qts48t46096 dc-dc converter data sheet 441-watt @ 48vin quarter-brick bus converter applica t ions ? intermedi ate bus archite c t u re s ? telecommu ni cation s eq uip m ent ? lan/wa n ? data processi ng features ? ro hs lead -free and le ad-solder-exem p t prod uct s are available ? delivers up to 500 watts with a 55 vdc i nput ? co st-effe ctive, single-boa rd desig n ? 5:1 fixed rati o conve r ter ? ultra - hig h efficien cy over 9 7 % ? 0.48? maximu m height (1 2.2 mm) ? narro w inp u t rang e 36 ? 5 5 vdc ? parallel o peration (3 unit s ) ? input-to-outp u t isolation: 1 500 vdc ? start-up into high capa citive load ? low con d u c ted and radiat ed emi ? output overcurrent prote c t i on ? input unde rvo l tage locko u t ? input overvoltage shutdo wn ? overtemp erat ure p r ote c tion ? approve d to ul 60 950 -1/ can/ csa-c2 2.2 no. 6095 0-1-0 3 , and t u v app roved to en 6 0950 -1, iec 60950 -1 des c ription the qts4 8t 4609 6 bu s co nverter p r ovi des a 5:1 fixed ratio, isol ated, step -do w n voltage. ou tput voltage is directly prop ortio nal t o inp u t volta ge with a co nversi on rati o of 5:1; at 48 vdc th e resulting out put voltage woul d be 9.6 vdc. th e converte r p r ovid e s ultra-high effi cien cy over 9 7 %; a s a re sult ve ry little heat is dissipate d an d a h eat sin k is not re quire d. the qts4 8t 4609 6 is a n excelle nt cho i ce for i n term ediate bu s a pplication s where mult iple output volta ges are requi re d and a 9.6 v rail wi ll be use d to power ?poi nt of load? d e vice s. model selection mode l i n p u t vo ltag e vdc inpu t current, max a d c outp ut voltage v o u t ,@ 48v in vdc outp ut current ( a ) outp ut rip p l e/no ise, mv p- p ( m ax .) ty pic a l efficien c y @ 48vi, 39.5 a qt s48t 46096 -ncap 36-5 5 9.3 9.6 46 250 97.3 this product is intended for inte gr ation into end-us e equipment. all the require d pro c edures for ce marking of end-u s e equipme nt should be follow ed. z d -020 76 rev 2.1 page 1 of 7 w w w . pow er-one.com
qts48t46096 dc-dc converter data sheet 441-watt @ 48vin quarter-brick bus converter absolu te ma ximum ratin g s stresse s in e x cess of the absolute max i mum rating s ma y cau s e p e rform a n c e d egra dation, a d versely effect long- term relia bility, and cau s e perm ane nt damage to the conve r ter. p a r a m e t e r c o n d i t i o n s / d e s c r i p t i o n m i n m a x u n i t s input volta ge contin uou s 0 5 5 v d c operatin g t e mperatur e *cas e t e mperature (q11) -40 125 c storage t e mperature -40 125 c * if necessary th e factory w ill pro v ide an assembl y dra w in g upon request to locate q 11 en v i ronmental and mech anical specifications all specifi c ati ons a pply over sp ecifie d input voltage, output load, a nd tempe r atu r e ra nge, unl ess otherwi se noted. p a r a m e t e r c o n d i t i ons/descrip t i o n m i n n o m m a x u n i t s shock (half-sin e w a ve , 6ms), 3 axes 50 g sinus oid a l vi br ation gr-63-core, section 5.4. 2 1 g w e i g h t 1 . 7 / 4 8 o z / g w a ter w a shin g standar d proc ess yes mt b f (po= 2 60 w, t a = 30 c) per bellc ore t r -nw t -00033 2 3.5 mhrs isolation sp ecifica tions all specifi c ati ons a pply over sp ecifie d input voltage, output load, a nd tempe r atu r e ra nge, unl ess otherwi se noted. p a r a m e t e r c o n d i t i ons/descrip t i o n m i n n o m m a x u n i t s insulati on safe t y rati ng f unction al isolatio n volta ge input to output 150 0 vdc isolatio n resist ance 10 mohm isolatio n ca pa c i t a n c e 1 1 0 0 pf input specifi cation s all specifi c ati ons a pply over sp ecifie d input voltage, output load, a nd tempe r atu r e ra nge, unl ess otherwi se noted. p a r a m e t e r c o n d i t i ons/descrip t i o n m i n n o m m a x u n i t s input volta ge conti nuo us 36 48 55 vdc t u rn-on input voltag e rampi ng u p 33 35 37 vdc t u rn-off input voltag e rampi ng d o w n 31 32 33 vdc output rise t i me t i me from vo @ 10% of nom inal to vo @ 90% of nomin a l, w / lo ad = 365 w resistor + 3000 f cap a citor 0 . 5 2 m s input reflect e d rippl e curr ent f u ll lo ad, 12 h source i nduc tance 5 0 m a p - p inrush t r ansie nt vin= vin.ma x 1 a 2 s input overvolta ge shutd o w n t u rn-off voltage thresho l d t u rn-on voltag e thresho l d vin 57 55 59.5 58 z d -020 76 rev 2.1 page 2 of 7 w w w . pow er-one.com
qts48t46096 dc-dc converter data sheet 441-watt @ 48vin quarter-brick bus converter outpu t spec ifications all specifi c ati ons a pply over sp ecifie d input voltage, output load, a nd tempe r atu r e ra nge, unl ess otherwi se noted. p a r a m e t e r c o n d i t i ons/descrip t i o n m i n n o m m a x u n i t s output voltag e over lin e loa d and temperatur e 6 . 8 1 1 . 5 v d c output current io 0 46 a loa d re gul atio n vo 300 500 mv t u rn-on oversh oot vo 3 % t r ansient resp onse 25% l oad ste p chan ge @ 1a/ s (% of vo nomi nal) vo 4 % ad mi ssi bl e lo ad c a pa ci tan c e i ra t e d , nom vin 300 0 f output current limit t h reshol d latch-off (recy cle po w e r or toggle shutdo w n pin to re-start) p o 110 % 1 3 0 % 1 5 0 % s w itc h i ng f r eq uenc y 240 khz feature spe c ification s all specifi c ati ons a pply over sp ecifie d input voltage, output load, a nd tempe r atu r e ra nge, unl ess otherwi se noted. p a r a m e t e r c o n d i t i ons/descrip t i o n m i n n o m m a x u n i t s shutdo w n (on /of f ) negative logic conv erter on source c u rrent conv erter of f positive logic conv erter on open circ u it voltag e conv erter of f on/off signal is lo w ? conv erter is on on/of f pin is conn ected to - v in on/off signal is lo w ? c onverter is off on/of f pin is floatin g -0.5 2.5 2.5 -0.5 0.8 1 37 37 5 0.8 vdc madc vdc vdc vdc vdc overtemperatu r e protection averag e bo ard temperature + 130 + 140 c current sh are accurac y see pag e 4. ?parall e l oper atio n? 5 10 % z d -020 76 rev 2.1 page 3 of 7 w w w . pow er-one.com
qts48t46096 dc-dc converter data sheet 441-watt @ 48vin quarter-brick bus converter char acteristi c curv es e f f i c i e n c y v s li ne , lo a d 85. 00 87. 00 89. 00 91. 00 93. 00 95. 00 97. 00 99. 00 10 % 20% 30 % 40% 5 0% 60% 70% 8 0% 90% 1 0 0% lo a d (% ) e f f i ci e n cy ( % ) 36 48 55 figure 1. qts4 8t46096 e ffici e n c y v s . ou tp ut load figure 2 sh o w s the re co mmend ed co nne ction s for the qts48t 4 6096 conve r ter. figure 2. t y p i c a l a p pli cati on o f qts48t4 6096 the qts4 8t 4609 6 co nve r ter d o e s not requi re a n y external com pone nts for p r ope r op erati on. however, if the distrib u tion of the inp u t voltage to the converte r contai ns sig n i ficant ind u ct ance, a cap a c itor c1 may be requi red to enh an ce perfo rma n ce of the conve r ter. a minimum of a 1 00 f ele c trolytic c a pac i tor with the es r<0.5 ? at 100 khz is recomme nde d for the qts 48t46 096. refer to the ?inrush cu rre nt co ntrol application note? on www.p o wer-on e.com fo r sugge stion s o n how to limit the magnitud e of the inrush curre n t. for output de cou p ling we recom m en d u s ing a 10 f low esr tantalum (avx tpsc106m 025r0500 is use d in our te st setup ) an d a 1 f cer a m i c ca pa cit o r. note, that t he capa cito rs d o not substitute th e filtering re quired by the loa d . shutdo w n f eatur e de scr iption the o n /off pin in the qts48t 4609 6 co nverte r function s a s a normal soft shutd o wn. it is refe re nced to the ?vi n pin (se e fi g u re 2). wit h the po sitive logic, when t he on/ o ff p i n is pull ed lo w, the output is turne d off and the unit goe s into a very low inp u t power mo de. with n egativ e logi c, whe n the on/o ff pin is pull ed low, the unit is turne d on. an open coll ector switch i s re co mmen ded to contro l the voltage betwee n the on/off pi n and the -vi n pin of the co nverter. th e on/off pin is pulle d up internally, so no extern al voltage sou r ce is requi red. the u s e r sh o u ld avoid con nectin g a re si stor between the on/off pin and the +vin pin. whe n the o n /off pin i s used to achieve remote control, the u s er mu st ta ke ca re to in su re that the pin referen c e for the cont rol i s re ally the -vin pin. the control sig nal must not be refere nced a head of emi filtering, o r re motely from t he unit. opti cally coupling the inform ation an d lo ca ting the opti c al cou p le r dire ctly at the modul e will solve a n y of these probl em s. note : if the on/ o f f pi n is not used, it c an be left floating (positive logic), or connected to t he -vin pin (nega tive logic). parallel operation the follo win g pre c a u tion s must be ob serve d whe n operating two or more qts 48t46 096? s i n parall e l: 1. the inp u ts of all units mu st be attache d to the same volt age source 2. the pcb t r ace re si stan ce into ea ch unit s h ou ld b e equ a lize d as mu c h as is pr ac tic a l. 3. the en able pins m u st b e tied togethe r and operated a s a single u n it. 4. the und ervol t age lockout start-up point will vary from uni t to unit, therefore the dv/ d t of the input sou r ce a s it ri ses f r om 0v to its final value will affect the ability of the parallel units to tu rn o n into a lo ad equal to more that the maximum rated load of 1 unit. the dv/dt of the risin g edge of the i nput voltage must be g r eate r th an 2v/m se c. if three units are to be ope ra ted in parall e l, it is stro ngly recomme nde d that the maximum load curre n t be li mited to the maximum current rating of a si ngle unit u n til the output voltage excee d s 9 0 % of the rated output voltag e. 5. the accuracy of the current shari ng will be affected by the seri es im peda nce bet wee n each unit at the load. balancin g these impeda nces will enha nce the current sha r e ac cur a cy . z d -020 76 rev 2.1 page 4 of 7 w w w . pow er-one.com
qts48t46096 dc-dc converter data sheet 441-watt @ 48vin quarter-brick bus converter 6. figure 3 sh ows the recommen ded airflow dire ction, uni t orientation and temp erature variation of three p a rall el ed units with 10% curre n t sha r e accura cy. please note tha t the maximum power available will be reduced by up to 1 0 % d ue to cu rre nt sh are a c curacy. (at 48 volts in , the maximu m po wer avai lable woul d be 35 0 w x 3unit x 90% derati ng = 945 w) the qts 48t 4609 6 converter is d e si gne d for natu r a l or forced convectio n cooling. th e maximum allowable o u tput cu rre n t of the converte r is determi ned b y meeting the deratin g criteria for all comp one nts use d in the conve r ter. for example, the maximu m se micondu ct or j unctio n te mperature is not allo wed to exceed 125 c to e n sure relia ble l ong - term ope ratio n of the converter. cont act power-on e for the com p l e te list of the deratin g criteria. figure 3. t h ree unit s in parallel w i th 50 v inpu t v o lta g e, 900 w ou tp ut p o w e r, 70 c am bient , an d 200 l f m airfl o w . safety consi d eratio ns the qts 48t 4609 6 converter features 1 500 volt dc isolatio n fro m input to o u tput. the i nput-to - outp u t resi stan ce is greate r th an 10 m ? . thi s co nverte r i s provide d with functional in sulatio n between inp u t and output circuit s a c cording to all iec6095 0 ba se d stand ard s . neverth e le ss, if the system using the conve r ter ne eds to re ceiv e safety a g e n cy ap proval, c e r t a i n r u les mu s t be fo llow e d in th e de s i gn o f the system. in particular, all of the creep age and clea ran c e requireme nts of the end-u s e safe ty requi rem ents must be observed. t h e s e do cum ent s inclu de ul 6 0950 - csa 6095 0-0 0 a n d en609 50, althoug h oth e r o r ad ditional re quirem ents may b e need ed for sp ecific a ppli c at ions. the qts4 8t 4609 6 co nve r ter ha s n o internal fu se. the external fuse m u st b e provided t o protect the s y s t em from c a tas t rophic failure. the fus e with a rating not greater than 1 0 a is recom m ende d. the use r ca n sel e ct a lowe r rating fuse ba sed up on the highe st in ru sh tran sient at the ma ximum input voltage and the maximum input current of the conve r ter, which occu rs at the minimum in put voltage. bot h input t r a c e s a nd the ch assis groun d trace (if appli c abl e) mu st b e ca pable of con d u c ting a curre n t of 1.5 times the value of the fuse without openi ng. t he fuse mu st not b e p l ace d in the grou nde d inp u t line, if any. in ord e r fo r the output of the q t s48t46 096 conve r ter to be con s id ere d as selv (safety extra low v o ltage ) or t n v-1, a c cordi ng to a ll iec609 50 based sta n d a rd s, one of the followin g requi rem ent s must be met i n the system desi gn: x if the voltage sou r ce fee d in g the mo dule is selv or tnv, the output of the conve r ter may be grou nde d or ungroun ded. x if the voltage sou r ce fee d i ng the m odul e is elv, the output of the conve r ter may be consi dere d selv only if the output is groun ded per the requi rem ents of the standa rd. x this info rmat ion is provid ed for guid a n ce o n ly and the u s er is respo n sibl e for a n y desig n c o ns ide r a t ions r e ga rd in g sa fe ty. thermal con s ideratio ns airflow direction the g r ap h i n figu re 4 and fi gure 5 sh ow the maximum o u tput cu rre n t of the qts48t46 096 conve r ter at different ambient temp eratu r e s und er both n a tural and fo rced (transve rse airfl o w dire ction, from pin 1 to pin 3) conve c tion. for exam ple, the qts48t 4609 6 ope rat i ng at 48vin, 70 c ca n d e liver up to 3 3 .6a relia bly with 200 lfm force d air. z d -020 76 rev 2.1 page 5 of 7 w w w . pow er-one.com
qts48t46096 dc-dc converter data sheet 441-watt @ 48vin quarter-brick bus converter 0 5 10 15 20 25 30 35 40 45 50 20 30 40 50 60 70 80 90 a m bi en t t e m p er at u r e ( c ) o u tp u t c u rre n t (a ) 400 lfm 300 lfm 200 lfm 100 lfm 50 lf m figure 4. t h er mal dera tin g cu r v e vi n = 36v, v a r y i ng a i r f lo w (i npu t vol t age co nsta nt) 0 5 10 15 20 25 30 35 40 45 50 20 30 40 50 60 70 80 90 a m bi en t t e m p er at u r e ( c ) o u tp u t c u r r e n t (a ) 400 lf m 300 lf m 200 lf m 100 lf m 50 lf m figure 5. t h erm a l derati ng c u r v e vi n = 48v, va r y i ng a i r f lo w (input v o lta g e c o n s tan t) z d -020 76 rev 2.1 page 6 of 7 w w w . pow er-one.com
qts48t46096 dc-dc converter data sheet 441-watt @ 48vin quarter-brick bus converter mecha n ical dra w i n g ordering information op tion s su ffixes to add to p a rt n u m b e r remote on/off positive - standard, -p suffix neg a tive-sta ndard, -n suffix 0.180?- stan da rd, add ?ca? su ffix 0.145?- ad d ?c b? suffix pin le ngth 0.110?- ad d ?c c? suffix parall el ing opti on parallelin g ad d ?p? suffix (standard) rohs a d d to part number rohs l ead so l der exempt 1 no roh s char acter requ ired. rohs com p li a n t for all si x su bstanc es add "g" as the last character of the part num ber. 1 the solder exe m ption refers to all the re stricted materials except lead in solder. 2 example: qts w i th ne gative logic, 0.180 pin and para lleling the re sulting part numb e r is qts48 t 460 96-ncap notes : 1. nuclear an d medical appli c ations - po wer- 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. techni cal 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 manuf a c tured. specifications are subject to change w i thou t notice. z d -020 76 rev 2.1 page 7 of 7 w w w . pow er-one.com
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