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 3.3 vdc /30 a output ? isolated ? high efficiency ? output voltage trim ? ocp/scp ? high power density ? over temperature protection ? fixed frequency (300 khz) ? low cost ? remote on/off ? positive/negative remote sense ? input under-voltage lockout ? output over-voltage protection ? basic insulation description the 0rcy-c2t03x is isolated dc/dc conv erter that operates from a nominal 48 vdc source. this unit will provide up to 99 w of output power from a nominal 48 vdc input. this unit is designed to be highly efficient and low cost. features include remote on/off, over current protection and under-voltage lockout. this converter is provided in an industry standard eighth brick package. part selection output voltage input voltage max. output current max. output power typical efficiency model number active high model number active low 3.3 vdc 48 vdc 30 a 99 w 93% 0rcy-c2t030 0RCY-C2T03L notes: 1. all part numbers above indicate rohs 6. change the second letter "r" to "7" for rohs 5 part numbers. 2. add ?g? suffix at the end of the model number to indicate tray packaging. absolute maximum ratings parameter min typ max notes input voltage (continuous) -0.3 v - 80 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 36 v 48 v 75 v input current (full load) - - 4.5 a input current (no load) - 70 ma 120 ma remote off input current - 10 ma 15 ma input reflected ripple current (rms) - 5 ma 10 ma input reflected ripple current (pk- pk) - - 30 ma with simulated source impedance of 10 uh, 5hz to 20mhz. use a 100 uf/100 v electrolytic cap with esr=1 ohm max, at 200 khz@25c. i 2 t inrush current transient - - 0.1 a 2 s turn-on voltage threshold 33 v - 35.5 v turn-off voltage threshold 32 v - 34.5 v note: all specifications are typical at 25 c unless otherwise stated. 0rcy-c2t03x rohs com p liant rev.b
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 3.3 vdc /30 a output output specifications parameter min typ max notes output voltage set point 3.234 v 3.30 v 3.366 v vin=48 v, io=50%load load regulation - 4 mv 9 mv line regulation - 8 mv 16.5 mv regulation over temperature (-40deg.c-85deg.c) - 30 mv 50 mv ripple and noise (rms) - 10 mv 20 mv ripple and noise (pk-pk) - 55 mv 90 mv 0-20mhz bw, with a 1f ceramic capacitor and the minimum external tantalum cap at output. output current range 0 a - 30 a output dc current limit 33 a - 44 a short circuit surge transient - 2 a 2 s 4 a 2 s turn on time - - 25 ms overshoot at turn on - 0% - output capacitance 470 uf - 5600 uf transient response overshoot - 50 mv 100 mv 25% ~ 50% max load settling time - 150 us 250 us overshoot - 50 mv 100 mv 50% ~ 25% max load settling time v o =3.3 v - 150 us 250 us di/dt=0.1 a/us, vin=48 vdc, with a 1f ceramic capacitor and the minimum external tantalum cap at output. note: all specifications are typical at 25 c unless otherwise stated. general specifications parameter min typ max notes efficiency 90% 93% - measured at vin=48 v, full load. switching frequency 270 khz 300 khz 330 khz isolation capacitance - 2200 pf - output voltage trim range 90% - 110% remote sense compensation - - 10% vin=48v, full load and short feedback optocoupler. over temperature protection - 125 c - over voltage protection 3.8 v - 4.5 v vin=48 v, full load, in hiccup mode mtbf tbd calculated per bell core sr-332 (io=80%load, t a = 25 c) dimensions inches (l w h) millimeters (l w h) 2.30 x 0.90 x 0.37 58.42 x 22.78 x 9.50 weight - 28 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) -0.7 v - 0.8 v signal high (unit off) active low 2.4 v - 18 v when remote on/off pin is open, unit is off. signal low (unit off) -0.7 v - 0.8 v signal high (unit on) active high 2.4 v - 18 v when remote on/off pin is open, 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 3.3 vdc /30 a output output trim equations equations for calculating the trim resistor are shown below. the trim down resistor should be connected between the trim pin and gnd pin. the trim up resistor should be connected between the trim pin and the vout pin. only one of the resistors should be used for any given application. note: vo_req=desired (trimmed) output voltage [v] output voltage vo=3.3 v efficiency data efficiency curve 70% 72% 74% 76% 78% 80% 82% 84% 86% 88% 90% 92% 94% 3.00 7.50 15.00 22.50 30.00 output current (a) efficienc y 36 v 48 v 75 v () [] % 100 _ ? = vo vo req vo delta [] ? = k delta rtrimdown 22 . 10 511 module vout trim gnd rtrimdown module vout trim gnd rtri mup [] ? ? ? ? ? + = k delta vo delta rtrimup 22 . 10 225 . 1 626 11 . 5 ) 100 (
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 3.3 vdc /30 a output thermal derating curve vin=48v, with maximum junction temperature of semiconductors derated to 120 degree c ripple and noise waveforms io=0a vin=48v io=30a vin=48v note: ripple and noise with a 1uf ceramic cap and a 10 uf tantalum cap at 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 isolated dc/dc converters 48 vdc input 3.3 vdc /30 a output transient response waveforms vout=3.3v 75% to 50% load transients at vin=48v vout=3.3v 50% to 75% load transients at vin=48v note: transient response at di/dt=0.1a/us, external 330uf tantalum cap, ta=25deg c.
? 2010 bel fuse inc. specifications subject to change without notice. 011310 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 3.3 vdc /30 a output mechanical outline rohs compliance complies with the european directive 2002/95/ec , calling for the elimin ation of lead and other hazardous substances from electronic products. pin connections pin name pin dia 1 vin+ 0.040?? 2 on/off 0.040?? 3 vin- 0.040?? 4 vout- 0.060?? 5 sense- 0.040?? 6 trim 0.040?? 7 sense+ 0.040?? 8 vout+ 0.060??
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