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bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 1 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. features ? isolated ? output over voltage shutdown ? high efficiency ? output voltage trim ? high power de n sity ? ocp/scp ? fixed frequency ( 230 khz) ? over t emperature p rotection ? low cost ? remote on/off ? input under v oltage lockout ? remote on/off logic (optional) ? class 1, category 2, isolated dc/dc converter (refer to ipc - 9592) applications ? network ing ? computers and peripherals ? telecommunications description the 0 r lc - 25t s eries are isolated dc / dc converters that operate from a nominal 48 vdc source. these units will provide up to 30 w of output power. these units are designed to be hig h efficie nt and very low cost. features include remote on/off, over current protecti on, and under voltage lockout. these converters are provided in a n industry standard package. part selection output voltage input voltage max. output current max. output power ty pical efficiency model number active h i gh model number active l ow 3.3 vdc 36 v dc - 75 vdc 7 a 23 w 88% 0rlc - 25t033 0rlc - 25t03 l 5.0 vdc 36 v dc - 75 vdc 5 a 25 w 90% 0rlc - 25t050 0rlc - 25t05 l 12.0 vdc 36 v dc - 75 vdc 2.5 a 30 w 90% 0rlc - 25t120 0rlc - 25t12 l 15. 0 vdc 36 v dc - 75 vdc 2.0 a 30 w 90% 0rlc - 25t1 5 0 0rlc - 25t1 5l 24.0 vdc 36 v dc - 75 vdc 1.25 a 30 w 89 % 0rlc - 25t 240 0rlc - 25t 24l notes : add ?g? suffix at the end of the model number to indicate tray packaging. part number explanation 0 r lc ? 25 t xx x 1 2 3 4 5 6 7 1 --- through hole m ount 2 --- rohs 6, change ? r ? to ? 7 ? means rohs 5 3 --- series name 4 --- series code 5 --- i nput range ( 36 - 75 v) 6 --- output voltage 7 --- enable , ? 0 ? or ? 3 ? mean active high , and ? l ? means active low 0rlc - 25t series rohs compliant rev. b
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 2 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. absol ute maximum ratings parameter min typ max unit notes input voltage (continuous) - 0.3 - 80 v remote on/off - 0.3 - 12 v ambient temperature - 40 - 85 ? c storage temperature - 55 - 125 ? c note: ratings used beyond the maximum ratings may cause a reliab ility degradation of the converter or may permanently damage the device. input specifications parameter min typ max unit notes input voltage 36 - 75 v input current (full load) - - 1.1 a input current (no load) - 25 40 ma remote off input current - 3 10 ma input reflected ripple current ( rms) - 10 2 0 ma input reflected ripple current (pk - pk) - 40 60 ma with simulated source impedance of 10 uh, 5 hz to 20 mhz. and use a 100 uf/ 100 v electrolytic capacitor w ith esr=1 ohm max, at 200 k hz . i 2 t inrush current transient - 0. 1 0. 5 a 2 s turn - on voltage threshold 3 1 34 3 6 v turn - off voltage threshold 30 3 3 3 5 v note: all specificatio ns are typical at 25 ? c unless otherwise stated . output specifications parameter min typ max unit notes out put voltage set point v o =3.3 v v o =5 .0 v v o =12 .0 v v o =1 5.0 v v o = 24.0 v 3.2 34 4.90 0 11. 76 1 4 . 70 23 . 52 3.3 5.0 12.0 1 5 .0 24 .0 3. 366 5.1 00 12. 240 1 5 . 300 2 4 . 48 0 v v v v v test condition: v in =48 v, i o =50% load at the output. line regulation v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o = 24 .0 v - - - - - 1 2 5 8 1 0 3 5 10 15 20 mv mv mv mv mv load regulation v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o = 24 .0 v - - - - - 2 4 9 1 0 15 5 8 18 2 0 30 mv mv mv mv mv
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 3 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. output specifications (cont inued) parameter min typ max unit notes regulation over temperature ( - 40 ? c to +85 ? c) v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o = 24 .0 v - - - - - 30 40 100 1 2 0 150 50 70 170 20 0 240 mv mv mv mv mv total regulation v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o = 24 .0 v - - - - - 33 46 114 140 150 58 83 198 250 330 mv mv mv mv mv ripple and noise (pk - pk) v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o = 24 .0 v - - - - - 40 40 40 80 85 75 75 75 120 150 mv mv mv mv mv ripple and noise ( rms ) v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o = 24 .0 v - - - - - 10 10 10 1 5 2 0 20 20 20 30 4 0 mv mv mv mv mv test condition of the output ripple a nd noise: 0 - 20 mhz bw, with a 1 f ceramic capacitor and a 10 uf /35 v electrolytic capacitor at the output. output current range v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o = 24 .0 v 0 0 0 0 0 - - - - - 7.0 5.0 2.5 2.0 1.25 a a a a a output dc current limit v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o = 24 .0 v 7.7 5.5 3.0 2.2 1.5 - - - - - 12.0 8.0 4.2 3.4 2 .2 a a a a a shor t circuit surge transient - 0.5 1 a 2 s turn on time - 10 25 ms overshoot at turn on - 0 5 % output capacitance v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o = 24 .0 v 0 0 0 0 0 - - - - - 3300 2200 330 330 330 uf
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 4 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. output specifications (continued) parameter min typ max unit notes transient response overshoot - 75 100 mv 50% ~ 75% max load settling time - 150 2 00 us overshoot - 75 100 mv 25% ~ 50% max load settling time v o = 3.3 v - 150 200 us overshoot - 100 150 mv 50% ~ 75% max load settling time - 150 200 us overshoot - 100 150 mv 25% ~ 50% max load settling time v o = 5.0 v - 150 200 us overshoot - 150 200 mv 50% ~ 75% ma x load settling time - 150 200 us overshoot - 150 200 mv 25% ~ 50% max load settling time v o = 12.0 v - 150 2 00 us overshoot - 10 0 2 00 mv 50% ~ 75% max load settling time - 20 0 3 00 us o vershoot - 10 0 2 00 mv 25% ~ 50% max load settling time v o = 1 5.0 v - 20 0 3 00 us overshoot - 15 0 3 00 mv 50% ~ 75% max load settling time - 30 0 5 00 us overshoot - 15 0 3 00 mv 25% ~ 50% max load settling time v o = 24.0 v - 30 0 5 00 us test condition of the transient response: di/dt=0.1 a/us, vin=48 v , with a 220 uf/35 v electrolytic capacitor at the output. note : all specifications are typical at nominal input, full load at 25c unless otherwise stated . general specifications parameter min typ max unit notes efficiency v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o =2 4 .0 v 85 8 7 8 7 8 7 8 6 88 9 0 9 0 9 0 89 - - - - - % % % % % measured at v in =48 v, i o =io, max switching frequency 200 230 260 khz i/o isolation voltage 1500 - - v isolation capacitance - 1500 - pf output voltage trim range 90 - 110 % over temperature protection - 110 - ? c over voltage protection v o =3.3 v v o =5.0 v v o =12.0 v v o =1 5 .0 v v o =2 4 .0 v 3.9 0 5.7 0 13.6 0 17.25 27.60 - - - - - 5 .0 7 .0 14.2 22 . 5 36 . 0 v v v v v test condition of over voltage protection: vin=48 v, io=100% load at 25 ? c ambient. weight - 20 - g mtbf 2,602,427 hours calculated per bell core s r - 332 (i o = 80 % load ; vin=48 v ; vo=3.3 v , t a = 25 ? c) dimensions inches (l w h) millimeters (l w h) 2.0 x 1.0 x 0.438 50.8 x 25.4 x 11.14 - note : all specifications are typical at 25 ? c unless otherwise stated.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 5 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. remote on/off parameter min typ max unit not es signal low (unit o n ) - 0.3 - 0.8 v signal high (unit o ff ) active low 3.5 - 12 v the remote on/off pin open, unit o ff signal low (unit o ff ) - 0.3 - 0.8 v signal high (unit o n ) active high 3.5 - 12 v the remote on/off pin open, unit o n current si nk 0.3 - 0.75 ma output trim equations e q u a t i o n s f o r c a l c u l a t i n g t h e t r i m r e s i s t o r ( i n k ? ) g i v e n t h e d e s i r e d a d j u s t e d v o l t a g e ( v a d j ) a n d t h e n o m i n a l output voltage of the converter (vnom) are shown below. the trim down resistor should be connected between the trim pin and vout. the trim up resi stor should be connected between the trim pin and ground. only one of the resistors should be used for any given application. b v v a r adj nom down trim ? ? ? _ d v v c r nom adj up trim ? ? ? _ vnom a b c d 24.0 272.305 15.664 31.634 3.010 1 5.0 92.125 9.360 18.400 2.000 12 .0 53.320 9.260 14.025 3.650 5 .0 19.300 15.120 6.350 10.000 3.3 21.711 40.610 13.032 30.100 rtrim_down module vout gnd trim rtrim_up module vout gnd trim
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 6 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. efficiency data 50% 55% 60% 65% 70% 75% 80% 85% 90% 0.7a 1.75a 3.5a 5.25a 7a output current (a) e f f i c i e n c y 36v 48v 75v 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 0.5a 1.25a 2.5a 3.75a 5a output current (a) e f f i c i e n c y 36 48 75 0rlc - 25t033 0rlc - 25t 050 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 0.25a 0.625a 1.25a 1.875a 2.5a output current (a) e f f i c i e n c y 36 48 75 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 0.2a 0.5a 1.0a 1.5a 2.0a output current (a) e f f i c i e n c y 36 48 75 0rlc - 25t120 0rlc - 25t150 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 0.125a 0.3215a 0.625a 0.9375a 1.25a output current (a) e f f i c i e n c y 36 48 75 0rlc - 25t240
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 7 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. thermal derating curves 0rlc - 25t03 3 0rlc - 25t05 0 0rlc - 25t12 0 0rlc - 25t 150 0rlc - 25t 240
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 8 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. ripple and noise waveforms rip ple and noise at full load, 3.3 vdc/7 a output ripple and noise at full load, 5.0 vdc/5 a output ripple and noise at full load, 12 vdc/2.5 a output ripple and noise at full load, 15 vdc/2 a output ripple and noise at full load, 24 vdc/1.25 a output note: ripple and noise at 48 vdc input, with a 0.47 uf ceramic cap at the output, ta=25 deg c.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 9 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. transient response waveforms transients 25% to 50 % load 3.3 vdc output t ransients 50% to 75 % load 3.3 vdc output transients 25% to 50 % load 5.0 vdc output t ransients 50% to 75 % load 5.0 vdc output transients 25% to 50 % load 12 vdc output t ransients 50% to 75 % load 12 vdc output
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 10 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. transient response waveforms (continued) transients 25% to 50 % load 15 vdc output t ransients 50% to 75 % load 15 vdc output transients 25% to 50 % load 24 vdc output t ransients 50% to 75 % load 24 vdc output note: transient response at 48 vdc input, di/dt=0.1 a /us, with e xternal 220 uf electrolytic c ap and 0.47 uf cer amic cap at the output, and ta=25 deg c.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201 - 432 - 0463 ? fax 201 - 432 - 9542 ? www.belfuse.com 11 isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. mechanical outline note: this module is recommended and compatible with pb - free wave soldering and must be soldered using a peak solder temperature of no more than 26 0 oc for less th a n 5 seconds . note : 1 ) all pins: material - copper alloy ; finish ? 3 micro inches minimum gold over 50 m icro inches minimum nickel plate . 2 ) undimensioned components are shown for visual reference only. 3 ) all dimensions in inches (mm) ; tolerances: x.xx +/ - 0.02 in. (x.x +/ - 0.5mm) x.xxx +/ - 0.010 in. (x.xx +/ - 0.25mm) . pin connections pin function 1 v in + 2 v in - 3 cnt 4 v o + 5 v o - 6 trim
? 20 10 bel fuse inc. specifications subject to change without notice. 112 9 10 12 corporate far east europe bel fuse inc. bel fuse ltd. bel fuse europe ltd. 206 van vorst street 8f/ 8 luk hop street preston technology management centre jersey city, nj 07302 san po kong marsh lane, suite g7, preston tel 201 - 432 - 0463 kowloon, hong kong lancashire, pr1 8ud, u.k. fax 201 - 432 - 9542 tel 852 - 2328 - 5515 tel 44 - 1772 - 556601 www.belf use.com fax 852 - 2352 - 3706 fax 44 - 1772 - 888366 www.belfuse.com www.belfuse.com isolated dc/dc converters 48 vdc input 3.3 vdc - 24 vdc/7 a - 1.25 a o utput output converter nov. 2 9 , 20 10 bel power, inc. , a subsidiary of bel fuse, inc. revision history date revis ion changes detail approval 2007 - 03 - 02 a first release. xf jiang 2010 - 11 - 29 b update the notes in remote on/off. xf jiang . rohs com p liance complies with the european directive 2002/95/ec, calling for the elimination of lead and other hazardous substances from electronic products.

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