a a -x -x d&a-xs d&a-xs series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 1 of 5 selection selection guide guide order code input output efficiency isolation capacitance mttf 1 voltage(vdc) current (ma) voltage (vdc) current (ma) (%.typ.) nominal max pf khrs a0505 x s 5 289 5 100 69 28 3103 a0509 x s 5 267 9 55 75 32 2257 a0512 x s 5 260 12 42 77 34 1579 a0515 x s 5 256 15 33 78 36 1065 a1205 x s 12 120 5 100 69 33 2193 a1209 x s 12 113 9 55 74 46 1734 a1212 x s 12 111 12 42 75 55 1303 a1215 x s 12 110 15 33 76 54 932 a1505 x s 15 91 5 100 71 39 1941 a1512 x s 15 87 12 42 78 68 790 a2412 x s 24 52 12 42 80 65 134 a2415 x s 24 52 15 33 80 95 101 a4805 x s 48 30 5 100 70 26 206 a4809 x s 48 26 9 55 80 38 174 a4812 x s 48 26 12 42 80 52 139 a4815 x s 48 26 15 33 80 56 104 a0505 x d 5 289 5 100 69 28 3103 a0509 x d 5 267 9 55 75 32 2257 a0512 x d 5 260 12 42 77 34 1579 a0515 x d 5 256 15 33 78 36 1065 a1205 x d 12 120 5 100 69 33 2193 a1209 x d 12 113 9 55 74 46 1734 a1212 x d 12 111 12 42 75 55 1303 a1215 x d 12 110 15 33 76 54 932 a1505 x d 15 91 5 100 71 39 1941 a1512 x d 15 87 12 42 78 68 790 a2412 x d 24 52 12 42 80 65 134 a2415 x d 24 52 15 33 80 95 101 a4805 x d 48 30 5 100 70 26 206 a4809 x d 48 26 9 55 80 38 174 a4812 x d 48 26 12 42 80 52 139 a4815 x d 48 26 15 33 80 56 104 1. calculated using mil-hdbk-217f with nominal input voltage at full load. all speci ? cations typical at ta=25 c, nominal input voltage and rated output current unless otherwise speci ? ed. model model selection selection a a 05 05 05 05 x x s s product series input voltage output voltage fixed input s ip package microdc r eserves the copyright isolated 1w dual output dc/dc converters features features footprint from 1.17cm 2 i/o isolation voltage 1 000vdc operating temperature: -40 85 high efficiency up to 80% fully encapsulated toroidal magnetics internal smd construction power density up to 0.85 w/cm 3 no electrolytic or tantalum capacitors 5v,9v,12v and 15v output no heatsink required dual output from a single input rail ul 94v-0 package material no external components required industry standard pinout power sharing on output mttf up to 3.1 million hours applications applications the a - x( s )d series of industrial temperature range dc/dc converters are the standard building blocks for on-board distributed power systems.they are ideally suited for providing dual rail supplies on primarily digital boards with the added benefit of galvanic isolation to reduce switching noise.all of the rated power may be drawn from a single pin provided the total load does not exceed 1 watt. input input characteristics characteristics parameter conditions min. typ. max. units voltage range continuous operation, 5 v input 4.5 5 5.5 vdc continuous operation, 12 v input 10.8 12 13.2 vdc continuous operation, 1 5 v input 13.5 15 16.5 vdc continuous operation, 24 v input 21.6 24 26.4 vdc continuous operation, 48 v input 43.2 48 52.8 vdc reflected ripple current 20 40 ma p-p absolute absolute maximum maximum ratings ratings parameter conditions lead temperature 1.5mm from case for 10 second s 300 internal power dissipation 450mw input voltage v , a0 5 types 7v input voltage v in , a 12 types 15v input voltage v in , a1 5 types 18v input voltage v in , a 24 types 28v input voltage v in , a 48 types 54v
a a -x -x d&a-xs d&a-xs series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 2 of 5 output output specifications specifications parameter conditions min. typ. max. units rated power ta= - 40 c to 120 c 1.0 w rated power (a24 a48) ta=0 c to 70 c 1.0 w voltage set point accuracy see tolerance envelope line regulation high vin to low vin 1.0 1.2 %% line regulation (a24 a48) high vin to low vin 1.2 %% load regulation (a24 a48) 10% load to rated load, 5v output type s 15 % 10% load to rated load,all other output type s 10 % load regulation (5vinput 12vinput) 10% load to rated load, 5v output type s 10 12.5 % 10% load to rated load, 9 v output type s 9 10 % 10% load to rated load, 12 v output type s 6.5 7.5 % 10% load to rated load, 1 5v output type s 6 7.0 % load regulation (15v input) 10% load to rated load, 5v output type s 5.5 10 % 10% load to rated load, 12 v output type s 2.6 3.0 % 10% load to rated load, 1 5v output type s 2.3 3.0 % ripple noise (a24 a48) bw=dc to 20mhz, all input type s 150 mv p-p ripple noise bw=dc to 20mhz, 5v output type s 10 20 mv p-p bw=dc to 20mhz, 9v output type s 7 15 mv p-p bw=dc to 20mhz, 12v output type s 7.5 15 mv p-p bw=dc to 20mhz, 15v output type s 8 15 mv p-p temperature temperature characteristics characteristics conditions parameter conditions min. typ. max. units specification a05 a12 a15 -40 85 specification a24 a48 0 70 storage a05 a12 a15 -50 130 storage a24 a48 -55 150 case temperature rise above ambient 0505,1205 33 0509,0512,0515,1209,1212,1215 28 1505 26 1512,1515 17 cooling free air convection general general characteristics characteristics parameter conditions min. typ. max. units switching frequency 5v input types 110 khz 12v input types 140 khz 15v input types 90 khz switching frequency(a24 a48) all input type s 100 khz temperature temperature derating derating graph graph tolerance tolerance envelope envelope 85 c 70 c 5v & 12v input 24v & 48v input ambient temperature ( c) o u t p u t p o w e r ( w ) isolation isolation characteristics characteristics parameter conditions min. typ. max. units isolation voltag e flash tested for 1 secon d 1000 vdc resistanc e viso= 1000vd c 10 g ? resistanc e(a24 a48) viso= 50 0vd c 10 g ?
a a -x -x d&a-xs d&a-xs series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 3 of 5 technical technical notes notes isolation voltage "hi pot test","flash tested","withstand 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. professional power module a 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 a 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-acssible 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 greatre degree depending on materials. construction and environment. the a 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 for better than functional isolation where the wire enamel insulation is always supplemented by a further insulation system of physical spacing or barriers. technical technical notes 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: ceramic chip capacitors are recommended. it is required that the esr(equivalent series resistance)should be as low as possible.x7r 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 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. ripple & noise characterisation method ripple and noise measurements are performed with the following test con ? guration. c1 1 f x7r multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the dc/dc converter c2 10 f 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 100m at 100 khz c3 100nf multilayer ceramic capacitor, general purpose r1 450 resistor, carbon ? lm, 1% tolerance r2 50 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 r3 50 resistor, carbon film, 1% measured values are multiplied by 10 to obtain the speci ? ed values. differential mode noise test schematic
a a -x -x d&a-xs d&a-xs series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 4 of 5 recommended recommended footprint footprint details details 14 14 pin pin dip dip package package 7 7 pin pin sip sip package package outline outline dimensions dimensions footprint footprint details details mechanical mechanical dimensions dimensions dip dip package package sip sip package package all all dimensions dimensions in in inches inches 0.01(mm 0.01(mm 0.25mm).all 0.25mm).all pins pins on on a a 0.1(2.54) 0.1(2.54) pitch pitch and and within within 0.01(0.25)of 0.01(0.25)of true true position. position. weight: 2.4g (dip) 2.1g (sip) footprint footprint details details -14 -14 pin pin dip dip -7 -7 pin pin sip sip p p in in function function p p in in f f unction unction 1 1 -v in 1 1 +v in 7 7 nc 2 2 -v in 8 8 0v 4 4 -v out 9 9 +v out 5 5 0v 11 11 -v out 6 6 +v out 14 14 +v in n c - not available for electrical connection. specifcations can be changed any time without notice. no parallel connection or plug and play. note: 1. the load shouldn't be less than 10%, otherwise ripple will increase dramatically. 2. operation under 10% load will not damage the converter; however, they may not meet all specification listed. 3. all specifications measured at ta=25 c, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 4. in this datasheet, all the test methods of indications are based on corporate standards.
a a -x -x d&a-xs d&a-xs series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 5 of 5 tube tube outline outline dimensions dimensions 14 14 pin pin dip dip tube tube 7 7 pin pin sip sip tube tube unless otherwise stated all dimensions in inches (mm) 0.5mm. tube length (14 pin dip) : 20.47 (520mm 2mm). tube length (7 pin sip) : 20.47 (520mm 2mm). tube quantity :25
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