NMA 24V/48V Series Datasheet by Murata Power Solutions Inc.

NOT RECOMMENDED MN. MW FOR NEW DESIGNS Isolated1
NMA 24V & 48V Series
Isolated 1W Dual Output DC/DC Converters
KDC_NMAC2.G02 Page 1 of 4
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For full details go to
www.murata-ps.com/rohs
 
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SELECTION GUIDE
Order Code
Nominal
Input
Voltage
Output
Voltage
Output
Current Efficiency Isolation
Capacitance MTTF1Package
Style
Recommended
Alternatives
(click for
data sheet)
V V mA % pF kHrs
Not recommended for new designs:
NMA2405SC 24 ±5 ±100 70 39 194
SIP
MEA1D2405SC
NMA2409SC 24 ±9 ±55 77 85 129 MEA1D2409SC
NMA2412SC 24 ±12 ±42 80 65 134 MEA1D2412SC
NMA2415SC 24 ±15 ±33 80 95 101 MEA1D2415SC
Obsolete:
NMA2405DC 24 ±5 ±100 70 39 194
DIP
MEA1D2405DC
NMA2409DC 24 ±9 ±55 77 85 129 MEA1D2409DC
NMA2412DC 24 ±12 ±42 80 65 134 MEA1D2412DC
NMA2415DC 24 ±15 ±33 80 95 101 MEA1D2415DC
NMA4805DC 48 ±5 ±100 70 26 206 MEA1D4805DC
NMA4809DC 48 ±9 ±55 80 38 174 MEA1D4809DC
NMA4812DC 48 ±12 ±42 80 52 139 MEA1D4812DC
NMA4815DC 48 ±15 ±33 80 56 104 MEA1D4815DC
NMA4805SC 48 ±5 ±100 70 26 206
SIP
MEA1D4805SC
NMA4809SC 48 ±9 ±55 80 38 174 MEA1D4809SC
NMA4812SC 48 ±12 ±42 80 52 139 MEA1D4812SC
NMA4815SC 48 ±15 ±33 80 56 104 MEA1D4815SC
When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external
capacitance value for guaranteed start up. The slower the rise time of the input voltage the greater the maximum value of the
additional external capacitance for reliable start up.
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Voltage range Continuous operation, 24V input types 21.6 24 26.4 V
Continuous operation, 48V input types 43.2 48 52.8
OUTPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Rated Power2TA=0°C to 70°C 1W
Voltage Set Point Accuracy See tolerance envelope
Line regulation High VIN to low VIN 1.2 %/%
Load Regulation 10% load to rated load, 5V output types 15 %
10% load to rated load, all other output types 10
Ripple and Noise BW=DC to 20MHz, all input types 150 mV p-p
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds 300°C
Internal power dissipation 450mW
Input voltage VIN, NMA24 types 28V
Input voltage VIN, NMA48 types 54V
1. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2. See derating graph.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
FEATURES
RoHS compliant
Efficiency up to 80%
Power density up to 0.85W/cm3
Dual output from a single input rail
UL 94V-0 package material
No heatsink required
Footprint from 1.17cm2
Industry standard pinout
Power sharing on output
1kVDC isolation
24V & 48V input
5V, 9V, 12V and 15V output
Internal SMD construction
Fully encapsulated with toroidal
magnetics
No external components required
DESCRIPTION
The NMA series of DC/DC converters are the
standard buliding blocks for on-board distrib-
uted power systems. They are ideally suited for
providing dual rail supplies on primarily digital
boards with the added benefit of galvanic isolation
to reduce switching noise. All of the rated power
may be drawn from a single pin provided the total
load does not exceed 1 watt.
A
W
s
NOT RECOMMENDED
FOR NEW DESIGNS
S
Murcia Power Solutions
NMA 24V & 48V Series
Isolated 1W Dual Output DC/DC Converters
KDC_NMAC2.G02 Page 2 of 4
www.murata-ps.com/support
GENERAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Switching frequency All input types 100 kHz
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation test voltage Flash tested for 1 second 1000 VDC
Resistance Viso= 500VDC 10
TEMPERATURE CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Specification All output types 0 70 °C
Storage -55 150
Cooling Free air convection
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 NMA 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 NMA 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 NMA 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.
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%.
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
Murulo Power Solutions Z fififl % 4L 4L *‘F fl , A F 1? * ¢ ,,,,, r ’ fig 4* * w
NMA 24V & 48V Series
Isolated 1W Dual Output DC/DC Converters
KDC_NMAC2.G02 Page 3 of 4
www.murata-ps.com/support
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS PIN CONNECTIONS - 14 PIN DIP
Pin Function
1-VIN
7NC
8OV
9+V
OUT
11 -VOUT
14 +VIN
PIN CONNECTIONS - 7 PIN SIP
Pin Function
1+VIN
2-VIN
4-VOUT
5OV
6+V
OUT
0.77 (19.50)
0.385
(9.80)
0.268
(6.80)*
0.181 (4.60)
0.142 (3.60)
0.022 (0.55)
0.0178 (0.45)
0.6 (15.24)
0.084
(2.13)
0.3 (7.62) 0.0118 (0.30)
0.0079 (0.20)
0.043
(1.09)
0.1 (2.54)
1 7
14 11 9 8
XYYWWi
NMA2405DC
Weight:
2.4g (24V DIP)
2.9g (48V DIP)
2.2g (24V SIP)
2.9g (48V SIP)
DIP package SIP package
0.77
(19.50)
0.236
(6.00)**
0.394
(10.00)
0.181 (4.60)
0.141 (3.60)
0.0118 (0.30)
0.0079 (0.20)
0.5 (12.70)
0.05
(1.25)
0.079
(2.00)
0.022 (0.55)
0.0178 (0.45)
0.1 (2.54)
0.22 (0.55)
0.0178 (0.45)
NMA2405SC
XYYWWi
1 2 4 5 6
* 0.303 (7.70) for 48V variants
** 0.295 (7.50) for 48V variants
All dimensions in inches ±0.01 (mm ±0.25mm). All pins on a 0.1 (2.54) pitch and within ±0.01 (0.25) of true position.
TOLERANCE ENVELOPE
+10%
Output Load Current (%)
Output Voltage
+5%
-7.5%
-2.5%
+2.5%
Typical Load Line
VNOM
100
75
50
25
10
TEMPERATURE DERATING GRAPH
150
10050
0
0
0.5
1.0
1.5
Safe Operating Area
Ambient Temperature (ºC)
Output Power (W)
70°C
125ºC
The voltage tolerance envelope shows typical load regulation characteristics
for this product series. The tolerance envelope is the maximum output volt-
age variation due to changes in output loading.
Murulo Power Solutions f‘r .: Moi,
NMA 24V & 48V Series
Isolated 1W Dual Output DC/DC Converters
KDC_NMAC2.G02 Page 4 of 4
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. © 2011 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
www.murata-ps.com/support
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/
PACKAGE SPECIFICATIONS (continued)
RECOMMENDED FOOTPRINT DETAILS
TUBE OUTLINE DIMENSIONS
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
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Unless otherwise stated all dimensions in inches (mm) ±0.5mm.
Tube length (14 Pin DIP) : 20.47 (520mm ±2mm).
Tube length (7 Pin SIP) : 20.47 (520mm ±2mm).
14 Pin DIP Tube 7 Pin SIP Tube
14 Pin DIP Package 7 Pin SIP Package
Tube Quantity : 25


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
0.1 (2.54)
0.045 (1.15)
0.039 (1.00)
Ø
0.1 (2.54)
0.045 (1.15)
0.039 (1.00)
Ø
0.1 (2.54)
0.1 (2.54)
5 HOLES
0.00394 (0.1)
5 HOLES
0.00394 (0.1