fba48t25280 dc-dc converter 36-75 vdc input; 28vdc @ 25a output preliminary data sheet applica t ions ? rf power a m plifiers ? w i r e less communications bene fits ? high effici en cy ? low co st ? integrated m e tal baseplat e desi gn ? high er po we r output at elevated temperature s and low airflow features ? ro hs lead -free sol der a n d lead-sold er-e xempted prod uct s are available ? 28v reg u late d output at 70 0w ? efficiency up to 92% ? fixed-fre que ncy ope ration ? start-up into pre - bia s e d load ? no minim u m load re qui red ? fully prote c te d: uvlo, ocp, otp, and ovp ? c u rr en t s h ar e ? output goo d sign al ? auxiliary output of 7 to 9v at up to 20 ma ? output voltag e trim rang e: +15%/ ? 40% with indu stry-stan dard trim e q u a tions ? remote diffe rential output voltage se nse ? isolated two-pin on/o ff ? on-b oa rd inp u t differential lc-filte r ? industry - sta n dard fullb ri ck size and pi no ut ? low h e ight of 0.50? (1 2.7m m) ? wide o perating tempe r atu r e ra nge fro m -40 to 100 c ? high reliabilit y: mtbf = tbd million hours ? ul6 095 0 re cogni zed in us and can a d a and demko certified per iec/e n 60 950 (pen ding) ? all materials meet ul94, v-0 flammabilit y rating des c ription the n e w hig h perfo rma n ce 700 w fba4 8t252 80 dc-dc converte r provid es a hi gh effici en cy singl e 28v o u tput in the fullbri ck packa ge. specifi c ally de sign ed for o perat io n in wirel e ss syst ems that h a v e limited airflow and increa sed a m bient temp eratu r e s , the fba48t25 2 8 0 conve r ter utilize s the same pino ut and fun c tion ality as the indu stry-stan dard p o wer a m plifier bri c ks. operating fro m a 36-7 5 v input, the fba48t25 280 converte r prov ides a full re g u lated 28v o u tput voltage that can be trimme d from ?40% to +15% of the nominal outp u t volt age, thus p r ovidin g outstan ding d e sig n flexibility. the open fra m e module i s co nstru c ted with a dual boa rd approa ch u s ing the meta l base p late a nd discrete m agneti cs. the standa rd feature set i n clu d e s re mo te on/of f , d i ffe rential out put voltage sensi ng, inp u t unde rvoltage lockout, overtemp erat ure, output o v ervoltage an d overcurrent prot ectio n s, curre n t sha r in g, auxiliary voltage outp u t, and the output goo d sign al. with stan dard pinout and trim equatio n s , the fba48t2528 0 co nverter i s a perfect solutio n for existing a nd ne w desi g n s . incl usio n of this conve r ter in a desig n can result in signifi cant po we r a nd co st savin g s. the d e si gner ca n expect relia bi lity improvem ent over ot he r availa ble co nverters be cause of th e f ba48t252 80? s o p timize d t herm a l effic i enc y . z d -020 15 rev 1.3 www. power-o ne.com page 1 of 10
fba48t25280 dc-dc converter 36-75 vdc input; 28vdc @ 25a output preliminary data sheet electrical sp ecifica tions conditions: t a = 25 oc, vin = 48 vdc, cin=2x220 f , cout=220 f u n less otherwise specified. p a r a m e t e r n o t e s m i n t y p m a x units absolu te ma ximum ratin g s input volta ge conti nuo us 0 75 vdc input volta ge t r ansi ent 100 ms 100 vdc operatin g amb i ent t e mperatu r e limite d b y bas epl ate temper a t ure -40 85 c operatin g bas epl ate t e m p e r a t u r e - 4 0 1 0 0 c storage t e mperature -55 125 c isolation ch arac teris t ics input to output isolation 150 0 vdc isolatio n ca pa citance 260 0 pf isolatio n resist ance 10 m ? input to basep l ate isolatio n 150 0 vdc output to base plate isol atio n 500 vdc feature cha r acteristic s s w itc h i ng f r eq uenc y 300 khz output voltag e t r im range 1 industr y - st and ard eq uati ons -40 + 15 % r e mo te sen s e c o mp en sa ti on 1 percent of v out ( nom ) + 1 0 % output overvol t age protec ti on latchi n g 1 2 0 1 2 8 1 3 5 % overtemperatu r e protection ( bas e p lat e ) non-l a tchi n g 1 2 0 1 2 5 1 3 0 c overtemperatu r e protection h y steres i s 1 0 c on/off control c o n t rol l e d by cu rre n t b e t w een on/off+ and on/off- pins conv erter of f (current is lo w ) -10 0.1 madc conv erter on (current is hi gh) 1 5 madc auxili ar y o u tpu t voltage 7 9 vdc auxili ar y o u tpu t current no protecte d from overcurr ent 20 madc output good s i gn al (op en co ll ector) output is in re g u lati on ? l o w , output is out of regul ation - hi gh output good c u rrent sink 5 madc output good e x tern al pu ll-u p voltag e 35 vdc current sh are accurac y t w o u n its con n e cted in p a ra lle l 10 % parall el pi n vol t age 156 mv/a additional notes: 1 vout can be incr eased up to 10 % via the sens e leads or 15% via t he trim function. ho w e ver, th e tot a l output voltage trim from all sources should not excee d 15% of v out ( nom ). z d -020 15 rev 1.3 www. power-o ne.com page 2 of 10
fba48t25280 dc-dc converter 36-75 vdc input; 28vdc @ 25a output preliminary data sheet electrical sp ecifica tions (continu e d) conditions: t a = 25 oc, vin = 48 vdc, cin=2x220 f , cout=220 f u n less otherwise specified.. p a r a m e t e r n o t e s m i n t y p m a x units in p ut ch arac teristic s operatin g inpu t voltage ra ng e 36 48 75 vdc input und e rvo l tage l o cko ut t u rn-on t h reshol d 3 3 3 6 v d c t u rn-off t h reshol d 31.5 34.5 vdc uvlo h y st ere s is 1.5 vdc maximum input current f u ll lo ad at 36 vdc in 25 adc input stand b y current vin = 48v, con v erter disa ble d 25 ma input no l oad current (0a l o a d on the o u t put ) vin = 48v, con v erter ena bl ed 30 ma input reflect e d - ripp l e c u rrent , i c vin = 48v, 25 mhz ban d w i d th (f igure 1 3 ) 30 7 ma pk- pk ma pk- pk input rip pl e current, i s vin = 48v, 25 mhz ban d w i d th (f igure 1 3 ) 200 0 500 ma pk- pk ma pk- pk input volta ge ripp l e r e jecti o n 120 hz t b d db out p u t ch ar acte r istics ex te rn a l lo ad c a pa ci ta n c e plus full l oad (r esistive) 220 10,00 0 f t u rn-on t i me from vin t i me from uvlo to vo= 90% v out ( nom ) 3 0 m s t u rn-on t i me from on/of f t i me from enabl e to vo= 9 0 % v out ( nom ) 1 5 m s output current rang e 0 25 adc current l i mit incepti o n non-l a tchi ng 27.5 3 0 3 3 adc peak short-c i r c uit curre nt non-l a tchi ng, short = 10 m ? 65 a rms short-cir cuit curre nt non-l a tchi ng 3 5 a r m s output voltag e set point (no l oad) 27.72 28.28 vdc output reg u lat i on over line 28 56 mv over load 2 8 5 6 m v over t e mperat ure 2 0 0 dppm output voltag e rang e over line, lo ad and temp eratur e 27.25 28.50 vdc output ripp l e and n o ise ? 25 mhz band w i dt h f u ll lo ad + 10 f tantalum + 1f ceramic + 220uf el ectro l y t ic 1 9 0 2 8 0 mv pk- pk d y namic res p ons e loa d ch ang e 50%- 75%- 5 0 % of iout max, di/dt = 0.1 a/ s 450 mv di/dt = 1a/ s c o = 10,00 0f 450 mv settling t i me to 1% of vout 500 s mech an ical w e i g h t t b d g operatin g hum i dit y rh (no n -con de nsin g) 9 5 % storage h u mid i t y rh (no n -con de nsin g) 9 5 % vibrati on (sin u s oid a l) gr-63-core, section 5.4. 2 shock half sin e w a v e , 3-axis 5 0 g reliability mt b f t e lcordia sr-3 32, method i c a se 1 50% e l ectrica l stress, 40c a m bie n t t b d m h r s z d -020 15 rev 1.3 www. power-o ne.com page 3 of 10
fba48t25280 dc-dc converter 36-75 vdc input; 28vdc @ 25a output preliminary data sheet operations input and o u tpu t imped a nce these p o wer conve r ters h a ve bee n de sign ed to be stable with a minimu m ex ternal outp u t ca pa citor of 220f whe n use d in lo w in ducta nce inp u t and o u tput circuits. if the am bient t e mpe r ature i s lo we r than -20 c, then u s e 4 x 220 uf to redu ce e s r. nichi c o n upw1 h2 21m pd or eq uival ent is re com m ende d. in many appli c ation s , the indu ctan ce a s so ciated with the distri butio n from the p o w er so urce to the input of the converter can affect the stability of the converter. it is re co mm ende d that 2 x 220f wi th a voltag e rating of 10 0vdc be u s ed on th e input of th e fba48t25 28 0. in appli c atio n s whe r e the u s er h a s to u s e de co uplin g cap a cita nce at the lo ad, the p o wer conve r ter wil l exhibit stabl e operation with the external loa d cap a cita nce up to 10,000 f. on/off control (pins 1 and 2) the on/o f f pins are use d to turn the powe r conve r ter on or off remotel y via a syste m sig nal. th e on/off co ntrol is a cu rrent d r iven cont rol. it is i s olate d from both the prim ary and the se con dary b y 1500v dc. t he o n /off control turns the co nverte r on wh en 1 to 5 ma of current flows from th e on/off + pin to the o n /o ff- pi n. the conve r ter i s off when no curre n t or a small reverse current flows betwe en the pins. m a xim u m reve rse voltage shall not excee d 6 v dc. the on/ o ff control cu rre nt can be g e nerate d from the p r imary o r fro m the se con dary as shown in the appli c ation schematics in f i gure 1 a nd fi gure 2. vin + vi n - o n /o ff - o n / o ff + figure 1. o n /o ff c ontr o l usi n g vin figure 2. o n /o ff c ontr o l usi n g a u xili ar y vol t age remote sen se (pins 16 a nd 17) the rem o te se nse fe ature of th e conve r ter comp en sate s for voltag e drop s occu rri ng b e twe e n the outp u t pi ns of the co nverter an d the loa d . th e sense(-) (p in 16) and sen se(+) (pin 17 ) pin s sho u ld be conne cted at t he load or at the point whe r e regulat ion is re qui re d. figure 3. re mo te sens e circui t confi gura t io n. ca utio n if rem o te se nsi ng is n o t utiliz ed, the se nse(-) pin m u st be conn ecte d to t h e vout( -) pi n, a nd th e sense( +) pin mus t be conn ecte d t o t h e vou t(+) pin to ens u re t h e con v er ter w ill regula t e at t h e specifi ed o u t p u t v o lt age. i f the se con n ecti ons are not made, t h e con v e r ter w i l l deli v e r an o u t put v o lta g e th at is hig h er t h an t h e spe c ifie d da t a sheet v a lue . be c a us e the s e ns e le ads c a r r y min i ma l c u r r e n t, large tra c e s on the e nd-u s er b oard a r e not req u ired. ho wever, se nse traces s hould b e ru n side by side and l o cated clo s e to a g r oun d pl ane to minimi ze system n o ise and en su re o p timum perfo rman ce. the co nverte r?s outp u t overvoltage p r o t ection (ovp ) sen s e s the v o ltage a c ross vout + an d vout -, and not across th e sen s e line s , so the re sistan ce (a nd resulting voltage drop) b e t ween the o u tput pins of the co nverte r and the loa d sh ould be minimized to prevent un wa nted trigge rin g of the ovp. whe n utili zin g the rem o te se nse featu r e, ca re mu st be ta ken no t to exceed the m a ximum allo wa bl e output power capability of the convert e r, whi c h i s rw equal to the prod uct of the nominal o u t put voltage rw rl oa d vi n vi n ( + ) vi n ( - ) vou t + vou t - tr i m sen se ( + ) sen se ( - ) fb a 48t25280 z d -020 15 rev 1.3 www. power-o ne.com page 4 of 10
fba48t25280 dc-dc converter 36-75 vdc input; 28vdc @ 25a output preliminary data sheet and the all o wa ble outp u t current for the give n conditions. whe n u s in g r e m o t e sen s e, the o u tput v o ltage at the output voltage adjust /trim (pin 15) 5 % o r d o wn m i n g i s n o t h e o u tput vol t age, refer to figu re 4. a conve r ter ca n be in crea sed by a s m u ch as 10% above the n o minal rating in o r de r to maintain th e requi re d voltage a c ross the load. th erefo r e, the desi gne r mu st, if necessa ry, decre ase the maximum curre n t (origi nally obtai ne d from the de rating curve s ) by the same perce ntage to en sure th e converte r?s actual outpu t powe r re mains at or belo w the maximum all o wa ble outp u t power. the outp u t voltage can b e adju s ted up 1 40%, relative to the rate d output vol t age by the addition of an externally co nne cted re sistor. trim u p to 15% is gua rantee d only at vin 40v. the trim pi n sho u ld be l e f t o p e n i f t r i m being u s e d . to in crea se t t r im re sist o r , r t - incr , shoul d be conn ect ed bet ween the trim pin and sense+ pin, with a value of: 2 1.225 ? 22.5 1 ? )v (100 r nom o incr t ,[k ? ] whe r e, req u ire d value of trim-up resi sto r k ? ] incr t r nom o v nomin a l valu e of output voltage [v] 100 x v ) v (v ? nom - o nom - o req - o [%] de sire d (trim m ed) o u tput voltage [v]. whe n t r i m c e ed req o v m i ng up, ca re must b e take n n o t t o e x the conve r te r?s maximu m allowa ble o u t p u t p o w e r . see the p r ev ious se ction f o r a com p let e discu s sion of this requi re ment. figure 4. co nfi gurati on for i n c r easing ou tpu t v o lta g e. to de crea se the outp u t voltage (fi g u r e 5 ) , a trim resi st o r r t - decr should b e conn ecte d betwe en the trim pin an d the sense- pin, with a value of: 2 | ? | 100 r decr t ,[k ? ] whe r e, decr t r req u ire d val ue of t r im-do w n re sist or [ k ? ] and ? is define d above. figure 5. co nfi gurati on for dec r easing ou tpu t v o lta g e. trimmin g /se n s ing beyon d 115% of th e rated outp u t voltage is no t an accepta b le de sign p r actice, as thi s con d ition co uld cau s e u n wa nted trig gerin g of th e output overv o ltage p r ote c tion (ovp) circuit. th e desi gne r sh o u ld ensure that the difference betwe e n the voltage s across the co nverter? s outp u t pin s and its sen s e pi ns d oes n o t exce ed 15% of v out ( nom ), or: x nom - o sense sense out out 15% v )] ( v ) ( [v )] ( v ) ( [v d [v] this e quation is appli c abl e for any con d i tion of outpu t sen s in g and/ or output trim . parallel applications the fba48t 2528 0 features the a c tive curre n t sha r e circuit to ensure that the two converte rs co nne cted i n parall e l will share current wi thin 10% of the total output cu rren t. rl oa d vi n vi n ( + ) vi n ( - ) vou t + vou t - tr i m sen se ( + ) s e nse ( - ) r t - in c r fb a 48t25280 rl oa d vi n vi n ( + ) vi n ( - ) vou t + vou t - tr i m sen se ( + ) s e nse ( -) r t- de cr fb a 48t25280 z d -020 15 rev 1.3 www. power-o ne.com page 5 of 10
fba48t25280 dc-dc converter 36-75 vdc input; 28vdc @ 25a output preliminary data sheet auxiliar y voltage o u tpu t (pin 12) the fba48 t 2528 0 ha s th e auxiliary v o ltage o u tput voltage co nn ected to pin 1 2 . the voltage on this pi n is not precisely re gulated and will vary from 7v to 9v depe nding o n line an d lo ad con d ition s . thi s o u tpu t is not i n tern ally prote c te d and shorti ng this pin t o grou nd o r to any of the other conve r t e r terminal s may cau s e p e rma nent da mage to the converte r. outpu t volta g e good sig n al (iog) (pin13) the sign al o n pin 13 is a c tive lo w (op en colle ctor). whe never th e outp u t voltage i s out of regul ation th e pin is in the h i gh imped an ce state. the iog pin ca n sin k the m a ximum of 5ma dc and it can be externally pulled u p to the maximum of 35vdc. protection features input un der v o l tage lock out input und erv o ltage lo cko u t is stand a r d with this converter. t he converter will shut down when the input voltage drop s bel ow a pre - dete r mi ned voltage. the input vo ltage must b e typically 34 v for the c onverter to turn on. on ce the conve r ter h a s bee n turned o n , it will shut of f when the i nput voltage drop s typi call y below 32 v. this fe ature is b enefi c ial in preventing deep di scha rging of batt e rie s u s e d in telecom a ppli c ation s . outpu t ov ercurren t protection (ocp ) the conve r t e r i s p r ote c ted a gain s t o v ercu rrent o r sho r t circuit condition s. up on se nsin g a n overcurrent condition, the converter will swit ch to constant curre n t operation and th ereby be gin to redu ce its output voltag e. whe n the output voltage drop s belo w 10% of the nominal valu e of output voltage, the conve r ter will shut do wn. once the converter has shut down, it will attempt to resta r t no min a lly every 20 ms with a typi cal 2 0 % duty cycle. th e attempted re sta r t will continu e indefinitely until the ov erloa d o r short circuit con d ition i s remove d or t he outp u t voltage ri se s a b o v e 90% of its nominal valu e. once the o u tput cu rrent is b r ou ght back into its spe c ified ran ge, the conve r ter autom atically exits the hiccup mo de and continu e s normal op eration. outpu t ov erv o ltage protection (ovp) the converter will shut down if the output voltage across vo ut + an d vout- excee d s the threshold of the ovp circuitry. the ovp circuitry co ntains its o w n referen c e, i ndep ende nt of the o u tput voltag e regul ation lo o p . once the converte r ha s shut d o wn it will latch off. the latch can be reset by toggling the on/off in pu ts or by re cycling the input voltage.. ov ertemperature pro t ec tion (otp ) the conve r ter will shut do wn unde r a n overtemp erat ure con d itio n to protect itself from overhe ating caused by ope ra tion out side the therma l deratin g curv es, or ope rati on in ab no rm al co ndition s su ch a s syst em fan failure. ince the converte r ha s shut down, it will automat ic ally restart after it has cool ed to a safe operating temperature. safety requi rements the conve r ters meet no rth a m eri c an an d internation a l safety re g u latory requi reme nts p e r ul6 095 0 an d en609 50. b a si c insulatio n is p r ovide d betwe en inp u t and output. the conve r te rs have n o int e rnal fuse. if requi re d, the external fu se need s to b e provided t o protect th e c onverter from c a tas t rophic failure. refer to the ?input fu se selection for dc/ dc co nverte rs? appli c ation n o te on www. pow er -on e - c o m fo r p r op er sele ction of t he in put fu se. both inp u t trace s and the cha s sis grou nd tra c e (if a pplicable ) mu st be capa ble of co ndu cting a current of 1.5 times the value of th e fuse with out openi ng. the fuse mu st not be pla c e d in the grou nd ed input line. abnorm a l a nd co mpo n ent failure tests were con d u c ted wi th the input p r otecte d by a 30a fuse. if a fuse rated greate r tha n 30a is u s ed, addition a l testing may be req u ire d . to protect a group of conve r ters with a single fuse, the rating ca n b e increa sed fro m the recom m ende d valu e above. electromag n e tic comp ati b ilit y (emc) emc requi re ments m u st be met at th e end -p rod u ct system l e vel, as n o spe c if ic sta nda rd s dedi cated to emc charact e risti cs of bo ard m ounte d comp one nt dc-dc conve r t e rs exi s t. ho wever, po wer-one te sts its conve r ters to seve ral system leve l standa rd s, prima r y of which is th e more stri nge nt en55 022, inform ation tech nolog y e quipm e n t - rad i o disturban ce cha r a c teri stic s-lim i ts and m e thods of m easurem ent. an effective i n ternal l c di fferential filter sig n ificantly redu ce s inp u t reflected rip p le cu rrent, and improve s emc. with the a d dition of a simple external filter, th e fba48t25 28 0 converte r p a sse s the re q u irem ents of cla ss a con d u cted emissio n s p e r en550 22 and fcc z d -020 15 rev 1.3 www. power-o ne.com page 6 of 10
fba48t25280 dc-dc converter 36-75 vdc input; 28vdc @ 25a output preliminary data sheet requi rem ents. refe r to figure 6 for the recomme nde d config uratio n of the input filter. figure 6. input filter configurati on required t o m eet cispr 22 class a for cond ucted emissions. startu p infor m ation scenario #1: initial startup from bulk su pply on/of f function en ab led, co nver ter started via ap plic atio n of v in . see f i gure e. t i m e c o m m e n t s t 0 on/of f pin is on; sy stem fro n t-end p o w e r is toggl ed o n , v in to converter begins to rise. t 1 v in crosses un dervo ltage loc kout protectio n circuit thresh ol d; converter e n abl ed. t 2 conv erter beg i n s to respon d to turn-on command (converter turn-on delay ). t 3 conv erter v out reaches 9 0 % of nomin al val u e. f o r this examp l e, the total con v erter startup time (t 3 - t 1 ) is t y pic a ll y 30 ms . scenario #2: initial startup using on/o f f pin with v in previo usl y po w e re d, converter start ed via on/of f pin. see f i gur e f . t i m e c o m m e n t s t 0 v input at nomin al val ue. t 1 arbitrary time w hen on/of f pin is e n a b le d (converter e n a b le d). t 2 end of conv erter turn-on d e l a y. t 3 conv erter v out reaches 9 0 % of nomin al val u e. f o r this examp l e, the total con v erter startup time (t 3 - t 1 ) is t y pic a ll y 15 ms . figure 7. start u p scen ario #1. figure 8. start u p scen ario #2. on/off state v out t 0 t 1 t 2 t 3 off on v in t v in on/off state v out t t 0 t 1 t 2 t 3 on off z d -020 15 rev 1.3 www. power-o ne.com page 7 of 10
fba48t25280 dc-dc converter 36-75 vdc input; 28vdc @ 25a output preliminary data sheet characteriz ation gener a l info rmation the conve r t e r h a s be en ch ara c te rized for ma ny operational asp e ct s, to inclu de the r mal de rating (maximum lo ad cu rre nt as a function of basepl ate temperature ) , efficiency, startup a nd sh utdown para m eters, output rip p le and no ise, tran sien t respon se to load ste p -ch ange, ove r lo ad, and sho r t c i rc uit. the follo win g pag es contain spe c i f ic plots or waveforms a s soci ated wit h the co nvert e r. additional comm ents fo r spe c ific data are p r ovide d belo w . test conditi ons all thermal data pre s e n ted wa s taken with the conve r ter mo unted to a 6 ? x12?x1 ? finn ed heat sin k . the fba i s de sign ed to ope rate i n an e n cl osed environ ment with the dissi pated powe r bei ng extracted tho ugh the ba se plate into the heatsi nk. therm o coupl es we re used to en su re th at the inte rnal comp one nts were op erati ng with in th eir soa with the baseplat e at 100 c. refer to fi g u re 9 fo r the optimum thermoco uple lo cation. thermal der a ting f o r e a c h se t o f c o nd itio n s , the ma ximu m load curre n t wa s d e fined a s the lowe st of: (i) the o u tp ut current a t which the base plate temperature doe s not exceed a maxim u m spe c ified temperature of 100 c as i ndicated by therm o couple measure, or (ii) the n o min a l rating of the conve r ter. tempe r atu r e at the the r moco uple lo cation sho w n in figure 9 sho u ld not ex cee d 100 c i n order to ope rat e insid e the derating cu rves. figure 9. l o cati on o f t h e t h erm o cou p le for t h er mal tes t in g. the derating curve sho w in g av ailable o u tput powe r a s a functio n of the ba se plat e tempe r atu r e is sh own i n figure 12. efficiency figure 10 sho w s th e efficie n cy vs. load current plot for ambient tem peratu r e of 2 5 c a nd inp u t voltages o f 36v, 48v, 60v, and 75 v. po w e r dis s ipation figure 11 sho w s the p o wer dissi pation v s . load curren t plot for ta = 25 c and in put voltage s of 36v, 48v, 60v, and 75v . vin + vin - on / of f - on / of f + +vout -vout -vout -vout +vout +vout 2. 3 0 " 1. 2 " z d -020 15 rev 1.3 www. power-o ne.com page 8 of 10
fba48t25280 dc-dc converter 36-75 vdc input; 28vdc @ 25a output preliminary data sheet characteriz ation data efficiency curv es 86% 87% 88% 89% 90% 91% 92% 51 0 1 5 2 0 2 l o a d cu rre n t , a e f f i ci en cy 5 36v 48v 60v 75v . figure 12. a v a i l a ble po w e r vs. basepla te t e m p erature test se tup figure 10. ef fic i enc y v s . l o ad c u rrent a nd i n p u t v o lta g e f o r fb a 4 8 t 2528 0 c o n v ert e r at ta= 25c. 15 25 35 45 55 65 75 85 5 1 01 5 2 02 lo a d c u r r e n t , a p o w e r d i ss i p at i o n , w 5 36v 48v 60v 75v figure 13. te st setu p for meas uring i n p u t re fle c ted ri pple currents, ic an d is. figure 11. po w e r dissip a tio n v s . load curren t and i npu t v o lta g e f o r fb a 48t25280 co n v e r ter at t a = 25c . z d -020 15 rev 1.3 www. power-o ne.com page 9 of 10
fba48t25280 dc-dc converter 36-75 vdc input; 28vdc @ 25a output preliminary data sheet ph y s ical information pa d/pin # func tio n 1 o n / o f f + 2 o n / o f f - 3 + v i n 4 - v i n 5 - v o u t 6 - v o u t 7 - v o u t 8 + v o u t 9 + v o u t 1 0 + v o u t 1 1 n o t u s e d 1 2 a u x 1 3 i o g 1 4 p a r a l l e l 1 5 t r i m 1 6 - s e n s e 1 7 + s e n s e fb a 4 8t platform notes ? all dimensions ar e in inches [mm] ? pins 1-2 and 12- 17 are ? 0.040 ? [1.02] w i thout a s houlder ? pins 3-10 are ? 0.080? [2.0 4] w i thout a should e r ? pin material: bra ss alloy 360 ? pin finish: tin over nickel tolera n ces: [u nless otherw i se i ndicated] x. xxx in. +/- .010 [x. x x mm + / - 0.25] x. xx in. +/- .020 [x. x mm +/- 0.5] converter part numb ering/ordering information produc t series inpu t vo ltag e mount ing scheme rated current outp ut voltage on/of f lo gic maximum he ight [ht] pin le n g th [pl] sp ecial f eatu r es ro hs f b a 4 8 t 2 5 2 8 0 - p c a p g fullbrick format 36-7 5 v t ? t h rough- hol e 25 ? 25ad c 280 ? 28v p ? positive c ? 0.52? t h rough hol e a ? 0.188? b ? 0.145? p ? paralle lla ble q ? parallel l a b le w i t h m3 threaded standoffs n ? not para lle lla bl e m ? not para lle lla bl e w i th m3 thread ed standoffs no suffix ? rohs lea d -sol der- exempti on compli ant g ? rohs compliant for all si x substanc es the e x ample a bove describes p/n fba48 t 252 80-pcapg: 36- 75 v i nput, th ro ugh-hole, 2 5 a @ 28v out put, positive on/of f logic, maximum height of 0.52?, 0. 188? p i ns, parallelable w i th no n-th reade d standoffs, and rohs compliant for all 6 substances. notes : 1. nuclear an d medical appli c ations - po w e r- one p r oducts are not designed , intended for us e in, or autho rized for use as critical components in lif e support s y stem s, equipment used in hazardous e n vi ronments, or nuclear control sy st ems w i thout t he exp r ess w r itte n consent of the re specti ve divisional president of p o wer- one, inc. 2. technica l re visions - the a ppearance of pro ducts, including safet y ag enc y cert ifications pictured on labels, ma y change depe ndin g on the date ma n u factured. speci f ications are subject to change w i t hout notice. z d -020 15 rev 1.3 www. power-o ne.com page 10 of 10
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