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 4 8 vdc input 5 3 vdc/ 8 a output sep . 19 , 20 11 bel power, inc. , a subsidiary of bel fuse, inc. ? isolated ? fixed frequency ? high efficiency ? ocp/scp ? high power density ? over t emperature protection ? low cost ? input under voltage lockout ? output o ver - voltage shut d own ? remote on/off ? output v oltage t rim ? basic insulation ? class 2, category 2, isolated dc/dc converter (refer to ipc - 9592) description the 0rhb - q2t53x is isolated dc/dc conver ters that operate from a nominal 48 v dc source. these units will provide up to 424w of output power from a nominal 48 v dc input. this unit is designed to be highly efficient and low cost . features include remote on/off, over current protection and input undervoltage lockout . this converter is provided in an industry standard half - brick package. part selection output voltage input voltage max. output current max. output power typical efficiency model number active high model number active low 5 3 v dc 4 8 vdc 8 a 424 w 9 4 % 0 r h b - q2t53 0 0 r hb - q2t53 l note s : 1. add ?g? suffix at the end of the model number to indicate tray packaging. 2. all part numbers above indicate rohs 6. change the second letter "r" to "7" for rohs 5 part numbers. absolute maximum ratin gs parameter min typ max notes input voltage (continuous) - 0.3 v - 8 0 v remote on/off - 0.3 v - 18 v i/o isolation v oltage - - 1500 v ambient temperature - 40 ? c - 8 5 ? c storage temperature - 55 ? c - 125 ? c note: ratings used beyond the maximum rat ings may cause a reliability degradation of the converter or may permanently damage the device. input specifications parameter min typ max notes input voltage 3 6 v 4 8 v 72 v input current (full load) - - 1 2.6 a input current (no load) - 8 0 ma 1 2 0 ma remote off input current - 20 ma 3 0 ma input reflected ripple current (rms ) - - 20 0 ma tested with simulated source impedance of 1 2 uh , 5 hz to 20 mhz ; use 15 0 uf/100 v electrolytic capaci tor with esr=1 ohm max, at 200 k hz@25c. i 2 t inrush current tra nsient - - 1 a 2 s turn - on voltage threshold 2 3 3 v - 3 5 v turn - off voltage threshold 2 3 2 v - 3 4 v note : all specifications are typical at 25 ? c unless otherwise stated. 0 r hb - q2t 53 x rohs compliant preliminary rev. d
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 4 8 vdc input 5 3 vdc/ 8 a output sep . 19 , 20 11 bel power, inc. , a subsidiary of bel fuse, inc. output specifications parameter min typ max notes output voltage set point 52. 0 v 53 .0 v 5 4 . 0 v v in =48 v , io=50%load line regulation - - 100 mv load regulation - - 100 mv regulation over temperature ( - 40deg.c - 85deg.c) - - 6 00 mv ripple and noise (pk - pk) - - 300 mv ripple and noise ( rms ) - - 6 0 mv output current r ange 0 a 8 a output dc current limit 9 a - 1 2 a turn on time - 80 ms 1 5 0 ms overshoot at turn on - 0 % 3% output capacitance 300 uf - 1 000 uf transient response 50 % ~ 75% o f max load - - 80 0 mv settling time - - 8 00 us 75% ~ 50 % of max load - - 80 0 mv settling time - - 800 us di/dt=0.1 a/us, vin=4 8 vdc, ta=25c, wit h a 1f ceramic capacitor and 30 0 uf low esr aluminum capacitor output . note: all specifications are t ypical at nominal input, full load at 25c with a 1f ceramic capacitor and a 3 00uf aluminum cap at output unless otherwise stated. general specifications parameter min typ max notes efficiency 9 2 . 5 % 9 4 % - vin=4 8 v, full load , ta=25 ? c switching freque ncy - 2 75 k hz - input to output - - 1500 v input to case - - 500 v output to case - - 1 500 v output voltage trim range 42 v - 56 v isolation capacitance - - 15 n f over temperature protection - 1 05 - it?s the temperature of baseplate. over voltage protection 57 v - 60 v fit 258 calcul ated per bell core sr - 332 (vin= 48 v, vo= 53 v, io= 8 a, ta = 25 ? c , fit=10 9 /mtbf) dimensions inches millimeters 2. 2 8 x 2. 40 x 0. 5 12 57.91 x 60.96 x 13.00 weight - 110 g -
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 4 8 vdc input 5 3 vdc/ 8 a output sep . 19 , 20 11 bel power, inc. , a subsidiary of bel fuse, inc. note : 1.when remote on/off pin is open, for active low option, unit is off; for active high option, unit is on. 2. the efficiency is measured at vin=48v, full load and ta=25c. 3.test the temperature of baseplate. 4. all specifications are typical at nominal input, full load at 25c unless noted. control specifications parameter min typ max notes remote on/off signal low (unit o n ) - 0. 3 v - 0.8 v signal high (unit o ff ) active low 2.4 v - 18 v the remote on/off pin open, unit o ff . signal low (unit o ff ) - 0.3 v - 0.8 v signal high (unit o n ) active high 2.4 v - 18 v the remote on/off pin open, unit on. current sink 0 ma - 2 ma output trim equations equations for ca lculating 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 s hould be used for any given application. note : vo_req=desired (trimmed) output voltage[v] output voltage vo= 5 3 .000 v ? ? ? ? ? k delta rtrimdown 2 100 module vout trim gnd rtrimup module vout trim gnd rtrimdown ? ? ? ? % 100 _ ? ? ? vo vo req vo delta ? ? ? ? ? ? ? ? ? ? k delta delta delta vo delta rtrimup ) 2 100 ( 225 . 1 ) 100 (
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 4 8 vdc input 5 3 vdc/ 8 a output sep . 19 , 20 11 bel power, inc. , a subsidiary of bel fuse, inc. efficiency data 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% 2.00 4.00 6.00 8.00 output current(a) e f f i c i e n c y 36 v 48 v 72v thermal derating curve vin=48v, with addition heatsink and with maxim um junction temperature of semiconductors derated to 120c.
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 4 8 vdc input 5 3 vdc/ 8 a output sep . 19 , 20 11 bel power, inc. , a subsidiary of bel fuse, inc. ripple and noise waveform s 3 6 vdc input, 5 3 vdc/ 8 a output 48 vdc input, 5 3 vdc/ 8 a output 72 vdc input, 5 3 vdc/ 8 a output note : ripple and noise at full load, with a 1uf ceramic cap and a 300 uf al 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 6 isolated dc/dc converters 4 8 vdc input 5 3 vdc/ 8 a output sep . 19 , 20 11 bel power, inc. , a subsidiary of bel fuse, inc. transient response waveforms vout=53v, 50% to 75% load transients vout=5 3 v, 75% to 50% load transients note: transie nt response at di/dt=0.1 a/us, with e xternal 300uf al cap and 1uf ceramic cap.
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 4 8 vdc input 5 3 vdc/ 8 a output sep . 19 , 20 11 bel power, inc. , a subsidiary of bel fuse, inc. mechanical outline note: pin 6 and 8 are reserved for differential remote sense (+/ - sense). no connection is needed to the pins if th is feature is not needed. they are connected internal to the units respective output nodes thru low impedance resistors. pin connections pin function pin size pin function pin size 1 vin(+) 0.040 " 5 vo( - ) 0.080 " 2 enable 0.040 " 6 nc 0.040 " 3 case 0.040 " 7 trim 0.040 " 4 vin( - ) 0.040 " 8 nc 0.040 " 9 vo (+) 0.080 "
? 20 11 bel fuse inc. specifications subject to change without notice. 0919 11 8 corporate far east europe bel fuse inc. bel fuse ltd. bel fuse europe ltd. 206 van vorst street 8f/ 8 luk hop street preston technolog y 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.bel fuse.com fax 852 - 2352 - 3706 fax 44 - 1772 - 888366 www.belfuse.com www.belfuse.com isolated dc/dc converters 48 vdc input 5 3 vdc/ 8 a output sep . 19, 20 11 bel power, inc. , a subsidiary of bel fuse, inc. revision history date revis ion changes detail approval 2011 - 07 - 2 2 p a first release yf sun 2011 - 07 - 2 8 pb change pin6 and pin8 to nc . change the ambient temperature . yf sun 2011 - 08 - 2 9 pc updated maximum h eight to 13mm and change in mechanical drawing in the bottom of figure. yf sun 2011 - 0 9 - 1 9 pd updata the ripple and noise, input current (no load), mechanical outline, output tri m equations and vout setpoint yf sun 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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