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°C
2
. 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 en-
ter 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.
NME0505DC
NME0509DC
NME0512DC
NME0515DC
NME0524DC
NME0505SC
NME0509SC
NME0512SC
NME0515SC
NME0524SC
NME1205DC
NME1212DC
NME1215DC
NME1205SC
NME1209SC
NME1212SC
NME1215SC
NME1515SC
NME2405DC
NME2412DC
NME2415DC
NME2405SC
NME2412SC
NME2415SC
NME0505SPC
NME0505DPC
5
5
5
5
5
5
5
5
5
5
12
12
12
12
12
12
12
15
24
24
24
24
24
24
5
5
5
9
12
15
24
5
9
12
15
24
5
12
15
5
9
12
15
15
5
12
15
5
12
15
5
5
200 286 12 14 16 40
111 260 8
9 60 75
83 256 6.5 7.5 50 65
67 250 6 7.5 10 25
42 248 5.5 7.5 140 180
200 286 12 14 16 40
111 260 8
9 60 75
83 256 6.5 7.5 50 65
67 250 6 7.5 10 25
42 248 5.5 7.5 140 180
200 117 8 10 12 30
83 104 4
5
8 20
67 110 3
4 40 55
200 117 8 10 12 30
111 115 5 5.5 60 75
83 104 4
5 50 65
67 111 3
4 40 55
67 81 2.5 3
150
200 58 8.5 10
150
83 52 3
4
150
67 51 2.5 3
150
200 58 8.5 10
150
83 52 3
4
150
67 51 2.5 3
150
Short Circuit Protection Options
200 255 9.5 12 11 25 75
200 255 9.5 12 11 25 75
69
77
78
80
80
69
77
78
80
80
69
76
75
69
74
76
75
82
70
80
80
70
80
80
77
77
30
37
33
40
48
30
37
33
40
48
33
55
52
33
48
55
52
40
78
79
40
78
79
22 2887 47047 SIP
22 2887 47047 DIP
Recommended
Alternative
MEE1S1209DC
DIP
MEE1S2409DC
SIP MEE1S2409SC
NME1209DC
NME2409DC
NME2409SC
12
24
24
9
9
9
111 115
111 54
111 54
5
4
4
5.5
5
5
60
75
150
150
74
75
75
48 2311
59 185
59 185
INPUT CHARACTERISTICS
Parameter
Voltage range
Conditions
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
All other variants
3
Min.
4.5
10.8
13.5
21.6
Typ.
5.0
12.0
15
24
95
3
26
Package
Style
DIP
SIP
DIP
SIP
DIP
SIP
Max.
5.5
13.2
16.5
26.4
15
90
48
Units
V
Input short circuit current
Input Reflected ripple
current
mA
mA p-p
For full details go to
www.murata-ps.com/rohs
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 T
A
=25°C, nominal input voltage and rated output current unless otherwise specified.
www.murata-ps.com/support
KDC_NME.I01
Page 1 of 12
NME Series
Isolated 1W Single Output DC-DC Converters
OUTPUT CHARACTERISTICS
Parameter
Rated Power
Voltage Set Point Accuracy
Line regulation
Conditions
See derating curves
See tolerance envelope
High V
IN
to low V
IN
; All short circuit types
High V
IN
to low V
IN
; All other output types
Min.
Typ.
Max.
1.0
Units
W
1.15
1.0
1.2
1.2
%/%
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage
Resistance
Conditions
Flash tested for 1 second
Viso= 1000VDC
Min.
1000
Typ.
10
Max.
Units
VDC
GΩ
GENERAL CHARACTERISTICS
Parameter
Conditions
5V input types
12V input types
15V input types
24V input types
Short circuit types
Min.
Typ.
110
145
100
100
91
Max.
Units
Switching frequency
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Specification
Storage
Conditions
All output types
1
5V output types
All other output types
2
Min.
-40
-50
Typ.
Max.
85
130
41
32
Units
Non-short circuit types
Case Temperature above ambient
Short circuit types (DIP)
Short circuit types (SIP)
Free air convection
°C
23
24
Cooling
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds
Input voltage V
IN
, NME05 types
Input voltage V
IN
, NME12 types
Input voltage V
IN
, NME15 types
Input voltage V
IN
, NME24 types
260°C
7V
15V
18V
28V
TEMPERATURE DERATING GRAPH
Non-short circuit types
1
:
1.5
Short circuit types:
1.5
85°C
Output Power (W)
Output Power (W)
1.0
0.5
0
-40
1.0
0.5
0
-40
85°C
Safe Operating Area
120°C
100
50
0
Ambient Temperature (°C)
150
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 .
2. Excludes 24V input types.
www.murata-ps.com/support
KDC_NME.I01
Page 2 of 12
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
+10%
+5%
V
NOM
+9%
Short circuit
Typical
Loa
d Line
+2.5%
Output Voltage
-2.5%
-7.5%
+4%
Output Voltage
0%
10
75
50
25
Output Load Current (%)
100
10
25
50
Output Load Current (%)
75
-6%
100
www.murata-ps.com/support
KDC_NME.I01
Page 3 of 12
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 enameled 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 recognized 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. 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.
For further information, please visit www.murata-ps.com/rohs
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