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NML1205SC

P1-P3P4-P5
NML Series
Isolated 2W Single Output DC/DC Converters
KDC_NML.E02 Page 1 of 5
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SELECTION GUIDE
Order Code
Nominal
Input
Voltage
Output
Voltage
Output
Current
Input
Current at
Rated Load
Efficiency
Isolation
Capacitance
MTTF
1
V V mA mA % pF kHrs
NML0505SC 5 5 400 513 78 19 2327
NML0509SC 5 9 222 492 81 27 1393
NML0512SC 5 12 167 479 84 32 832
NML0515SC 5 15 133 481 83 27 481
NML1205SC 12 5 400 207 81 28 716
NML1209SC 12 9 222 198 84 42 593
NML1212SC 12 12 167 197 85 46 461
NML1215SC 12 15 133 197 85 54 328
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Voltage range
Continuous operation, 5V input types 4.5 5.0 5.5
V
Continuous operation, 12V input types 10.8 12.0 13.2
Reflected ripple current
5V input types 33
mA p-p
12V input types 38
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated Power TA=-40°C to 85°C 2.0 W
Voltage Set Point Accuracy See tolerance envelope
Line regulation High V
IN to low VIN 1.0 1.2 %/%
Load Regulation
2
10% load to rated load, 5V output types 7.0 8.5
%
10% load to rated load, 9V output types 4.5 5.2
10% load to rated load, 12V output types 4.5 5.5
10% load to rated load, 15V output types 3.7 8.5
Ripple and Noise
NML0505SC, BW=DC to 20MHz 96
200 mV p-p
NML0509SC, BW=DC to 20MHz 67
NML0512SC, BW=DC to 20MHz 59
NML0515SC, BW=DC to 20MHz 53
NML1205SC, BW=DC to 20MHz 76
NML1209SC, BW=DC to 20MHz 63
NML1212SC, BW=DC to 20MHz 53
NML1215SC, BW=DC to 20MHz 45
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation test voltage Flash tested for 1 second 1000 VDC
Resistance Viso= 500VDC 10 GΩ
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds 300°C
Internal power dissipation 805mW
Input voltage V
IN, NML05 types 7V
Input voltage V
IN, NML12 types 15V
1. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
All specifications typical at T
A=25°C, nominal input voltage and rated output current unless otherwise specified.
FEATURES
RoHS compliant
Single isolated output
1kVDC isolation
Efficiency up to 85%
Wide temperature performance at full
2 watt load, –40°C to 85°C
Power density 2.01W/cm
3
UL 94V-0 package material
Footprint from 1.05cm
2
Industry standard pinout
5V & 12V input
5V, 9V, 12V and 15V output
No heatsink required
Internal SMD construction
Fully encapsulated with toroidal magnetics
No external components required
MTTF up to 2.3 million hours
Custom solutions available
Pin compatible with LME & NME series
No electrolytic or tantalum capacitors
DESCRIPTION
The NML 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 2 watt output at 85°C. Pin
compatibility with the NME and LME ensures ease
of upgradeability.
NML Series
Isolated 2W Single Output DC/DC Converters
KDC_NML.E02 Page 2 of 5
www.murata-ps.com/support
GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Switching frequency
5V input types 90
kHz
12V input types 90
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specification All output types -40 85
°C
Storage -50 130
Case Temperature above ambient
5V output types 45
All other output types
36
Cooling Free air convection
TEMPERATURE DERATING GRAPH
TOLERANCE ENVELOPE
+10%
Output Load Current (%)
Output Voltage
+5%
-7.5%
-2.5%
+2.5%
Typical Load Line
V
NOM
100
75
50
25
10
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 NML 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 NML 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 NML 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.
150100
50
0
-40
0
1
2
3
Safe Operating Area
85°C
Ambient Temperature (°C)
Output Power (W)
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.
NML Series
Isolated 2W Single Output DC/DC Converters
KDC_NML.E02 Page 3 of 5
www.murata-ps.com/support
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.
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1 1µF X7R m ultilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter
C2
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
than 100m at 100 kHz
C3 100nF multilayer ceramic capacitor, general purpose
R1 450 resistor, carbon film, ±1% tolerance
R2 50 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
OSCILLOSCOPE
Y INPUT
SUPPLY
C1 C2 C3 R1 T1
R2
Input Output
DC/DC Converter
R LOAD
+
+
-
-
Typical Start-Up Wave Form
Start-up time
µs
NML0505SC 790
NML0509SC 1154
NML0512SC 2265
NML0515SC 2998
NML1205SC 396
NML1209SC 880
NML1212SC 1156
NML1215SC 2394
P1-P3P4-P5

NML1205SC

Mfr. #:
Buy NML1205SC
Manufacturer:
Murata Power Solutions
Description:
Isolated DC/DC Converters 2W SNGL OUT 12-5 VDC Single Output
Lifecycle:
New from this manufacturer.
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