13R103C
1
NME1215XC
NME1515SC
NME2405XC
NME2409XC
NME2412XC
NME2415XC
NME0505XPC
10
13R103C
1
L, µH
Through Hole
C, µF
22
13R223C
10
22
13R223C
10
13R103C
1
10
SMD
Capacitor
82103C
NME0505XC
NME0509XC
NME0512XC
NME0515XC
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KDC_NME.M01 Page 8 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
EMC FILTERING AND SPECTRA (Continued)
NME0524XC
NME0505XPC
80
70
60
dBuV
50
40
30
20
10
0
1.00E+05
1.00E+06
1.00E+07
1.00E+08
Frequency (Hz)
NME1205XC
NME1209XC
NME1212XC
NME1215XC
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KDC_NME.M01 Page 9 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
EMC FILTERING AND SPECTRA (Continued)
NME1515SC
NME2405XC
NME2409XC
NME2412XC
NME2415XC
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KDC_NME.M01 Page 10 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS - 8 PIN DIP
DIP Package
SIP Package
11.6±0.15 [0.457±0.006]
NME
XXXXDC
Pin
Function
1
4
5
7
-VIN
+VIN
+VOUT
-VOUT
PIN CONNECTIONS - 4 PIN SIP
9.9±0.15 [0.390±0.006]
11.53±0.2 [0.454±0.008]
10.00±0.25 [0.394±0.010]
0.40 [0.016] MIN
NME
6.9±0.15 [0.272±0.006]
XXXXSC
S
Pin
Function
1
2
3
4
-VIN
+VIN
-VOUT
+VOUT
4.10±0.5 [0.161±0.020]
4.10±0.5 [0.161±0.020]
1
2
3
4
0.5±0.05 [0.020±0.002]
1.99±0.25 [0.078±0.010]
1
2.54 [0.100]
4
(2.21 [0.087])
1.14±0.25 [0.045±0.010]
0.50±0.05 [0.020±0.002]
0.25±0.05 [0.010±0.002]
7.62 [0.300]
7
0.25±0.05 [0.010±0.002]
(1.13 [0.044])
5
6.10 +0.15
-0.20
-0.008 ]
[0.240 +0.006
5.08 [0.200]
7.62 [0.300]
All dimensions in mm (inches) Controlling dimension is mm.
All pins on a 2.54 (0.100) pitch and within ±0.1 (0.004) of true position from pin 1 at seating plane ‘S’
Weight: 1.30g (SIP) 1.48g (DIP) 1.5g (SP DIP)
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KDC_NME.M01 Page 11 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
PACKAGE SPECIFICATIONS (Continued)
RECOMMENDED FOOTPRINT DETAILS
8 Pin DIP Package
4 Pin SIP Package
2.54 [0.100]
2.54 [0.100]
x4 HOLES
Ø 0.045
0.039
Ø 1.15
1.00
[
x4 HOLES
Ø 0.045
0.039
Ø 1.15
1.00
]
[
]
2.54 [0.100]
2.54 [0.100]
TUBE OUTLINE DIMENSIONS
4 Pin SIP Tube
8 Pin DIP Tube
12.0 [0.472]
9.3 [0.366]
12.43 [0.489]
14.5 [0.571]
18.0 [0.709]
5.07±1.10[0.200±0.04]
5.05 [0.199]
5.0 [0.197]
Unless otherwise specified all dimensions in mm [inches] ±0.55mm [0.022].
Tube Length (8 Pin DIP) : 520mm [20.472] ±2.0 [0.079].
Tube Length (4 Pin SIP) : 520mm [20.472] ±2.0 [0.079].
Tube Quantity : 35
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KDC_NME.M01 Page 12 of 13
NME Series
Isolated 1W Single Output DC-DC Converters
DISCLAIMER
Unless otherwise stated in the datasheet, all products are designed for standard commercial and industrial applications and NOT for safety-critical and/or life-critical
applications.
Particularly for safety-critical and/or life-critical applications, i.e. applications that may directly endanger or cause the loss of life, inflict bodily harm and/or loss or severe
damage to equipment/property, and severely harm the environment, a prior explicit written approval from Murata is strictly required. Any use of Murata standard products for any safety-critical, life-critical or any related applications without any prior explicit written approval from Murata shall be deemed unauthorised use.
These applications include but are not limited to:
•
Aircraft equipment
•
Aerospace equipment
•
Undersea equipment
•
Power plant control equipment
•
Medical equipment
•
Transportation equipment (automobiles, trains, ships, etc.)
•
Traffic signal equipment
•
Disaster prevention / crime prevention equipment
•
Data Processing equipment
Murata makes no express or implied warranty, representation, or guarantee of suitability, fitness for any particular use/purpose and/or compatibility with any application or device of the buyer, nor does Murata assume any liability whatsoever arising out of unauthorised use of any Murata product for the application of the buyer. The
suitability, fitness for any particular use/purpose and/or compatibility of Murata product with any application or device of the buyer remain to be the responsibility and
liability of the buyer.
Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards that anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm, and take appropriate remedial actions. Buyer will fully indemnify and hold
Murata, its affiliated companies, and its representatives harmless against any damages arising out of unauthorised use of any Murata products in any safety-critical and/
or life-critical applications.
Remark: Murata in this section refers to Murata Manufacturing Company and its affiliated companies worldwide including, but not limited to, Murata Power Solutions.
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: https://www.murata.com/en-eu/products/power/requirements
Murata Power Solutions (Milton Keynes) Ltd. 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.
© 2023 Murata Power Solutions (Milton Keynes) Ltd.
www.murata.com
KDC_NME.M01 Page 13 of 13
