a-xm a-xm B-XLM B-XLM s s eries eries http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 1 of 2 selection selection guide guide order code input output efficiency (%,typ) switching frequency (khz,typ) voltage (vdc) voltage (vdc) current nominal range max min a0505xm 5 4.5-5.5 5 100 10 70 84 a0509 x m 5 4.5-5.5 9 56 6 75 81 a0512 x m 5 4.5-5.5 12 42 5 78 82 a0515 x m 5 4.5-5.5 15 33 4 79 83 a1205 x m 12 10.8-13 5 100 10 72 180 a1209 x m 12 10.8-13 9 56 6 75 150 a1212 x m 12 10.8-13 12 42 5 77 84 a1215 x m 12 10.8-13 15 33 4 79 83 b0505 x lm 5 4.5-5.5 5 200 20 70 82 b0509 x lm 5 4.5-5.5 9 111 12 75 83 b0512 x lm 5 4.5-5.5 12 83 9 79 83 b0515 x lm 5 4.5-5.5 15 67 7 80 80 b1205 x lm 12 10.8-13 5 200 20 72 84 b1209 x lm 12 10.8-13 9 111 12 75 81 b1212 x lm 12 10.8-13 12 83 9 77 82 b1215 x lm 12 10.8-13 15 67 7 79 83 b2405 x lm 24 21.6-26 5 200 20 70 82 b2409 x lm 24 21.6-26 9 111 12 73 83 b2412 x lm 24 21.6-26 12 83 9 75 83 b2415 x lm 24 21.6-26 15 67 7 78 80 b2424 x lm 24 21.6-26 24 42 5 77 84 model model selection selection b b 05 05 05 05 x x lm lm product series input voltage output voltage fixed input package style microdc r eserves the copyright 1w, fixed input, isolated&unregulated dual/single output,superminiature sip package features features rohs compliant efficiency up to 80% miniature sip package style wide temperature performance at full 1 watt load,-40 c to 85 c ul 94v-0 package material no heatsink required industry standard pinout power sharing on output 1kvdc isolation continuous short circuit protection internal smd construction no external components required applications applications the a_ x m-1w&b_ x lm-1w series are specially designed for applications where a group of polar power supplies are isolated from the input power supply in a distributed power supply system on a circuit board. these products apply to: 1) where the voltage of the input power supply is fixed (voltage variation 10%); 2) where isolation is necessary between input and output (isolation voltage 1000vdc); 3) where the regulation of the output voltage and the output ripple noise are not demanding. such as: purely digital circuits, ordinary low frequency analog circuits, and igbt power device driving circuits. output output specifications specifications parameter test conditions min. typ. max unit output power 0.1 1 w line regulation for vin change of 1% 1.2 % load regulation 10% to 100% full load(5v output) 10 15 10% to 100% full load(9v output) 8.3 10 10% to 100% full load(12v output) 6.8 10 10% to 100% full load(15v output) 6.3 10 10% to 100% full load( 24 v output) 5 10 output voltage see tolerance envelope graph temperature drif t 100% full load 0.03 %/ c output ripple&noise * 20mhz bandwidth(a - xm - 1w) 50 75 mv p-p 20mhz bandwidth(b - xlm - 1w) 75 100 switching frequency 100% load, nominal input(5v,12v) 100 khz 100% load, nominal input(24v) 500 * test ripple and noise by "parallel cable" method. see detailed operation instructions at testing of power converter section, application notes. isolation isolation specifications specifications parameter test conditions min. typ. max. units isolation test voltage flash tested for 1 minute and 1ma max 1000 vdc isolation resistance test at viso=500vdc 1000 m
a-xm a-xm B-XLM B-XLM s s eries eries http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 2 of 2 common common specifications specifications parameter conditions min. typ. max. units storage humidity range 95 % operating temperature -40 85 storage temperature -55 125 lead temperature 1.5mm from case for 10 seconds 300 temp.rise at full load 15 25 cooling free air convection case material plastic(ul94-v0) short circuit protection* continuous 1 s mtbf 3500 k hours weight 2.1 g *supply voltage must be discontinued at the end of short circuit duration. typical typical characteristics characteristics temperature derating graph outline outline dimensions dimensions & & pin pin connections connections size graph recommended footprint top view,grid:2.54mm(0.1inch) diameter:1.00mm(0.039inch) footprint footprint details details pin single dual 1 vin vin 2 gnd gnd 4 0v - v o 5 nc 0v 6 +v o +v o n c - not available for electrical connection. note: unit:mm(inch) pin section:0.50*0.3mm(0.020*0.012inch) pin section tolerances: 0.10mm( 0.004inch) general tolerances: 0.25mm( 0.010inch) requirement on output load to ensure this module can operate efficiently and reliably, a minimum load is specified for this kind of dc/dc converter in addition to a maximum load(namely full load).during operation, make sure the specified range of input voltage is not exceeded,the minimum output load is not less than 10% of the full load, and that this product should never be operated under no load! overload protection under normal operating conditions, the output circuit of these products has no protection against overload. the simplest method is to connect a self-recovery fuse in series at the input end or add a circuit breaker to the circuit. recommended testing and application circuit if you want to further decrease the input/output ripple, an lc filtering network may be connected to the input and output ends of the dc/dc converter, see (figure 1). it should also be noted that the inductance and the frequency of the lc filtering network should be staggered with the dc/dc frequency to avoid mutual interference. however, the capacitance of the output filter capacitor must be proper. if the capacitance is too big, a startup problem might arise. for every channel of output, provided the safe and reliable operation is ensured, the greatest capacitance of its filter capacitor sees (table 1). external capacitor table (table 1) vin cin single v out cout dual v out cout (vdc) ( f) (vdc) ( f) (vdc) ( f) 5 47 5 10 5 4.7 12 2.2 9 4.7 9 2.2 24 1.0 12 2.2 12 1.0 -- -- 15 1 15 0.47 it's not recommend to connect any external capacitor in the application field with less than 0.5 watt output. output voltage regulation and over-voltage protection circuit the simplest device for output voltage regulation, over-voltage and over-current protection is a linear voltage regulator with overheat protection that is conn ec ted to the in put or outp ut en d in ser i es (f i gu r e 2) . when the environment temperature is higher than 71 c, the product output power should be less th a n 60% of the rated power. no parallel connection or plug and play. microdc professional power module,inc. tel:0086-20-86000646 e-mail:tech@microdc.cn website:http://www.microdc.cn 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.
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