SELECTION GUIDE
FEATURES
s
2:1 Wide Range Voltage Input
s
Continuous Short Circuit Protection
with Current Foldback
s
Operating Temperature Range
40C to 85C
s
0.5% Regulation
s
1kVDC Isolation
s
Efficiency to 83%
s
5V, 12V, 24V & 48V Nominal Input
s
5V, 9V, 12V & 15V Output
s
Power Density 0.9W/cm
3
s
External Control
s
No Electrolytic Capacitors
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Low Noise
s
Fully Encapsulated
DESCRIPTION
The NDL series is a range of high
performance miniature DC-DC converters
having regulated outputs over the wide
temperature range of 40C to 85C. The
input voltage range is 2:1 with the output
power at 2 watts and the input to output
isolation is 1kVDC. Continuous short circuit
protection, external control and extremely
small SIP packaging provide state of the art
functionality. The use of ceramic capacitors
and a ceramic substrate, with a tough chip
and wire bonded MOSFET power transistor
die and SMD construction, provide genuine
high reliability. Nominal input voltages of
5,12,24 and 48V with output voltages of
5,9,12 and 15V are available as standard
with custom parts on request. The plastic case
is rated to UL 94V-0 with encapsulant to UL
94V-1. Connection pins are phosphor bronze
with a 60/40 tin lead solder dipped finish.
Nominal Rated
Input
Input
Output
Output Current
1
Current
2
Voltage Voltage
Min Load
3
Full Load
Full Load
MTTF
4
Order Code
(V)
(V)
(mA)
(mA)
(mA)
(%)
(pF)
kHrs
NDL0505S
5
5
100
400
606
66
26
2015
NDL0509S
5
9
55
222
558
71
27
1998
NDL0512S
5
12
42
167
559
71
26
1980
NDL0515S
5
15
33
134
549
73
27
1965
NDL1205S
12
5
100
400
228
73
39
1994
NDL1209S
12
9
55
222
211
79
38
1981
NDL1212S
12
12
42
167
208
80
47
1961
NDL1215S
12
15
33
134
206
81
47
1947
NDL2405S
24
5
100
400
112
74
37
1722
NDL2409S
24
9
55
222
102
81
40
1711
NDL2412S
24
12
42
167
100
81
51
1696
NDL2415S
24
15
33
134
100
83
58
1685
NDL4805S
48
5
100
400
57
73
39
1719
NDL4809S
48
9
55
222
52
80
40
1709
NDL4812S
48
12
42
167
51
81
53
1694
NDL4815S
48
15
33
134
51
82
65
1683
Parameter
Conditions
MIN
TYP
MAX
Units
All NDL05 Types
4.5
5
9
Voltage Range
All NDL12 Types
9
12
18
VDC
All NDL24 Types
18
24
36
All NDL48 Types
36
48
72
Reflected
All NDL05 types when 100F at input
250
Ripple
All NDL12 types when 100F at input
150
mA p-p
Current
All NDL24 types when 10F at input
300
380
All NDL48 types when 10F at input
140
170
Parameter
Conditions
5
TYP
MAX
Units
All NDL 05/12 types with external
1
5
Voltage Set
input/output capacitors
%
Point Accuracy
All NDL 24/48 types with external
2
5
input/output capacitors
All NDL 05/12 types, Low line to high line,
Line Regulation
With external input/output capacitors
0.05
0.5
%
All NDL 24/48 types, Low line to high l i n e ,
With external input/output capacitors
0.04
0.4
All NDL 05/12 types, Minimum load to rated load,
Load Regulation
With external input/output capacitors
0.2
0.75
%
All NDL 24/48 types, Minimum load to rated load,
With external input/output capacitors
0.2
0.75
Ripple
B/W=20Hz to 300kHz
mV rms
With external input/output capacitors
5
10
All NDL 05 types, B/W=DC to 100MHz
With external input/output capacitors
20
35
Noise
All NDL 12 types, B/W=DC to 100MHz
mV p-p
With external input/output capacitors
110
170
All NDL 24/48 types, B/W=DC to 100MHz
With external input/output capacitors
50
100
Shutdown Power V
IN
nominal
2.8
mW
INPUT CHARACTERISTICS
OUTPUT CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
1 Refer to power derating graph for operation of 5V input types at 4.5 to 6V.
2 Measured at full load with external input/output capacitors, refer to recommended test circuit.
3 A lower load condition is entirely safe but higher levels of output ripple will be experienced.
4 Calculated using MIL-HDBK-217F with nominal input voltage at full load.
5 Refer to recommended test circuit for external input/output capacitors.
All specifications typical at T
A
=25C, nominal input voltage and rated output current unless otherwise specified.
Short-circuit protection
continuous
Lead temperature 1.5mm from case for 10 seconds
300C
Control pin input current
10mA
Input voltage 05 types
10V
Input voltage 12 types
20V
Input voltage 24 types
40V
Input voltage 48 types
80V
NDL SERIES
Isolated 2W Wide Input Single Output DC-DC Converters
www.dc-dc.com
NDL SERIES
Isolated 2W Wide Input 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.
3400 E Britannia Drive, Tucson,
Arizona 85706, USA
Tel: +1 (800) 547-2537
Fax: +1 (520) 741-4598
email: sales@cdtechno.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 2002
NDC NDL.4
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
RECOMMENDED TEST CIRCUIT
NDL05 POWER DERATING CURVE
Parameter
Conditions
MIN
TYP
MAX
Units
Isolation Test Voltage
Flash tested for 1 second
1000
VDC
Resistance
Viso=1000VDC
1
G
Parameter
Conditions
MIN
TYP
MAX
Units
Swiching Frequency
MAX rated load to MIN rated load 100
600
kHz
Control Pin (CTRL)
Control voltage applied via 1k0 resistor,
Input Current
output voltage must reduce to 0V
4.0
6.0
mA
NDL
C
OUT
C
IN
V
IN
+V
OUT
GND
5V & 12V: C
IN
100F, 25V Philips Part No.13556101
24V & 48V: C
IN
10F, 200V Philips Part No.15162109
100F, 25V
Philips Part No.
13556101
OV
2.5
2.0
1.5
1.0
0.5
0
1.75
4.5 5
6
7
8
9
Input Voltage (V)
21.80
9.20
11.10
4.60
3.60
0.55
0.45
MECHANICAL DIMENSIONS
2.54
3.20
0.30 max
0.20 min
2.010.50
NDL4805S
XYYWW
ENVIRONMENTAL
Parameter
Conditions
MIN
TYP
MAX
Units
Operation
-40
85
C
Storage
-50
130
C
Cooling
Free air convection
1 2
3
5
6
7
8
PIN
1
GND
2
V
IN
3
CTRL
5*
IC
6
+V
OUT
7
0V
8
C
S
Weight: 5.0g
*Pin 5 is internally connected and must have no external connection
All dimensions in mm XX.XX 0.25mm. All pins on a 2.54mm pitch and
within 0.25mm of true position.
CTRL (PIN 3)
Provides an on/off function. The converter
is on when CTRL is not connected or high
impedance (Z). The CTRL pin will turn the
converter off as indicated in general
characteristics.
CS (PIN 8)
Additional capacitance, up to 100uF can be
added from CS to pin 7. A low ESR
capacitor if fitted will precede the output filter
inductor and will improve ripple and noise.
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