FEATURES
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 benefi t 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.
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www.murata-ps.com
RoHS compliant
Effi ciency up to 80%
Power density up to 0.85W/cm
Dual output from a single input rail
UL 94V-0 package material
No heatsink required
Footprint from 1.17cm
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
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For full details go to
2
s
3
1. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2. See derating graph.
3. Supply voltage must be discontinued at the end of the short circuit duration.
All specifi cations typical at T
SELECTION GUIDE
NMA2405DC
NMA2409DC
NMA2412DC
NMA2415DC
NMA4805DC
NMA4809DC
NMA4812DC
NMA4815DC
NMA2405SC
NMA2409SC
NMA2412SC
NMA2415SC
NMA4805SC
NMA4809SC
NMA4812SC
NMA4815SC
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
Voltage range
OUTPUT CHARACTERISTICS
Parameter
Rated Power
Voltage Set Point Accuracy
Line regulation
Load Regulation
Ripple and Noise
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
Lead temperature 1.5mm from case for 10 seconds
Internal power dissipation
Input voltage V
Input voltage V
Order Code
2
IN
IN,
, NMA24 types
Nominal
NMA48 types
Voltage
Input
24
24
24
24
48
48
48
48
24
24
24
24
48
48
48
48
V
3
A
=25°C, nominal input voltage and rated output current unless otherwise specifi ed.
Conditions
Continuous operation, 24V input types
Continuous operation, 48V input types
Conditions
T
See tolerance envelope
High V
10% load to rated load, 5V output types
10% load to rated load, all other output types
BW=DC to 20MHz, all input types
Output
Voltage
A
±12
±15
±12
±15
±12
±15
±12
±15
=0
±5
±9
±5
±9
±5
±9
±5
±9
V
°C
IN
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
to low V
to 70
Current
Output
°C
±100
±100
±100
±100
±55
±42
±33
±55
±42
±33
±55
±42
±33
±55
±42
±33
mA
IN
Isolated 1W Dual Output DC/DC Converters
NMA 24V & 48V Series
Effi ciency
70
77
80
80
70
80
80
80
70
77
80
80
70
80
80
80
%
A
W
Capacitance
Isolation
pF
39
85
65
95
26
38
52
56
39
85
65
95
26
38
52
56
2010-06-09 KDC_NMAC2.F01 Page 1 of 4
1 second
300°C
450mW
28V
54V
Min.
21.6
43.2
Min.
MTTF
kHrs
194
129
134
101
206
174
139
104
194
129
134
101
206
174
139
104
1
Package
Style
Typ.
Typ.
DIP
SIP
24
48
MEA1D2405DC
MEA1D2409DC
MEA1D2412DC
MEA1D2415DC
MEA1D4805DC
MEA1D4809DC
MEA1D4812DC
MEA1D4815DC
MEA1D2405SC
MEA1D2409SC
MEA1D2412SC
MEA1D2415SC
MEA1D4805SC
MEA1D4809SC
MEA1D4812SC
MEA1D4815SC
Max.
Max.
Recommended
26.4
52.8
150
1.2
15
10
Alternatives
1
data sheet)
(click for
mV p-p
Units
Units
%/%
%
W
V