NDS6 Series - power, Murata

NDS6 Series
www.murata-ps.com
Isolated 6W Wide Input Single & Dual Output DC/DC Converters
SELECTION GUIDE
2
Order Code
FEATURES
„
UL 60950 recognized
„
RoHS compliant
Input
Voltage Output
Voltage
Nom.
NDS6D2405C
NDS6D2412C
NDS6D2415C
NDS6S2405C
NDS6S2412C
NDS6S2415C
Output Current
V
V
Min.
Load
A
24
24
24
24
24
24
±5
±12
±15
5
12
15
±0.06
±0.025
±0.020
0.12
0.05
0.04
Input Current
Efficiency
Ripple
100% Shut & Noise
Min. Typ.
Load Down
mA
mA mV p-p %
%
±100% 0%
Load Load
A
mA
±0.6
±0.250
±0.200
1.2
0.5
0.4
„
2:1 Wide range voltage input
INPUT CHARACTERISTICS
„
Operating temperature range
–40°C to 85°C
Parameter
Conditions
Voltage range
Reflected ripple current
All NDS6D24 & NDS6S24 types
All NDS6D24 & NDS6S24 types
7
7
7
4
5.5
6
300
290
290
305
290
290
1.1
1.1
1.1
1.1
1.1
1.1
40
40
45
40
40
40
80
85
85
80
84
85
MTTF1
kHrs
82
87
87
82
86
87
Min.
Typ.
Max.
Units
18
24
7
36
V
mA p-p
Min.
Typ.
Max.
Units
6
W
„
Short circuit protection
„
0.2% Typical load regulation
OUTPUT CHARACTERISTICS
„
1.5kVDC Isolation ‘Hi-Pot Test’
Rated power
„
24V Nominal input
Parameter
Voltage set point accuracy
„
Single & dual outputs
„
Power density 0.94W/cm3
„
Optional remote On/Off
Line regulation
Conditions
Positive & negative except NDS6D2405 negative
output
±2
NDS6D2405 negative output
±4
Load regulation
0.01
0.1
Negative outputs
0.02
0.2
5V outputs
0.2
1.7
12V & 15V outputs
0.2
1
%
Low line to high line
„
UL 94V-0 Package materials
„
No electrolytic capacitors
Positive outputs
10% total load to
100% total load
%
„
Low noise
PRODUCT OVERVIEW
The NDS6 series of DC/DC converters offer single
and dual output voltages from an input voltage
range of 18-36V. The NDS6 is housed in an industry standard package with a standard pinout. The
NDS6 is packaged in a metal case for improved
EMI shielding and is also encapsulated for superior thermal performance. Versions with optional
remote on/off control pin are also available.
Applications include telecommunications, battery
powered systems, process control and distributed
power systems.
Cross regulation
%
% voltage change on negative output
when positive load varies from 12.5%
(0.75W) to 37.5% (2.25W) with
negative load fixed at 50% (3W)
5V
5
12V & 15V
2
%
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation test voltage
Resistance
Capacitance
Flash tested for 1 second
Viso = 1kVDC
1500
1
Typ.
225
Max.
Units
VDC
GΩ
pF
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
Internal power dissipation
Lead temperature 1.0mm from case for 10 seconds (to JEDEC JESD22-B106 ISS C)
Minimum output load for specification3
Control pin input voltage
Input voltage, NDS6 24V input types
Continuous
2.7W
260°C
10% of rated load on each output
±18V
40V
1 Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2 To order with optional control pin, prefix C with “E”. For example NDS6D0505EC.
3 Operation below 10% minimum load may cause increased output ripple.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
For full details go to
www.murata-ps.com/rohs
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KDC_NDS6.E01 Page 1 of 6
NDS6 Series
Isolated 6W Wide Input Single & Dual Output DC/DC Converters
GENERAL CHARACTERISTICS1
Parameter
Conditions
Min.
Switching frequency
Typ.
Max.
Units
0
0.8
1.5
kHz
V
mA
V
mA
Max.
Units
130
3.0
Module ON (or pin unconnected)
Control pin input
Module OFF
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Operation
Storage
Typ.
-40
-50
Case temperature rise above ambient
100% Load, Nom VIN, Still Air,
Thermal shutdown
Case Temperature
5V
12V & 15V
85
130
29
22
110
°C
APPLICATION NOTES
Control Pin
NDS6D Cross Regulation
This provides an OFF function, which puts the converter into a low
power mode, when the voltage applied to the pin is less than 0.8V.
When the pin is high or un-connected, the converter is on.
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
datasheet specification, a minimum load of 10% of output load current is required on each output.
The NDS6D can be used with much lighter loading but the negative output voltage may rise above
maximum datasheet specification.
Output Capacitors
The NDS6 series does not require output capacitors to meet datasheet specification. To meet datasheet specification, output capacitance should not exceed:
Output Voltage (V)
5
12
15
Output Capacitance (μF)
470
470
220
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 NDS6 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1.5kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The NDS6 has been recognized by Underwriters Laboratory for functional isolation. 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 NDS6 series has an ER 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_NDS6.E01 Page 2 of 6
NDS6 Series
Isolated 6W Wide Input Single & Dual Output DC/DC Converters
SAFETY APPROVAL
The NDS6 series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum ambient temperature of 85ºC and/or case temperature
limit of 120ºC (case temperature measured on the face opposite the pins). File number E151252 applies.
Note: This series gained UL 60950 recognition for products manufactured on or after datecode G1148, any NDS6 parts manufactured before this date code should not be considered UL 60950 recognized. Any NDS6 that is UL recognized will be printed with the UL logo.
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
CHARACTERISATION TEST METHODS
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1
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
C2
C3
R1
R2
T1
RLOAD
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
R2
T1
+
Y INPUT
Output
-
R LOAD
EFFICIENCY VS LOAD
NDS 24V Input, Dual Output
90
80
80
15V
60
Efficiency (%)
90
70
Efficiency (%)
NDS 24V Input, Single Output
12V
5V
50
40
15V
70
12V
60
5V
50
40
30
30
20
20
10
10
0
0
0
10
20
30
40
50
60
Load (%)
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
Load (%)
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KDC_NDS6.E01 Page 3 of 6
NDS6 Series
Isolated 6W Wide Input Single & Dual Output DC/DC Converters
TEMPERATURE DERATING
NDS6D2405C
7
7
6
6
600 lfm
500 lfm
300 lfm
400 lfm
4
200 lfm
3
100 lfm
2
still air
5
Output Power (W)
5
Output Power (W)
NDS6D2412C
600 lfm
500 lfm
400 lfm
4
2
1
0
0
-40 -30 -20 -10
0
10
20
30
40
50
60
70
80
-40 -30 -20 -10
0
10
20
30
40
50
60
70
80
Ambient Temperature (ºC)
Ambient Temperature (ºC)
NDS6D2415C
NDS6S2405C
7
7
6
6
600 lfm
500 lfm
200 lfm
300 lfm
400 lfm
100 lfm
4
still air
3
2
Output Power (W)
Output Power (W)
100 lfm
still air
3
1
5
300 lfm 200 lfm
600 lfm
500 lfm
5
200 lfm
400 lfm
300 lfm
4
100 lfm
3
2
still air
1
1
0
0
-40 -30 -20 -10
0
10
20
30
40
50
60
70
-40 -30 -20 -10
80
NDS6S2412C
30
40
50
60
70
80
6
600 lfm 500 lfm
300 lfm
400 lfm
200 lfm
100 lfm
4
3
still air
Output Power (W)
Output Power (W)
20
7
6
5 600 lfm 500 lfm 400 lfm 300 lfm
200 lfm 100 lfm
4
still air
3
2
2
1
1
0
10
NDS6S2415C
7
5
0
Ambient Temperature (ºC)
Ambient Temperature (ºC)
-40 -30 -20 -10
0
10
20
30
40
Ambient Temperature (ºC)
50
60
70
80
0
-40 -30 -20 -10 0
10
20
30
40
50
60
70
80
Ambient Temperature (ºC)
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KDC_NDS6.E01 Page 4 of 6
NDS6 Series
Isolated 6W Wide Input Single & Dual Output DC/DC Converters
EMC FILTERING AND SPECTRA
FILTERING
The module includes a basic level of filtering, typically sufficient to meet EN 55022 Curve A Quasi-Peak EMC limit, as shown in the following plots.
NDS6S2405C
NDS6S2412C
90
C onducted E mis s ions (dB uV )
C onducted E mis s ions (dB uV )
90
80
70
60
50
40
30
60
50
40
30
20
10
10
1000000
10000000
0
100000
100000000
F requency (Hz)
NDS6S2415C
C onducted E mis s ions (dB uV )
70
60
50
40
30
10000000
100000000
10000000
100000000
10000000
100000000
80
70
60
50
40
30
20
20
10
10
1000000
F requency (Hz)
10000000
0
100000
100000000
NDS6D2412C
1000000
F requency (Hz)
NDS6D2415C
90
C onducted E mis s ions (dB uV )
90
80
70
60
50
40
30
80
70
60
50
40
30
20
20
10
10
0
100000
F requency (Hz)
90
80
0
100000
1000000
NDS6D2405C
90
C onducted E mis s ions (dB uV )
70
20
0
100000
C onducted E mis s ions (dB uV )
80
1000000
F requency (Hz)
10000000
100000000
0
100000
1000000
F requency (Hz)
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KDC_NDS6.E01 Page 5 of 6
NDS6 Series
Isolated 6W Wide Input Single & Dual Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS
NDS6xxxxxC
2
3
5*
9
11
14
16
22
23
XYYWW
0.787
(20.0)
Function
Pin
1.26 (32.0)
Single
Dual
-VIN
-VIN
On/Off
No pin
N/C
+VOUT
-VOUT
+VIN
+VIN
-VIN
-VIN
On/Off
OV
-VOUT
+VOUT
OV
+VIN
+VIN
* Optional pin
TUBE OUTLINE DIMENSIONS
0.394 (10.0)
0.256
(6.50)
1.00±0.15 (0.04±0.006)
23.0 (0.906)
0.02 (0.5)
8.5 (0.335)
0.0177-0.0217 (0.45-0.55)
20.5 (0.807)
0.600 (15.24)
Tube length 520 (20.47)
All dimensions in mm ±0.25mm (inches ±0.010).
0.200
(5.08)
0.200 (5.08)
2
3
0.093
(2.36)
*
5
9
Quantity: 15
RECOMMENDED FOOTPRINT DETAILS
11
8 HOLES
0.600
(15.24)
0.039 (1.0)
Ø
23
0.1 (2.54)
22
0.100 (2.54)
16
14
0.180 (4.57)
*
Weight: 16.4g Typ.
All dimensions in mm (inches) ± 0.5 (0.020) except pin to pin tolerance ± 0.25 (0.010).
All pins on a 2.54 (0.100) pitch and within 0.25 (0.010) of true position.
0.1 (2.54)
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.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
* Optional pin
All dimensions in mm ±0.25mm (inches ±0.010).
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
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.
© 2015 Murata Power Solutions, Inc.
www.murata-ps.com/support
KDC_NDS6.E01 Page 6 of 6