MURATA NDXD2415EC

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NDX Series
OBSOLETE
IIsolated
l t d 77.5W
5W Wide Input Single
gle & Dual Output DC/DC Converters
„
0.2% Typical load regulation
„
1kVDC Isolation
„
Efficiency from 67%
„
5V, 12V, 24V & 48V Nominal input
„
5V, 12V & 15V outputs
„
Power density 0.94W/cm
3
„
Optional remote On/Off
„
UL 94V-0 Package materials
„
No electrolytic capacitors
„
Low noise
„
Custom solutions available
PRODUCT OVERVIEW
The NDX series of DC/DC converters provide
up to 7.5W of output power with single or dual
outputs. Unbalanced loading capability with an
optional input control pin. Input voltages of 5V
(4.5V to 9V), 12V (9V to 18V), 24V (18V to 36V),
and 48V (36V to 75V) with outputs of 5V, 12V
or 15V provided. The device is housed in a 5
sided metal case potted with UL 94V-0 rated
material. The pinout is an industry standard 5
pin arrangement with an additional optional
control pin.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
mA
0.48
0.46
0.51
0.51
0.53
0.53
0.47
0.48
0.075
0.075
0.075
0.176
0.159
0.175
0.15
0.4
0.4
0.08
0.5
0.5
mVp-p
79 110
79 110
55
80
55
80
31
50
31
50
23
40
23
40
24
50
24
50
24
45
24
45
20
40
20
40
20
40
20
40
20
40
20
40
21
45
21
45
15
35
15
35
20
45
20
45
25
55
25
55
30
60
30
60
35
60
35
60
25
55
25
55
30
60
30
60
20
40
20
40
25
45
25
45
22
55
22
55
%
68
68
67
67
77
77
77
77
80
80
80
80
81
81
82
82
67
67
69
69
71
71
73
73
78
78
79
79
75
75
81
81
82
82
77
77
82
82
82
82
pF
55
55
49
49
56
56
53
53
55
55
56
56
58
58
58
58
40
40
42
42
43
43
36
36
41
41
41
41
58
58
56
56
56
56
61
61
57
57
58
58
NCS6 Series
Ripple &Noise3 (Typ.)
Closest Alternative
(click for data sheet)
„
Operating temperature range –40°C to
85°C
A
2.02
2.02
2.02
2.02
0.77
0.77
0.77
0.77
0.38
0.38
0.37
0.37
0.187
0.187
0.187
0.187
1.83
1.83
2.15
2.15
2.69
2.69
0.89
0.89
0.86
0.86
0.86
0.86
0.402
0.402
0.38
0.38
0.38
0.38
0.198
0.198
0.19
0.19
0.19
0.19
Isolation Capacitance
„
Continuous short circuit protection with
current foldback
mA
42
42
46.2
46.2
19.4
19.4
27
27
13.8
13.8
20.6
20.6
8.8
8.8
10.2
10.2
19.4
19.4
33.4
33.4
41.8
41.8
13.2
13.2
15
15
17
17
4.2
4.2
6.3
6.3
7
7
3.6
3.6
5.9
5.9
5.9
5.9
Efficiency (Min.)
„
2:1 Wide range voltage input
625
625
500
500
625
625
500
500
625
625
500
500
625
625
500
500
±600
±600
±312
±312
±250
±250
±750
±750
±312
±312
±250
±250
±750
±750
±312
±312
±250
±250
±750
±750
±312
±312
±250
±250
Ripple &Noise3 (Max.)
„
RoHS compliant
mA
Input Current at
shutdown
156
156
125
125
156
156
125
125
156
156
125
125
156
156
125
125
±150
±150
±78.1
±78.1
±62.5
±62.5
±187
±187
±78.1
±78.1
±62.5
±62.5
±187
±187
±78.1
±78.1
±62.5
±62.5
±187
±187
±78.1
±78.1
±62.5
±62.5
Input Current at 100%
Load
FEATURES
5
5
5
5
12
12
12
12
24
24
24
24
48
48
48
48
5
5
5
5
5
5
12
12
12
12
12
12
24
24
24
24
24
24
48
48
48
48
48
48
Input Current at 0%
Load
Output Current at 25%
Load2
12
12
15
15
12
12
15
15
12
12
15
15
12
12
15
15
±5
±5
±12
±12
±15
±15
±5
±5
±12
±12
±15
±15
±5
±5
±12
±12
±15
±15
±5
±5
±12
±12
±15
±15
V
NDXS0512C
NDXS0512EC
NDXS0515C
NDXS0515EC
NDXS1212C
NDXS1212EC
NDXS1215C
NDXS1215EC
NDXS2412C
NDXS2412EC
NDXS2415C
NDXS2415EC
NDXS4812C
NDXS4812EC
NDXS4815C
NDXS4815EC
NDXD0505C
NDXD0505EC
NDXD0512C
NDXD0512EC
NDXD0515C
NDXD0515EC
NDXD1205C
NDXD1205EC
NDXD1212C
NDXD1212EC
NDXD1215C
NDXD1215EC
NDXD2405C
NDXD2405EC
NDXD2412C
NDXD2412EC
NDXD2415C
NDXD2415EC
NDXD4805C
NDXD4805EC
NDXD4812C
NDXD4812EC
NDXD4815C
NDXD4815EC
Output Current at 100%
Load2
Output Voltage
Order Code1
Nominal Input Voltage
SELECTION GUIDE
NCS6S1212C
NCS6S1212C
NCS6S1215C
NCS6S1215C
NCS6S1212C
NCS6S1212C
NCS6S1215C
NCS6S1215C
NCS6S4812C
NCS6S4812C
NCS6S4815C
NCS6S4815C
NCS6D1205C
NCS6D1205C
NCS6D1212C
NCS6D1212C
NCS6D1215C
NCS6D1215C
NCS6D1205C
NCS6D1205C
NCS6D1212C
NCS6D1212C
NCS6D1215C
NCS6D1215C
NCS6D4805C
NCS6D4805C
NCS6D4812C
NCS6D4812C
NCS6D4815C
NCS6D4815C
1. Suffix ‘EC’ indicates optional CTRL pin is fitted, as indicated in the mechanical dimensions section.
2. Please refer to minimum load application notes section on page 4.
3. See ripple & noise characterisation method.
All specifications typical at TA=25°C, with recommended input/output capacitors (refer to application note), nominal input voltage and
rated output current unless otherwise specified.
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KDC_NDXC.G01 Page 1 of 6
NDX Series
Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters
INPUT CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Units
5V input types
12V input types
24V input types
48V input types
5V input types with 100μF at input
12V input types with 100μF at input
24V input types with 10μF at input
48V input types with 10μF at input
5V input types with 100μF at input
12V input types with 100μF at input
24V input types with 10μF at input
48V input types with 10μF at input
BW=20Hz to 300kHz, with external input/output capacitors
4.5
9
18
36
5
12
24
48
70
18
90
80
115
60
50
54
5
9
18
36
75
V
10
mVrms
Parameter
Conditions
Min.
Typ.
Max.
Units
Rated power
NDXx0505 types
All other types
Voltage set point accuracy
With external input/output capacitors
Line regulation
Low line to high line, with external
input/output capacitors
5V & 12V Input
24V & 48V Input
5V & 12V Input
24V & 48V Input
All types
5V & 12V input
24V & 48V input
All types
±3
±2
0.1
0.04
0.04
0.2
0.2
0.07
6.0
7.5
±5
±5
0.9
0.4
0.4
0.9
0.75
0.20
5V output
3.8
6
12V, 15V output
1.5
5
5V output
2.5
7
12V, 15V output
2.5
5
Typ.
Max.
Single outputs Dual outputs
Voltage range
Reflected ripple current
Ripple & noise1
mA p-p
OUTPUT CHARACTERISTICS
Dual output
Single output
25% total load to 100% total load
With external input/output capacitors
Load regulation
Dual output
Single output
% voltage change on negative output 5V & 12V input
when positive load varies from 25%
to 75% with negative load fixed at
100%
24V & 48V input
Cross regulation
(dual outputs)
W
%
%
%
%
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
(Max. case temperature rise 95°C above ambient)
Lead temperature 1.0mm from case for 10 seconds (to JEDEC
JESD22-B106 ISS C)
2
Minimum output load for specification
Control pin input voltage
Input voltage, NDXD05,
Input voltage, NDXD12, NDXS12 types
Input voltage, NDXD24, NDXS24 types
Input voltage, NDXD48, NDXS48 types
12V, 15V outputs
Continuous
5V output, VIN = nominal, 25ºC Continuous
260°C
25% of rated load on each output
7V
10V
20V
40V
80V
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation test voltage
Resistance
Flash tested for 1 second
Viso = 1kVDC
1000
1
Units
VDC
GΩ
1. See ripple & noise characterisation method
2. Please refer to minimum load application notes section on page 4.
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KDC_NDXC.G01 Page 2 of 6
NDX Series
Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
Min.
100% total load to 25% total load
(Dual Output Types)
100% total load to 25% total load
(Single Output Types)
5V & 12V input
24V & 48V input
5V, 12V & 24V input
48V input
5V, 12V & 15V outputs
Typ.
100
5V outputs
12V & 15V outputs
12V & 15V output
12V & 15V output
680
620
850
600
0.8
0.1
0.8
0.2
7.0
3.0
7.0
3.0
90
90
-0.6
0
-0.6
-0.1
3.0
0.7
3.0
0.3
Module ON (or pin unconnected)
Dual outputs
Control pin input1
Single outputs
Module OFF
Dual outputs
Units
900
100
Single outputs
Max.
kHz
V
mA
V
mA
V
mA
V
mA
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Operation
Storage
Case temperature rise above ambient
Typ.
-40
-50
100% Load, Nom VIN, Still Air
1212, 1215, 2412, 2415, 4812, 4815
0512, 2405, 4805
0505, 0515, 1205
Max.
Units
85
130
35
43
48
°C
MEAN TIME TO FAILURE (MTTF)2
Part Number
0°C
25°C
Units
NDXD2412C
NDXD2415C
NDXD4812C
NDXD4815C
2590
2492
2587
2351
1528
1462
1558
1379
kHrs
1. See application notes on page 4.
2. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260ºC for 10
seconds. The pin termination finish on this product series is a Gold flash (0.05-0.10 micron) over Nickel Preplate.
The series is backward compatible with Sn/Pb soldering systems. For further information, please visit
www.murata-ps.com/rohs
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KDC_NDXC.G01 Page 3 of 6
NDX Series
Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters
APPLICATION NOTES
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.
Value
Input Voltage
5V & 12V
24V & 48V
CIN
100μF, 100V
10μF, 200V
COUT1
COUT2
0.1μF, 25V multi-layer
ceramic
100μF, 25V (low ESR)
Recommended Input & Output Capacitors
+VIN
CIN
+VOUT
NDXSC
-VIN
+VIN
COUT1
COUT2
CIN
COUT1
COUT2
COUT1
COUT2
OV
NDXDC
-VIN
OV
+VOUT
-VOUT
Control Pin
Cross Regulation
Dual Output: This provides an OFF function, which puts the converter into a low
power mode. When the pin is high the converter is OFF. Standard TTL levels can
be used but the maximum high level must not exceed 7.0V. The pin can be left
open for normal operation or at voltage below 0.8V with respect to the -VIN pin.
Single Output: As per dual output, however a series diode must be fitted when
the control pin is used on the single output variants. Recommended diode
1N4148 or similar (direction of fitting is cathode to control pin).
Load regulation is at its best when the positive and negative loads are balanced.
When the loads are asymmetric, the negative output is not as tightly regulated as the
positive output. To meet ripple specification a total minimum load of 25% full load
is required, however, the NDX can be used with much lighter loading at the expense
of increased ripple. A small load of 150mW is required on the negative output to
ensure the maximum negative output voltage is not exceeded. NDX cross regulation
is defined on page 2.
Minimum load
The minimum load for correct operation is 25% of the full rated load across the specified input voltage range. Lower loads may cause a significant increase in output ripple
and may cause the output voltage to exceed its specification transiently during power-down when the input voltage also falls below its rated minimum. A minimum loading
of 30% load is required on NDXD4805 to prevent output voltage rise above specification during power-down.
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test voltage,
applied for a specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NDX series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
For a part holding no specific agency approvals, such as the NDX series, both input and output should normally be maintained within SELV limits i.e. less than 42.4V peak, or
60VDC. The isolation test voltage represents a measure of immunity to transient voltages and the part should never be used as an element of a safety isolation system. The part
could be expected to function correctly with several hundred volts offset applied continuously across the isolation barrier; but then the circuitry on both sides of the barrier must
be regarded as operating at an unsafe voltage and further isolation/insulation systems must form a barrier between these circuits and any user-accessible circuitry according to
safety standard requirements.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials,
construction and environment. The NDX series has an EI ferrite core, with no additional insulation between primary and secondary windings of enameled wire. While parts can be
expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insulation. Any material, including this enamel (typically polyurethane)
is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. We therefore strongly
advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be reduced by 20% from specified test voltage.
This consideration equally applies to agency recognized parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further
insulation system of physical spacing or barriers.
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KDC_NDXC.G01 Page 4 of 6
NDX Series
Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters
CHARACTERISATION TEST METHODS
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration with the inclusion of recommended input and output capacitors.
C1
C2
C3
R1
R2
T1
RLOAD
1μF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter
10μF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC/DC converter with an ESR of less
than 100mΩ at 100 kHz
100nF multilayer ceramic capacitor, general purpose
450Ω resistor, carbon film, +/-1% tolerance
50Ω BNC termination
3T of the coax cable through a ferrite toroid
Resistive load to the maximum power rating of the DC/DC converter. Connections should be made via twisted wires
Measured values are multiplied by 10 to obtain the specified values.
Differential Mode Noise Test Schematic
DC/DC Converter
OSCILLOSCOPE
C1 C2 C3
+
Input
SUPPLY
R1
T1
+
R2
Y INPUT
Output
-
-
R LOAD
Input Reflected Ripple Current Test Method
Input reflected ripple current measurements are performed with the following test configuration with the inclusion of recommended input and output capacitors.
C1
L1
C2
220uF with ESR of <0.1Ω at 100kHz, rated at supply voltage
12uH rated at 150% minimum of the DC current taken by the converter.
The recommended input capacitor for the DC/DC converter.
Current Probe
L
Supply +v
+ Input
C1
Supply
www.murata-ps.com
-v
C2
DC/DC
Converter
Load
- Input
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KDC_NDXC.G01 Page 5 of 6
NDX Series
Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS
1.26 (32.00)
Pin
0.98
(25.00)
1
2
3*
4
5
6
NDXD2412C
XYYWW
0.394
(10.00)
Function
Duals
Singles
-VIN
+VIN
CTRL
+VOUT
OV
-VOUT
-VIN
+VIN
CTRL
+VOUT
No pin
OV
* Optional pin
0.189 (4.8)
0.157 (4.0)
RECOMMENDED FOOTPRINT DETAILS
Ø 0.041 (1.04)
0.035 (0.90)
0.069 (1.75)
Ø 0.063 (1.60)
0.1 (2.54)
HOLES
4
0.00394 (0
*3
2
0.2 (5.08)
5
1
0.400
(10.16)
0.392 (9.96)
0.80
(20.32)
†
6
0.092
(2.34)
0.8
(20.32)
0.23±0.04 (5.84±1.0)
* Optional pin
Weight: 20g
All dimensions in inches ±0.010 (mm 0.25mm) except where stated otherwise.
All pins on a 0.100 (2.54) pitch and within 0.010 (0.25) of true position.
The copper case is connected to the output (-VOUT) pin. Care is needed in the design of this circuit board on which the
converter is mounted. Top side tracks must not contact the edge of the case on the underside of the unit.
Please note that from 2010 onwards you may receive either a blue or a black case finish.
†
Hole not required for single output variants.
All dimensions in inches ±0.010 (mm 0.25mm).
1.362 (34.60)
0.236±0.020 (6.00±0.50)
TUBE OUTLINE DIMENSIONS
0.1 (2.54)
*
0.20 (5.08)
0.732
(18.60)
0.488 (12.40)
0.031±0.006 (0.80±0.15)
All dimensions in inches ±0.010 (mm 0.25mm).
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
www.murata-ps.com/locations
Quantity: 15
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2011 Murata Power Solutions, Inc.
All enquiries: www.murata-ps.com/support
KDC_NDXC.G01 Page 6 of 6