NKE SERIES Isolated Sub-Miniature 1W Single Output DC/DC Converters SELECTION GUIDE Nominal Input Output Output Isolation 1 Input Current at Efficiency MTTF Package Order Code Voltage Current Capacitance Voltage Rated Load Style (V) (V) (mA) (mA) % pF kHrs NKE0303DC 3.3 3.3 303 400 75 30 1234 NKE0305DC 3.3 5 200 400 76 35 632 DIP NKE0309DC 3.3 9 111 403 75 30 1204 NKE0303SC 3.3 3.3 303 400 75 30 1234 NKE0305SC 3.3 5 200 400 76 35 632 SIP NKE0309SC 3.3 9 111 403 75 30 1204 NKE0503DC 5 3.3 303 270 75 40 619 FEATURES NKE0505DC 5 5 200 289 69 28 2414 n RoHS Compliant NKE0505DEC 5 5 200 250 78 34 419 DIP NKE0509DC 5 9 111 266 75 29 1173 n Sub-Miniature SIP & DIP Styles NKE0512DC 5 12 83 260 77 30 633 n 3kVDC Isolation NKE0515DC 5 15 66 256 78 32 360 NKE0503SC 5 3.3 303 270 75 40 619 n Efficiency up to 81% NKE0505SC 5 5 200 289 69 28 2414 n Wide Temperature performance at full NKE0505SEC 5 5 200 250 78 34 419 SIP 1 Watt load, –40°C to 85°C NKE0509SC 5 9 111 266 75 29 1173 3 NKE0512SC 5 12 83 260 77 30 633 n Increased Power Density to 2.09W/cm NKE0515SC 5 15 66 256 78 32 360 n UL 94V-0 Package Material NKE1205DC 12 5 200 117 71 35 620 2 NKE1209DC 12 9 111 107 78 50 488 n Footprint at 0.69cm DIP NKE1212DC 12 12 83 105 79 57 360 n Industry Standard Pinout NKE1215DC 12 15 66 103 81 60 252 n 3.3V, 5V & 12V Input NKE1205SC 12 5 200 117 71 35 620 NKE1209SC 12 9 111 107 78 50 488 n 3.3V, 5V, 9V, 12V and 15V Output SIP NKE1212SC 12 12 83 105 79 57 360 n No Heatsink Required NKE1215SC 12 15 66 103 81 60 252 When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external n Internal SMD Construction 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. n Fully Encapsulated with Toroidal NKE0505SEC/NKE0505DEC offers higher efficiency than NKE0505SC/NKE0505DC but over a narrower operating temperature range. Magnetics See temperature characteristics graph. n MTTF up to 2.4 Million hours INPUT CHARACTERISTICS n Custom Solutions Available Parameter Conditions Min. Typ. Max. Units Continuous operation, 3.3V input types 2.97 3.3 3.63 n No Electrolytic or Tantalum Capacitors Voltage range Continuous operation, 5V input types 4.5 5.0 5.5 V Continuous operation, 12V input types 10.8 12.0 13.2 DESCRIPTION Reflected ripple current 3.3V input types 40 60 mA p-p The NKE sub-miniature series of DC/DC Converters is particularly suited to isolating ABSOLUTE MAXIMUM RATINGS and/or converting DC power rails. A smaller 2 Short-circuit protection 1 second package size, improved efficiency, lower Lead temperature 1.5mm from case for 10 seconds 300°C output ripple and 3kVDC isolation capability Internal power dissipation 530mW through state of the art packaging and Input voltage VIN, NKE03 types 5.5V improved technology. The galvanic isolation Input voltage VIN, NKE05 types 7V allows the device to be configured to provide Input voltage VIN, NKE12 types 15V an isolated negative rail in systems where only positive rails exist. The wide temperature 1. Calculated using MIL-HDBK-217F with nominal input voltage at full load. range guarantees startup from –40°C and full 2. Supply voltage must be disconnected at the end of the short circuit duration. 1 watt output at 85°C. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. KDC_NKEC.9 Page 1 of 4 www.cd4power.com NKE SERIES Isolated Sub-Miniature 1W Single Output DC/DC Converters OUTPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units 1 Rated Power TA=-40°C to 120°C 1.0 W Voltage Set Point Accuracy See tolerance envelope Line regulation High VIN to low VIN 1.0 1.2 %/% 10% load to rated load, 3.3V output types & 0309 10 15 10% load to rated load, 5V output types 12 15 2 Load Regulation 10% load to rated load, 9V output types 7.5 10 % 10% load to rated load, 12V output types 6.5 9.5 10% load to rated load, 15V output types 6.0 8.5 BW=DC to 20MHz, 3.3V output types & 0305, 0505SEC, 0505DEC 40 80 BW=DC to 20MHz, other 5V output types 77 100 Ripple and Noise BW=DC to 20MHz, 9V output types 43 90 mV p-p BW=DC to 20MHz, 12V output types 35 65 BW=DC to 20MHz, 15V output types 32 55 ISOLATION CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Isolation test voltage Flash tested for 1 second 3000 VDC Resistance Viso= 1000VDC 10 GΩ GENERAL CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Switching frequency All output types 115 kHz TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Specification All output types -40 85 Storage -50 130 °C 0505D/S, 1205D/S 41 Case temperature rise above ambient 32 All other output types Cooling Free air convection 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. C&D Technologies NKE 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 NKE 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 NKE 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. KDC_NKEC.9 Page 2 of 4 www.cd4power.com Typical Load Line Typical Load Line NKE SERIES Isolated Sub-Miniature 1W Single Output DC/DC Converters TEMPERATURE DERATING GRAPHS NKE 0303DC/SC, 0305DC/SC, 1.5 All other types. 1.5 0309DC/SC, 0503DC/SC, 0505DEC/SEC types only. 85°C 85°C 1.0 1.0 0.5 Safe Operating Area 0.5 Safe Operating Area 120°C 0 0 -40 0 50 100 150 -40 100 150 0 50 Ambient Temperature (°C) Ambient Temperature (°C) TOLERANCE ENVELOPES All other types. 3.3V output types. +10% +9% +5% +2.5% +1% +1% V V NOM NOM -2.5% -7% -7% -7.5% -15% 100 100 10 25 50 75 10 25 50 75 Output Load Current (%) Output Load Current (%) PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS - 8 PIN DIP DIP Package SIP Package 
Pin Function  /,&%$ 1 -VIN 9::88 4 +VIN 
  5 +VOUT  7 -VOUT 

PIN CONNECTIONS - 4 PIN SIP 
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 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) KDC_NKEC.9 Page 3 of 4 www.cd4power.com Output Voltage Output Power (W) Output Voltage Output Power (W) 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 
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   TUBE OUTLINE DIMENSIONS 4 Pin SIP Tube 8 Pin DIP Tube 




 
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Unless otherwise stated all dimensions in inches (mm) ±0.5mm. Tube length (8 Pin DIP) : 20.47 (520mm ±2mm). Tube Quantity : 40 Tube length (4 Pin SIP) : 20.67 (525mm ±2mm). RoHS COMPLIANCE INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300°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.cd4power.com/rohs C&D Technologies (NCL) Limited reserve the right to alter or improve the specification, internal design or manufacturing C&D Technologies (NCL) Ltd C&D Technologies, Inc. process at any time, without notice. Please check with your supplier or visit our website to ensure that you have the current Tanners Drive, Blakelands North 11 Cabot Boulevard, Mansfield, and complete specification for your product before use. Milton Keynes MK14 5BU, UK MA 02048-1151, USA © C&D Technologies (NCL) Limited 2006 KDC_NKEC.9 Tel: +44 (0)1908 615232 Tel: +1 (508) 339-3000 No part of this publication may be copied, transmitted or stored in a retrieval system or reproduced in any way including, Fax: +44 (0)1908 617545 Fax: +1 (800) 233-2765 but not limited to, photography, photocopy, magnetic or other recording means, without prior written permission from C&D email: MK@cdtechno.com email: sales@cdtechno.com Technologies (NCL) Limited. Instructions for use are available from www.cd4power.com KDC_NKEC.9 Page 4 of 4 www.cd4power.com 
 


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