ndl series isolated 2w wide input single output dc/dc converters kdc_ndl.f05 page 1 of 4 www.murata-ps.com www.murata-ps.com/support for full details go to www.murata-ps.com/rohs $ selection guide order code input voltage rated output voltage output current 1 input current 2 ef?ciency isolation capacitance mttf 4 min load 3 full load full load v (nom.) v ma ma ma % pf khrs ndl0505sc 5 5 100 400 606 66 26 2015 ndl0509sc 5 9 55 222 558 71 27 1998 ndl0512sc 5 12 42 167 559 71 26 1980 NDL0515SC 5 15 33 134 549 73 27 1965 ndl1205sc 12 5 100 400 228 73 39 1994 ndl1209sc 12 9 55 222 211 79 38 1981 ndl1212sc 12 12 42 167 208 80 47 1961 ndl1215sc 12 15 33 134 206 81 47 1947 ndl2405sc 24 5 100 400 112 74 37 1722 ndl2409sc 24 9 55 222 102 81 40 1711 ndl2412sc 24 12 42 167 100 83 51 1696 ndl2415sc 24 15 33 134 100 83 58 1685 ndl4805sc 48 5 100 400 57 73 39 1719 ndl4809sc 48 9 55 222 52 80 40 1709 ndl4812sc 48 12 42 167 51 81 53 1694 ndl4815sc 48 15 33 134 51 82 65 1683 input characteristics parameter conditions min. typ. max. units voltage range all ndl05 types 4.5 5 9 vdc all ndl12 types 9 12 18 all ndl24 types 18 24 36 all ndl48 types 36 48 72 re?ected ripple current all ndl05 types with 100f at input 250 ma p-p all ndl12 types with 100f at input 150 all ndl24 types with 10f at input 300 380 all ndl48 types with 10f at input 140 170 absolute maximum ratings short-circuit protection continuous lead temperature 1.5mm from case for 10 seconds 300c control pin input current 15ma input voltage 05 types 10v input voltage 12 types 20v input voltage 24 types 40v input voltage 48 types 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 speci?cations typical at t a =25c, nominal input voltage and rated output current unless otherwise speci?ed. 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 ? ef?ciency to 83% ? power density 0.9w/cm 3 ? 5v, 12v, 24v & 48v nominal input ? 5v, 9v, 12v & 15v output ? no electrolytic capacitors ? fully encapsulated ? external control ? low noise ? fully encapsulated description the ndl series is a range of high performance miniature dc/dc converters having regulated out- puts 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 isola- tion 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.
ndl series isolated 2w wide input single output dc/dc converters kdc_ndl.f05 page 2 of 4 www.murata-ps.com/support output characteristics parameter conditions 1 typ. max. units voltage set point accuracy all ndl05/12 input types with external input/output capacitors 1 3 % all ndl24/48 input types with external input/output capacitors 2 5 line regulation all ndl05/12 input types, low line to high line with external input/output capacitors 0.05 0.5 % all ndl24/48 input types, low line to high line with external input/output capacitors 0.04 0.4 load regulation all ndl05/12 input types, minimum load to rated load with external input/output capacitors 0.2 0.75 % all ndl24/48 input types, minimum load to rated load with external input/output capacitors 0.2 0.75 ripple b/w = 20mhz to 300khz with external input/output capacitors 5 10 mv rms noise all ndl05 input types, b/w =dc to 20mhz with external input/output capacitors 50 100 mv p-p all ndl12 input types, b/w =dc to 20mhz with external input/output capacitors 110 170 all ndl24/48 input types, b/w =dc to 20mhz with external input/output capacitors 50 100 shutdown power +v in nominal 2.8 mw isolation characteristics parameter conditions min. typ. max. units isolation test voltage flash tested for 1 second 1000 v dc resistance v iso = 1000v dc 1g general characteristics parameter conditions min. typ. max. units control pin (ctrl) input current please refer to control pin application note 6 10 15 ma switching frequency max. rated load to min. rated load, v in min. to v in . max. 100 600 khz temperature characteristics parameter conditions min. typ. max. units operation -40 85 oc storage -50 130 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 speci?ed time, across a component designed to provide electrical isolation, to verify the integrity of that isola tion. 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 speci?c agency approvals, such as the ndl series, both input and output should normally be maintained wit hin 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 a n 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; bu t 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 circui ts 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 secondar y 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 m aterial, including this enamel (typically polyurethane) is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tes ts 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% fr om speci?ed 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.
ndl series isolated 2w wide input single output dc/dc converters kdc_ndl.f05 page 3 of 4 www.murata-ps.com/support 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) c in c out 5 & 12 100f, 25v 100f, 25v 24 & 48 10f, 200v 100f, 25v test circuit 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 (hig h impedance), the converter will be on (there is no allowed low state for this pin), but once a control voltage is applied with suf?cient drive current, the converter will be s witched off. a suitable application circuit is shown below. d 1 (e.g. 1n4001) is required to provide high impedence when the signal is low. from the ndl speci?cation, the drive current to operate this function is recommended to be 10ma, and hence the value of r 1 can be derived as follows: r 1 = assuming v c =5v, v d =0.7v and v q =1v: r 1 = = 330 pin 8 (c s ) 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 bene?t of this access point over simple additional output capacitance is that it precedes the out put ?lter inductor. maximum values of external capacitance will be dependent on the output voltage, the loading of the converter and the desired ripple ?gure. values can be u p to 100f. minimum load the minimum load for correct operation is 25% of the full rated load across the speci?ed input voltage range. lower loads may c ause a signi?cant increase in output ripple and may cause the output voltage to exceed its speci?cation transiently during power-down when the input voltage also falls bel ow its rated minimum. ndl v in v c ov -v in ctrl r 1 d 1 q 1 r 2 v c - v d - v q i c 5 - 0.7 - 1.0 10 x 10 -3 ndl c out c in - v in + v in + v out supply + v in supply - v in - v out rohs compliant information this series is compatible with rohs soldering systems with a peak wave solder temperature of 300oc for 10 seconds. the pin termination ?nish 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. for further information, please visit www.murata-ps.com/rohs ndl05 power derating curve 4.5 isolation voltage (v) output power (w) 0.5 0 56789 1.0 1.5 1.75 2.0 2.5
ndl series isolated 2w wide input single output dc/dc converters kdc_ndl.f05 page 4 of 4 www.murata-ps.com/support 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 her ein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. speci?cations are subject to chan ge without notice. ? 2012 murata power solutions, inc. murata power solutions, inc. 11 cabot boulevard, mans?eld, ma 02048-1151 u.s.a. iso 9001 and 14001 registered 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/ package specifications mechanical dimensions pin connections pin function 1-v in 2+v in 3 ctrl 5* ic 6+v out 7-v out 8c s * 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. recommended footprint details tube outline dimensions 0.858 (21.80) 0.362 (9.20) 0.437 (11.10) 0.181 (4.60) 0.142 (3.60) 0.1 (2.54) 0.022 (0.55) 0.0178 (0.45) 0.0790.02 (2.010.50) 0.0118 (0.30) 0.0079 (0.20) 0.126 (3.20) 0.022 (0.55) 0.0178 (0.45) 1 2 3 5 6 7 8 ndl4805sc xyyww
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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: 5.0g all dimensions in inches 0.01 (mm 0.5mm). tube length : 20.470.079 (520mm 2mm). tube quantity : 23 all dimensions in inches 0.01 (mm 0.5mm).
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