2b 2b -x -x nm nm series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 1 of 4 selection selection guide guide order code input voltage (v) output voltage (v) output current ( m a) input current ( rated load ) ( m a) efficiency (%) isolation capacitance (pf) mttf 1 (khrs) 2b 0505 xnm 5 5 400 513 78 19 2327 2b 05 09xnm 5 9 222 492 81 27 1393 2b 05 12xnm 5 12 167 479 84 32 832 2b 05 15xnm 5 15 133 481 83 27 481 2b 1205xnm 12 5 400 207 81 28 716 2b 1209xnm 12 9 222 198 84 42 593 2b 1212xnm 12 12 167 197 85 46 461 2b 12 15 xnm 12 15 133 197 85 54 328 2b 2405xnm 24 5 400 104 80 60 315 2b 2409xnm 24 9 222 100 83 65 302 2b 2412xnm 24 12 167 99 84 78 295 2b 2415xnm 24 15 133 99 84 58 282 model model selection selection 2 2 b b 05 05 05 05 x x n n m m product series input voltage output voltage fixed input negation layout package style microdc r eserves the copyright isolated 2 w single output dc/dc converters features features footprint from 1.05cm 2 i/o isolation voltage 1 000vdc operating temperature: -40 85 high efficiency up to 85% fully encapsulated toroidal magnetics internal smd construction custom solutions available no electrolytic or tantalum capacitors 5v,9v,12v and 15v output no heatsink required pin compatible with b-x n (s) d series ul 94v-0 package material no external compo nents required industry standard pinout power density 2.01w/cm 3 mttf up to 2.3 million hours applications applications the 2 b-xnm series of dc/dc converters is particularly suited to isolating and/or converting dc power rails. the galvanic isolation allows the device to be con ? gured to provide an isolated negative rail in systems where only positive rails exist.the wide temperature range guarantees startup from C 40 c and full 2 watt output at 85 c. pin compatibility with the b-x n (s) d-1w ensures ease of upgradeability. input input characteristics characteristics parameter conditions min typ max. units voltage range continuous operation, 5 v input types 4.5 5 5.5 v continuous operation, 12 v input types 10.8 12 13.2 continuous operation, 24 v input types 21.6 24 26.4 reflected ripple current 5v input types 33 ma p-p 12v input type s 38 ma p-p isolation isolation characteristics characteristics parameter conditions min. typ max. unit isolation test voltage 1 second 1000 vdc resistance viso= 500vdc 10 g ? 1. calculated using mil-hdbk-217fn2 calculation model with nominal input voltage at full load. 2.supply voltage must be disconnected at the end of the short circuit duration. all specifications typical at ta=25 c,nominal input voltage and rated output current unless otherwise specified. output output characteristics characteristics parameter conditions min typ. max. units rated power ta=-40 c to 85 c 2 w voltage set point accuracy see tolerance envelope line regulation high vin to low vin 1.0 1.2 %% load regulation 10% load to rated load 5v output 7 8.5 % 9v output 4.5 5.2 % 12v output 4.5 5.5 % 15v output 3.7 8.5 % ripple and noise b0505xnm,bw=dc to 20mhz 96 200 ma p-p b0509xnm,bw=dc to 20mhz 67 200 ma p-p b0512xnm,bw=dc to 20mhz 59 200 ma p-p b0515xnm,bw=dc to 20mhz 53 200 ma p-p b1205xnm,bw=dc to 20mhz 76 200 ma p-p b1209xnm,bw=dc to 20mhz 63 200 ma p-p b1212xnm,bw=dc to 20mhz 53 200 ma p-p b1215xnm,bw=dc to 20mhz 45 200 ma p-p absolute absolute maximum maximum ratings ratings short-circuit protection 2 1 second lead temperature 1.5mm from case for 10 seconds 300 c internal power dissipation 805mw input voltage vin,b05 types 7v input voltage vin,b12 types 15v input voltage vin,b 24 types 28v
2b 2b -x -x nm nm series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 2 of 4 minimum minimum load load the minimum load to meet datasheet speci ? cation is 10% of the full rated load across the speci ? ed input voltage range. lower than 10% minimum loading will result in an increase in output voltage, which may rise to typically double the speci ? ed output voltage if the output load falls to less than 5%. capacitive capacitive loading loading and and start start up up typical start up times for this series, with a typical input voltage rise time of 2.2s and output capacitance of 10f, are s ho wn in the table below. the product series will start into a capacitance of 47f with an increased start time, however, the maximum recommended output capacitance is 10f . start-up time b0505 xnm 790 b05 09xnm 1154 b05 12xnm 2265 b05 15xnm 2998 b 1205xnm 396 b 1209xnm 880 b 1212xnm 1156 b 12 15 xnm 2394 temperature temperature characteristics characteristics conditions parameter conditions min. typ. max. units specification all output types -40 85 storage -50 130 case temperature above ambient 5v output types 45 all other output types 36 coolin g free air convection general general characteristics characteristics parameter conditions min. typ. max. units switching frequency 5v input types 90 khz 12v input type s 90 khz temperature temperature derating derating graph graph tolerance tolerance envelope envelope 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.
2b 2b -x -x nm nm series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 3 of 4 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 b -xnm 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?" the b -xnm series has been recognized by underwriters laboratory for functional insulation. 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 greater degree depending on materials. construction and environment. the b -xnm 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. output output ripple ripple reduction reduction 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. characterisation test methods 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 measured values are multiplied by 10 to obtain the speci ? ed values. differential mode noise test schematic
2b 2b -x -x nm nm series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 4 of 4 package package specifications specifications mechanical mechanical dimensions dimensions sip sip package package all all dimensions dimensions in in inches inches 0.01(mm 0.01(mm 0.25mm). 0.25mm). all 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: weight: 2.0g 2.0g footprint footprint details details pin pin connections-4 connections-4 pin pin sip sip pin pin f f unction unction 1 1 v in 2 2 gnd 3 3 0 4 4 +v o specifcation s 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 data sheet, all the test methods of indications are based on corporate standards. microdc professional power module,inc. tel:0086-20-86000646 e-mail:tech@microdc.cn website:http://www.microdc.cn microdc professional power module,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. specifications are subject to change without notice. ? 2010 microdc professional power module, inc. guangzhou rohs compliant information this series is compatible with rohs soldering systems with a peak wave solder temperature of 300 c for 10 seconds. the pin termination finish on the sip package type is tin plate, hot dipped over matte tin with nickel preplate. the dip types are matte tin over nickel preplate. both types in this series are backward compatible with sn/pb soldering systems. reach compliant information this series has proven that this product does not contain harmful chemicals, it also has harmful chemical substances through the registration, inspection and approval. recommended recommended footprint footprint details details 4 4 pin pin sip sip package package unless otherwise stated all dimensions in inches (mm) 0.5mm. tube tube outline outline dimensions dimensions 4 4 pin pin sip sip tube tube unless otherwise stated all dimensions in inches (mm) 0.5mm. tube length ( 4 pin sip) : 20.47 (520mm 2mm). tube quantity : 3 5
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