the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. urb_ld-20w 2013.06.13-a/4 page 1 of 3 urb_ld-20w series 20w, ultra wide input , isolated & regulated single output dc-dc converter rohs features product program input output voltage (vdc) model nominal range max (1) voltage (vdc) rated current (2) (ma) efficiency (typ, %) capacitor load max (3) ( f) urb2403ld-20w 3.3 5000 83 18700 URB2405LD-20W 5 4000 86 9600 urb2412ld-20w 12 1667 87 1600 urb2415ld-20w 15 1333 88 1000 urb2424ld-20w 24 9-36 40 24 834 88 500 urb4803ld-20w 3.3 5000 83 18700 urb4805ld-20w 5 4000 87 9600 urb4812ld-20w 12 1667 88 1600 urb4815ld-20w 15 1333 88 1000 urb4824ld-20w 48 18-75 80 24 834 88 500 add suffix h for heatsink mounted, for example URB2405LD-20Wh. common specifications item test conditions min. typ. max. units storage humidity 5 -- 95 % operating temperature -40 -- 85 storage temperature -55 -- 125 maximum case temp. on working temperature -- -- 105 lead temperature 1.5mm from case for 10 seconds -- -- 300 c isolation voltage test for 1 minute and 1 ma max 1500 -- -- vdc isolation resistance test at 500vdc 1000 -- -- m isolation capacitance 100khz/0.1v -- 1000 -- pf switching frequency nominal input, 100% load -- 400 -- khz mtbf mil-hdbk-217f 1000 -- -- k hours weight -- 28 -- g cooling free air convection case material aluminum alloy input specifications item test conditions min. typ. max. units models on -- -- 9.0 nominal input (24v) models off 8.0 -- -- models on -- -- 17.8 under voltage lockout nominal input (48v) models off 16.0 -- -- vdc input filter pi start-up time -- 10 -- ms models on 3.5 -12vdc or open circuit models off 0-1.2vdc ctrl (4) input current (models off) -- -- 1 ma 4:1 ultra wide input voltage range 1.5kvdc input/output isolation short circuit protection (automatic recovery) operating temperature: -40 c ~ +85 c internal smd construction metal shielding package industry standard pinout mtbf>1,000,000 hours rohs compliance application the urb_ld-20w series offer 20w of output, with 4:1 ultra wide input voltage of 9-36vdc, 18-75vdc, and features 1500vdc isolation, over current, over voltage and short-circuit protection, as well as six sided metal shielding. all models are particularly suited to industrial, tele-communications, test equipments power. model selection URB2405LD-20W 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 e-mail: info@mornsun.cn 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. urb_ld-20w 2013.06.13-a/4 page 2 of 3 output specifications recommended circuit item test conditions min. typ. max. units output power see product program 2 -- 20 w output voltage accuracy refer to recommended circuit -- 1 3 load regulation from 10% to 100% load -- 0.5 1 line regulation input voltage from low to high 100% load -- 0.2 0.5 % ripple and noise 20mhz bandwidth 55 75 150 mv transient recovery time -- 200 500 us transient peak deviation 25% load step change -- 3 5 % over current protection input voltage range 120 130 150 % short circuit protection input voltage range hiccup, automatic recovery 3.3v output -- 3.9 -- 5v output -- 6.2 -- 12v output -- 15 -- over voltage protection 15v output -- 18 -- vdc temperature drift (vout) refer to recommended circuit -- 0.02 -- %/ c trim -- 10%v o -- vdc 1 ) recommended circuit all the urb_ld-20w s eries have been tested according to the following recommended testing circuit before leaving factory. this series should be tested under load. never be tested under no load (see figure 1). dc dc vin gnd +vo 0v cin cout (figure 1) if you want to further decrease the output ripple, you can increase capacitance properly or choose capacitors with low esr. however, the capacitance can t exceed the maximum capacitor load in the list. 2) recommended capacitance capacitance output voltage cout( f) cin( f) (24v,48v input) 3.3(vdc) 470 5(vdc) 470 12(vdc) 220 15(vdc) 220 24(vdc) 100 100 3) no parallel connection or plug and play trim application & trim resistance derating & efficiency curve application circuit for trim (part in broken line is the interior of models) 0v r 2 r 1 r 3 v ref r t trim +vo 0v r 2 r 1 r 3 v ref r t trim +vo trim up trim down formula for resistance of trim up: a= vref vo -vref r 1 r= t ar 2 r-a 2 -r 3 down: a= vref vo -vref r 2 r= t ar 1 r-a 1 -r 3 note: value for r1, r2, r3, and vref refer to the following table. r t : resistance of trim a: user-defined parameter, no actual meanings. vo : the trim up/down voltage vo resistance 3.3 (vdc) 5 (vdc) 12 (vdc) 15 (vdc) 24 (vdc) r1(k ) 4.80 2.88 10.97 14.50 24.87 r2(k ) 2.86 2.86 2.86 2.86 2.86 r3(k ) 15 10 17.8 17.8 20 vref(v) 1.24 2.5 2.5 2.5 2.5 1) temperature derating curve (output voltage 5v) operating temp( ) c o u t p u t p o w e r ( % ) (output voltage > 5v) operating temp( ) c o u t p u t p o w e r ( % ) 2) efficiency vs input voltage URB2405LD-20W 70 72 74 76 78 80 82 84 86 88 90 9 121518212427303336 input voltage(v) efficiency(%) 3) efficiency vs output load URB2405LD-20W 0 10 20 30 40 50 60 70 80 90 102030405060708090 100 output load %io efficiency(%)
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. urb_ld-20w 2013.05.31-a/4 page 3 of 3 outline dimensions & footprint details heatsink assembly& package diagram(with heatsink) notes 1. input voltage can t exceed this value, or will cause the permanent damage. 2. minimum operating current is 10% of rated current, if less than 10% rated current, output ripple may increase rapidly, the amplitude 1v. 3. capacitor max load tested at nominal input voltage and constant resistive load. 4. the ctrl control pin voltage is referenced to gnd. 5. only typical model listed. non-standard models will be different from the above, please contact us for more details. 6. all specifications are measured at ta=25 c, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 7. in this datasheet, all the test methods of indications are based on corporate standards.
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