FEATURES
s
Single Isolated Output
s
Industry Standard Pinout
s
1kVDC Isolation
s
Efficiency to 80%
s
Power Density 1.45W/cm
3
s
24V & 48V Input
s
5V, 9V, 12V and 15V Output
s
Footprint from 0.69cm
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
s
Pin Compatible with LME
s
SIP & DIP Package Styles
DESCRIPTION
The NME 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.
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
=25C, nominal input voltage and rated output current unless otherwise specified.
SELECTION GUIDE
Nominal
Input
Output
Output
Voltage
Voltage
Current
MTTF
1
Order Code
(V)
(V)
(mA)
(%)
(pF)
kHrs
NME2405D
24
5
200
70
40
201
NME2409D
24
9
111
75
59
185
DIP
NME2412D
24
12
83
80
78
163
NME2415D
24
15
66
80
79
136
NME2405S
24
5
200
70
40
201
NME2409S
24
9
111
75
59
185
SIP
NME2412S
24
12
83
80
78
163
NME2415S
24
15
66
80
79
136
NME4805D
48
5
200
70
32
213
NME4809D
48
9
111
75
50
194
DIP
NME4812D
48
12
83
80
76
164
NME4815D
48
15
66
80
75
140
NME4805S
48
5
200
70
32
213
NME4809S
48
9
111
75
50
194
SIP
NME4812S
48
12
83
80
76
164
NME4815S
48
15
66
80
75
140
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.
Parameter
Conditions
MIN
TYP
MAX
Units
Continuous operation, 24V input types
21.6
24
26.4
Voltage Range
Continuous operation, 48V input types
43.2
48
52.8
V
Parameter
Conditions
MIN
TYP
MAX
Units
Rated Power
2
T
A
= 0C to 70C
1
W
Voltage Set
Point Accuracy
See tolerance envelope
Line Regulation High V
IN
to low V
IN
1.2
%/%
10% load to rated load, 5V output types
15
Load Regulation
10% load to rated load, all other output types
10
%
Ripple & Noise BW=DC to 20MHz, all input types
150
mV p-p
Short-circuit duration
3
1 second
Lead temperature 1.5mm from case for 10 seconds
300C
Input voltage V
IN
, NME24 types
28V
Input voltage V
IN
, NME48 types
54V
INPUT CHARACTERISTICS
OUTPUT CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
NME 24V & 48V SERIES
Isolated 1W Single Output DC-DC Converters
www.dc-dc.com
NME 24V & 48V SERIES
Isolated 1W Single Output DC-DC Converters
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
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 NME2.3
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
PIN CONNECTIONS
11.50
9.80
MECHANICAL DIMENSIONS
8 Pin DIP
PIN
1
GND
4
VIN
5
+V
7
0V
4 Pin SIP
PIN
1
GND
2
VIN
3
0V
4
+V
6.80*
7.62
1.09
1.94
7.62
0.30
0.20
4.60
3.60
0.55
0.45
11.50
6.00**
10.0
1.94
1.25
7.62
0.30
0.20
4.60
3.60
0.55
0.45
8 Pin DIP
Weight: 1.48g
4 Pin SIP
Weight: 1.30g
NME2405D
XYYWW
NME2405S
XYYWW
1
1
7
5
4
2 3 4
ISOLATION CHARACTERISTICS
PERFORMANCE CHARACTERISTICS
GENERAL CHARACTERISTICS
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Isolation Test Voltage
Flash tested for 1 second
1000
VDC
Resistance
Viso=500VDC
1
G
Parameter
Conditions
MIN
TYP
MAX
Units
Switching Frequency
All input types
100
kHz
Parameter
Conditions
MIN
TYP
MAX
Units
Specification
All output types
0
70
C
Storage
-55
150
C
Cooling
Free air convection
tolerance envelope
+
10%
+5%
V nominal
+2.5%
-2.5%
-7.5%
10
50
100
Output Load Current (%)
temperature derating graph
2.0
1.5
1.0
0.5
0
50
0
50
70
100 125 150
Ambient Temperature (C)
Safe Operating Area
* 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.
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