NMA 24V &48V SERIES
Isolated 1W Dual Output DC-DC Converters
SELECTION GUIDE
Nominal
Input
Voltage Voltage
Output
Output
Current
1
MTTF
Order Code
(V)
(V)
(mA)
(%)
70
(pF)
39
kHrs
NMA2405D
24
5
±100
194
NMA2409D
NMA2412D
NMA2415D
NMA2405S
NMA2409S
NMA2412S
NMA2415S
NMA4805D
NMA4809D
NMA4812D
NMA4815D
NMA4805S
NMA4809S
NMA4812S
NMA4815S
24
24
24
24
24
24
24
48
48
48
48
48
48
48
48
9
12
15
5
±55
±42
±33
±100
±55
±42
±33
±100
±55
±42
±33
±100
±55
±42
±33
80
80
80
70
80
80
80
70
80
80
80
70
80
80
80
50
65
95
39
50
65
95
26
38
52
56
26
38
52
56
166
134
101
194
166
134
101
206
174
139
104
206
174
139
104
DIP
SIP
DIP
SIP
FEATURES
■ Dual Output from a Single Input Rail
■ Industry Standard Pinout
■ Power Sharing on Output
■ 1kVDC Isolation
■ Efficiency to 80%
■ Power Density 0.85W/cm
■ 24V & 48V Input
■ 5V, 9V, 12V and 15V Output
■ Footprint from 1.17cm
■ UL 94V-0 Package Material
■ No Heatsink Required
■ Internal SMD Construction
■ Toroidal Magnetics
■ Fully Encapsulated
■ No External Components Required
■ Custom Solutions Available
9
12
15
5
3
9
12
15
5
2
9
12
15
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.
DESCRIPTION
INPUT CHARACTERISTICS
The NMA series of DC-DC converters are the
standard building blocks for on-board
distributed power systems. They are ideally
suited to 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.
Parameter
Conditions
MIN
21.6
43.2
TYP
24
48
MAX
26.4
52.8
Units
Continuous operation, 24V input types
Continuous operation, 48V input types
Voltage Range
V
OUTPUT CHARACTERISTICS
Parameter
Rated Power
Voltage Set
Conditions
TA= 0°C to 70°C
MIN
TYP
MAX
Units
2
1
W
See tolerance envelope
Point Accuracy
Line Regulation High VIN to low VIN
10% load to rated load, 5V output types
1.2
15
10
%/%
%
Load Regulation
10% load to rated load, all other output types
Ripple & Noise BW=DC to 20MHz, all input types
150
mV p-p
ABSOLUTE MAXIMUM RATINGS
Short-circuit duration3
Lead temperature 1.5mm from case for 10 seconds
Input voltage VIN, NMA24 types
Input voltage VIN, NMA48 types
1 second
300°C
28V
54V
1 Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2 See derating curve
3 Supply voltage must be discontinued at the end of the short circuit duration.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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