SELECTION GUIDE
FEATURES
■BS EN 60950 Certified
■UL 1950 Recognised
■6kVDC Isolation
■Dual Outputs
■Low Profile Package
■Efficiency to 80%
■Power Density 0.48W/cm3
■5V & 12V Input
■5V, 9V, 12V & 15V Output
■Footprint 4.75cm2
■UL 94V-0 Package Material
■No Heatsink required
■Internal SMD Construction
■Toroidal Magnetics
■Fully Encapsulated
■MTTF up to 1.0 Million Hours
■PCB Mounting
■Custom Solutions Available
DESCRIPTION
The NMS Series of DC-DC Converters are UL
1950 recognised and fully certified to BS EN
60950, this makes them ideal for all Telecom
and safety applications where approved
isolation is required. The low profile package
allows mounting in rack systems without risk
of touching other boards. The output
configuration allows all of the rated power to
be drawn from a single pin provided the total
load does not exceed 2 Watts. The devices
feature low noise and low isolation
capacitance suitable for applications in high
noise enviroments, eg heavy electrical
machine interface.
Nominal
Input Output Output Isolation
Voltage Voltage Current Efficiency Capacitance MTTF1
Order Code (V) (V) (mA) (%) (pF) kHrs
NMS0505 5 ±5 ±200 74 1.8 747
NMS0509 5 ±9 ±111 76 1.9 327
NMS0512 5 ±12 ±83 77 2.0 169
NMS0515 5 ±15 ±67 78 2.1 93
NMS1205 12 ±5 ±200 78 1.9 365
NMS1209 12 ±9 ±111 81 2.0 224
NMS1212 12 ±12 ±83 82 2.1 136
NMS1215 12 ±15 ±67 82 2.2 82
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, 5V input types 4.5 5 5.5
Voltage Range Continuous operation, 12V input types 10.8 12 13.2 V
Parameter Conditions MIN TYP MAX Units
Rated Power2TA= 0°C to 70°C 2 W
Voltage Set
Point Accuracy See tolerance envelope –7.5 10 %
Line Regulation High VIN to low VIN 1.0 1.2 %/%
10% load to rated load, 5V output types 10 15
Load Regulation 10% load to rated load, 9V output types 6 15 %
10% load to rated load, 12V output types 6 15
10% load to rated load, 15V output types 6 15
Ripple & Noise BW=DC to 20MHz, all output types 200 mV p-p
Short-circuit duration31 second
Internal power dissipation 900mW
Lead temperature 1.5mm from case for 10 seconds 300°C
Input voltage VIN, NMS05 types 7V
Input voltage VIN, NMS12 types 15V
INPUT CHARACTERISTICS
OUTPUT CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
1Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2 See derating curve
3Supply 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.
NMS SERIES
6kVDC Isolated 2W Dual Output DC-DC Converters
www.dc-dc.com
NMS SERIES
6kVDC Isolated 2W Dual 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 NMS.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
ISOLATION CHARACTERISTICS
GENERAL CHARACTERISTICS
TEMPERATURE CHARACTERISTICS
Parameter Conditions MIN TYP MAX Units
Isolation Test Voltage Flash tested for 1 second 6000 VDC
Resistance Viso=500VDC 10 GΩ
Parameter Conditions MIN TYP MAX Units
Switching Frequency All input types 35 kHz
Parameter Conditions MIN TYP MAX Units
Specification All output types 0 70 °C
Storage -50 130 °C
Case Temperature All output types 32 °C
Above Ambient
Cooling Free air convection
32.60 max
14.72
MECHANICAL DIMENSIONS
2.16 0.55
0.45
15.24 2.54
3.90
16.95
0.30
0.20
0.60 max
24 Pin DIL
Weight: 7. 5 g
All dimensions in mm XX.XX ±0.25mm. All pins on a 2.54mm pitch and within ±0.25mm of true position.
PERFORMANCE CHARACTERISTICS
tolerance envelope
+10%
+5%
V nominal
temperature derating graph
4
3
2
1
0
+2.5%
–2.5%
–7.5%
10 50 100
Output Load Current (%) 0 20 40 60 80
Ambient Temperature (°C)
70°C
XYYWWi
NMS0505
9.40±0.30
Pin Connections (Top View)
1
2
8
9
10
11
12
24
23
17
16
15
14
13
VIN
GND
–V
NC
0V
NC
+V
NC
NC
–V
NC
0V
NC
+V
Safe Operating Area
