NKE Series - power, Murata

NKE Series
www.murata-ps.com
Isolated Sub-Miniature 1W Single Output DC/DC Converters
SELECTION GUIDE
Order Code
FEATURES
RoHS Compliant
„
Sub-Miniature SIP & DIP Styles
„
3kVDC Isolation
„
UL Recognised
„
Wide Temperature performance at full
„
1 Watt load, –40°C to 85°C
Increased Power Density to 2.09W/cm3
„
UL 94V-0 Package Material
„
Footprint at 0.69cm2
„
Industry Standard Pinout
„
3.3V, 5V & 12V Input
„
3.3V, 5V, 9V, 12V and 15V Output
„
Internal SMD Construction
„
Fully Encapsulated with Toroidal
„
Magnetics
MTTF up to 2.4 Million hours
„
Custom Solutions Available
„
No Electrolytic or Tantalum Capacitors
„
NKE0303DC
NKE0305DC
NKE0309DC
NKE0303SC
NKE0305SC
NKE0309SC
NKE0503DC
NKE0505DC
NKE0505DEC
NKE0509DC
NKE0512DC
NKE0515DC
NKE0503SC
NKE0505SC
NKE0505SEC
NKE0509SC
NKE0512SC
NKE0515SC
NKE1205DC
NKE1209DC
NKE1212DC
NKE1215DC
NKE1205SC
NKE1209SC
NKE1212SC
NKE1215SC
Nominal
Input
Voltage
Output
Voltage
Output
Current
Input
Current at
Rated Load
V
V
mA
mA
3.3
3.3
3.3
3.3
3.3
3.3
5
5
5
5
5
5
5
5
5
5
5
5
12
12
12
12
12
12
12
12
3.3
5
9
3.3
5
9
3.3
5
5
9
12
15
3.3
5
5
9
12
15
5
9
12
15
5
9
12
15
303
200
111
303
200
111
303
200
200
111
83
66
303
200
200
111
83
66
200
111
83
66
200
111
83
66
400
400
403
400
400
403
270
289
250
266
260
256
270
289
250
266
260
256
117
107
105
103
117
107
105
103
Isolation
MTTF1
Capacitance
Efficiency
%
Min.
Typ.
68
72
71
68
72
71
70
66
73
72
73
74
70
66
73
72
73
74
68
72
73
76
68
72
73
76
72
75
74
72
75
74
74
69
77
75
78
78
74
69
77
75
78
78
72
78
79
81
72
78
79
81
pF
kHrs
30
35
30
30
35
30
40
28
34
29
30
32
40
28
34
29
30
32
35
50
57
60
35
50
57
60
1234
632
1204
1234
632
1204
619
2414
419
1173
633
360
619
2414
419
1173
633
360
620
488
360
252
620
488
360
252
Package
Style
DIP
SIP
DIP
SIP
DIP
SIP
NKE0505SEC/NKE0505DEC offers higher efficiency than NKE0505SC/NKE0505DC but over a narrower operating temperature range.
See temperature characteristics graph.
INPUT CHARACTERISTICS
PRODUCT OVERVIEW
The NKE sub-miniature series of DC/DC Converters
is particularly suited to isolating and/or converting
DC power rails. A smaller package size, improved
efficiency, lower output ripple and 3kVDC isolation
capability through state of the art packaging and
improved technology. The galvanic isolation allows
the device to be configured to provide an isolated
negative rail in systems where only positive rails
exist. The wide temperature range guarantees
startup from –40°C and full 1 watt output at 85°C.
Parameter
Voltage range
Reflected ripple current
Conditions
Min.
Typ.
Max.
Continuous operation, 3.3V input types
Continuous operation, 5V input types
Continuous operation, 12V input types
3.3V input types
2.97
4.5
10.8
3.3
5.0
12.0
40
3.63
5.5
13.2
60
Units
V
mA p-p
ABSOLUTE MAXIMUM RATINGS
Lead temperature 1.5mm from case for 10 seconds
Internal power dissipation
Input voltage VIN, NKE03 types
Input voltage VIN, NKE05 types
Input voltage VIN, NKE12 types
260°C
530mW
5.5V
7V
15V
1. 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.
For full details go to
www.murata-ps.com/rohs
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KDC_NKE.K06 Page 1 of 7
NKE Series
Isolated Sub-Miniature 1W Single Output DC/DC Converters
OUTPUT CHARACTERISTICS
Parameter
Conditions
Rated Power
Voltage Set Point Accuracy
Line regulation
TA=-40°C to 120°C, see derating graphs
See tolerance envelope
High VIN to low VIN
10% load to rated load, 3.3V output types & 0309
10% load to rated load, 5V output types
10% load to rated load, 9V output types
10% load to rated load, 12V output types
10% load to rated load, 15V output types
BW=DC to 20MHz, 3.3V output types & 0305, 0505SEC, 0505DEC
BW=DC to 20MHz, other 5V output types
BW=DC to 20MHz, 9V output types
BW=DC to 20MHz, 12V output types
BW=DC to 20MHz, 15V output types
Load Regulation1
Ripple and Noise
Min.
Typ.
Max.
Units
1.0
W
1.0
10
12
7.5
6.5
6.0
40
77
43
35
32
1.2
15
15
10
9.5
8.5
80
100
90
65
55
%/%
Typ.
Max.
%
mV p-p
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation test voltage
Resistance
Flash tested for 1 second
Viso= 1000VDC
3000
Parameter
Conditions
Min.
Switching frequency
All output types
Units
VDC
GΩ
10
GENERAL CHARACTERISTICS
Typ.
Max.
115
Units
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Specification
Storage
All output types
-40
-50
Case temperature rise above
ambient
Cooling
0505D/S, 1205D/S
All other output types
Free air convection
Typ.
Max.
Units
85
130
41
32
°C
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 NKE series of dc/dc converters are all 100% production tested at their stated isolation voltage. This is 3000V DC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The NKE series has been recognized by Underwriters Laboratory for functional insulation. 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. While manufactured parts can 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.
SAFETY APPROVAL
The NKE 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 130ºC. Case temperature measured on the face opposite the pins. File number E151252 applies.
1. 12V input types have typically 3% less load regulation.
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KDC_NKE.K06 Page 2 of 7
NKE Series
Isolated Sub-Miniature 1W Single Output DC/DC Converters
TEMPERATURE DERATING GRAPHS
85°C
1.0
0.5
0
-40
1.5
All other types.
Output Power (W)
UL recognition to a
maximum ambient
temperature of 85ºC and/
or case temperature limit of
130ºC.
1.5
Output Power (W)
NKE 0303DC/SC, 0305DC/
SC, 0309DC/SC, 0503DC/SC,
0505DEC/SEC types only.
Safe Operating Area
100
50
0
Ambient Temperature (°C)
0.5
Safe Operating Area
120°C
0
-40
150
85°C
1.0
100
50
0
Ambient Temperature (°C)
150
TOLERANCE ENVELOPES
All other types.
+9%
+1%
Output Voltage
VNOM
Typical
L
oad Lin
e
-15%
10
75
50
25
Output Load Current (%)
+5%
VNOM
+1%
-7%
-7%
+10%
100
Output Voltage
3.3V output types.
Typical
L
oad Line
+2.5%
-2.5%
-7.5%
10
75
50
25
Output Load Current (%)
100
The voltage tolerance envelope shows typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to
changes in output loading.
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KDC_NKE.K06 Page 3 of 7
NKE Series
Isolated Sub-Miniature 1W Single Output DC/DC Converters
APPLICATION NOTES
Minimum load
The minimum load to meet datasheet specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading will result in
an increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 5%.
Capacitive loading and start up
Typical start up times for this series, with a typical input voltage rise time of 2.2μs and output capacitance of 10μF, are shown in the table below. The product
series will start into a capacitance of 47μF with an increased start time, however, the maximum recommended output capacitance is 10μF.
Typical Start-Up Wave Form
NKE0303SC
NKE0305SC
NKE0309SC
NKE0503SC
NKE0505SC
NKE0505SEC
NKE0509SC
Start-up time
μs
544
1306
5250
496
1075
894
3140
NKE0512SC
NKE0515SC
NKE1205SC
NKE1209SC
NKE1212SC
NKE1215SC
Start-up time
μs
5040
9940
1671
2835
5295
8475
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
C2
than 100mΩ at 100 kHz
C3
100nF multilayer ceramic capacitor, general purpose
R1
450Ω resistor, carbon film, ±1% tolerance
R2
50Ω BNC termination
T1
3T of the coax cable through a ferrite toroid
RLOAD
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
+
SUPPLY
Input
-
+
R1
T1
R2
Y INPUT
Output
-
R LOAD
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KDC_NKE.K06 Page 4 of 7
NKE Series
Isolated Sub-Miniature 1W Single Output DC/DC Converters
APPLICATION NOTES (continued)
Output Ripple Reduction
By using the values of inductance and capacitance stated, the output ripple at the rated load is lowered to 5mV p-p max.
Component selection
Capacitor: It is required that the ESR (Equivalent Series Resistance) should be as low as possible, ceramic types are recommended.
The voltage rating should be at least twice (except for 15V output), the rated output voltage of the DC/DC converter.
Inductor: The rated current of the inductor should not be less than that of the output of the DC/DC converter. At the rated current, the DC resistance of the inductor
should be such that the voltage drop across the inductor is <2% of the rated voltage of the DC/DC converter. The SRF (Self Resonant Frequency) should be
>20MHz.
L
DC
Power
Source
NKE0303xC
NKE0305xC
NKE0309xC
NKE0503xC
NKE0505xC
NKE0505xEC
NKE0509SC
NKE0512xC
NKE0515xC
NKE1205xC
NKE1209xC
NKE1212xC
NKE1215xC
L, μH
10
47
47
10
47
47
47
68
100
47
47
68
100
Inductor
SMD
82103C
82473C
82473C
82103C
82473C
82473C
82473C
82683C
82104C
82473C
82473C
82683C
82104C
C
Load
DC
Through Hole
11R103C
11R473C
11R473C
11R103C
11R473C
11R473C
11R473C
11R683C
11R104C
11R473C
11R473C
11R683C
11R104C
Capacitor
C, μF
4.7μF
4.7μF
1μF
4.7μF
4.7μF
4.7μF
1μF
0.68μF
2.2μF
4.7μF
1μF
0.47μF
2.2μF
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KDC_NKE.K06 Page 5 of 7
NKE Series
Isolated Sub-Miniature 1W Single Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS - 8 PIN DIP
DIP Package
SIP Package
Pin
0.45
(11.48)
0.386 (9.80)
NKE0505DC
0.236
(6.00)
XYYWW
-VIN
4
+VIN
5
+VOUT
7
-VOUT
PIN CONNECTIONS - 4 PIN SIP
0.453 (11.50)
Pin
0.212 (5.40)
0.293
(7.46)
NKE0505SC
XYYWW
0.181 (4.60)
0.142 (3.60)
1
0.0196±0.00196
(0.50±0.05)
1
0.181 (4.60)
0.142 (3.60)
2
3
0.3 (7.62)
-VIN
2
+VIN
3
-VOUT
4
+VOUT
0.0118 (0.30)
0.0078 (0.20)
0.049
(1.25)
5
0.0118 (0.30)
0.0078 (0.20)
Function
1
0.0196±0.00196
(0.50±0.05)
0.086±0.0197
(2.18±0.50)
4
0.022 (0.55)
0.018 (0.45)
4
0.1 (2.54)
0.043 (1.09)
7
Function
1
0.2 (5.08)
0.3 (7.62)
0.3
(7.62)
0.0763 (1.94)
All dimensions in inches ±0.01 (mm ±0.25mm). All pins on a 0.1 (2.54) pitch and within ±0.01 (0.25) of true position.
Weight: 1.09g (SIP) 1.25g (DIP)
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KDC_NKE.K06 Page 6 of 7
NKE Series
Isolated Sub-Miniature 1W Single Output DC/DC Converters
PACKAGE SPECIFICATIONS (continued)
RECOMMENDED FOOTPRINT DETAILS
8 Pin DIP Package
4 Pin SIP Package
)0-&4

)0-&4
 TUBE OUTLINE DIMENSIONS
4 Pin SIP Tube
8 Pin DIP Tube
œœ
œœ
Unless otherwise stated all dimensions in inches (mm) ±0.5mm.
Tube length (8 Pin DIP) : 20.47 (520mm ±2mm).
Tube length (4 Pin SIP) : 20.67 (525mm ±2mm).
Tube Quantity : 40
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260°C for 10 seconds. The pin termination finish
on the SIP package type is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both
types in this series are backward compatible with Sn/Pb soldering systems.
For further information, please visit www.murata-ps.com/rohs
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
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.
© 2014 Murata Power Solutions, Inc.
www.murata-ps.com/support
KDC_NKE.K06 Page 7 of 7