NDY SERIES
Isolated 3W Wide Input DC/DC Converters
SELECTION GUIDE
Typical
Isolation
Capacitance
Min
Efficiency
1
Nominal Rated
Input
Output
Voltage Voltage
Output Current
4
Min Load
Full Load
Input
Current
Full Load
MTTF
3
Order Code
NDY0505
NDY0509
NDY0512
NDY0515
(V)
5
5
5
5
12
12
12
12
24
24
24
24
24
48
48
48
48
48
(V)
5
9
12
15
5
9
12
15
3.3
5
9
12
15
3.3
5
9
12
15
(mA)
100 -150
55-83
42-62
33-50
150
83
62
50
227
150
83
62
50
227
150
83
62
50
(mA)
400- 600
222-333
166-250
133-200
600
333
250
200
909
600
333
250
200
909
600
333
250
200
(mA)
615
563
548
533
362
320
316
308
178
174
156
154
150
87
87
78
77
76
(%)
66
72
71
73
71
78
78
79
70
70
78
80
82
71
73
80
81
81
(pF)
40
52
43
44
36
52
44
47
30
36
52
44
54
30
35
52
44
53
kHrs
1939
1926
1907
1924
1928
1916
1897
1914
1671
1673
1663
1644
1657
1676
1668
1663
1648
1661
FEATURES
■
Industry Standard Footprint
■
Single Isolated Output
■
Short Circuit Protection
■
Operating Temperature Range
-40°C to +85°C
■
Low Profile 24 Pin Case
■
Efficiency to 82%
■
Power Density 0.90W/cm
3
■
2:1 Wide Input Range
■
5V, 12V, 24V & 48V Input
■
3.3V, 5V, 9V, 12V & 15V Output
■
Footprint 4.73cm
2
■
UL 94V-0 Package Materials
■
No Heatsink Required
■
Internal SMD Construction
■
Fully Encapsulated
■
Lead Free Compatible
DESCRIPTION
The NDY series is a range of low profile
DC/DC converters offering a single regulated
output over a 2:1 input voltage range. All
parts deliver 3W output power up to 85°C
without heatsinking, except the 4.5V to 9V
input voltage range which should be derated
to 2W at the lower input voltage. A flyback
oscillator design with isolated feedback is
used to give regulation over the full operating
range of 25% to 100% of full load. It is
strongly recommended that external
capacitors be used on input and output to
guarantee performance over full load and
input voltage range (see recommended filter
circuit for values). The plastic case and
encapsulant materials are rated to UL 94V-0
and the connection pins are formed from a
tin plated alloy 42 leadframe.
NDY1205
NDY1209
NDY1212
NDY1215
NDY2403
NDY2405
NDY2409
NDY2412
NDY2415
NDY4803
NDY4805
NDY4809
NDY4812
NDY4815
INPUT CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Voltage Range
Reflected
1
Ripple
Current
All NDY05XX
All NDY12XX
All NDY24XX
All NDY48XX
NDY2403
2
NDY4803
2
All NDY05XX
All NDY12XX
All other NDY24XX
All other NDY48XX
4.5
9
18
36
5
12
24
48
180
140
400
150
290
100
9
18
36
72
360
290
500
170
360
127
VDC
mA p-p
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
Input voltage 05 types
Input voltage 12 types
Input voltage 24 types
Input voltage 48 types
Lead temperature 1.5mm from case for 10 seconds
Minimum Load
Internal Dissipation
continuous
10V
20V
40V
80V
300°C
25% of rated load
1.7W
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1 Measured at full load with external input/output capacitors, refer to filter circuit 1.
2 For lower ripple refer to filter circuit 2.
3 Calculated using MIL-HDBK-217F with nominal input voltage at full load.
4 Refer to power derating graph.
All specifications typical at T
A
=25°C, nominal input voltage and rated output current unless otherwise specified.
NDY SERIES
Isolated 3W Wide Input DC/DC Converters
OUTPUT CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Voltage Set Point Accuracy
Line Regulation
Load Regulation
Ripple
2
Noise
With external input/output capacitors, refer to filter circuits
Low line to high line, 3.3V output with external input/output capacitors,
refer to filter circuit 1
Low line to high line, with external input/output capacitors,
refer to filter circuit 1
25% load to 100% load, 3.3V output with external input/output capacitors,
refer to filter circuit 1
25% load to 100% load, with external input/output capacitors,
refer to filter circuit 1
BW = 20Hz to 300kHz. 3.3V output with external input/output capacitors,
refer to filter circuit 1
BW = 20Hz to 300kHz. With external input/output capacitors,
refer to filter circuit 1
BW = DC to 100MHz. 3.3V output with external input/output capacitors,
refer to filter circuit 1
BW = DC to 100MHz. With external input/output capacitors,
refer to filter circuit 1
±1
0.05
0.05
0.6
0.2
80
5
±5
0.2
0.5
0.5
0.5
120
10
180
%
%
%
%
%
mV rms
mV rms
mV p-p
mV p-p
50
100
ISOLATION CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Isolation Test Voltage
Resistance
Flash tested for 1 second
Viso=500VDC
1000
1
VDC
GΩ
GENERAL CHARACTERISTICS
Parameter
Conditions
MIN
TYP
MAX
Units
Switching Frequency
100% load V
IN
nominal 3.3V output
25% load V
IN
nominal 3.3V output
100% load V
IN
nominal
25% load V
IN
nominal
160
290
80
290
220
560
220
560
kHz
MECHANICAL DIMENSIONS
1.27 (32.26)
PIN CONNECTIONS (TOP VIEW)
VIN
0.577
(14.66)
1
24
VIN
0.275
(7.00)
0V
+V
0.185 (4.70)
0.145 (3.70)
0.033 (0.84)
0.021 (0.54)
1.10 (27.94)
Weight: 6.2g (3.3V O/P 6.7g)
10
11
12
15
14
13
0V
+V
GND
0.10
(2.54)
0.012 (0.30)
0.008 (0.20)
0.644
(16.35) Max
GND
1 Measured at full load with external input/output capacitors, refer to filter circuit 1.
2 For lower ripple refer to filter circuit 2.
3 Calculated using MIL-HDBK-217F with nominal input voltage at full load.
4 Refer to power derating graph.
All specifications typical at T
A
=25°C, nominal input voltage and rated output current unless otherwise specified.
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NDY SERIES
Isolated 3W Wide Input DC/DC Converters
FILTER CIRCUITS
EXTERNAL CAPACITANCE
Although these converters will work without
external capacitors, they are necessary in
order to guarantee the full parametric
performance over the full line and load
range. All parts have been tested and
characterised using the following values and
test circuit.
C
IN
Value
C
OUT
L
OUT
10µF, 200V
Philips Part Number
151621809 or any
good low esr capacitor
100µF, 25V
Philips Part Number
13556101 or any good
low esr capacitor
C&D Technologies Part
No 24100
FILTER CIRCUIT 1
V
IN
+V
OUT
C
IN
NDY
C
OUT
OUTPUT LOAD
The minimum rated load across the whole
input voltage range is 25% of the full load
output. It is important to take care that the
load does not fall below this as the output
ripple will greatly increase. While this
condition will not harm the device the
resultant increase in output ripple could cause
customers’ application to malfunction.
GND
OV
FILTER CIRCUIT 2
Recommended circuit for reduced ripple 3.3V O/P
V
IN
L
OUT
+V
OUT
C
IN
NDY
C
OUT
GND
OV
ENVIRONMENTAL
Parameter
Conditions
MIN
TYP
MAX
Units
Operation
Storage
Cooling
-40
-50
Free air convection
85
130
°C
°C
NDY05 POWER DERATING CURVE
5
Output Power (W)
4
3
2
1
0
4.5 5
6
7
Input Voltage (V)
8
9
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 2003
NDC NDY.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.cdpoweronline.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.cdpoweronline.com
C&D Technologies Inc.
3400 E Britannia Drive, Tucson,
Arizona 85706, USA
Tel: +1 (800) 547-2537
Fax: +1 (520) 741-4598
email: sales@cdtechno.com
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