NME 5V & 12V Series

NME 5V & 12V Series
www.murata-ps.com
Isolated 1W Single Output DC/DC Converters
SELECTION GUIDE
Order Code
FEATURES
„
RoHS compliant
„
Single isolated output
„
1kVDC isolation
„
Efficiency up to 80%
„
Wide temperature performance at full
1 watt load, –40°C to 85°C
„
Power density 1.53W/cm3
„
UL 94V-0 package material
„
Footprint from 0.69cm2
NME0505DC
NME0509DC
NME0512DC
NME0515DC
NME0524DC
NME0505SC
NME0509SC
NME0512SC
NME0515SC
NME0524SC
NME1205DC
NME1209DC
NME1212DC
NME1215DC
NME1205SC
NME1209SC
NME1212SC
NME1215SC
Nominal
Input
Voltage
V
V
mA
Input
Current at
Rated Load
mA
5
9
12
15
24
5
9
12
15
24
5
9
12
15
5
9
12
15
200
111
83
66
42
200
111
83
66
42
200
111
83
66
200
111
83
66
289
260
256
250
248
289
260
256
250
248
120
115
105
110
120
115
110
111
Output
Voltage
5
5
5
5
5
5
5
5
5
5
12
12
12
12
12
12
12
12
Output
Current
Efficiency
%
69
77
78
80
80
69
77
78
80
80
69
74
76
75
69
74
76
75
Isolation
MTTF1 Package
Capacitance
Style
pF
kHrs
30
37
33
40
48
30
37
33
40
48
33
48
55
52
33
48
55
52
3415
3078
2205
1532
2493
2311
1780
1313
2493
2311
1780
1313
3415
3078
2205
1532
DIP
SIP
DIP
SIP
„
Industry standard pinout
INPUT CHARACTERISTICS
„
5V & 12V input
Parameter
Conditions
Min.
Typ.
Max.
„
5V, 9V, 12V and 15V output
Voltage range
Continuous operation, 5V input types
Continuous operation, 12V input types
4.5
10.8
„
No heatsink required
Reflected ripple current
5.0
12.0
26
5.5
13.2
48
mA p-p
„
Internal SMD construction
OUTPUT CHARACTERISTICS
„
Fully encapsulated with toroidal magnetics
Parameter
Conditions
Typ.
Max.
Units
Rated Power2
Voltage Set Point Accuracy
Line regulation
TA=-40°C to 120°C
See tolerance envelope
High VIN to low VIN
10% load to rated load, 5V output types
10% load to rated load, 9V output types
10% load to rated load, 12V output types
10% load to rated load, 15V output types
10% load to rated load, 24V output types
BW=DC to 20MHz, 5V output types
BW=DC to 20MHz, 9V output types
BW=DC to 20MHz, 12V output types
BW=DC to 20MHz, 15V output types
BW=DC to 20MHz, 24V output types
1.0
W
1.2
15
10
9.5
8.5
7.5
110
75
65
55
180
%/%
„
No external components required
„
MTTF up to 3.4 million hours
„
Custom solutions available
„
Pin compatible with LME & NML series
Load Regulation2
„
PCB mounting
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°C. For lower ripple,
refer to output ripple reduction section.
Ripple and Noise
Min.
1.0
14
9
7.5
7.0
5.5
85
60
50
40
140
Units
V
%
mV p-p
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds
Internal power dissipation
Input voltage VIN, NME05 types
Input voltage VIN, NME12 types
300°C
450mW
7V
15V
1. Calculated using MIL-HDBK-217F FN2 with nominal input voltage at full load.
2. See derating curve.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
For full details go to
www.murata-ps.com/rohs
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KDC_NME.F02 Page 1 of 6
NME 5V & 12V Series
Isolated 1W Single Output DC/DC Converters
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation test voltage
Resistance
Flash tested for 1 second
Viso= 1000VDC
1000
Parameter
Conditions
Min.
Switching frequency
5V input types
12V input types
Typ.
Max.
Units
VDC
GΩ
10
GENERAL CHARACTERISTICS
Typ.
Max.
110
145
Units
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Specification
Storage
All output types
-40
-50
Case Temperature above ambient
5V output types
All other output types
Free air convection
TEMPERATURE DERATING GRAPH
Output Power (W)
0.5
+5%
VNOM
85°C
Safe Operating Area
120°C
0
-40
Units
85
130
41
32
°C
+10%
1.5
1.0
Max.
TOLERANCE ENVELOPE
100
50
0
Ambient Temperature (°C)
150
Output Voltage
Cooling
Typ.
Typical
L
oad Line
+2.5%
-2.5%
-7.5%
10
75
50
25
Output Load Current (%)
100
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.
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?”
For a part holding no specific agency approvals, such as the NME series, 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.
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KDC_NME.F02 Page 2 of 6
NME 5V & 12V Series
Isolated 1W Single Output DC/DC Converters
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.
Start-up time
μs
991
3524
5630
7750
19850
682
2102
4030
6193
NME0505SC
NME0509SC
NME0512SC
NME0515SC
NME0524SC
NME1205SC
NME1209SC
NME1212SC
NME1215SC
Typical Start-Up Wave Form
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
OSCILLOSCOPE
C1 C2 C3
+
SUPPLY
Input
-
+
R1
T1
R2
Y INPUT
Output
-
R LOAD
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KDC_NME.F02 Page 3 of 6
NME 5V & 12V 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 <2% of the rated voltage of the DC/DC converter. The SRF (Self Resonant Frequency) should be
>20MHz.
L
DC
Power
Source
NME0505SC
NME0509SC
NME0512SC
NME0515SC
NME0524xC
NME1205SC
NME1209SC
NME1212SC
NME1215SC
L, μH
47
47
68
100
100
100
47
68
100
Inductor
SMD
82473C
82473C
82683C
82104C
82104C
82104C
82473C
82683C
82104C
C
Load
DC
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
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KDC_NME.F02 Page 4 of 6
NME 5V & 12V Series
Isolated 1W Single Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS - 8 PIN DIP
DIP Package
SIP Package
11.48
(0.45)
9.80 (0.386)
NME0505DC
6.00
(0.236)
XYYWW
Pin
Function
1
4
5
7
-VIN
+VIN
+VOUT
-VOUT
PIN CONNECTIONS - 4 PIN SIP
11.50 (0.453)
6.80 (0.267)
10.0
(0.393)
NME0505SC
XYYWW
4.60 (0.181)
3.60 (0.142)
1
0.55 (0.022)
0.45 (0.018)
1
2
3
4.60 (0.181)
3.60 (0.142)
4
Function
1
2
3
4
-VIN
+VIN
-VOUT
+VOUT
4
0.55 (0.022)
0.45 (0.018)
1.89 (0.074)
2.77 (0.109)
1.09 (0.043)
0.55 (0.022)
0.45 (0.018)
Pin
0.30 (0.0118)
0.20 (0.0078)
7.62 (0.3)
7
1.25
(0.049)
5
0.30 (0.0118)
0.20 (0.0078)
5.08 (0.2)
7.62 (0.3)
7.62
(0.3)
1.94 (0.0763)
All dimensions in mm ±0.25mm (inches ±0.01). All pins on a 2.54 (0.1) pitch and within ±0.25 (0.01) of true position.
Weight: 1.30g (SIP) 1.48g (DIP)
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KDC_NME.F02 Page 5 of 6
NME 5V & 12V Series
Isolated 1W Single Output DC/DC Converters
PACKAGE SPECIFICATIONS (continued)
RECOMMENDED FOOTPRINT DETAILS
8 Pin DIP Package
4 Pin SIP Package
4 HOLES
0.1 (0.00394)
1.15 (0.0453)
Ø
1.00 (0.0394)
2.54
(0.1)
2.54 (0.1)
4 HOLES
0.1 (0.00394)
Ø 1.15 (0.0453)
1.00 (0.0394)
2.54
(0.1)
2.54 (0.1)
TUBE OUTLINE DIMENSIONS
4 Pin SIP Tube
8 Pin DIP Tube
0.50 (0.020)
18.00 (0.709)
14.50 (0.571)
5.07 (0.199)
12.43 (0.489)
9.30 (0.366)
12.0 (0.472)
5.10 (0.2)
0.65 (0.026)
5.00 (0.2)
Unless otherwise stated all dimensions in mm (inches) ±0.5mm.
Tube length (8 Pin DIP) : 520mm ±2mm (20.47).
Tube length (4 Pin SIP) : 520mm ±2mm (20.47).
Tube Quantity : 35
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300°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
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
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. 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.
© 2012 Murata Power Solutions, Inc.
www.murata-ps.com/support
KDC_NME.F02 Page 6 of 6