wra wra wra wra wra wra wra wra - - - - - - - - ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - ymd ymd ymd ymd ymd ymd ymd ymd -3w -3w -3w -3w -3w -3w -3w -3w series series model model model model model model model model selection selection selection selection selection selection selection selection wrb wrb wrb wrb wrb wrb wrb wrb 48 48 48 48 48 48 48 48 05 05 05 05 05 05 05 05 y y y y y y y y m m m m m m m m d d d d d d d d - - - - - - - - 3w 3w 3w 3w 3w 3w 3w 3w product series input voltage output voltage wide (2:1) input range metal shield dip package style rated power o rder code input output efficiency (%,typ) voltage(vdc) voltage (vdc) current(ma) nominal range max* max. min. wra0505ymd-3w 5 4.5-9 11 5 300 30 68 wra0512ymd-3w 5 4.5-9 11 12 125 12 72 wra0515ymd-3w 5 4.5-9 11 15 100 10 71 wrb0505ymd-3w 5 4.5-9 11 5 600 60 68 wrb0512ymd-3w 5 4.5-9 11 12 250 25 72 wrb0515ymd-3w 5 4.5-9 11 15 200 20 71 wra1205ymd-3w 12 9-18 22 5 300 30 76 wra1212ymd-3w 12 9-18 22 12 125 12 80 wra1215ymd-3w 12 9-18 22 15 100 10 80 wrb1205ymd-3w 12 9-18 22 5 600 60 77 wrb1209ymd-3w 12 9-18 22 9 333 33 78 wrb1212ymd-3w 12 9-18 22 12 250 25 80 wrb1215ymd-3w 12 9-18 22 15 200 20 81 wrb1224ymd-3w 12 9-18 22 24 125 12 80 wra2405ymd-3w 24 18-36 40 5 300 30 77 wra2412ymd-3w 24 18-36 40 12 125 12 80 wra2415ymd-3w 24 18-36 40 15 100 10 80 wrb2405ymd-3w 24 18-36 40 5 600 60 77 wrb2409ymd-3w 24 18-36 40 9 333 33 79 WRB2412YMD-3W 24 18-36 40 12 250 25 81 wrb2415ymd-3w 24 18-36 40 15 200 20 81 wrb2424ymd-3w 24 18-36 40 24 125 12 80 wra4805ymd-3w 48 36-72 80 5 300 30 77 wra4812ymd-3w 48 36-72 80 12 125 12 80 wra4815ymd-3w 48 36-72 80 15 100 10 81 wrb4805ymd-3w 48 36-72 80 5 600 60 77 wrb4809ymd-3w 48 36-72 80 9 333 33 79 wrb4812ymd-3w 48 36-72 80 12 250 25 81 wrb4815ymd-3w 48 36-72 80 15 200 20 81 wrb4824ymd-3w 48 36-72 80 24 125 12 80 wrb11012ymd-3w 110 72-144 155 12 250 25 80 wrb11024ymd-3w 110 72-144 155 24 125 12 78 * input voltage can t exceed this value,or will cause the permanent damage. 3w, 3w, 3w, 3w, wide wide wide wide input, input, input, input, isolated isolated isolated isolated & & & & regulated regulated regulated regulated dual/single dual/single dual/single dual/single output output output output dc-dc dc-dc dc-dc dc-dc converter converter converter converter features features features features features features features features wide (2:1) input range s hort circuit protection (automatic recovery) 1500vdc isolation operating temperature: -40 85 n o heat sink required no external component required internal smd required five sided metal shielding mtbf>1000khours applications applications applications applications applications applications applications applications the wra_ymd-3w&wrb_ymd-3w series are specially designed for applications where a wide range input voltage 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 p ower supply is wide range (voltage range 2:1); 2) where isolation is necessary between input and output (isolation voltage 1500vdc); 3) where the regulation of the output voltage and the output ripple noise are demanded. microdc reserves the copyright http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 1/4 selection selection selection selection selection selection selection selection guide guide guide guide guide guide guide guide
wra wra wra wra wra wra wra wra - - - - - - - - ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - ymd ymd ymd ymd ymd ymd ymd ymd -3w -3w -3w -3w -3w -3w -3w -3w series series requirement on output load in order to ensure the product operate efficiently and reliably , in addition to a max load(namely full load), a minimum load is specified for this kind of dc/dc converter . make sure the specified range of input voltage is not exceeded , the minimum output load no less than 10% load.if the actual load is less than the specified minimum load, the output ripple may increase sharply while its efficiency and reliability will reduce greatly . if the actual output power is very small , please add an appropriate resistor as extra loading , or contact our company for other lower output power products. typical typical typical typical typical typical typical typical characteristics characteristics characteristics characteristics characteristics characteristics characteristics characteristics temperature derating graph recommended recommended recommended recommended recommended recommended recommended recommended circuit circuit circuit circuit circuit circuit circuit circuit output graph output external capacitor table(table 1) single vout cout dual vout cout (vdc) ( f) (vdc) ( f) 3.3 2200 5 680 5 1000 9 470 9 680 12 330 12 470 1 5 220 15 330 ---- ---- 24 220 ---- ---- parameter conditions min. typ. max. units output power refer to products program 0.3 3 w positive voltage accuracy refer to recommended circuit 1 3 % negative voltage accuracy refer to recommended circuit 3 5 % load regulation form 10% to 100% load 0.5 1* % line regulation input voltage from low to high 0.2 0.5 % temperature drift (vout) refer to recommended circuit 0.03 %/ c ripple & noise** 20mhz bandwidth 75 150 mvp-p switching frequency 100% load, input voltage range 300 khz * dual output models unbalanced load: 5%. ** test ripple and noise by parallel cable method. see detailed operation instructions at testing of power converter section, application notes. temperature temperature temperature temperature temperature temperature temperature temperature characteristics characteristics characteristics characteristics characteristics characteristics characteristics characteristics http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 2/4 common common common common common common common common specifications specifications specifications specifications specifications specifications specifications specifications parameter conditions min. typ. max. units storage humidity 95 % operating temperature -40 1 85 storage temperature -55 3 125 temp. rise at full load 15 lead temperature 1.5mm from case for 10 seconds 300 cooling free air convection short circuit protection continuous, automatic recovery case material aluminium alloy no-load power consumption 0.2 w isolation voltage tested for1 minute and 1ma max 1500 vdc isolation resistance test at 500vdc 1000 m isolation capacitance input/output 100 pf mtbf 1000 k hours weight 15 g application application application application application application application application note note note note note note note note
wra wra wra wra wra wra wra wra - - - - - - - - ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - ymd ymd ymd ymd ymd ymd ymd ymd -3w -3w -3w -3w -3w -3w -3w -3w series series recommended circuit all the wra_ymd-3w&wrb_ymd-3w series have been tested according to the following recommended testing circuit before leaving factory . this series should be tested under load(see figure 1). if you want to further decrease the input/output ripple , you can increase capacitance properly or choose capacitors with low esr . 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) . general: cin: 5v&12v 100 f 24v&48v 10 f-47 f cout: 10 f/100ma input current while using unstable power source , please ensure the output voltage and ripple voltage do not exceed indexes of the converter . the preceding power source must be able to provide for converter sufficient starting current i p(figure 2).general: i p 1.4*iin-max no parallel connection or plug and play note: unit:mm[inch] pin section tolerances: 0.10mm[ 0.004inch] general tolerances: 0.25mm[ 0.010inch] application application application application application application application application note note note note note note note note outline outline outline outline outline outline outline outline dimensions dimensions dimensions dimensions dimensions dimensions dimensions dimensions footprint footprint footprint footprint footprint footprint footprint footprint details details details details details details details details mechanical mechanical mechanical mechanical mechanical mechanical mechanical mechanical dimensions dimensions dimensions dimensions dimensions dimensions dimensions dimensions recommended recommended recommended recommended recommended recommended recommended recommended footprint footprint footprint footprint footprint footprint footprint footprint recommended footprint top view,grid:2.54mm(0.1inch) diameter:1.00mm(0.039inch) http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 3/4
wra wra wra wra wra wra wra wra - - - - - - - - ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w ymd-3w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - ymd ymd ymd ymd ymd ymd ymd ymd -3w -3w -3w -3w -3w -3w -3w -3w series series pin single dual 1 gnd gnd 2 vin vin 3 +vo +vo 4 n c 0v 5 0v -vo nc:no connection outline outline outline outline outline outline outline outline dimensions dimensions dimensions dimensions dimensions dimensions dimensions dimensions footprint footprint footprint footprint footprint footprint footprint footprint details details details details details details details details footprint footprint footprint footprint footprint footprint footprint footprint details details details details details details details details tube tube tube tube tube tube tube tube outline outline outline outline outline outline outline outline dimensions dimensions dimensions dimensions dimensions dimensions dimensions dimensions note: unit :mm[inch] general tolerances: 0.50mm[ 0.020inch] l=530mm[20.866inch] tube quantity: 19pcs l=220mm[8.661inch] tube quantity: 7pcs when the environment temperature is higher than 71 , the product output power should be less then 60% of the rated power. no parallel connection or plug and play. use dual output simultaneously , forbid opening output pin (0v) to use as single output. 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. 5. only typical models listed, other models may be different, please contact our technical person for more details. 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 rohs rohs rohs compliant compliant compliant compliant information information information 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 reach reach reach compliant compliant compliant compliant information information information 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. http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 4/4
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