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NKA Series
Isolated Sub-Miniature 1W Dual Output DC/DC Converters
SELECTION GUIDE
Order Code
NKA0303DC NKA0305DC NKA0309DC NKA0312DC NKA0315DC NKA0303SC NKA0305SC NKA0309SC NKA0312SC NKA0315SC NKA0503DC NKA0505DC NKA0505DEC NKA0509DC NKA0512DC NKA0515DC NKA0503SC NKA0505SC NKA0505SEC NKA0509SC NKA0512SC NKA0515SC NKA1205DC NKA1209DC NKA1212DC NKA1215DC NKA1205SC NKA1209SC NKA1212SC NKA1215SC
Nominal Input Voltage V
3.3 3.3 3.3 3.3 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
Output Voltage V
3.3 5 9 12 15 3.3 5 9 12 15 3.3 5 5 9 12 15 3.3 5 5 9 12 15 5 9 12 15 5 9 12 15
Output Current mA
152 100 56 42 33 152 100 56 42 33 152 100 100 56 42 33 152 100 100 56 42 33 100 56 42 33 100 56 42 33
Input Current at Rated Load mA
407 383 402 390 384 407 383 402 390 384 259 285 249 263 255 253 259 285 249 263 255 253 112 106 104 102 112 106 104 102
Efficiency %
74 79 75 78 79 74 79 75 78 79 77 70 80 76 78 79 77 70 80 76 78 79 74 79 81 82 74 79 81 82
Isolation MTTF1 Package Capacitance Style pF kHrs
20 22 30 31 32 20 22 30 31 32 22 21 26 25 28 29 22 21 26 25 28 29 33 48 55 60 33 48 55 60 195 1121 1035 375 206 195 1121 1035 375 206 205 1697 1557 682 343 188 205 1697 1557 682 343 188 559 375 243 154 559 375 243 154
DIP
SIP
FEATURES
RoHS compliant Efficiency up to 82% Wide temperature performance at full 1 Watt load, -40C to 85C UL 94V-0 package material Reduced footprint at 0.98cm2 Industry standard pinout Power sharing on output 3.3V, 5V & 12V Input 3.3V, 5V, 9V, 12V and 15V output Internal SMD construction Fully encapsulated with toroidal magnetics No external components required MTTF up to 1.6 Million hours No electrolytic or tantalum capacitors
DIP
SIP
DIP
SIP
DESCRIPTION
The NKA sub-miniature series of industrial temperature range DC/DC converters are the standard building blocks for on-board distributed power systems. The series offers smaller package size, improved efficiency, lower output ripple and 3kVDC isolation capability through the use of state of the art packaging and technology. Ideally suited for providing dual rail supplies on primarily digital boards with the added benefit of galvanic isolation to reduce switching noise. All of the rated power may be drawn from a single pin provided the total load does not exceed 1 watt.
When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external capacitance value for guaranteed start up. The slower the rise time of the input voltage the greater the maximum value of the additional external capacitance for reliable start up. NKA0505DEC/NKA0505SEC offer higher efficiency than NKA0505SC/NKA0505DC but over a narrower operating temperature range. See temperature characteristics graph.
INPUT CHARACTERISTICS
Parameter
Voltage range
Conditions
Continuous operation, 3.3V input types Continuous operation, 5V input types Continuous operation, 12V input types 3.3V input types All other types
Min.
2.97 4.5 10.8
Typ.
3.3 5 12 30 20
Max.
3.63 5.5 13.2 60 35
Units
V
Reflected ripple current
mA p-p
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection2 Lead temperature 1.5mm from case for 10 seconds Internal power dissipation Input voltage VIN, NKA03 types Input voltage VIN, NKA05 types Input voltage VIN, NKA12 types 1 second 300C 550mW 5.5V 7V 15V
For full details go to www.murata-ps.com/rohs
1. Calculated using MIL-HDBK-217F with nominal input voltage at full load. 2. Supply voltage must be discontinued at the end of the short circuit duration. All specifications typical at TA=25C, nominal input voltage and rated output current unless otherwise specified.
www.murata-ps.com
Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NKAC.I02 Page 1 of 4
NKA Series
Isolated Sub-Miniature 1W Dual Output DC/DC Converters
OUTPUT CHARACTERISTICS
Parameter
Rated Power1 Voltage Set Point Accuracy Line regulation
Conditions
TA=-40C to 120C See tolerance envelope High VIN to low VIN 10% load to rated load, 0312 & 0315 10% load to rated load, 3.3V output types 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, 0312 & 0315 BW=DC to 20MHz, 3.3V output types BW=DC to 20MHz, 5V output types BW=DC to 20MHz, 9V output types BW=DC to 20MHz, 12V output types BW=DC to 20MHz, 15V output types
Min.
Typ.
Max.
1
Units
W %/%
Load Regulation2
Ripple and Noise
1.0 8 10 10 6.5 6 6 25 40 50 40 40 40
1.2 14 15 12 8 8.5 7 60 80 75 65 60 60
%
mV p-p
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage Resistance
Conditions
Flash tested for 1 second Viso= 1000VDC
Min.
3000
Typ.
10
Max.
Units
VDC G
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
0303, 0305, 0312, 0315, 0503 and 0505XE All other types
Min.
Typ.
95 120
Max.
Units
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Specification Storage Case temperature rise above ambient Cooling
Conditions
All output types 5V output types All other output types Free air convection
Min.
-40 -50
Typ.
Max.
85 130
Units
C
30 21
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 NKA 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 NKA 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 NKA series has toroidal isolation transformers, 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.
1. See Derating Graphs. 2. 12V input types have typically 3% less load regulation.
www.murata-ps.com
Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NKAC.I02 Page 2 of 4
NKA Series
Isolated Sub-Miniature 1W Dual Output DC/DC Converters
TEMPERATURE DERATING GRAPHS NKA0303DC/SC, 0305DC/SC 1.5 0309DC/SC, 0505DEC/SEC types only. 1.0 All other types. 85C 1.5
Output Power (W)
Output Power (W)
1.0 0.5 0 -40
85C
0.5 0 -40
Safe Operating Area
Safe Operating Area 120C 100 50 0 Ambient Temperature (C) 150
100 50 0 Ambient Temperature (C)
150
TOLERANCE ENVELOPES 3.3V output types. +9%
Typical L oad Lin
All other types. +10%
e
+1% VNOM
+1% -7% -15%
+5% VNOM
Typical L
oad Line
+2.5% -2.5% -7.5%
Output Voltage
-7%
Output Voltage
10
75 50 25 Output Load Current (%)
100
10
75 50 25 Output Load Current (%)
100
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
0.768 (19.50)
PIN CONNECTIONS - 14 PIN DIP
0.652 (16.55)
Pin
1 7
Function
-VIN NC OV +VOUT -VOUT +VIN
0.234 (5.95)
NKA0505DC
XYYWW
0.386 (9.80)
8 9 11 14
PIN CONNECTIONS - 6 PIN SIP Pin
0.213 (5.40)
Function
+VIN -VIN -VOUT OV +VOUT
0.297 (7.55)
NKA0515SC
XYYWW
4
0.024 (0.60) 0.020 (0.50)
1 2 4 5
0.10 (2.54)
0.181 (4.60) 0.142 (3.60) 0.01960.00196 (0.500.05)
0.181 (4.60) 0.142 (3.60)
1
2
5
6
6
0.600 (15.24)
1
0.043 (1.09)
7
0.300 (7.62)
0.0660.02 0.01960.00196 (0.500.05) (1.6750.50)
14
0.012 (0.30) 0.008 (0.20) 0.084 (2.13)
11
9
8
0.012(0.30) 0.008(0.20)
0.10 (2.54)
0.049 (1.25)
0.50(12.70)
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: 1.4g (SIP) 1.9g (DIP)
www.murata-ps.com
Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NKAC.I02 Page 3 of 4
NKA Series
Isolated Sub-Miniature 1W Dual Output DC/DC Converters
PACKAGE SPECIFICATIONS (continued)
RECOMMENDED FOOTPRINT DETAILS
14 Pin DIP Package
0.0453 (1.00) O 0.0394 (1.15) 6 HOLES O0.1
6 Pin SIP Package
O 0.0453 (1.00) 0.0394 (1.15) 5 HOLES O0.1
0.1 (2.54) 0.1 (2.54)
0.1 (2.54)
0.1 (2.54)
TUBE OUTLINE DIMENSIONS 14 Pin DIP Tube 6 Pin SIP Tube
Unless otherwise stated all dimensions in inches (mm) 0.5mm. Tube length (14 Pin DIP) : 20.47 (520mm 2mm). Tube length (6 Pin SIP) : 20.67 (525mm 2mm).
DIP Tube Quantity : 25 SIP Tube Quantity : 30
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300C 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
USA: UK: France: Japan:
Tucson (Az), Tel: (800) 547 2537, email: sales@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Website: www.murata-ps.jp Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
Canada: Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 REGISTERED
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. (c) 2008 Murata Power Solutions, Inc.
Germany: Munchen, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com
China:
www.murata-ps.com
Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NKAC.I02 Page 4 of 4

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