NDL Series www.murata-ps.com Isolated 2W Wide Input Single Output DC/DC Converters FEATURES RoHS compliant 2:1 wide range voltage input Continuous short circuit protection with current foldback Operating temperature range -40ºC to 85ºC 0.75% regulation 1kVDC Isolation Efficiency to 83% NDL0505SC NDL0509SC NDL0512SC NDL0515SC NDL1205SC NDL1209SC NDL1212SC NDL1215SC NDL2405SC NDL2409SC NDL2412SC NDL2415SC NDL4805SC NDL4809SC NDL4812SC NDL4815SC Rated Output Voltage Isolation Capacitance Order Code Input Voltage Efficiency SELECTION GUIDE V (nom.) V mA mA mA % pF kHrs 5 5 5 5 12 12 12 12 24 24 24 24 48 48 48 48 5 9 12 15 5 9 12 15 5 9 12 15 5 9 12 15 100 55 42 33 100 55 42 33 100 55 42 33 100 55 42 33 400 222 167 134 400 222 167 134 400 222 167 134 400 222 167 134 606 558 559 549 228 211 208 206 112 102 100 100 57 52 51 51 66 71 71 73 73 79 80 81 74 81 83 83 73 80 81 82 26 27 26 27 39 38 47 47 37 40 51 58 39 40 53 65 2015 1998 1980 1965 1994 1981 1961 1947 1722 1711 1696 1685 1719 1709 1694 1683 Units Power density 0.9W/cm3 INPUT CHARACTERISTICS 5V, 12V, 24V & 48V nominal input Parameter 5V, 9V, 12V & 15V output No electrolytic capacitors Voltage range Fully encapsulated External control Reflected ripple current Low noise Output Current 1 Min Load 3 Full Load Input Current 2 Full Load Conditions Min. Typ. Max. All NDL05 types All NDL12 types All NDL24 types All NDL48 types All NDL05 types with 100μF at input All NDL12 types with 100μF at input All NDL24 types with 10μF at input All NDL48 types with 10μF at input 4.5 9 18 36 5 12 24 48 9 18 36 72 250 150 380 170 300 140 MTTF 4 VDC mA p-p Fully encapsulated ABSOLUTE MAXIMUM RATINGS DESCRIPTION The NDL series is a range of high performance miniature DC/DC converters having regulated outputs over the wide temperature range of -40ºC to 85ºC. The input voltage range is 2:1 with the output power at 2 watts and the input to output isolation is 1kVDC. Continuous short circuit protection, external control and extremely small SIP packaging provide state of the art functionality. Nominal input voltages of 5, 12, 24 and 48V with output voltages of 5,9,12 and 15V are available as standard with custom parts on request. The plastic case is rated to UL94V-0 with encapsulant to UL94V-1. Short-circuit protection Lead temperature 1.5mm from case for 10 seconds Control pin input current Input voltage 05 types Input voltage 12 types Input voltage 24 types Input voltage 48 types Continuous 300°C 15mA 10V 20V 40V 80V 1. Refer to power derating graph for operating of 5V input types at 4.5 to 6V. 2. Measured at full load with external input/output capacitors. 3. Please refer to minimum load application notes section on page 3. 4. 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 www.murata-ps.com/support KDC_NDL.F05 Page 1 of 4 NDL Series Isolated 2W Wide Input Single Output DC/DC Converters OUTPUT CHARACTERISTICS Conditions 1 Typ. Max. All NDL05/12 input types with external input/output capacitors All NDL24/48 input types with external input/output capacitors All NDL05/12 input types, low line to high line with external input/output capacitors All NDL24/48 input types, low line to high line with external input/output capacitors All NDL05/12 input types, minimum load to rated load with external input/output capacitors All NDL24/48 input types, minimum load to rated load with external input/output capacitors B/W = 20MHz to 300kHz with external input/output capacitors All NDL05 input types, B/W =DC to 20MHz with external input/output capacitors All NDL12 input types, B/W =DC to 20MHz with external input/output capacitors All NDL24/48 input types, B/W =DC to 20MHz with external input/output capacitors +VIN nominal ±1 ±2 0.05 0.04 0.2 0.2 5 50 110 50 2.8 ±3 ±5 0.5 0.4 0.75 0.75 10 100 170 100 ISOLATION CHARACTERISTICS Parameter Conditions Min. Typ. Max. Isolation test voltage Resistance Flash tested for 1 second VISO = 1000VDC 1000 1 GENERAL CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Control pin (CTRL) input current Switching frequency Please refer to control pin application note Max. rated load to Min. rated load, VIN Min. to VIN. Max. 6 100 10 15 600 mA kHz Conditions Min. -40 -50 Typ. Max. 85 130 Units Parameter Voltage set point accuracy Line regulation Load regulation Ripple Noise Shutdown power Units % % % mV rms mV p-p mW Units VDC GΩ TEMPERATURE CHARACTERISTICS Parameter Operation Storage Cooling ºC 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. Murata Power Solutions NDL 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 NDL 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 NDL series has an EI 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. 1. Refer to recommended test circuit for external input/output capacitors. www.murata-ps.com/support KDC_NDL.F05 Page 2 of 4 NDL Series Isolated 2W Wide Input Single Output DC/DC Converters APPLICATION NOTES External capacitance Although these converters will work without external capacitors, they are necessary in order to guarantee the full parametric performance over the full line and load range. All parts have been tested and characterized using the following values and test circuit. Value Input Voltage (V) 5 & 12 24 & 48 CIN 100μF, 25V 10μF, 200V COUT 100μF, 25V 100μF, 25V Test circuit + VOUT + VIN Supply + VIN CIN Supply - VIN NDL COUT - VIN - VOUT Control Pin The NDL converters have a shutdown feature which enables the user to put the converter into a low power state. The control pin connects directly to the base of an internal transistor, and the switch off mechanism for the NDL works by forward biasing this NPN transistor. If the pin is left open (high impedance), the converter will be ON (there is no allowed low state for this pin), but once a control voltage is applied with sufficient drive current, the converter will be switched OFF. A suitable application circuit is shown below. D1 (e.g. 1N4001) is required to provide high impedence when the signal is low. From the NDL specification, the drive current to operate this function NDL VIN is recommended to be 10mA, and hence the value of R1 can be derived as follows: R2 V -V -V R1 VC D1 R1 = C D Q CTRL IC Q OV 1 -VIN Assuming VC=5V, VD=0.7V and VQ=1V: R1= 5 - 0.7 - 1.0 = 330Ω 10 x 10-3 Pin 8 (CS) This pin provides a connection point to the main reservoir capacitor. Additional capacitance can be added from this pin to pin 7. Any lower ESR capacitor will remove ripple and noise to some degree. The benefit of this access point over simple additional output capacitance is that it precedes the output filter inductor. Maximum values of external capacitance will be dependent on the output voltage, the loading of the converter and the desired ripple figure. Values can be up to 100μF. Minimum load The minimum load for correct operation is 25% of the full rated load across the specified input voltage range. Lower loads may cause a significant increase in output ripple and may cause the output voltage to exceed its specification transiently during power-down when the input voltage also falls below its rated minimum. This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300ºC for 10 seconds. The pin termination finish on this product series is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems. NDL05 POWER DERATING CURVE 2.5 Output Power (W) RoHS COMPLIANT INFORMATION 2.0 1.75 1.5 1.0 0.5 0 4.5 5 For further information, please visit www.murata-ps.com/rohs 6 7 Isolation voltage (V) 8 9 www.murata-ps.com/support KDC_NDL.F05 Page 3 of 4 NDL Series Isolated 2W Wide Input Single Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS 0.858 (21.80) 0.362 (9.20) 0.437 (11.10) NDL4805SC 0.022 (0.55) 0.0178 (0.45) XYYWW 1 2 3 5 6 7 Function 1 2 3 5* 6 7 8 -VIN +VIN CTRL IC +VOUT -VOUT CS * This pin is internally connected, and must have no external connection and is used for mechanical reasons. External connection to anything will result in converter failure. 8 0.181 (4.60) 0.142 (3.60) RECOMMENDED FOOTPRINT DETAILS 0.022 (0.55) 0.0178 (0.45) 0.1 (2.54) Pin 0.0118 (0.30) 0.0079 (0.20) 0.126 (3.20) )0-&4 0.079±0.02 (2.01±0.50) Weight: 5.0g 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. All dimensions in inches ±0.01 (mm ±0.5mm). TUBE OUTLINE DIMENSIONS All dimensions in inches ±0.01 (mm ±0.5mm). Tube length : 20.47±0.079 (520mm ±2mm). Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED Tube Quantity : 23 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. © 2012 Murata Power Solutions, Inc. www.murata-ps.com/support KDC_NDL.F05 Page 4 of 4