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yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet m e mbe r of the family applica t ions ? low voltag e, high de nsity systems with intermedi ate bus architect u re s (iba) ? point-of-lo ad regul ators for high perfo rm ance dsp, fpga, asic, and micro p rocesso r s ? de skto p s, servers, and p o rt able computi ng ? broad ban d, networkin g, op tical, and comm uni cat i ons sy st em s bene fits ? one pa rt that covers ma ny appli c ation s ? red u ces b o a r d sp ace, system co st and c o mplexity, a nd time to mark et features ? ro hs lead free and le ad -solde r-exe mpt pro d u c ts are available ? high effici en cy multiphase synchro nou s buck topology ? low n o ise fixed frequ en cy operation ? wide in put voltage ran ge: 5 v ?13.8v ? high contin uo us outp u t current: 50a ? programma bl e output voltage ran ge: 0.6 v ?3.63v ? overcurrent, output overvo ltage, and ov ertemp eratu r e prote c tion s wi th automatic restart ? remote diffe rential output voltage se nse ? powe r goo d sign al ? enable inp u t ? start up into prebi ased loa d ? no minim u m load re qui rem ents ? high mtbf o f 41.8 mhrs ? industry stan dard size thro ugh-hole sing le-in - line packa ge an d pinout ? 1.45?x0.72 5 ? (36.83 mm x 18.41mm) ? low h e ight of 1.115? (28.3 2 mm) ? wide o perating tempe r atu r e ra nge: 0 to 70oc ? ul94 v-0 flammability rating ? ul6 095 0, csa c22.2 no. 6095 0-0 0 , an d tuv en609 50 -1:2 001 des c ription the yv09 t 5 0 -0 non -i sola ted dc-dc p o int of lo ad (pol) co nvert e r d e livers u p to 5 0 a of output curre n t in an indu stry-stan dard si ngle - in -line (sip) through -hol e pa ckage. t he yv09t50 -0 p o l conve r ter is an ideal ch oice fo r intermedi ate bus archite c t u re s whe r e p o in t of loa d conversion is a re quireme n t. operating f r om a 5.0 - 13. 8v input the pol con v erter p r ovid es a n extrem ely tightly reg u la ted p r og ra mmable outp u t voltage of 0.6 v to 3.63 v. the pol co nverte rs offer ex cep t ional therm a l performan ce , even in high temperatu r e environ ment with minimal airflow. this pe rform ance is a c co mplish ed through the u s e of advanced circuit sol u tions, pa ckaging a nd proce s sing techni que s. the re sultin g desi gn po sse s ses ult r a-hig h efficien cy, excelle nt thermal mana ge ment, and a slim body profile that m i nimize s imp edan ce to system ai rflow, thus en han cing co oli ng f o r both up stream an d do wn strea m device s . th e u s e of a u tomation for assembly, co upled with a d vanced po wer ele c troni cs and the r mal de sign, results in a product with extremely high reliability. zd-02 078 rev 1 . 0 w w w .po w er-one.com page 1 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet 1. ordering information y v 0 9 t 5 0 ? 0 z produc t family profile inpu t vo ltag e pcb mount ing outp ut current dash on/off l ogic rohs compliance pol conv erter vertical 5v to 13.8v t h rough- hol e 50a p o s i ti v e logic no suffix - rohs compli ant w i t h pb sol der exempti o n 1 g - rohs complia nt for all si x substanc es ______ ____ ____ __ ______ ____ ____ __ ______ 1 the solder e x e m ption refers to all the restricted materials exc ept lead in solder. t hese materials ar e cadmium (c d), hexavalen t chro mium (cr6+), mercury (hg), pol y b r omin ated biphen y l s (pbb), pol y bromi nated diphen y l e t hers (pbde), an d lead (pb ) used an yw h e re e x cep t in solder. example: yv09t50 -0 g : yv09t50 -0 po l conve r ter with positive o n /off logi c and lea d -free solde r . 2. absolu te ma ximum ratin g s stresse s in e x cess of the absolute max i mum ratin g s ma y cau s e perfo rman ce degradatio n, adversely affect long - term relia bility, and cau s e perm ane nt damage to the conve r ter. para mete r condit i ons/description min max units input volta ge conti nuo us -0.3 15 vdc ambie n t t e mp erature r a n g e operatin g 0 70 c storage t e mperature (t s) -55 125 c 3. en v i ronmental and mech anical specifications para mete r condit i ons/description min nom max units w e ight 25 grams mt b f calcu l ate d per t e lcordi a t e chno log i es sr- 332 method i case 1 50% e l ectrica l stress, 40c a m bie n t 41.8 mhrs lea d plati ng yv09t 50-0 an d yv09t 50-0g 100 % matte t i n zd-02 078 rev 1 . 0 w w w .po w er-one.com page 2 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet 4. electrical sp ecifica tions specification s a pply at the input volta g e from 5v to 1 3 .8 v, output l oad f r om 0 to 50a, o u tput voltage from 0.6v to 3.63v, 470f external outp u t capa citor, and ambi ent temp e r ature from 0c to 7 0 c unl ess oth e rwi s e n o ted. 4.1 input specifi cation s para mete r condit i ons/description min nom max units input volta ge ( v in ) v out 0.55 *v in 5 12 13.8 vdc und e rvolta ge l o ckout t u rn-on t h reshol d input volta ge rampi ng u p 4.25 4.5 4.75 vdc und e rvolta ge l o ckout t u rn-off t h re shold input volta ge rampi ng d o w n 3.75 4.0 4.25 vdc standb y in put current v in = 12v, pol is disab l ed vi a on/of f 16 madc maximum input current v in =6 v, v out =3. 3 v 32 adc input reflect e d rippl e curr ent peak-to-pe ak bw=5mhz to 20mhz, l s o urce = 1h, see f i gur e 19 for setup 60 ma 4.2 outpu t spec ifications para mete r condit i ons/description min nom max units output voltag e rang e (v out ) programm abl e w i th a resistor bet w e en t r im+ and t r im- pins 0.6 3.63 vdc output voltag e setpoint accur a c y , v out 1v v in = 12v, i out =i out m a x , 0.1% trim resis t or, room temperature -0.8 0.8 %v out output voltag e setpoint accur a c y , v out <1 v v in = 12v, i out =i out m a x , 0.1% trim resis t or, room temperature -8 8 mvdc l i ne r e gu la ti on , v out 2.5v v in m i n to v in m a x 0.3 %v out loa d re gul atio n, v out 2.5v 0 to i out m a x 0.6 %v out l i ne r e gu la ti on , v out <2 .5 v v in m i n to v in m a x 9 mvdc loa d re gul atio n, v out <2 .5 v 0 to i out m a x 12 mvdc output voltag e regu latio n over operati n g input volta ge, resistive loa d , and temp erature co nd itions unti l the end of life -1.1 1.1 %v out output voltag e peak-to-peak ripp l e a nd n o i s e, bw = 20mhz, f u ll lo ad v in = 12v, v out =0 .6 v v in = 12v, v out =2 .5 v v in = 12v, v out =3 .3 v 15 20 25 30 40 50 mv mv mv dy n a m i c re gu la ti o n peak dev i atio n settling t i me v in = 12v, v out =3 .3 v 50 - 100 % lo ad step, sle w r a te 10a/ s, to 10% of pe ak deviati on 130 80 mv s efficiency v in = 12v f u ll lo ad room temp era t ure v out =0 .6 v v out =1 .2 v v out =2 .5 v v out =3 .3 v 72.8 83.4 90.5 92.3 % % % % output current (i out ) v in m i n to v in m a x 0 50 adc zd-02 078 rev 1 . 0 w w w .po w er-one.com page 3 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet para mete r condit i ons/description min nom max units t u rn-on delay t i me 1 pol is enabl e d on/of f pin is pull ed h i g h fro m v in =v in m i n to v out =0 .1 * v o u t . set 0.5 1 ms t u rn-on delay t i me 1 pol is disab le d v in = 12v f r om on/off pin ch an gin g its state from lo w to hig h until v out =0 .1 * v out . se t 0.5 1 ms rise t i me 1 c out = 0 f , resistive lo ad fro m v out =0 .1 * v out . se t to v out =0 .9 * v out . se t 1.4 3 ms admissib l e out put cap a cita nc e v out 2.5v i out =i out m a x , resistive load, esr>2.5m ? 5,000 f admissib l e out put cap a cita nc e v out 2.5v i out =i out m a x , resistive load, esr>2.5m ? 2,200 f s w itc h i ng f r eq uenc y 2 phas es comb ine d 900 khz ____ ____ ___ ____ ____ ___ ____ 1 total start- up time is the sum of the turn -on dela y time and the rise time 4.3 protec tion specifica tions para mete r condit i ons/description min nom max units outp ut o v e r curre nt prote c t ion t y pe auto-restart inceptio n poi n t 55 65 75 a output short circuit current (rms value) v out =2.5v, r out <0 .0 1 ? 5.5 a autorestart per i od after i out drop s belo w ince pti on po int 10 ms ou tpu t o v er v o ltag e pro t ectio n t y pe auto-restart t h reshold i out =i out m a x , room temper atu r e 120 125 130 %v o.se t autorestart per i od after v out drops belo w thr e sh old vo ltag e 0 ms o v e r te mp erat u r e pro t ectio n t y pe auto-restart t u rn off t h reshol d t e mperature is increas ing 130 c t u rn on t h reshol d t e mperature is decreas ing after the pol w a s shut do w n b y ot p 120 c autorestart per i od after temperature dro p s be lo w turn- on thres hol d 3 s po w e r goo d signa l (p w r g ood pi n) log ic v out is insid e the pg w i nd o w v out is outside the pg w i n d o w high lo w n/a lo w output vo ltage i sin k =4 ma 0.5 vdc high outp ut voltag e ex te rn a l pu l l - up 2.4 5.25 vdc zd-02 078 rev 1 . 0 w w w .po w er-one.com page 4 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet 4.4 feature spe c ification s para mete r condit i ons/description min nom max units ena b le (on/o ff p i n) on/of f logic positive (e nab l e s the outp u t w hen on/of f pin is ope n) n/a on/of f high input volta ge pol is on 2.4 v in.m ax vdc on/of f high input curr ent pol is on 0.5 madc on/of f lo w i nput volta ge pol is off -0.3 1.2 vdc on/of f lo w i nput curr ent pol is off 0.12 adc remote voltage sense (+vs and ?vs pins) voltag e dro p comp ensati o n 1 500 mv 1 the out put voltage measured dir e ctly be t w een vo ut and gnd pins shall never exceed 3.63v zd-02 078 rev 1 . 0 w w w .po w er-one.com page 5 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet 5. t y pical performance ch arac teris t ics 5.1 efficiency curv es 50 55 60 65 70 75 80 85 0 1 0 2 03 0 4 05 o u t put c u r r e nt , a e f f i ci en cy , % 0 vi n = 5 v v i n = 12v v i n = 13. 8v figure 1. effi ci enc y v s . loa d. vout=0.6v 65 70 75 80 85 90 0 1 02 0 3 04 05 o u t put c u r r e n t , a e f f i ci en cy , % 0 vi n = 1 0 v vi n = 1 2 v v i n = 13. 8v figure 2. effi ci enc y v s . loa d. vout=1.2v 75 80 85 90 95 0 1 02 0 3 04 0 o u tp u t c u rr e n t, a e f f i ci enc y , % 5 0 v i n = 10v vi n = 1 2 v v i n = 13. 8 v figure 3. effi ci enc y v s . loa d. vout=2.5 80 85 90 95 0 1 02 0 3 04 0 o u tp u t c u rre n t , a e ffi c i e n c y , % 5 0 v i n = 10v v i n = 12v vi n = 1 3 . 8 v figure 4. effi ci enc y v s . loa d. vout=3.3v zd-02 078 rev 1 . 0 w w w .po w er-one.com page 6 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet 5.2 turn-on ch a r acteristic s figure 5. t y pical s t art - up using rem o te on/ o f f (vo = 1.2 vd c, i o =50 a ) . ch1 ? vout, ch2 ? on/ o f f figure 6. t y pical s t art - up using rem o te on/ o f f (vo = 3.3 vd c, i o =50 a ) . ch1 ? vout, ch2 ? on/ o f f figure 7. t y pical s t art - up w i th applicat io n of vi n (vo = 1.2vd c , io = 50 a ) . c h 1 ? vout, ch2 ? vi n figure 8. t y pical s t art - up w i th applicat io n of vi n (vo = 3.3vd c , io = 50 a ) . c h 1 ? vout, ch2 ? vi n zd-02 078 rev 1 . 0 w w w .po w er-one.com page 7 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet 5.3 transien t re spons e figure 9. transie n t r esp onse to d y n a mi c loa d ch ang e from 5 0 % to 10 0 % of full l o a d (v in=12v, vo=0.6vdc). ch 3 ? iou t figure 10. transie n t r esp onse to d y n a mi c loa d ch ang e from 5 0 % to 10 0 % of full l o a d (v in=12v, vo=3.3vdc). ch 3 ? iou t 5.4 dera ting cur v es 25 30 35 40 45 50 2 0 30 4 0 50 60 7 0 a m b i en t t e m p er at ur e, c lo ad c u rr e n t , a nc 100 lf m ( 0 . 5 m / s ) 200 lf m ( 1 m / s ) 300 lf m ( 1 . 5 m / s ) 400 lf m ( 2 m / s ) figure 11 ou tpu t c u rrent v e rs us l o cal a m bie n t tem p erat ure an d a i rfl o w (vin = 12.0 vdc, vo=0.6vdc) 25 30 35 40 45 50 2 0 30 4 0 50 60 7 0 a m b i en t t e m p er at ur e, c lo ad c u rr e n t , a nc 100 lf m ( 0 . 5 m / s ) 200 lf m ( 1 m / s ) 300 lf m ( 1 . 5 m / s ) 400 lf m ( 2 m / s ) figure 12. ou tpu t c u rrent v e rs us l o cal a m bie n t tem p erat ure an d a i rfl o w (vin = 12.0 vdc, vo=1.2vdc). zd-02 078 rev 1 . 0 w w w .po w er-one.com page 8 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet 25 30 35 40 45 50 2 0 30 4 0 50 60 7 0 a m b i en t t e m p er at ur e, c lo ad c u rr e n t , a nc 100 lf m ( 0 . 5 m / s ) 200 lf m ( 1 m / s ) 300 lf m ( 1 . 5 m / s ) 400 lf m ( 2 m / s ) figure 13 ou tpu t c u rrent v e rs us l o cal a m bie n t tem p erat ure an d a i rfl o w (vin = 12.0 vdc, vo=1.8vdc). 25 30 35 40 45 50 2 0 30 4 0 50 60 7 0 a m b i en t t e m p er at ur e, c lo ad c u rr e n t , a nc 100 lf m ( 0 . 5 m / s ) 200 lf m ( 1 m / s ) 300 lf m ( 1 . 5 m / s ) 400 lf m ( 2 m / s ) figure 14. ou tpu t c u rrent v e rs us l o cal a m bie n t tem p erat ure an d a i rfl o w (vin = 12.0 vdc, vo=2.5vdc). 25 30 35 40 45 50 2 0 30 4 0 50 60 7 0 a m b i en t t e m p er at ur e, c lo ad c u rr e n t , a nc 100 lf m ( 0 . 5 m / s ) 200 lf m ( 1 m / s ) 300 lf m ( 1 . 5 m / s ) 400 lf m ( 2 m / s ) figure 15. ou tpu t c u rrent v e rs us l o cal a m bie n t tem p erat ure an d a i rfl o w (vin = 12.0 vdc, vo=3.3vdc). 6. applica t ion informa t ion 6.1 input and o u tpu t imped a nce the pol co nverter sh oul d be con n e c ted to the dc power sou r ce via low impeda nce. in many appli c ation s , the indu cta n ce asso ciat ed with th e distrib u tion from the po we r so urce to th e input of the converter can affect the st ability of th e converter. internally, the conve r ter inclu d e s 60 f (low esr cerami cs) of input ca pa cit ance whi c h e liminates th e need fo r external inp u t ca p a citan c e. ho wever, if the distrib u tion of the input voltage to the pol co nverte r contai ns hi gh inducta nce, it is recomme nded to ad d a 15 0 f de couplin g cap a c itor pla c e d as clo s e a s possibl e to t he conve r ter input pi ns. a low-esr tantalum o r pos ca pa citor con n e c ted acro ss the input pin s help e n surin g stability of the pol conve r ter a n d redu ce inp u t ripple voltag e . a 470 f po s, tantalum, or ce rami c o u tput capa cit o r is recomme nded to i m prove o u tput ripple and dynamic re sp onse. it is importa nt to keep low re si stan ce an d low indu ctan ce of pcb traces for co nne ctin g load to th e output pin s of the converte r in order to m a intain g ood load re gulatio n. 6.2 outpu t volta g e program ming the o u tput v o ltage can be pro g ra mmed from 0.6v to 3.63v by conne cting a n extern al resi stor r tr i m betwe en t r i m + pin (pin 8) an d tri m - pin (pin 7 ) , a s sho w n in fig u re 16. figure 16. pro g r ammi ng ou tp u t volta g e wit h a resist or the trim resi stor r tr i m for a desi r ed o u tput voltage can b e cal c ul ated usi ng th e followin g eq uation: , 6 . 0 2 . 1 ? = out trim v r k ? vi n vin gnd on/off vou t pow e r good tr i m + sen se + rl oa d gnd tr i m - sen se- r tr i m 4, 5 12 , 13 1 ,2 , 3 6 9 8 11 4 ,5 7 10 yv09t50 zd-02 078 rev 1 . 0 w w w .po w er-one.com page 9 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet whe r e: r tr i m = requi red value of trim resi stor in k ? v out = de sire d (trimme d) v a lue of output voltage v if the r tr i m is not use d an d the sense+ and sen s e - pins are sho r t ed to v o ut and gnd re spectively, the output voltag e of th e po l conve r ter will be 0.6v. no cap a cito r is al lowe d betwee n trim + and trim- pi ns. note that the trim res i s t or toleran c e di rectly affects the output vo ltage accu ra cy. it is reco mmend ed to use 0.1% tri m re sisto r s t o meet the o u tput voltage setpoi nt accu racy spe c ified in p. 4.2. table 1. trim r esistor val u es v 0u t, v calcu l ated r trim , k ? sta nda rd va lue of 0.1 % re sisto r , k ? 0.6 open open 1.0 3 . 0 3 . 0 1 1.2 2 . 0 2 . 0 1.5 1 . 3 3 3 1 . 3 3 1.8 1 . 0 1 . 0 2.0 0 . 8 5 7 0 . 8 5 6 2.5 0 . 6 3 1 0 . 6 3 4 3.3 0 . 4 4 4 0 . 4 4 2 3.63 0 . 3 9 6 0 . 3 9 7 6.3 on/off (pin 6) the on/o ff pin i s u s ed to turn the p o l conve r ter on or of f rem o tely by a sig nal f r o m a syste m controlle r. for po sitive lo gic, the po l conve r ter i s on when th e on/off pi n is at a logic high (2.4v min) or l e ft o pen. th e p o l conve r ter is off wh e n the on/ o ff pin i s at a logic low (1.2v max) o r c o nn ec te d to g n d . the typical conne ction s are sho w n in fi gure 1 7 . figure 17. circ uit c onf igura t io n for on/ o f f f uncti on internal 50 k ? pull-up to 5v s u p p l y . i t i s recomme nde d to control the on/off pin with an open colle cto r tran sisto r or similar d e vice. 6.4 remote sen se (pins 10 a nd 11) the o n /of f pin is re feren c ed to grou nd an d typically ha s 50k ? i nput impeda nce. it has an s for th e o f t h e po l t o t h e vo ut an d g n d pin s o te se nse circ u u r a t i o n be c a u r r e n t, r g e tra c e s on the e nd-u s er b oard a r e not req u ired. i n o r d e r to ) is an op en drain o u tput , a. the po wer go od pin voltage dro p s below a pre determi ned voltage. it will the remote sen s e feat ure com pen sate voltage d r op between th e outp u t pin s conve r ter an d the lo ad. the sen s e - (pin 10 ) a n d sense + (pin 11) pin s sh ould b e con necte d at th e load or at the point wh ere regulatio n is req u ire d (refer to figure 18). if remote se nsin g is not requi re d, the sense pin s must be co n necte d dire ctly at the output of the pol co nverte r. figure 1 8 vi n . r e m i t co n f i g s e the s e ns e le ads c a r r y min i ma l c u l a the voltage sense traces should be lo ca ted clo s e to a grou nd pla n e to minimize system noi se . whe n u s in g remote sen s e, the o u tput v o ltage at the conve r ter can be increa se d b y u p t o 0 . 5 v maintain th e requi re d volta ge at th e loa d . however, the maximu m output voltage me asured dire ctly betwe en th e vout and g n d pin s sh all not ex cee d 3.63v. in addition it is t he user?s responsi bility to ensure th e pol co nvert e r?s actu al output po we r alway s rem a ins at or bel o w the maxim u m allowable output po wer obtaine d from the derating curve s . 6.5 protec tions 6.5.1 po w e r goo d powe r goo d pin (pin 9 cap able of si nkin g up to 4 m is hig h whe n the outp u t voltage is within the regul ation ba nd. the power goo d pin i s at logic lo w durin g start - up, u nde rvol tage, ove r v o l t a g e , o r overcurrent condition s, or whe n the po l co nverte r is disa bled via the on/o ff signal. 6.5.2 input un der v o l tage lock out the pol converter will s hut down when the input vi n cont r o l input v i n gnd on vou t yv09t50 pow e r good tr i m + sen se + rl oa d gnd tr i m - sen se - 4 , 5 12 , 13 1, 2 , 3 6 9 8 11 4 ,5 7 10 vin gnd o n / o f f vou t pow e r g o o d tr i m + sen se + rl oa d gnd tr i m - sen se - rw rw 4, ,5 7 5 12 , 13 1 ,2 , 3 11 yv09t50 6 9 8 4 10 zd-02 078 rev 1 . 0 w w w .po w er-one.com page 10 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet start a m a t ically whe n t he in put volt a u t o g e exce ed s n s. upon sen s in g an will shut s n o m i n a l v a l u e . r tha n erat ure con d itio n to protect itself from t h e r m a l e a n d i n p u t r e f l ected ri ppl e curre n t wav e form s a r e measured u s ing th e te st p figure 19. te st setup for me as uring i n p u t r e fl ected -rip ple current a nd o u t p ut vo lt a g e r i pp l e o m input to output. the input device s p o w e 0 9 t m u st provide rele vant isolation requi rem e n t a ng to all iec6 0 a s t a s . n e v le ss, if the system using the conve r ter ne eds to ceiv e safety a g e n cy ap proval, e r t ai n rule s must b e f o llo wed in t h e d e sig n of t h e y s t e m . i n particular, all of the creep age and c requi rem e n t s t h e s e r e i n clu ded in ul6 095 0 - csa60 950 - 8. safety the yv09t 5 0 -0 po l co nverters do not pr ov id e i s o l a t i the spe c ified threshold. 6.5.3 outpu t ov ercurren t protection the pol co nverter i s p r o t ected a gain s t overcurrent and sh ort ci rcuit conditio overcurrent condition, th e pol co n v e r t e r down. once the converte r has shut down, it will attempt to res t art nomina lly every 1 0 ms with a typical 2% duty cycle. the attempte d resta r t will contin ue in de finitely until the ove r loa d or sho r t circui t con d ition is removed. whe n the o v erload or sho r t circuit conditio n is removed, the pol converter will autom atically restart and vout will r e t u r n t o i t 6.5.4 outpu t ov erv o ltage protection the po l con v erter i s p r ot ected ag ainst overvoltag e on the outpu t. if the output voltage is highe 125% of its n o minal value set by the r tri m , the high side mosfe t s will be i mmediately t u rned off and the lo w si de mosfets wi ll be tu rne d o n . the po l conve r ter will rem a in i n t he state u n til the o u tput voltage re du ces b e lo w 12 0 % of its nomi nal value. at that point t he pol co nverter will automati c al l y res t art. 6.5.5 ov ertemperature pro t ec tion t h e p o l c o n v e r t e r will shut do wn under a n overtemp overhe ating caused by ope ra tion out side t h e deratin g curv es, or ope rati on in ab no rm al co ndition s su ch a s syst em fan failure. after the pol co nvert e r has co oled t o a safe o p e rating temp eratu r e, it wil l automatically resta r t. 7. char acteriza t ion 7.1 r i p p l e a n d n o i s the output voltage rip p l e s e t u sho w n i n f i g u r e 1 9 . o n f r r i n g y v 5 0 - 0 s c c o r d i 9 5 0 b se d n d a r d e r t h e re c s l e a ran c e requireme nts of the end-u s e safe t y m u s t b e ob serve d . requi rem e n t s a 00 an d en60 9 5 0 , a l t h o ugh spe c ific ap plication s m a y have other o r additional re quire ment s. the yv09t5 0 -0 pol co nverters hav e no internal fuse. if required, the ex ternal fuse n eed s to be provide d to prote c t the converte r fro m cat a stroph i c failure. refer to the ?input fuse s e le ctio n for dc/dc conve r ters? a pplication not e on ww w.po wer - o ne.c o m for prope r selectio n of the input fu se. both inp u t trace s an d the cha s sis g r oun d trace (if applicabl e) must be ca pa ble of condu cting a current of 1.5 times the value of the fuse witho u t openin g . to comply with safety agen cie s ? re quire ment s , a recogni ze d fu se m u st b e u s ed i n seri e s with the in put erter to be line. the fuse must n o t be placed in t he groun de d input line. abnorm a l a n d compo nent failure test s were cond ucted with the pol input prote c ted b y three 15a/12 5 vdc fu se s con n e c ted in parallel. if fuse s rated greate r th an 15a a r e u s ed, ad ditiona l testing may b e requi re d. the maximu m dc volta g e between a n y two pin s i s vin und er all ope rating co ndition s. in orde r fo r th e output of th e yv09t5 0 -0 pol co n v con s id ere d a s selv (s afety extra lo w voltag e), according to all iec609 50 based stand a r ds, the i nput to the pol need s to be suppli ed by an isolate d se con dary so urce providin g a selv also. i s v out v sour ce 470 f capacit o r 1 . 0 h sour ce i nduct ance c in 100 f tant al um + 47 f ceram i c capaci t o r yv09t50 zd-02 078 rev 1 . 0 w w w .po w er-one.com page 11 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet 9. pin assignm ents a nd de scription pin nam e pin number pin ty pe buffer ty pe pin descrip tio n no tes vout 1, 2, 3 p output voltag e g n d 4 , 5 p po w e r grou nd on/of f 6 i pu enab le pull h i gh or l e a v e floatin g to turn on the pol t r i m - 7 i / o a output v o l t a g e t r i m con nect a hi gh accurac y resis t or bet w e e n t r i m + and t r im- pins to set the outp u t voltage t r im + 8 i a output v o l t a g e t r i m con nect a hi gh accurac y resis t or bet w e e n t r i m + and t r im- pins to set the outp u t voltage pw r g o o d 9 i / o p u po w e r g o o d open dra i n p i n indic a ting stat us of the outpu t voltag e sense- 10 i a neg a tive volt a ge sens e con nect to the neg ative p o int close to the l o a d sense+ 11 i a positive vo ltag e sense con nec t to the positiv e poi nt close to the l oad vin 12, 13 p input volta ge 14, 15 mecha n ica l su pport con necte d to gnd insid e of the pol conv er ter legend: i=input, o=outpu t, i/o=input/outp u t, p=po w e r, a= analog, pu=inter nal pull-up zd-02 078 rev 1 . 0 w w w .po w er-one.com page 12 of 13
yv09t50 50a dc-dc pol converter 5v to 13.8v input ? 0.6v to 3.63v output data sheet 10. mecha n ical dra w i n gs a l l dime nsi ons are in inc h es tolera n ces: x.xx: 0.02? x.xxx: 0.01? figure 20. mec h anical dra w ing figure 21. rec o mme nde d f oot print ? to p vie w 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 manuf a c tured. specifications are subject to change w i thou t notice. zd-02 078 rev 1 . 0 w w w .po w er-one.com page 13 of 13

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