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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 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 bel power inc. , a subsidiary of bel fuse inc. features ? isolated ? input under voltage lockout ? fixed frequency ? output over voltage shutdown ? high efficiency ? ocp/scp ? h igh power density ? over temperature protection ? low cost ? positive/negative remote sense ? output voltage trim ? remote on/off ? basic insulation ? through hole ? class 2 , category 2, isolated dc/dc converter (refer to ipc - 9592) ? ul60 950 - 1 recognized (ul/cul) (pending) applications ? networking ? computers and peripherals ? telecommunications description the 0rsb - 40u05b is an isolated dc/dc converter that operate s from a nominal 24 v dc or 48 v dc source . the unit will provide up to 40 w of output power from an 18 - 75 v dc wide input range. the 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 i n an industry standard sixteenth brick package. part selection output voltage input voltage max. output current max. output power typical efficiency model number active low 5.0 vdc 18 vdc - 75 vdc 8 a 4 0 w 8 7 % 0 rsb - 40u 05 b note : add ?g? suffix at the e nd of the model number to indicate tray packaging. part number explanation 0 r sb ? 40 u 05 b 1 2 3 4 5 6 7 1 --- t hrough hole 2 --- rohs 6, change ? r ? to ? 7 ? means rohs 5 3 --- series name, 1/ 16 brick 4 --- series code 5 --- input range (18 - 75v) 6 --- output v oltage (5v) 7 --- enable, active low, pin length is 0.11 inch 0 rs b - 40u 05b rohs compliant preliminary rev. a
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 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 bel power inc. , a subsidiary of bel fuse inc. absolute maximum ratings parameter min typ max unit notes input voltage (continuous) - 0.3 - 80 v input transient voltage - - 100 v 100ms maximum remote on/off - 0.3 - 18 v i/o isolation voltage - - 1500 v ambient temperature - 40 - 85 ? c storage temperature - 55 - 125 ? c note: ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may permanently damage the device. input sp ecifications parameter min typ max unit notes input voltage 18 48 75 v input current (full load) - - 3.5 a input current (no load) - 6 0 12 0 ma remote off input current - 1 3 ma input reflected ripple current (pk - pk) - 20 50 ma input reflected ripple current ( rms ) - 3 7 ma with simulated sourc e impedance of 10uh, 5hz to 20mhz. use a 100 uf/100v electrolytic capacitor with esr=1 ohm max, at 200khz@25c. input over voltage lockout 78 - 8 2 v i 2 t inrush current transient - 0.01 0.02 a 2 s turn - on v oltage threshold 16.6 17.2 17.8 v turn - off voltage threshold 16.2 16.8 17.4 v note : all specificatio ns are typical at nominal input, full load at 25 ? c unless otherwise stated . output specifications parameter min typ max unit notes output voltage set point 4.925 5 .000 5.075 v vin=48 v; io=50% load l oad regulation - 4 9 mv l ine regulation - 4 9 mv regulation over temperature ( - 40 ? c to +85 ? c ) - 15 30 mv total regulation - 23 48 mv ripple and noise (pk - pk) - 70 120 mv ripple and noise ( rms ) - 25 50 mv 0 - 20mhz bw, with a 1f ceramic capacitor and a 10uf tantalum cap at output. output current range 0 - 8 a
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 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 bel power inc. , a subsidiary of bel fuse inc. output specifications (continued) paramet er min typ max unit notes output dc current limit 8.8 10 12.5 a short circuit surge transient - 0.5 1 a 2 s hiccup mode, auto recovery. turn on time - 2 5 5 0 ms overshoot at turn on - 0 5 % output capacitance 150 - 2200 uf transient response overshoot - 250 3 5 0 mv 25% ~ 50% max load settling time - 1 0 0 2 0 0 ms overshoot - 250 35 0 mv 50% ~ 25% max load settling time vo= 5 v - 1 0 0 20 0 ms di/dt=0.1a/us, vin=48vdc, ta=25c, with a 1f ceramic capacitor and a 10uf tantalum cap at 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 85 87 - % vin=48 v, full load switching frequency - 500 - khz over temperature protecti on - 1 25 - ? c the otp threshold is set at 125 ? c in non - latch mode, and the module will restart automatically when temperature falls down to 1 1 5 ? c . output voltage trim range 90 - 110 % over voltage protection - 130 160 % this voltage is achieved by trimm ing up output slowly. dimensions inches (l w h) millimeters (l w h) 1.3 0 x 0.9 0 x 0. 46 33.0 2 x 22. 86 x 11.69 - weight - 14 - g isolation characteristics input to output - - 1500 v isolation resistance 10m - - ohm isolation capacitance - 3900 - pf 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 4 isolated dc/dc converters 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 bel power inc. , a subsidiary of bel fuse inc. efficiency data 50% 55% 60% 65% 70% 75% 80% 85% 90% 0.80 2.00 4.00 6.00 8.00 output current (a) e f f i c i e n c y 18v 24v 48v 75v thermal derating curve maximum junction temperature of semiconductors derated to 120 degree c.
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 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 bel power inc. , a subsidiary of bel fuse inc. thermal derating curve (con tinued) derating curve under normal input the otp is achieved by thermistor r65 and the threshold is set at 120 ? c in non - latch mode; the hottest component q5 reaches 125 ? c with 10 0lfm air flow correspondingly. it will restart au tomatically when the temperature falls down to 115 ? c . the protecting point will be varied a little under different conditions (air flow, ambient temperature, input voltage, load...). temperature reference points on top side vin= 48vdc vin= 24vdc
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 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 bel power inc. , a subsidiary of bel fuse inc. ripple and noise waveform 48 vdc input, 5 vdc output note: ripple and noise at full load, with a 1uf ceramic cap and a 10 uf tantalum cap at output , ta=25 deg c . transient response waveforms v out = 5 v 50% - 2 5% load transients v out = 5 v 2 5% - 50% load transients note: transient response at di/dt= 0. 1a/us, vin=48vdc, with a n external 100uf 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 7 isolated dc/dc converters 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 bel power inc. , a subsidiary of bel fuse inc. startup rise t ime sta rt up time vin= 48 v, vo= 5 v, 100% load note: start up waveform, tested with an external 220uf tantalum cap and 1uf ceramic cap , ta=25 deg c . remote on/off parameter min typ max unit notes signal low (unit on) - 0.3 - 0.8 v signal high (unit off) active low 2.4 - 18 v r emote on/off pin is open, the module is off. current sink - 0 - 1 ma recommended remote on/off circuit for active low control with open collector/drain circuit control w ith photocoupler circuit control with logic circuit permanently on ch1: vo ch 2 : vin vin= 48 v, vo= 5 v, 100% load vin + vin - on / off vin + vin - on / off vin + vin - on / off vcc vin + vin - on / off
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 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 bel power inc. , a subsidiary of bel fuse inc. output trim equations equations for calculating the trim resistor are shown below ( u n i t : 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] output voltage vo=5.002v ? ? ? k delta rtrimdown 22 . 10 511 ? ? ? ? ? ? ? ? k delta vo delta rtrimup 22 . 10 225 . 1 626 11 . 5 ) 100 ( module vout trim gnd rtrimdown module vout trim gnd rtrimup ? ? ? ? % 100 _ ? ? ? vo vo req vo delta 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5 0 40 80 120 160 200 240 280 320 360 400 adjusted output voltagevo,adj (v) t r i m r e s i s t o r v a l u e r t r i m _ d o w n ( k o h m ) 5 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 0 250 500 750 1000 1250 1500 1750 2000 2250 2500 adjusted output voltagevo,adj(v) t r i m r e s i s t o r v a l u e , r t r i m _ u p ( k o h m )
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 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 bel power inc. , a subsidiary of bel fuse inc. remote sense this module has remote sense compensation feature. it can minimize the effects of resistance between module?s output and load in sys tem layout and facilitates accu r ate voltage regulation at load terminals or other selected point. 1. the remote sense lines carries very little current and hence do not require a large cross - sectional area. 2. this module compensates for a maximum drop of 10% of the nominal output voltage. 3. if the unit is already trimmed up, the available remote sen se compensation range should be correspondingly reduced. the total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage. 4. when using remote sense compensation, all the resistance, parasitic inductance and capacitance of the system are incorporated within the feedback loop of this module. it can make an effect on the module's compensation, affecting the stability and dyna mic response. a 0.1uf ceramic capacitor can be connected at the point of load to de - couple noise on the sense wires. 5. recommend the connection of remote sense compensation as below figure. there are a resistor rs+ ( 51 ohm) from vo+ to sense+ and a resi stor rs - ( 10 ohm)) from vo - to sense - inside of this module. 6. if not using remote sense compensation, please connect sense directly to output at module's pin, that is, connect sense+ to vo+ and sense - to vo - at module's pin, the shorter the b etter. s ee below figure. sense + sense - r s - v o - vo + r s + load sense + sense - r s - vo - v o + r s + load
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 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 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 tempe rature 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 micro inches minimum nickel plate . 2 ) undimensioned components are shown for visual reference only. 3 ) all di mensions 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 dia. 1 vin (+) 0.04 ?? 2 on/off 0.04 ?? 3 vin ( - ) 0.04 ?? 4 vout ( - ) 0.062 ?? 5 sense( - ) 0.04 ?? 6 trim 0.04 ?? 7 sense(+) 0.04 ?? 8 vout (+) 0.062 ??
? 20 11 bel fuse inc. s pecifications subject to change without notice. 0 524 11 11 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 ko ng 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 18 v dc - 75 vdc input 5 v dc / 8 a output , 1/16 brick may 24 , 20 11 bel power inc. , a subsidiary of bel fuse inc. revision history date revi sion changes detail approval 20 1 1 - 0 5 - 24 pa first release jz wang rohs com p liance c omplies with the european directive 2002/95/ec, calling for the elimination of lead and other hazardous substances from electronic products.

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