the copyright and authority for the interpretation of the products are reserved by mornsun vrb_ld-50w 3013.05.21-a/2 page 1 of 7 vrb_ld-50w series 50w,wide input,isolated & regulated single output dip packaging, dc-dcconverter patent protected rohs part number system vrb2405ld-50w ratedpower ackage p outputvoltage inputvoltage productseries product features efficiency up to 93% ultra wide input range(2:1) high and low temperature characteristics output short circuit protection input over- under voltage protection output over current protection output over voltage protection 1.5kvdc isolation operating temperature range: -40~+85 six-sided metal shield industry standard pinout industrial level specifications good emc performance inverse polarity protection for a2s chassis mounting and a4s din-rail mounting application vrb_ld-50w series offer 50w of output, 18-36vdc, 36-75vdc, single output, and features 1500vdc isolation, six-sided metal shield, under over current and short circuit protection. all models are particularly suited to tele-communications, industrial, test equipments power etc. selection guide input voltage(vdc) output current (ma) input current (ma)(typ.) model nominal(range) output voltage (vdc) max. min. @max. load @no load reflected ripple current (ma,typ.) max. capacitor load ( f) efficiency (%, typ.) @max. load vrb2403ld-50w 3.3 10000 500 1511 50 27000 91 vrb2405ld-50w 5 10000 500 2240 70 18900 93 vrb2412ld-50w 12 4167 208 2240 85 3700 93 vrb2415ld-50w 15 3333 167 2240 85 2000 93 VRB2424LD-50W 24 (18-36) 24 2083 104 2240 85 40 1000 93 vrb4803ld-50w 3.3 10000 500 756 35 27000 91 vrb4805ld-50w 5 10000 500 1120 45 18900 93 vrb4812ld-50w 12 4167 208 1120 50 3700 93 vrb4815ld-50w 15 3333 167 1120 50 2000 93 vrb4824ld-50w 48 (36-75) 24 2083 104 1120 50 30 1000 93 note: series with suffix h are heat sink mounting, series with suffix "a2s" are chassis mounting, with suffix "a4s" are din-rail mounting, for example vrb2405ld-50wha2s is chassis mounting with heat sink, vrb2405ld-50wa4s is din-rail mounting without heat sink. if the application has a higher requirement for heat dissipation, you can choose modules with heat sink. the efficiency of "a2s" and "a4s" is approx. 2% lower for the protection of inverse polarity. input specifications item test conditions min. typ. max. unit 24vdc input -0.7 -- 50 input surge voltage(1sec. max.) 48vdc input -0.7 -- 100 24vdc input -- -- 18 start-up voltage 48vdc input -- -- 36 24vdc input 16 -- -- input under voltage protection under voltage shutdown 48vdc input 32 -- -- vdc
the copyright and authority for the interpretation of the products are reserved by mornsun vrb_ld-50w 3013.05.21-a/2 page 2 of 7 24vdc input -- -- 36 start-up voltage 48vdc input -- -- 75 24vdc input 40 -- -- input over voltage protection over voltage shutdown 48vdc input 81 -- -- vdc start-up time nominal input& constant resistance load -- 10 -- ms models on ctrl open or connect ttl high level(3-12vdc) models off ctrl connect gnd or low level(0-1.2vdc) ctrl * input current (models off) -- 6 -- ma input filter pi filter note: *the ctrl pin voltage is referenced to gnd. output specifications item test conditions min. typ. max. unit output voltage accuracy -- 1 3 line regulation full load, input voltage from low to high -- 0.2 0.5 load regulation 5% to 100% load -- 0.5 1 % transient recovery time -- 300 500 us transient response deviation 25% load step change,0.1a/us,0.5ms -- 3 5 % temperature drift coefficient 100% load -- 0.02 -- %/ c ripple & noise* 20mhz bandwidth -- 50 120 mv p-p trim -- 10% -- 3.3v output -- 3.9 -- 5v output -- 6.2 -- 12v output -- 15 -- output over voltage protection 15v output -- 18 -- vdc output over current protection -- 150 -- % over temperature protection -- 110 -- c output short circuit protection input voltage range continuous, automatic recovery note:* ripple and noise tested with "parallel cable" method. see detailed operation instructions at dc-dc application notes . common specifications item test conditions min. typ. max. unit isolation voltage input-output, tested for 1 minute , leakage current less than 1 ma 1500 -- -- vdc isolation resistance input-output, test at 500vdc 1000 -- -- m isolation capacitance input-output, 100khz/0.1v -- 1000 -- pf switching frequency pwm mode -- 320 -- khz mtbf mil-hdbk-217f@25 1000 -- -- k hours case material aluminum alloy pcb mounting without heat sink 50.8 25.4 11.8 pcb mounting with heat sink 50.8 25.4 16.3 a2s chassis mounting without heat sink 76.0 31.5 21.2 a2s chassis mounting with heat sink 76.0 31.5 25.7 a4s din-rail mounting without heat sink 76.0 31.5 25.8 size a4s din-rail mounting with heat sink 76.0 31.5 30.3 mm pcb mounting without heat sink -- 35 -- pcb mounting with heat sink -- 43 -- a2s chassis mounting without heat sink -- 57 -- a2s chassis mounting with heat sink -- 65 -- a4s din-rail mounting without heat sink -- 77 -- weight a4s din-rail mounting with heat sink -- 85 -- g
the copyright and authority for the interpretation of the products are reserved by mornsun vrb_ld-50w 3013.05.21-a/2 page 3 of 7 environmental specifications item test conditions min. typ. max. unit storage humidity non condensing 5 -- 95 % operating temperature -40 -- 85 storage temperature -55 -- 125 the max. case temperature operating temperature curve range -- -- 105 lead temperature 1.5mm from case for 10 seconds -- -- 300 c cooling free air convection vibrating 10-55hz, 10g, 30 min. along x, y and z emc specifications ce cispr22/en55022 class b external circuit refer to figure1 or figure 3 emi re cispr22/en55022 class b external circuit refer to figure1 or figure 3 esd iec/en61000-4-2 contact 4kv perf. criteria b rs iec/en61000-4-3 10v/m perf. criteria a iec/en61000-4-4 2kv recommended circuit refer to figure 1 perf. criteria b eft iec/en61000-4-4 4kv recommended circuit refer to figure 3 perf. criteria b iec/en61000-4-5 2kv recommended circuit refer to figure 1 perf. criteria b surge iec/en61000-4-5 2kv/ 4kv recommended circuit refer to figure 3 perf. criteria b cs iec/en61000-4-6 3 vr.m.s perf. criteria a ems voltage dips, short and interruptions immunity iec/en61000-4-29 0%-70% perf. criteria b emc recommended circuit vin gnd +vo 0v eut load lcm c0 cy vin gnd cy 2 1 (figure 1) note: the external recommended circuit of ems test section of figure 1 can be used for transient pulse protection and emi filtering. choose according to requirements. recommended external circuit parameters: model vrb24xxld-50w vrb48xxld-50w c0 330 f/50v 330 f/100v lcm 2.2mh(fl2d-30-222) 2.2mh(fl2d-30-222) cy1,cy2 1nf/2kv 1nf/2kv emc recommended circuit pcb layout (figure 2) emc module application circuit +vin -vin emc filter dc-dc converter +vo 0v +vo -vo fuse + c1 (figure 3) note: emc filter fc-d03d is applied to input voltage for ranging 18-36vdc.fc-e03d is applied to input voltage for ranging 36-75vdc . c1: the capacitor c1 can enhance the voltage dips, short and interruptions immunity.
the copyright and authority for the interpretation of the products are reserved by mornsun vrb_ld-50w 3013.05.21-a/2 page 4 of 7 emc module recommended circuit pcb layout (figure 4) emi test waveform (recommended circuit fingure 1) vrb-ld-50w ce (class b, positive line) vrb-ld-50w ce (class b, negative line) vrb-ld-50w re(class b, horizontal) vrb-ld-50w re(class b, vertical) product typical curve temperature derating graph output voltage 5v output voltage >5v 0 20 40 60 80 100 120 -40 0 40 85 120 55 65 operating temp( c) o u t p u t p o w e r p e r c e n t ( % ) withoutheatsink with heatsink safe operating area 0 20 40 60 80 100 120 -40 0 40 85 120 60 70 operating temp( c) o u t p u t p o w e r p e r c e n t ( % ) withoutheatsink with heatsink safe operating area (figure 5) efficiency vs input voltage curve (full load) 50 55 60 65 70 75 80 85 90 95 100 18202224262830323436 input voltage(v) efficiency(%) vrb2405ld-50w efficiency vs output load curve (vin=vin-nominal) 0 10 20 30 40 50 60 70 80 90 100 5102030405060708090100 total output current (%) efficiency(%) vrb2405ld-50w
the copyright and authority for the interpretation of the products are reserved by mornsun vrb_ld-50w 3013.05.21-a/2 page 5 of 7 urb_ymd-20w pcb mounting outline dimensions,recommended footprint without heat sink vrb-ld-50whr2 pcb mounting outline dimensions(with heat sink) vrb_ld-50wa2s chassis mounting outline dimensions footprint details pin 1 2 3 4 5 6 function ctrl gnd vin trim 0v +vo
the copyright and authority for the interpretation of the products are reserved by mornsun vrb_ld-50w 3013.05.21-a/2 page 6 of 7 vrb_ld-50wa4s din-rail mounting outline dimensions din-rail modules are fitting to ts35 rails footprint details pin 1 2 3 4 5 6 function ctrl gnd vin trim 0v +vo package diagram pcb mounting series without heat sink pcb mounting series with heat sink special package series a2s/a4s test configurations input reflected-ripple current test setup input reflected-ripple current is measured with an inductor lin and capacitor cin to simulate source impedance. dc cin lin dc load oscilloscope current probe lin(4.7 h) cin(220 f, esr < 1.0 at 100 khz) trim application & trim resistance 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
the copyright and authority for the interpretation of the products are reserved by mornsun vrb_ld-50w 3013.05.21-a/2 page 7 of 7 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 above table 1. r t : resistance of trim a: user-defined parameter, no actual meanings. vo : the trim up/down voltage. (table 1) vo parameter 3.3(vdc) 5(vdc) 12(vdc) 15(vdc) 24(vdc) r1(k ) 4.788 2.87 11 15 20 r2(k ) 2.87 2.87 2.87 3 2.308 r3(k ) 15 12.1 22 22 15 vref(v) 1.24 2.5 2.5 2.5 2.5 design considerations recommended circuit all the vrb_ld-50w series have been tested according to the follo wing recommended testing circuit before leaving factory. this series should be tested under load. never be tested under no load (see figure 6). if you want to further decrease the input surge voltage and the output ripple, you can increase a capacitance pr operly or choose capacitors with low esr .it should also be noted that the capacitance of 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 recommended capacitance of its filter capacitor sees (table 2). dc dc vin gnd +vout 0v cin (figure 6) external capacitor table (table 2) capacitance output voltage cout( f) cin( f) 3.3v,5v 220 12v,15v 100 24v 47 100 it is not recommended to increase the output power capability by connecting two or more converters in parallel. the product is not hot-swappable. note: 1. min. load shouldn't be less than 5%, otherwise ripple maybe increased dramatically, if the product operates under min. load, it may not be guaranteed to meet all specifications listed. operation under minimum load will not damage the converter. 2. recommended dual output models unbalanced load is ? 5%, if the product operates > 5%, it may not be guaranteed to meet all specifications listed. please contact our technical support for more details. 3. max. capacitive load is 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. in this datasheet, all test methods are based on our corporate standards. 6. all characteristics are for listed models, and non-standard models may perform differently. please contact our technical support for more details. 7. please contact our technical support for any specific requirement. 8. specifications of this product are subject to changes without prior notice. 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
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