the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. wra_lt_3w & wrb_lt_3w b/4-2012 page 1 of 3 wra_lt-3w & wrb_lt-3w series 3w, wide input, isolated & regulated single/dual output dc/dc converter patent protection rohs features product program input output voltage (vdc) current (ma) part number nominal range max** voltage (vdc) max. min. efficiency (%, typ.) wra0505lt-3w 5 300 30 72 wra0512lt-3w 12 125 13 74 wra0515lt-3w 15 100 10 75 WRB0505LT-3W 5 600 60 72 wrb0512lt-3w 12 250 25 74 wrb0515lt-3w 5 4.5-9 11 15 200 20 75 wra1205lt-3w 5 300 30 76 wra1212lt-3w 12 125 13 79 wra1215lt-3w 15 100 10 79 wrb1205lt-3w 5 600 60 74 wrb1212lt-3w 12 250 25 79 wrb1215lt-3w 12 9-18 22 15 200 20 79 wra2405lt-3w 5 300 30 76 wra2412lt-3w 12 125 13 79 wra2415lt-3w 15 100 10 79 wrb2405lt-3w 5 600 60 76 wrb2412lt-3w 12 250 25 79 wrb2415lt-3w 24 18-36 40 15 200 20 79 wra4805lt - 3w 5 300 30 76 wra4812lt-3w 12 125 13 79 wra4815lt - 3w 15 100 10 79 wrb4805lt-3w 5 600 60 76 wrb4812lt - 3w 12 250 25 79 wrb4815lt-3w 48 36-72 80 15 200 20 79 note: 1.models listed with strike-through text have been officially discontinued. 2.*designing. 3.**input voltage can t exceed this value, or will cause the permanent damage. common specifications item test conditions min. typ. max. units storage humidity 95 % operating temperature -40 85 storage temperature -55 125 temp. rise at full load 15 lead temperature 1.5mm from case for 10 seconds 300 c short circuit protection continuous, automatic recovery cooling free air convection package material epoxy resin (ul94-v0) mtbf 1000 k hours weight 5.2 g 2:1 wide input voltage range operating temperature: -40 c ~ +85 c 1500vdc isolation no heatsink required internal smd construction mtbf>1,000,000 hours short circuit protection (automatic recovery) industry standard pinout rohs compliance applications the wra_lt-3w & wrb_lt-3w s eries are sp ecially 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 power 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. model selection wrb2412lt-3w rated power package style output voltage input voltage product series mornsun science & technology co.,ltd. address: no. 5, kehui st. 1, kehui development center, science ave., guangzhou science city, luogang district, guangzhou,p.r.china. tel: 86-20-38601850 fax:86-20-38601272 http://www.mornsun-power.com
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. wra_lt_3w & wrb_lt_3w b/4-2012 page 2 of 3 isolation specifications typical temperature curve item test conditions min. typ. max. units isolation voltage tested for 1 minute and 1ma m ax 1500 vdc isolation resistance test at 500vdc 1000 m isolation capacitance input/output, 100khz/1v 1000 pf output specifications item test conditions min. typ. max. units output power see above 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 from 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 output ripple& noise** 20mhz bandwidth 35 100 mvp-p switching frequency 100% load, nominal input voltage 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. operating temp.( ) c 100 0 50 100 150 200 250 time (sec.) t e m p e r a t u r e ( c ) 60 max (>220 c) sec 220 c 10 max sec peak.temp 240 c remark: the curve applies only to the hot air reflow soldering application note recommended circuit 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. recommended circuit all the wra_lt-3w & wrb_lt-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 when it is used in unregulated power supply, be sure that the fluctuating range of the power supply and the rippled voltage do not exceed the module standard. input current of power supply should afford the flash startup current of this kind of dc/dc module (figure 2), general: ip 1.6*iin-max(vin=5v) ip 1.4*iin-max(vin=12v/24v/48v) no parallel connection or plug and play dc dc vin gnd +vo 0v cin vin gnd +vo 0v cin dc dc -vo single output ( figure 1 ) i n p u t c u r r e n t ( a ) input voltage (v) input voltage range ip ( figure 2 ) output external capacitor table(table 1) single vout (vdc) cout ( f) dual vout (vdc) cout ( f) 5 1000 5 680 12 470 12 330 15 330 15 220
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. wra_lt_3w & wrb_lt_3w b/4-2012 page 3 of 3 outline dimensions & pin connections 8.40[0.331] 1 5 . 1 0 [ 0 . 5 9 4 ] 1 0 . 1 0 [ 0 . 3 9 8 ] 22.60[0.890] 1 7 8 9 10 16 gnd nc nc +vo 0v vin 8 . 0 0 [ 0 . 3 1 5 ] 7 . 5 0 [ 0 . 2 9 5 ] 1 7 8 1 6 . 9 2 [ 0 . 6 6 6 ] 2 . 5 0 [ 0 . 0 9 8 ] 0 . 2 0 0 . 0 0 8 1.20 [0.047] 0.20 0.008 1 7 8 9 1 3 . 7 0 [ 0 . 5 3 9 ] 0 . 2 0 0 . 0 0 8 23.86 [0.939] 0.50 0.020 2.54 [0.100] 16 109 16 10 9 10 16 17.78 [0.700] 0.35 0.014 0.50 [0.020] 0.10 0.004 0 . 5 0 [ 0 . 0 2 0 ] 0 . 2 0 0 . 0 0 8 max3.34 [0.135] a 18.10 [0.713] 0.40 0.016 1.34 [0.053] 0.20 0.008 2.20 [0.087] 0.20 0.008 0 . 2 5 ] [ 0 . 0 1 0 0 . 1 0 0 . 0 0 4 a 0 ~ 5 17.78 [0.700] 0.10 [0.004] gnd nc 0v +vo -vo vin pin single dual footprint details note: unit:mm[inch] pin section tolerances: 0.10mm[ 0.004inch] general tolerances: 0.25mm[ 0.010inch] mechanical dimensions recommended footprint tube dutline dimensions note: unit :mm[inch] general tolerances: 0.50mm[ 0.020inch] l=530mm[20.866inch] tube quantity: 21pcs l=220mm[8.661inch] tube quantity: 8pcs (top view) nc: no connection short tube inner package dimensions: l*w*h= 255*170*80mm short tube outer package dimensions(with six inner package boxes): l*w*h= 375*280*270mm long tube inner package dimensions: l*w*h= 580*200*100mm long tube outer package dimensions(with two inner package boxes): l*w*h= 600*215*220mm long tube outer package dimensions(with three inner package boxes): l*w*h= 600*215*325mm note: grid 2.54*2.54mm. (front view) (side view) 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. capacitor max load tested at input voltage range and full load. 4. all specifications measured at ta=25 c, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 5. only typical models listed, other models may be different, please contact our technical person for more details. 6. in this datasheet, all the test methods of indications are based on corporate standards.
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