NDTD Series www.murata-ps.com Isolated 3W Wide Input Dual Output DC-DC Converters Dual isolated output Short circuit protection Operating temperature range -40C to 85C Load and line regulation <1% on both outputs No heatsink required 1kVDC isolation `Hi Pot Test' 5V, 12V, 24V & 48V Input 5V, 12V & 15V Output Internal SMD construction NDTD0503C NDTD1203C NDTD2403C NDTD4803C Isolation capacitance 2:1 Input range, 3W output power, minimum 3:1 input range with power derating to 2W Efficiency 2 (Min.) Industry standard footprint Min. Load 1 Input current full load FEATURES NDTD0505C NDTD0512C NDTD0515C NDTD1205C NDTD1212C NDTD1215C NDTD2405C NDTD2412C NDTD2415C NDTD4805C NDTD4812C NDTD4815C Rated output voltage Order code Input voltage SELECTION GUIDE MTTF 3 V (Nom.) V mA mA mA % pF kHrs 5 5 5 12 12 12 24 24 24 48 48 48 5 12 15 5 12 15 5 12 15 5 12 15 75 31 25 75 31 25 75 31 25 75 31 25 300 125 100 300 125 100 300 125 100 300 125 100 804 764 773 321 311 310 156 148 146 79 76 75 72 76 75 75 78 78 78 82 82 76 80 81 31 36 34 29 32 36 30 35 41 30 35 36 1640 1625 1609 1665 1650 1633 1675 2075 2080 1669 2090 2045 5 12 24 48 113 113 113 113 Full load 454 454 454 454 890 343 170 86 67 73 73 72 30 30 30 30 1644 1668 1671 1667 Recommended Alternative Contact Murata Contact Murata Contact Murata Contact Murata INPUT CHARACTERISTICS Parameter Fully encapsulated Voltage range DESCRIPTION The NDTD series is a range of low profile DC-DC converters offering dual outputs over a 2:1 input voltage range. All parts deliver 3W output power up to 85C without heatsinking. A flyback oscillator design with isolated feedback is used to give regulation over the full operating range of 25% to 100% of full load. It is strongly recommended that external capacitors be used on input and output to guarantee performance over full load and input voltage range (see application notes for guidance). The plastic case is rated to UL94V-0 and encapsulant to UL94V-1 and the connection pins are formed from a tin plated alloy 42 leadframe. 3.3 3.3 3.3 3.3 Output current Reflected ripple current 4 Conditions Min. Typ. Max. 5V input types 12V input types 24V input types 48V input types 5V input types 12V, 24V & 48V input types 4.5 9 18 36 5 12 24 48 40 30 9 18 36 75 90 40 Units VDC mA p-p ABSOLUTE MAXIMUM RATINGS Short-circuit protection Lead temperature 1.5mm from case for 10 seconds Minimum output load for specification1 Input voltage 5V types Input voltage 12V types Input voltage 24V types Input voltage 48V types Free air space 8 hours 300C 25% of rated output 10V 20V 40V 80V 10mm Min. around component 1. Please refer to minimum load application note section on page 4. 2. Measured at full load with external input/output capacitors, refer to test circuit. 3. Calculated using MIL-HDBK-217F with nominal input voltage at full load (ground benign) at 25C. 4. Please refer to reflected ripple current measurement circuit on page 3. All specifications typical at TA=25C, 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_NDTD.G01 Page 1 of 7 NDTD Series Isolated 3W Wide Input Dual Output DC-DC Converters OUTPUT CHARACTERISTICS Parameter Conditions Min. 5V outputs 12V & 15V outputs Typ. Max. Units 2 1 5 3 % Voltage set point accuracy With external input/output capacitors Line regulation Low line to high line with external input/output capacitors 0.15 0.5 % 5V outputs 12V & 15V outputs BW = 20Hz to 300kHz with external input/output capacitors BW = DC to 20MHz with external input/output capacitors 0.5 0.2 15 90 1.0 0.5 40 150 % % mV rms mV p-p Load regulation Ripple Ripple & noise Cross regulation 25% load to 100% load with external input/output capacitors with balanced load % voltage change on negative output when positive load varies from 12% to 50% of 3W rating, with negative load fixed at 50% NDTD05XXC, NDTD1205C, NDTD2405C, NDTD4805C 5.0 % NDTD1212C, NDTD1215C, NDTD2412C, NDTD2415C, NDTD4812C, NDTD4815C 2.1 Short circuit protection Continuous GENERAL CHARACTERISTICS Parameter Conditions Switching frequency 100% to 25% load, VIN min to max Min. Typ. 60 TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Operation Storage -40 -50 Case temperature rise above ambient in still air 3.0 Typ. Max. Units 620 kHz Max. Units 85 130 NDTD0505C, NDTD0512C, NDTD1205C, NDTD2405C, NDTD4805C 35 NDTD0515C, NDTD1212C, NDTD1215C, NDTD2412C, NDTD4812C, NDTD2415C, NDTD4815C 28 C ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation voltage Resistance Flash tested for 1 second Viso=1KVDC 1000 1 Typ. Max. Units VDC G 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 NDTD 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 NDTD 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 NDTD 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. www.murata-ps.com/support KDC_NDTD.G01 Page 2 of 7 NDTD Series Isolated 3W Wide Input Dual Output DC-DC Converters TERMINOLOGY LINE REGULATION The percentage change in output voltage between low intput voltage and high intput voltage, measured with fixed output load i.e. a 5V part with an output voltage of 5.05V @ high input voltage and 5.03V @ low input voltage would have a line regulation of 0.4%. VOUT (Low Input V) - VOUT (High Input V) Line regulation = VOUT (Nominal Input V) x100% Where VOUT (Nominal Input V) is 5V. APPLICATION NOTES Recommended Input & Output Capacitors 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. Input Voltage 5V, 12V 24V, 48V Output Voltage 5V 12V, 15V CIN 100F, 25V (0.25 at 100kHz) 10F, 100V (1.5 at 100kHz) COUT 100F, 25V (0.25 at 100kHz) 47F, 25V (0.4 at 100kHz) Test circuit + VOUT COUT + VIN Supply + VIN CIN NDTD Supply - VIN OV COUT - VIN - VOUT Reflected Ripple Current Measurement 12H Current Probe Supply +VIN +VIN C1 Supply -VIN +VOUT NDTD CIN -VIN COUT Load COUT Load OV -VOUT C1 = 220F, ESR < 0.1 at 100kHz Cross Regulation Load regulation is at its best when the positive and negative loads are balanced. When the loads are asymmetric, the negative output is not as tightly regulated as the positive output. To meet ripple specification a total minimum load of 25% full load is required, however, the NDTD can be used with much lighter loading at the expense of increased ripple. A small load is required on the negative output of 150mW to ensure the maximum negative output voltage is not exceeded. www.murata-ps.com/support KDC_NDTD.G01 Page 3 of 7 NDTD Series Isolated 3W Wide Input Dual Output DC-DC Converters APPLICATION NOTES (continued) 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. The following graphs show the typical required minimum load required for stable operation in mA verses input voltage. Some variants are not included as they do not typically require a minimum load for stable operation: NDTD0512C, NDTD0515C, NDTD1212C, and NDTD1215C. NDTD0505C 45 40 35 Minimum Load (mA) 30 25 20 0505 15 10 5 0 6 7 8 9 Input Voltage (V) NDTD1205C 50 45 40 Minimum Load (mA) 35 30 25 1205 20 15 10 5 0 6 8 10 12 Input Voltage (V) 14 16 18 www.murata-ps.com/support KDC_NDTD.G01 Page 4 of 7 NDTD Series Isolated 3W Wide Input Dual Output DC-DC Converters APPLICATION NOTES (continued) NDTD24XXC 70 60 Minimum Load (mA) 50 40 30 2405 20 2415 10 2412 0 11 12 16 20 24 28 32 36 Input Voltage (V) NDTD48XXC 45 40 35 Minimum Load (mA) 30 25 4805 20 15 4812 10 4815 5 0 32 40 48 56 64 72 Input Voltage (V) www.murata-ps.com/support KDC_NDTD.G01 Page 5 of 7 NDTD Series Isolated 3W Wide Input Dual Output DC-DC Converters APPLICATION NOTES (continued) NDTD Power Derating The NDTD series will operate from a wider input range than specified in the input characteristics datasheet table with output power derating. NDTD12XXC 5 5 4 4 Output Power (W) Output Power (W) NDTD05XXC 3 2 1 0 3 Input voltage (V) 1 9 Input voltage (V) 18 NDTD48XXC 5 5 4 4 Output Power (W) Output Power (W) NDTD24XXC 2 0 5 9 4.5 3 3 2 1 0 11 18 Input voltage (V) 36 3 2 1 0 20 36 Input voltage (V) 75 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 this product series is Tin. The series is backward compatible with Sn/Pb soldering systems. For further information, please visit www.murata-ps.com/rohs www.murata-ps.com/support KDC_NDTD.G01 Page 6 of 7 NDTD Series Isolated 3W Wide Input Dual Output DC-DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS 32.26 (1.270) NDTDXXXXC 7*/ 7*/ 07 07 14.66 (0.577) XYYWW 2.54 (0.100) 7*/ 7*/ 5.08 (0.200) 7065 7065 Pin Function 2 3 9 11 14 16 22 23 -VIN -VIN OV -VOUT +VOUT OV +VIN +VIN 7.00 (0.27) 5.00 (0.197) 4.00 (0.157) RECOMMENDED FOOTPRINT DETAILS 0.73 (0.029) 0.63 (0.025) 4.70 (0.185) x8 HOLES (0.057) O 1.45 1.30 (0.051) 22.86 (0.900) 2.54 (0.1) 0.30 (0.012) 0.20 (0.008) 15.25 (0.600) MAX 2.54(0.1) All dimensions in mm(inches) 0.25(0.010"). All pins on a 2.54(0.10") pitch and within 0.25(0.010") of true position. Weight: 6.0g All dimensions in mm(inches) 0.25(0.010"). All pins on a 2.54(0.10") pitch and within 0.25(0.010") of true position. TUBE OUTLINE DIMENSIONS 20.700.55 (0.8150.022) 16.700.80 (0.6570.031) 11.700.80 (0.4610.031) 5.500.25 (0.2170.010) 16.700.55 (0.6570.022) 6.800.55 (0.2680.022) 0.600.15 (0.0240.006) All dimensions in mm (inches) 0.5mm (0.020"). Tube length : 520mm 2mm (20.470.079"). Tube Quantity : 15 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. (c) 2017 Murata Power Solutions, Inc. www.murata-ps.com/support KDC_NDTD.G01 Page 7 of 7 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Murata: NDTD4812C NDTD4815C NDTD2415C NDTD2412C NDTD1203C NDTD1205C NDTD4803C NDTD0512C NDTD2403C NDTD0515C NDTD0505C NDTD4805C NDTD2405C NDTD0503C NDTD1212C NDTD1215C