NMA4812S - C&D Technologies, Inc.

SELECTION GUIDE

FEATURES

■Dual Output from a Single Input Rail

■Industry Standard Pinout

■Power Sharing on Output

■1kVDC Isolation

■Efficiency to 80%

■Power Density 0.85W/cm3

■24V & 48V Input

■5V, 9V, 12V and 15V Output

■Footprint from 1.17cm2

■UL 94V-0 Package Material

■No Heatsink Required

■Internal SMD Construction

■Toroidal Magnetics

■Fully Encapsulated

■No External Components Required

■Custom Solutions Available

DESCRIPTION

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.

Nominal

Input Output Output

Voltage Voltage Current MTTF1

Order Code (V) (V) (mA) (%) (pF) kHrs

NMA2405D 24 5 ±100 70 39 194

NMA2409D 24 9 ±55 80 50 166 DIP

NMA2412D 24 12 ±42 80 65 134

NMA2415D 24 15 ±33 80 95 101

NMA2405S 24 5 ±100 70 39 194

NMA2409S 24 9 ±55 80 50 166 SIP

NMA2412S 24 12 ±42 80 65 134

NMA2415S 24 15 ±33 80 95 101

NMA4805D 48 5 ±100 70 26 206

NMA4809D 48 9 ±55 80 38 174 DIP

NMA4812D 48 12 ±42 80 52 139

NMA4815D 48 15 ±33 80 56 104

NMA4805S 48 5 ±100 70 26 206

NMA4809S 48 9 ±55 80 38 174 SIP

NMA4812S 48 12 ±42 80 52 139

NMA4815S 48 15 ±33 80 56 104

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 Power2TA= 0°C to 70°C 1 W

Voltage Set

Point Accuracy See tolerance envelope

Line Regulation High VIN to low VIN 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 duration31 second

Lead temperature 1.5mm from case for 10 seconds 300°C

Input voltage VIN, NMA24 types 28V

Input voltage VIN, NMA48 types 54V

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.

NMA 24V &48V SERIES

Isolated 1W Dual Output DC-DC Converters

www.dc-dc.com

NMA 24V & 48V SERIES

Isolated 1W 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.

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

PERFORMANCE CHARACTERISTICS

GENERAL CHARACTERISTICS

TEMPERATURE CHARACTERISTICS

PIN CONNECTIONS

Parameter Conditions MIN TYP MAX Units

Isolation Test Voltage Flash tested for 1 second 1000 VDC

Resistance Viso=500VDC 1 GΩ

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

14 Pin DIP

1 GND

7 NC

8 0V

9 +V

11 –V

14 VIN

7 Pin SIP

1 VIN

2 GND

4 –V

5 0V

6 +V

tolerance envelope

+10%

+5%

V nominal +2.5%

-2.5%

-7.5%

10 50 100

Output Load Current (%)

19.50

9.80

MECHANICAL DIMENSIONS

6.80*

15.24 1.092.13

7.62

4.60

3.60

0.55

0.45

0.55

0.45

2.54

19.50

6.00**

10.0

2.00

1.25

12.70

4.60

3.60

2.54

* 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.

14 Pin DIP

We i g h t : 2.3g (24V)

2.9g (48V)

7 Pin SIP

We i g h t : 2.3g (24V)

2.9g (48V)

NMA2405D

XYYWW

NMA2405S

XYYWW

1 2 5 64

0.30

0.20

891114

0.30

0.20

0.55

0.45

temperature derating graph

2.0

1.5

1.0

0.5

–50 0 50 70 100 125 150

Ambient Temperature (°C)

Safe Operating Area