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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 isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. ? isolated ? input under voltage lockout ? fixed frequency (600 khz) ? output over voltage shutdown ? high efficiency ? ocp/scp ? high power density ? over temperature protection ? low cost ? remote on/off (option) ? output voltage trim ? positive/negative remote sense ? basic insulation ? through hole and smt (option) ? ul60950-1 recognized (ul/cul) description the XRSB-50T series are isolated dc/dc converters that operate from a nominal 48 vdc source. these units will provide up to 60 w of output power from a nominal 48 vdc input. these units are designed to be highly efficient and low cost. features include remote on/off, over current protection and under voltage lockout. these converters are provided in an industry standard sixteenth brick package. part selection output voltage input voltage max. output current max. output power typical efficiency model number active low model number active high 1.5 v 36 v - 75 v 22 a 33 w 85% XRSB-50Tv5l XRSB-50Tv50 1.8 v 36 v - 75 v 20 a 36 w 87% XRSB-50Tv8l XRSB-50Tv80 2.5 v 36 v - 75 v 18 a 45 w 87% XRSB-50T02l XRSB-50T025 3.3 v 36 v - 75 v 15 a 50 w 89% XRSB-50T03l XRSB-50T033 5.0 v 36 v - 75 v 12 a 60 w 90% XRSB-50T05l XRSB-50T050 12 v 36 v - 75 v 5 a 60 w 89% XRSB-50T12l XRSB-50T120 notes: 1. add ?g? suffix at the end of the model number to indicate tray packaging. replace?x? with ?s? to indicate smt package, or ?0? to indicate through hole package. 2. all part numbers above indicate rohs 6. change the second letter "r" to "7" for rohs 5 part numbers. absolute maximum ratings parameter min typ max notes input voltage (continuous) -0.3 v - 80 v input voltage transient (100 ms) -0.3 v 100 v remote on/off -0.3 v - 18 v i/o isolation voltage - - 1500 v ambient temperature -40 c - 85 c storage temperature -55 c - 125 c XRSB-50T series rohs com p liant rev.f
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. input specifications parameter min typ max notes input voltage 36 v 48 v 75 v input current (full load) - - 2.4 a input current (no load) - 70 ma 120 ma remote off input current - 1 ma 3 ma input reflected ripple current (pk-pk) - 20 ma 50 ma input reflected ripple current (rms) - 3 ma 7 ma tested with simulated source impedance of 15 uh, 5 hz to 20 mhz; use a 100 uf/100 v electrolytic capacitor with esr=1 ohm max at 200 khz at the input. i 2 t inrush current transient - 0.01 a 2 s0.02 a 2 s turn on voltage threshold 31 v 32 v 35 v turn off voltage threshold 30 v 31 v 34 v note: all specifications are typical at nominal input, full load at 25 c unless otherwise stated. output specifications parameter min typ max notes output voltage set point vo=1.5 v vo=1.8 v vo=2.5 v vo=3.3 v vo=5.0 v vo=12 v 1.478 v 1.773 v 2.463 v 3.250 v 4.925 v 11.750 v 1.5 v 1.8 v 2.5 v 3.3 v 5.0 v 12.0 v 1.523 v 1.827 v 2.538 v 3.350 v 5.075 v 12.250 v test conditions: vin=48 v; io=50% load line regulation vo=1.5 - 1.8 v vo=2.5 v vo=3.3 v vo=5.0 v vo=12 v - - - - - 0.5 mv 1 mv 3 mv 4 mv 10 mv 3 mv 6 mv 8 mv 9 mv 25 mv load regulation vo=1.5 - 2.5 v vo=3.3 - 5.0 v vo=12 v - - - 3 mv 4 mv 9 mv 5 mv 9 mv 18 mv regulation over temperature(-40 c to +85 c) vo=1.5 - 1.8 v vo=2.5 - 3.3 v vo=5.0 v vo=12 v - - - - 6 mv 9 mv 15 mv 20 mv 14 mv 16 mv 30 mv 35 mv output current vo=1.5 v vo=1.8 v vo=2.5 v vo=3.3 v vo=5.0 v vo=12 v 0 a 0 a 0 a 0 a 0 a 0 a - - - - - - 22 a 20 a 18 a 15 a 12 a 5 a
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. output specifications (continued) parameter min typ max notes current limit threshold vo=1.5 v vo=1.8 v vo=2.5 v vo=3.3 v vo=5.0 v vo=12 v 28 a 24 a 22 a 19 a 14 a 5.2 a 34 a 28 a 26 a 22 a 19 a 6.5 a 40 a 34 a 30 a 26 a 24 a 8.5 a short circuit surge transient - 0.5 a 2 s 1 a 2 s ripple and noise (rms) vo=1.5 - 1.8 v vo=2.5 v vo=3.3 v vo=5.0 v vo=12 v - - - - - 6 mv 10 mv 12 mv 25 mv 30 mv 12 mv 20 mv 25 mv 50 mv 55 mv ripple and noise (pk-pk) vo=1.5 - 1.8 v vo=2.5 v vo=3.3 v vo=5.0 v vo=12 v - - - - - 40 mv 45 mv 55 mv 70 mv 90 mv 70 mv 80 mv 90 mv 120 mv 180 mv tested at 0-20 mhz bw, with a 1 uf ceramic capacitor and a tantalum capacitor (refer to the min. output capacitance below for each output) at the output. turn on time - 35 ms 70 ms overshoot at turn on - 0% 5% output capacitance vo=1.5 v vo=1.8 - 2.5 v vo=3.3 v vo=5.0 v vo=12 v 470 uf 470 uf 220 uf 100 uf 22 uf - - - - - 15000 uf 10000 uf 5600 uf 4700 uf 470 uf recommend to use avx tps series tantalum capacitor as the min capacitor transient response overshoot - 110 mv 150 mv 25% ~ 50% max load settling time - 110 us 180 us overshoot - 110 mv 150 mv 50% ~ 25% max load settling time vo=1.5 - 1.8 v - 110 us 180 us overshoot - 150 mv 250 mv 25% ~ 50% max load settling time - 120 us 200 us overshoot - 150 mv 250 mv 50% ~ 25% max load settling time vo=2.5 - 3.3 v - 120 us 200 us overshoot - 220 mv 350 mv 25% ~ 50% max load settling time - 120 us 250 us overshoot - 220 mv 350 mv 50% ~ 25% max load settling time vo=5.0 v - 120 us 250 us overshoot - 400 mv 650 mv 25% ~ 50% max load settling time - 150 us 300 us overshoot - 400 mv 650 mv 50% ~ 25% max load settling time vo=12 v - 150 us 300 us test conditions: di/dt = 0.1 a/us, vin=48 v, with a 1uf ceramic capacitor and a tantalum capacitor (refer to the min. output capacitance above for each output) at the output. note: all specifications are typical at nominal input, full load 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 isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. general specifications parameter min typ max notes efficiency vo=1.5 v vo=1.8 - 2.5 v vo=3.3 v vo=5.0 v vo=12 v 82% 84% 86% 87% 86% 85% 87% 89% 90% 89% - - - - - vin=48 v, full load switching frequency 540 khz 600 khz 660 khz isolation capacitance - 3900 pf - output voltage trim range vo=1.5 - 5.0 v vo=12 v 90% vo 80% vo - - 110% vo 110% vo over temperature protection 120 c - 140 c over voltage protection - 130% vo 160% vo test conditions: vin=48 v, full load and short the feedback optocoupler. mtbf 2,770,832 hours calculated per bell core sr-332 (i o =80% load, vin=48 v, vo=5 v; t a = 25 c) dimensions inches (l w h) millimeters (l w h) 1.3 x 0.9 x 0.364 33.02 x 22.86 x 9.24 smt package dimensions inches (l w h) millimeters (l w h) 1.3 x 0.9 x 0.388 33.02 x 22.86 x 9.85 through hole package weight - 13 g - note : all specifications are typical at 25 c unless otherwise stated. control specifications parameter min typ max notes remote on/off signal low (unit on) -0.3 v - 0.8 v signal high (unit off) active low 2.95 v - 18 v signal low (unit off) -0.3 v - 0.8 v signal high (unit on) active high 2.95 v - 18 v when remote on/off pin is open, for active low option, unit is off; for active high option, unit is on current sink - 0 ma - 1 ma
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. output trim equations equations for calculating the trim resistor are shown below (unit: k ? ). the trim down resistor should be connected between the trim pin and ground pin. the trim up resistor should be connected between the trim pin and the vout. only one of the resistors should be used for any given application. note : vo_req=desired (trimmed) output voltage [v] vo=1.503 v for 1.5 v output; vo=1.804 v for 1.8 v output; vo=2.505 v for 2.5 v output; vo=3.308 v for 3.3 v output; vo=5.002 v for 5 v output; vo=12.007 v for 12 v output. efficiency data 50% 55% 60% 65% 70% 75% 80% 85% 90% 2.2a 5.5a 11a 16a 22a output current (a) efficiency 36 v 48 v 75 v 50% 55% 60% 65% 70% 75% 80% 85% 90% 2a 5a 10a 15a 20a output current (a) efficiency 36v 48v 75v vo=1.5 v vo=1.8 v 22 . 10 511 ? = delta r trimdown () [] % 100 _ ? = vo vo req vo delta 22 . 10 225 . 1 626 11 . 5 ) 100 ( ? ? ? ? ? + = delta vo delta r trimup module vout trim gnd rtrimdown module vout trim gnd rtrimup
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. efficiency data (continued) 50% 55% 60% 65% 70% 75% 80% 85% 90% 1.8a 4.5a 9a 12.a 18a output current (a) efficiency 36v 48v 75v 50% 55% 60% 65% 70% 75% 80% 85% 90% 1.5a 3.75a 7.5a 11.25a 15a output current (a) efficiency 36v 48v 75 v vo=2.5 v vo=3.3 v 50% 55% 60% 65% 70% 75% 80% 85% 90% 1.2a 3a 6a 9a 12a output current (a) efficiency 36 v 48 v 75 v 50% 55% 60% 65% 70% 75% 80% 85% 90% 0.5a 1.25a 2.5a 3.75a 5a output current (a) efficiency 36 v 48 v 75 v vo=5.0 v vo=12 v thermal derating curves vin=48 v, vo=1.8 v vin=48 v, vo=2.5 v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. thermal derating curves (continued) vin=48 v, vo=3.3 v, vin=48 v, vo=5.0 v vin=48 v, vo=12 v ripple and noise waveforms vo=1.8 v vo=2.5 v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. ripple and noise waveforms (continued) vo=3.3 v vo=5.0 v vo=12 v note: ripple and noise at full load, 48 v input, ta=25 deg c. 1) for vo=1.8 v -2.5 v, with a 1 uf ceramic ca pacitor and a 470 uf tantalum cap at the output; 2) for vo=3.3 v, with a 1 uf ceramic capacit or and a 220 uf tantalum cap at the output; 3) for vo=5.0 v, with a 1 uf ceramic capacit or and a 100 uf tantalum cap at the output; 4) for vo=12 v, with a 1 uf ceramic capacitor and a 22 uf tantalum cap at the output.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. transient response waveforms vo=1.8 v 50% to 25% load transients vo=1.8 v 25% to 50% load transients vo=2.5 v 50% to 25% load transients vo=2.5 v 25% to 50% load transients vo=3.3 v 50% to 25% load transients vo=3.3 v 25% to 50% load transients
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. transient response waveforms (continued) vo=5 v 50% to 25% load transients vo=5 v 25% to 50% load transients vo=12 v 50% to 25% load transients vo=12 v 25% to 50% load transients note: transients response at vin=48 v, di/dt=0.1a/us, ta=25 deg c. 1) for vo=1.8 v -2.5 v, with a 1 uf ceramic ca pacitor and a 470 uf tantalum cap at the output; 2) for vo=3.3 v, with a 1 uf ceramic capacit or and a 220 uf tantalum cap at the output; 3) for vo=5.0 v, with a 1 uf ceramic capacit or and a 100 uf tantalum cap at the output; 4) for vo=12 v, with a 1 uf ceramic capacitor and a 22 uf tantalum cap at the output.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. mechanical outline smt package pin connections pin function 1 vin (+) 2 remote on/off 3 vin (-) 4 vout- 5 remote sense (-) 6 trim 7 remote sense (+) 8 vout (+)
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. mechanical outline (continued) through hole package note: 1) all pins: material - copper alloy; finish ? 3 micro inches minimum gold over 50 micro inches minimum nickel plate. 2) undimensioned components are shown for visual reference only. 3) all dimensions in inches; tolerances: x.xx +/-0.02 in. x.xxx +/-0.010 in. unless otherwise stated. pin connections pin function 1 vin (+) 2 remote on/off 3 vin (-) 4 vout- 5 remote sense (-) 6 trim 7 remote sense (+) 8 vout (+)
? 2010 bel fuse inc. specifications subject to change without notice. 041210 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.belfuse.com fax 852-2352-3706 fax 44-1772-888366 www.belfuse.com www.belfuse.com isolated dc/dc converters 48 vdc input 1.5 vdc - 12 vdc / 22 a - 5 a outputs, 1/16 brick apr. 12, 2010 bel power inc., a subsid iary of bel fuse inc. revision history date revision changes detail approval 2010-4-12 f update the 0rsb-50t series product height from 0.378?? to 0.388??. jack fan rohs compliance complies with the european directive 2002/95/ec , calling for the elimin ation of lead and other hazardous substances from electronic products.

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