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 24 vdc input 8 vdc / 5 a output 1/16 brick ? 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) description the xrsb-50r08x series are isolated dc/dc converters that operate from a nominal 24 vdc source. these units will provide up to 40 w of output power from a nominal 24 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 8 v 18 v - 36 v 5 a 40 w 90% xrsb-50r08l xrsb-50r080 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 - 40 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 input specifications parameter min typ max notes input voltage 18 v 24 v 36 v input current (full load) - - 3.5 a input current (no load) - 80 ma 160 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 in p ut. i 2 t inrush current transient - 0.01 a 2 s0.02 a 2 s turn on voltage threshold - 17 v - turn off voltage threshold - 16 v - note: all specifications are typical at nominal input, full load at 25 c unless otherwise stated. xrsb-50r08x rohs com p liant rev.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 24 vdc input 8 vdc / 5 a output 1/16 brick output specifications parameter min typ max notes output voltage set point 7.88 v 8 v 8.12 v vin=24 v; io=50% load line regulation - 5 mv 10 mv load regulation - 5 mv 10 mv regulation over temperature(-40 c to +85 c) - 20 mv 35 mv output current 0 a - 5 a current limit threshold 6 a 7.5 a 9 a short circuit surge transient - 0.5 a 2 s 1 a 2 s ripple and noise (rms) - 10 mv 20 mv ripple and noise (pk-pk) - 40 mv 75 mv tested at 0-20 mhz bw, with a 1 uf ceramic capacitor and a 10 uf tantalum capacitor at the output. turn on time - 24 ms 50 ms overshoot at turn on - 0% 5% output capacitance 100 uf - 680 uf transient response overshoot - 150 mv 250 mv 25% ~ 50% max load settling time - 120 us 250 us overshoot - 150 mv 250 mv 50% ~ 25% max load settling time vo=8 v - 120 us 250 us test conditions: di/dt = 0.1 a/us, vin=24 v, with a 1 uf ceramic capacitor and a 10 uf tantalum capacitor at the output. note: all specifications are typical at nominal input, full load at 25 c unless otherwise stated. general specifications parameter min typ max notes efficiency 87% 90% - vin=24 v; io=io, max; full load switching frequency 540 khz 600 khz 660 khz isolation capacitance - 3900 pf - output voltage trim range 90% vo - 110% vo over temperature protection 120 c - 140 c over voltage protection - 130% vo 140% vo test conditions: vin=24 v, full load and short the feedback optocoupler. mtbf tbd calculated per bell core sr-332 (i o = nominal; t a = 25 c) dimensions inches (l w h) millimeters (l w h) 1.3 x 0.9 x 0.334 33.0 x 22.9 x 8.49 smt package dimensions inches (l w h) millimeters (l w h) 1.3 x 0.9 x 0.378 33.0 x 22.9 x 9.60 through hole package weight - 13 g - 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 isolated dc/dc converters 24 vdc input 8 vdc / 5 a output 1/16 brick 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 output trim equations equations for calculating the trim resistor are shown below. 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] output voltage vo=8.003 v module vout trim gnd rtrimdown module vout trim gnd rtri mup [] ? = k delta rtrimdown 22 . 10 511 [] ? ? ? ? ? + = k delta vo delta rtrimup 22 . 10 225 . 1 626 11 . 5 ) 100 ( () [] % 100 _ ? = vo vo req vo delta
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 24 vdc input 8 vdc / 5 a output 1/16 brick efficiency data 50% 55% 60% 65% 70% 75% 80% 85% 90% 0.5a 1.25a 2.5a 3.75a 5a output current (a) efficiency 18v 24v 36v thermal derating curve
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 24 vdc input 8 vdc / 5 a output 1/16 brick ripple and noise waveform 24 vdc input, 1.2 v output note: ripple and noise at full load, with a 1uf ceramic cap and a 100 uf tantalum cap at output, ta=25 deg c. transient response waveforms vout=8.0 v 50% to 25% load transients vout=8.0 v 25% to 50% load transients note: transient response at vin=48 v, di/dt=0.1a/us, external 100 uf tantalum cap and 1uf ceramic cap, 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 isolated dc/dc converters 24 vdc input 8 vdc / 5 a output 1/16 brick 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 (+)
? 2007 bel fuse inc. specifications subject to change without notice. 012907 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 24 vdc input 8 vdc / 5 a output 1/16 brick through hole package rohs compliance complies with the european directive 2002/95/ec , calling for the elimination of lead and other hazardous substances from electronic products. pin connections pin function 1 vin (+) 2 remote on/off 3 vin (-) 4 vout- 5 remote sense (-) 6 trim 7 remote sense (+) 8 vout (+)
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