NMA 24V & 48V SERIES
Isolated 1W Dual Output DC-DC Converters
SELECTION GUIDE
Nominal
Input
Voltage
Output
Voltage
Output
Current
MTTF
1
Order Code
NMA2405D
NMA2409D
NMA2412D
(V)
24
24
24
24
24
24
24
24
48
48
48
48
48
48
48
48
(V)
5
9
12
15
5
9
12
15
5
9
12
15
5
9
12
15
(mA)
±100
±55
±42
±33
±100
±55
±42
±33
±100
±55
±42
±33
±100
±55
±42
±33
(%)
70
80
80
80
70
80
80
80
70
80
80
80
70
80
80
80
(pF)
39
50
65
95
39
50
65
95
26
38
52
56
26
38
52
56
kHrs
194
166
134
101
194
166
134
101
206
174
139
104
206
174
139
104
SIP
DIP
SIP
DIP
FEATURES
s
Dual Output from a Single Input Rail
s
Industry Standard Pinout
s
Power Sharing on Output
s
1kVDC Isolation
s
Efficiency to 80%
s
Power Density 0.85W/cm
3
s
24V & 48V Input
s
5V, 9V, 12V and 15V Output
s
Footprint from 1.17cm
2
s
UL 94V-0 Package Material
s
No Heatsink Required
s
Internal SMD Construction
s
Toroidal Magnetics
s
Fully Encapsulated
s
No External Components Required
s
Custom Solutions Available
DESCRIPTION
The NMA series of DC-DC converters are the
standard building blocks for on-boar d
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.
NMA2415D
NMA2405S
NMA2409S
NMA2412S
NMA2415S
NMA4805D
NMA4809D
NMA4812D
NMA4815D
NMA4805S
NMA4809S
NMA4812S
NMA4815S
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
Continuous operation, 48V input types
21.6
43.2
24
48
26.4
52.8
V
OUTPUT CHARACTERISTICS
Parameter
Conditions
2
MIN
TYP
MAX
Units
High V
IN
to low V
IN
10% load to rated load, 5V output types
Load Regulation
10% load to rated load, all other output types
Ripple & Noise BW=DC to 20MHz, all input types
Rated Power
Voltage Set
Point Accuracy
Line Regulation
T
A
= 0°C to 70°C
See tolerance envelope
1
W
1.2
15
10
150
%/%
%
mV p-p
ABSOLUTE MAXIMUM RATINGS
Short-circuit duration
3
Lead temperature 1.5mm from case for 10 seconds
Input voltage V
IN
, NMA24 types
Input voltage V
IN
, NMA48 types
1 second
300°C
28V
54V
www.dc-dc.com
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 T
A
=25°C, nominal input voltage and rated output current unless otherwise specified.
NMA 24V & 48V SERIES
Isolated 1W Dual Output DC-DC Converters
ISOLATION CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
PIN CONNECTIONS
1000
1
VDC
GΩ
14 Pin DIP
PIN
1 GND
7
NC
8
0V
9
+V
11
–V
14
V
IN
7 Pin SIP
PIN
1
V
IN
2 GND
4
–V
5
0V
6
+V
Isolation Test Voltage
Resistance
Flash tested for 1 second
Viso=500VDC
GENERAL CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Switching Frequency
All input types
100
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Specification
Storage
Cooling
All output types
Free air convection
0
–55
70
150
°C
°C
PERFORMANCE CHARACTERISTICS
tolerance envelope
+
10%
+5%
V nominal
2.0
+2.5%
-2.5%
-7.5%
1.0
0.5
0
1.5
temperature derating graph
Safe Operating Area
10
50
Output Load Current (%)
100
–50
0
50 70 100 125 150
Ambient Temperature (°C)
MECHANICAL DIMENSIONS
14 Pin DIP
Weight: 2.3g (24V)
2.9g (48V)
19.50
2.13
15.24
1.09
NMA2405D
9.80
6.80*
7.62
4.60
3.60
0.55
0.45
2.54
1
7
0.30
0.20
XYYWW
14
1
1
9
8
7 Pin SIP
Weight: 2.3g (24V)
2.9g (48V)
19.50
2.00
0.55
0.45
0.30
0.20
12.70
6.00**
10.0
NMA2405S
XYYWW
1.25
* 7.70 for 48V variants
**7.50 for 48V variants
All dimensions in mm XX.XX ±0.25mm. All pins on a
2.54mm pitch and within ±0.25mm of true position.
4.60
3.60
1 2
4
2.54
5
6
0.55
0.45
C&D Technologies (NCL) Limited reserve the right to alter or improve the
specification, internal design or manufacturing process at any time, without
notice. Please check with your supplier or visit our web site to ensure that
you have the current and complete specification for your product before use.
© C&D Technologies (NCL) Limited 2001
NDC NMA2.3
No part of this publication may be copied, transmitted or stored in a
retrieval system or reproduced in any way including, but not limited to,
photography, photocopy, magnetic or other recording means, without prior
written permission from C&D Technologies (NCL) Limited.
Instructions for use are available from www.dc-dc.com
C&D Technologies (NCL) Ltd
Tanners Drive, Blakelands North
Milton Keynes MK14 5BU, England
Tel: +44 (0)1908 615232
Fax:+44 (0)1908 617545
email: info@cdtechno-ncl.com
www: http://www.dc-dc.com
C&D Technologies (NCL), Inc.
5816 Creedmoor Road, Raleigh
NC 27612, USA
Tel: +1 (919) 571-9405
Fax: +1 (919) 571-9262
email: info@us.cdtechno-ncl.com
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