NKE-XSC&NKE-XDC Series Isolated Sub-Miniature 1W Single Output DC/DC Converters SELECTION GUIDE Input Nominal Current (mA) Rated Load NKE0303XDC 3.3 NKE0305XDC 3.3 NKE0309XDC Order code FEATURES RoHS Compliant ◆ Sub-Miniature SIP4&DIP8 Styles ◆ 3kVDC Isolation ◆ ◆Wide Temperature performance at full 1 Watt load,-40℃ to 85℃ Increased Power Density to 2.09W/cm3 ◆ UL 94V-0 Package Material ◆ Footprint at 0.69cm2 ◆ Industry Standard Pin out ◆ 3.3V,5V & 12V Input ◆ 3.3V,5V,9V,12Vand15V Output Voltage(VDC) Internal SMD Construction Fully Encapsulated with Toroidal Magnetics ◆ MTTF up to 2.6 Million hours ◆ Custom Solutions Available ◆ No Electrolytic or Tantalum Capacitors ◆ MODEL SELECTION NKE①05②05③XS(D)C④ ①Product Series ②Input Voltage ③Output Voltage ④Fixed Input&SIP4(DIP8)Package MTTF1 (%.Typ.) pF KHrs 400 3.3 303 72 30 1234 400 5 200 75 35 632 3.3 403 9 111 74 30 1204 NKE0312XDC 3.3 398 12 83 76 33 --- NKE0315XDC 3.3 394 15 66 77 35 --- NKE0303XSC 3.3 400 3.3 303 72 30 1234 NKE0305XSC 3.3 400 5 200 75 35 632 NKE0309XSC 3.3 403 9 111 74 30 1204 NKE0503XDC 5 270 3.3 303 74 40 619 NKE0505XDC 5 289 5 200 69 28 2414 NKE0505XDEC 5 250 5 200 77 34 419 NKE0509XDC 5 266 9 111 75 29 1173 NKE0512XDC 5 260 12 83 78 30 633 NKE0515XDC 5 256 15 66 78 32 360 NKE0503XSC 5 270 3.3 200 74 40 619 NKE0505XSC 5 289 5 303 69 28 2414 NKE0505XSEC 5 250 5 200 77 34 419 NKE0509XSC 5 266 9 111 75 29 1173 NKE0512XSC 5 260 12 83 78 30 633 NKE0515XSC 5 256 15 66 78 32 360 NKE1205XDC 12 117 5 200 72 35 620 NKE1209XDC 12 107 9 111 78 50 488 NKE1212XDC 12 105 12 83 79 57 360 NKE1215XDC 12 103 15 66 81 60 252 NKE1205XSC 12 117 5 200 72 35 620 NKE1209XSC 12 107 9 111 78 50 488 NKE1212XSC 12 105 12 83 79 57 360 NKE1215XSC 12 103 15 66 81 60 252 NKE0505SEC/NKE0505DEC offers higher effciency than NKE0505SC/NKE0505DC but over a narrower operating temperature range. See temperature characteristics graph. Input Characteristics Voltage range The NKE sub-miniature series of DC/CD 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℃ and full 1 watt output at 85℃. Isolation Capacitance Current (mA) Parameter APPLICATIONS Voltage Efficiency (VDC) ◆ ◆ Output Conditions Min. Typ. Max. Continuous operation, 3.3V 2.97 3.3 3.63 Continuous operation, 5V Continuous operation, 12V Reflected ripple current 4.5 5.0 5.5 10.8 12.0 13.2 40 60 3.3V input types Units V mA p-p Absolute Maximum Ratings Lead temperature 1.5mm from case for 10 seconds 300℃ Internal power dissipation 530mW Input voltage V , NKE03 types 5.5V Input voltage V, NKE05 types 7V Input voltage V, NKE12 types 15V MICRODC RESERVES THE COPYRIGHT http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 1 of 5 NKE-XSC&NKE-XDC Series Output Specifications Parameter Conditions Rated Power TA=-40°C to 120°C,see derating graphs Voltage Set Point Accuracy See tolerance envelope Line regulation High Vin to low Vin Min. 10% load to rated load, 3.3V output types & 0309 Load regulation1 Ripple＆Noise Typ. Max. Units 1.0 W 1.0 1.2 %% 10 1.2 10% load to rated load, 5V output types 12.8 15 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, 0505XSEC,0505XDEC 40 80 BW=DC to 20MHz, other 5V output types 62 85 BW=DC to 20MHz, 9V output types 103 170 BW=DC to 20MHz, 12V output types 49 75 BW=DC to 20MHz, 15V output types 39 65 Typ. Max. % mV p-p Isolation Characteristics Parameter Conditions Min. Isolation test voltage Flash tested for 1 second 3000 resistance Viso= 1000VDC Units VDC 10 GΩ General Characteristics Parameter Conditions Switching frequency All output types Min. Typ. Max. 115 Units kHz Temperature Characteristics Parameter Conditions Min. Specification All output types -40 85 -50 130 Storage Typ. Max. Case temperature rise above 0505,1205 41 ambient All other output types 32 Cooling Free air convevtion Units ℃ 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 speciffied time, across a component designed to provide electrical isolation, to verify the integrity of that isolation. MICRODC Power Module NKE series of dc/dc converters are all 100% production tested at their stated isolation voltage. This is 1000V 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.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 materi-als, 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 speciffied 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. Temperature derating graph NKE0303XDC/XSC,0305XDC/XSC,030 9XDC/XSC,0503XDC/XSC,0505XDEC/ All other types. XSEC types only. UL recognition to a maximum ambient temperature of 85ºC and/or case temperature limit of 130ºC. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 2 of 5 NKE-XSC&NKE-XDC Series Tolerance envelopes All other types 3.3V output types 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. Application Notes Minimum load The minimum load to meet data sheet speciffication is 10% of the full rated load across the speciffied input voltage range. Lower than 10% minimum loading will result in an increase in output voltage, which may rise to typically double the speciffied 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 Start-up time Start-up time μs μs NKE0303XSC 544 NKE0512XSC 5040 NKE0305XSC 1306 NKE0515XSC 9940 NKE0309XSC 5250 NKE1205XSC 1671 NKE0503XSC 496 NKE1209XSC 2835 NKE0505XSC 1075 NKE1212XSC 5295 NKE0505XSEC 894 NKE1215XSC 8475 NKE0509XSC 3140 Ripple & Noise Characterization 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 C2 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. C3 100nF multilayer ceramic capacitor, general purpose R1 450Ω resistor, carbon fi lm, ±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 speciffied values. Differential Mode Noise Test Schematic http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 3 of 5 NKE-XSC&NKE-XDC Series Application Notes 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. Inductor Capacitor L,μH SMD Through Hole C,μF NKE0303XS(D)C 10 82103C 11R103C 4.7 NKE0305XS(D)C 47 82473C 11R473C 4.7 NKE0309XS(D)C 47 82473C 11R473C 1 NKE0503XS(D)C 10 82103C 11R103C 4.7 NKE0505XS(D)C 47 82473C 11R473C 4.7 NKE0505X(S)DEC 47 82473C 11R473C 4.7 NKE0509XSC 47 82473C 11R473C 1 NKE0512XS(D)C 68 82683C 11R683C 0.68 NKE0515XS(D)C 100 82104C 11R104C 2.2 NKE1205XS(D)C 47 82473C 11R473C 4.7 NKE1209XS(D)C 47 82473C 11R473C 1 NKE1212XS(D)C 68 82683C 11R683C 0.47 NKE1215XS(D)C 100 82104C 11R104C 2.2 Package Specifications Mechanical Dimensions DIP8 Package PIN CONNECTIONS-8 PIN DIP SIP4 Package Pin Function 1 -VIN 4 +VIN 5 +VOUT 7 -VOUT PIN CONNECTIONS-4 PIN SIP 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. http://www.microdc.cn Pin Function 1 -VIN 2 +VIN 3 -VOUT 4 +VOUT Weight: 1.09g (SIP4) 1.25g (DIP8) Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 4 of 5 NKE-XSC&NKE-XDC Series Package Specifications(continued) Recommended Footprint Details 8 Pin DIP Package 4 Pin SIP Package Tube Outline Dimensions 8 Pin DIP Tube 4 Pin SIP Tube 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). PRODUCT ID DESCRIPTION http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 5 of 5