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delphi nc30 series non-isolated point of load dc/dc power modules: 12v i n, 0.9v -5v out, 30a the delp hi nc30 seri es, 1 2 v input, single output, non-isol ated poin t of load dc/dc conve r ters a r e the latest o f fering from a worl d lead er in power sy ste m s technolo g y and man u facturi ng D delt a ele c tronics, inc. the nc3 0 se rie s ope rates fro m a 1 2 v nominal i nput, provid e s up to 30a of p o we r in a vertical o r ho rizo nt al mou n ted throug h - hole p a ckage a n d the output can b e re sistor- or volt a ge-trim med f r om 0.9vdc to 5.0 v dc. nc30 serie s ha s buil t -in cu rrent sharin g co ntrol and multiple nc3 0 /nc40 serie s modul es could be p a ral l eled togethe r to provide eve n highe r output current s. nc30 se rie s pro v ides a very co st ef fective poin t of load solu tion. with cre a tive design techn o logy a nd optimizatio n of compon e n t placem e n t, these co n v erters possess out st andi ng e l ectri c al a nd therm a l pe rformance, as well as extre m ely high reli ability under hi ghly stre ssful ope rating co nditio n s. optio n s v e rtical or horizont al versions negative on/ o f f logic applica t i o ns dat a com distributed po w e r architectures servers and w o r kst ations lan/w a n applications dat a processing applications featur es high ef ficiency : 94% @ 1 2 v i n, 5v/30a out v o lt age and resistor-based t r im no minimum load required output volt age pr ogrammable f r o m 0.9vdc to 5.0vdc via external resi stors fixed f r equenc y operation input uvl o , out put ovp , otp , ocp , scp remote on/ o f f (default: positive) power goo d outp u t signal output volt age s ense iso 9001, t l 90 00, iso 14 001, qs 9000, ohsas 1800 1 certified manufact u ring facility ul/cul 60950 ( u s & canada ) r e cognized, and tuv (en 609 50) ce rtified ce mark meet s 73/23/eec and 9 3 /68/eec directives d a t a s h eet d s _ n c1 2 s 3 0 a _020 72 00 7
ds_nc1 2s3 0 a_020 720 0 7 2 technical specifica t i o ns (t a =25 c, airfl o w rate=400lfm, v in =12vdc, n o m inal v o u t u n le ss ot her w ise no ted.) pa r a m e t e r notes an d conditions n c 1 2s 0a0v 30 min . t y p . ma x . u n it s a b solute m a xi mu m ra tings inpu t v o lt ag e 14 vdc operati ng t e mpera t ure 0 50 c s t orage t e mperatu r e refer to figure 36 for the mea s urin g p o int -40 125 c inpu t/ou t pu t isola t i on v o lt age non-isola t ed na v i n p u t c h ar ac t e r i s t i c s operati ng inpu t v o l t age 10.2 12 13.8 v inpu t under -v ol t a g e lo cko ut t u rn-on v o l t age th reshold 9.0 v t u rn-o f f v o lt age th reshold 8.3 v lockout hy stere s is v o lt age 0.7 v max i mu m inpu t cur r ent 100% lo ad, 10 .2v i n, 5 v ou t 15.6 a no-load inpu t curr ent 160 ma of f conv erter inpu t current 10 ma inpu t re flected-rip p le curren t r e fer to f i gure 35 150 ma inpu t v o lt ag e rippl e rejection 120 hz 55 db output ch a r a c teri sti c s outpu t v o lt age adj u stmen t range 0.9 5.0 v outpu t v o lt age set point v i n=12v , io= i o , max, t a =25 , 1% trim resi sto r s - 3 . 0 + 3 . 0 % outpu t v o lt age reg u lation ov er load io=io , min to io ,max -1.0 +1.0 % ov er line vi n = vi n , m i n t o vi n , m a x -0.2 +0. 2 % outpu t v o lt age rip p le and noise 5hz to 20mhz ban dw id th peak- t o-pe ak full load , 1f cer a mic, 10f t a nt alum 50 mv rms full load , 1f cer a mic, 10f t a nt alum 15 mv outpu t cur r ent ran ge 0 30 a outpu t v o lt age ov e r-shoo t at s t ar t-up v i n=12v , t u rn on 1 % outpu t v o lt age und e r-shoo t at pow e r-of f v i n=12v , t u rn off 100 mv outpu t dc cur r ent- l imit in ception 36 a outpu t shor t-circu i t curre nt (hiccup m ode) 36 a dyn a m i c ch a r a c teri sti c s out dy namic load respon se 12v in, 10f t a n & 1f ceramic load cap, 10a/ s posi tiv e s t ep chan ge in ou tput curre nt 50% io,m ax to 75% io ,m ax 75 mv negativ e s t ep cha nge in ou tpu t curr ent 75% io,m ax to 50% io ,m ax 75 mv setting t i me settling to be w i thin regula t ion band (+/- 3.0%) 150 s t u rn-on t r an sien t io= i o . m a x s t art - up t i me, from on/of f cont rol v i n=12v , v o =1 0% of v o ,se t , t a =25 10 ms s t art-u p t i m e , f r o m inpu t v o =10% of v o ,se t , t a =25 30 ms minimum output s t artup cap a ci tiv e load ex : t w o oscon 6.3v/680f (esr 13 m max each) 1360 max i mu m outpu t s t artup cap a ci tiv e l oad full load ; e s r R 10 m ? 5440 f minimum inpu t cap a cit a n c e ex : oscon 16v /2 70f (esr 18m max ) 2 7 0 f effi ci ency vo = 0 . 9 v v i n=12v , io=30 a 78 % vo = 1 . 2 v v i n=12v , io=30 a 82 % vo = 1 . 5 v v i n=12v , io=30 a 85 % vo = 1 . 8 v v i n=12v , io=30 a 87 % vo = 2 . 5 v v i n=12v , io=30 a 90 % vo = 3 . 3 v v i n=12v , io=30 a 92 % vo = 5 . 0 v v i n=12v , io=30 a 94 % fe a t ure ch a r acteri s ti cs sw itching freq uen cy 300 khz on/off control posi tiv e logic (in t er nally pulled high) logic high module on (or leav e th e pin open ) 2.4 vi n , m a x v logic low module o f f -0.2 0.8 v remote se nse ran ge 0.4 v genera l specifica t ions mtbf 1.69 m hour s we i g ht 36 grams ov er-t emperature shut dow n auto re st ar t, re fer t o f i g. 36&41 for th e measuring poin t 130 c
ds_nc1 2s3 0 a_020 720 0 7 3 electri cal characteristi cs cur ves 0 10 20 30 40 50 60 70 80 90 10 0 0 2 4 6 8 1 0 12 14 1 6 1 8 20 22 24 2 6 28 30 o u t p ut c u r r e nt ( a ) e f f i ci e n cy ( % ) 10. 2 12 13 . 8 0 10 20 30 40 50 60 70 80 90 10 0 0 2 4 6 8 1 01 21 4 1 61 82 02 22 4 2 6 2 83 0 o u t put c u r r ent ( a ) ef f i c i e n c y (% ) 10 . 2 12 13 . 8 figure 1 : converter ef ficie n c y vs. output current (0.9v outp u t volt age) figure 2 : converter ef ficie n c y vs. output current (1.2v outp u t volt age) 0 10 20 30 40 50 60 70 80 90 10 0 0 2 4 6 8 1 01 21 4 1 61 82 02 22 4 2 6 2 83 0 o u t put c u r r ent ( a ) e f f i ci e n cy ( % ) 10 . 2 12 13 . 8 0 10 20 30 40 50 60 70 80 90 100 0 2 4 6 8 1 0 1 2 1 4 16 18 20 22 24 26 28 3 0 o u t put c u r r ent ( a ) e f f i ci e n c y ( % ) 10. 2 12 13. 8 figure 3 : converter ef ficie n c y vs. output current (1.5v outp u t volt age) figure 4 : converter ef ficie n c y vs. output current (1.8v outp u t volt age) 0 10 20 30 40 50 60 70 80 90 10 0 0 2 4 6 8 1 01 21 4 1 61 82 02 22 4 2 6 2 83 0 o u t p u t c u rre n t (a ) e f f i ci e n cy ( % ) 10 . 2 12 13 . 8 0 10 20 30 40 50 60 70 80 90 100 0 2 4 6 8 1 01 2 1 4 1 6 1 82 0 2 22 4 2 62 83 0 o u t p ut c u r r ent ( a ) e f f i ci e n cy ( % ) 10. 2 12 13. 8 figure 5 : converter ef ficie n c y vs. output current (2.5v outp u t volt age) figure 6 : converter ef ficie n c y vs. output current (3.3v outp u t volt age)
ds_nc1 2s3 0 a_020 720 0 7 4 electri cal characteristi cs cur ves (con.) 0 20 40 60 80 10 0 12 0 0 2 4 6 8 1 01 21 4 1 61 82 02 22 4 2 62 83 0 o u t put c u r r ent ( a ) e f f i ci e n cy ( % ) 10 . 2 12 13 . 8 figure 7 : converter ef ficie n c y vs. output current (5.0v outp u t volt age) figure 8 : outp ut rippl e & nois e at 12v i n , 0.9 v /30a o u t figure 9 : outp ut rippl e & nois e at 12v i n , 1.2 v /30a o u t figure 1 0 : output ripp le & no i s e at 12v i n , 1.5v/30a out figure 1 1 : output ripp le & no i s e at 12v i n , 1.8v/30a out figure 1 2 : output ripp le & no i s e at 12v i n , 2.5v/30a out
ds_nc1 2s3 0 a_020 720 0 7 5 electri cal characteristi cs cur ves (con.) figure 1 3 : output ripp le & no i s e at 12v i n , 3.3v/30a out figure 1 4 : output ripp le & no i s e at 12v i n , 5.0v/30a out figure 1 5 : t u r n on delay tim e at v i n on/of f, 0.9v/30a out ch2:v i n ch 3:v out ch4:pw r g d figure 1 6 : t u rn on del ay time at remote on/of f, 0.9v/30a out ch2:enab le ch3:v out c h4: pw rgd figure 1 7 : t u rn on de lay ti me at 12vin, 5.0v/ 30a o u t ch2:v i n ch 3:v out ch4:pw r g d figure 1 8 : t u r n on delay tim e at remote on/of f, 5.0v/30a out ch2: enable ch3:v out c h4: pw rgd
ds_nc1 2s3 0 a_020 720 0 7 6 electri cal characteristi cs cur ves (con.) figure 1 9 : t y p i cal trans ient re spons e to step loa d cha nge at 10a/s from 7 5 % to 50% of io, max at 12 v i n, 1.2v out (cout = 1uf cera mic, 1 0 f t ant alu m ) figure 2 0 : t y p i cal trans ient re spons e to step loa d cha nge at 10a/s from 7 5 % to 50% of io, max at 12 v i n, 1.5v out (cout = 1uf cera mic, 1 0 f t ant alu m ) figure 2 1 : t y p i cal trans ient re spons e to step loa d cha nge at 10a/s from 7 5 % to 50% of io, max at 12 v i n, 1.8v out (cout = 1uf cera mic, 1 0 f t ant alu m ) figure 2 2 : t y p i cal trans ient re spons e to step loa d cha nge at 10a/s from 7 5 % to 50% of io, max at 12 v i n, 2.5v out (cout = 1uf cera mic, 1 0 f t ant alu m ) figure 2 3 : t y p i cal trans ient re spons e to step loa d cha nge at 10a/s from 7 5 % to 50% of io, max at 12 v i n, 3.3v out (cout = 1uf cera mic, 1 0 f t ant alu m ) figure 2 4 : t y p i cal trans ient re spons e to step loa d cha nge at 10a/s from 7 5 % to 50% of io, max at 12 v i n, 5.0v out (cout = 1uf cera mic, 1 0 f t ant alu m )
ds_nc1 2s3 0 a_020 720 0 7 7 fea t ures descriptions enabl e (on/off) the enable (on/of f) inp u t allows external ci rcuitry to put the nc conve r ter into a lo w power dissi p ation (sle ep) mode. positive (a ctive-high ) ena b le is availa ble as st an da rd. positive enable (active-high) u n it s of the nc se ri es are turned o n if the enable pin is high or floating. pulling the pin low will t u rn of f the unit. with the active high function, the output is guarante ed to turn on if the enable pin is driven above 2.4v . the o u tput will tu rn of f if the enable pin volt age i s pulled b e low . 8 v . the enable input can b e driven in a variety of ways as sho w n in fig u re s 26, 27 and 28. if the enable signal come s from the prima r y side of the circuit, the enable can be driven th rough eith er a bipolar sig n a l tran sisto r (figure 26) or a logi c gate (figu r e 27). if the e nable sig nal come s from the se conda ry si de, t hen a n opt o-coupl er or othe r isolatio n device s must b e use d to bring the signal a c ro s s the volt age isolation (pl e a s e see fig u re 28). nc30/n c 4 0 vout ground trim enable ground vin figure 2 6 : enabl e input driv e circuit for nc series nc30/nc 40 vout ground trim enable ground vin 5v figure 2 7 : enabl e inp u t drive circuit usin g lo gic gate. nc30/nc40 vo u t groun d tr i m enabl e groun d vi n figure 2 8 : enable i nput driv e circuit exa m ple w i th isolation. design considera t ions the nc30 i s de sign ed usin g two-ph ase synchro nou s buck topol ogy . block dia g ra m of the conv erter i s sh own in figure 25. t he output ca n be trimm e d in the ra n ge o f 0.9vdc to 5.0 v dc by a resi st or from trim pin to groun d. a remote sen s e function is provided a nd it is able to comp en sate for a d r o p from the o u tp ut of co nvert e r to point of load. the co nverte r can be turn ed on/off by remote co ntrol. positive on/ of f (enable pin) l ogic implies th at the conve r ter dc output is e n a b led when thi s si gnal i s d r i v en high (greater than 2.4v) or floating an d d i sabl ed when the sign al is driv en low (b elo w 0.8v). neg a tive on/of f l o g ic is optional a nd coul d also be orde red. the convert e r provides a n open coll e c tor sign al called powe r goo d . the power g ood si gnal i s pulled lo w whe n output is not within 1 0% of v out or enable is o f f . the conve r te r can p r ote c t it self by e n tering hi ccup m ode again s t over curre n t and short circuit co ndition. also, the conve r ter will shut do wn when an ove r volt age p r ote c tion is dete c ted. the conve r te r has an over te mperature prote c tion wh ich can p r ote c t it self by shutting do wn for an ove r temperature event. there is a thermal hystere s is o f typically 30 figure 2 5 : block diagr am safety con s iderations it is re comm ende d that th e user to pro v ide two 1 2 a very fast-a cting type fuse s (littl e fuse r4 51 012) in p a rall el in the input line for safety .
ds_nc1 2s3 0 a_020 720 0 7 8 s _ n c 1 2s3 0 a_020 720 0 7 8 fea t ures descriptions (con.) fea t ures descriptions (con.) input under-v olt age l ockout input under-v olt age l ockout the in put un der-volt a g e l o ckout p r eve n t s the c onverte r from being damag ed wh ile operatin g when the inpu t volt age i s to o lo w . the l o ckout o c curs betwe en 7.7 v to 8.6v . over-cu rre nt and short-circuit protection over-cu rre nt and short-circuit protection the nc seri es modul es have non-l a tchin g over-curren t and sho r t-circuit prote c tio n circuitry . when over cu rren t con d ition o ccurs, th e mo d u le go es into the no n-lat c hing hiccup mo d e . when t he over-current con d ition is remove d, the module will re sume n o rm al operation. a n over current conditio n is detected by measu r in g the volt age drop across the hi gh-side m o sfet . the volt age drop acro ss the mosf et is also a function o f the mosfet? s rds(on ). rd s(on) i s af fecte d by tempera t ure, therefore am bient temperature will af fect the current limi t ince ption poi nt. the unit will not be dama ged in an ove r cu rre nt con d ition because it will be protected by the over temperature prote c tion. the unit will not be dama ged in an ove r cu rre nt con d ition because it will be protected by the over temperature prote c tion. remote se nse remote se nse the nc30/ nc40 p r ovide v o remote se nsin g to achi eve prop er reg u la tion at the lo ad poi nt s an d red u ce ef fe ct s of distributio n losses o n o u t put line. in the event of an open remote sen s e line, th e module sha ll maint a in local sen s e re gul ation throug h an internal resi stor . the module shall co rre ct fo r a tot a l of 0.4v of loss. the r e mo te s e ns e c o n n e c t s as s h ow n in f i gu r e s 2 9 . over t e mp erature pro t ection (otp) over t e mp erature pro t ection (otp) t o provid e a dditional over-tempe ratu re prote c tion i n a fault con d itio n, the unit is equip ped wit h a no n-lat c h i ng thermal shut d o wn circuit. the sh ut do wn circuit eng ag es whe n the tem peratu r e of m onitore d com pone nt exce e d s approximatel y 130 . the unit will cycl e on and of f wh il e the fault co n d ition exist s . the unit wi ll recover f r om shut do wn when the cau s e of the o v er tempe r at ure con d ition is removed. t o provid e a dditional over-tempe ratu re prote c tion i n a fault con d itio n, the unit is equip ped wit h a no n-lat c h i ng thermal shut d o wn circuit. the sh ut do wn circuit eng ag es whe n the tem peratu r e of m onitore d com pone nt exce e d s approximatel y 130 . the unit will cycl e on and of f wh il e the fault co n d ition exist s . the unit wi ll recover f r om shut do wn when the cau s e of the o v er tempe r at ure con d ition is removed. over v o lt ag e protection (ovp) over v o lt ag e protection (ovp) the converte r will shut do wn when an output over v o lt ag e is detected. once the ovp condition is detected, the controlle r will stop all pwm output s and will turn on low-sid e mo sfet driver to prevent any damage to lo ad. the converte r will shut do wn when an output over v o lt ag e is detected. once the ovp condition is detected, the controlle r will stop all pwm output s and will turn on low-sid e mo sfet driver to prevent any damage to lo ad. current sh aring (optional) current sh aring (optional) the p a rallel operation of multiple conv erters i s avail able with the nc3 0 /nc40 (opti on co de b). the converte rs will curre n t sha r e to be with in +/- 10% of each oth e r . in addition to co nne ct the i-share pin toget her for the cu rre n t sha r ing o p e r ation, the remote sen s e lines of the p a rallele d uni t s must be conne cted at the same poi nt fo r prop er op era t ion. also, unit s are inten ded to be turned on/ena bled at the sam e time. hot p luggin g is no t recomme nde d. the current sha r ing diagram sh o w in figure 30. nc 30 a/ 40a 0 i -sh ar e i -sh ar e vo ut +s en s e gr ou n d gr ou n d tr im nc 30 a/ 40a co ut 0 tr im co ut +s en s e loa d -s en s e -s en s e vo ut figure 3 0 : nc30/nc 40 curr e n t sharin g dia gra m figure 3 0 : nc30/nc 40 curr e n t sharin g dia gra m o -sense ground contact and distribution losses vin +sense ground vo o r load figure 2 9 : circuit config urati on for re mote s ense figure 2 9 : circuit config urati on for re mote s ense the in put un der-volt a g e l o ckout p r eve n t s the c onverte r from being damag ed wh ile operatin g when the inpu t volt age i s to o lo w . the l o ckout o c curs betwe en 7.7 v to 8.6v . the nc seri es modul es have non-l a tchin g over-curren t and sho r t-circuit prote c tio n circuitry . when over cu rren t con d ition o ccurs, th e mo d u le go es into the no n-lat c hing hiccup mo d e . when t he over-current con d ition is remove d, the module will re sume n o rm al operation. a n over current conditio n is detected by measu r in g the volt age drop across the hi gh-side m o sfet . the volt age drop acro ss the mosf et is also a function o f the mosfet? s rds(on ). rd s(on) i s af fecte d by tempera t ure, therefore am bient temperature will af fect the current limi t ince ption poi nt. the nc30/ nc40 p r ovide v o remote se nsin g to achi eve prop er reg u la tion at the lo ad poi nt s an d red u ce ef fe ct s of distributio n losses o n o u t put line. in the event of an open remote sen s e line, th e module sha ll maint a in local sen s e re gul ation throug h an internal resi stor . the module shall co rre ct fo r a tot a l of 0.4v of loss. the r e mo te s e ns e c o n n e c t s as s h ow n in f i gu r e s 2 9 . the p a rallel operation of multiple conv erters i s avail able with the nc3 0 /nc40 (opti on co de b). the converte rs will curre n t sha r e to be with in +/- 10% of each oth e r . in addition to co nne ct the i-share pin toget her for the cu rre n t sha r ing o p e r ation, the remote sen s e lines of the p a rallele d uni t s must be conne cted at the same poi nt fo r prop er op era t ion. also, unit s are inten ded to be turned on/ena bled at the sam e time. hot p luggin g is no t recomme nde d. the current sha r ing diagram sh o w in figure 30. nc 30 a/ 40a 0 i -sh ar e i -sh ar e vo ut +s en s e gr ou n d gr ou n d tr im nc 30 a/ 40a co ut 0 tr im co ut +s en s e loa d -s en s e -s en s e vo ut o -sense ground contact and distribution losses vin +sense ground vo o r load d
ds_nc1 2s3 0 a_020 720 0 7 9 fea t ures descriptions (con.) output v o lt age progra m ming the output volt age of the nc se rie s is trimmable by con n e c ting a n external re sisto r betwe e n the trim pin and output grou n d as sho w n figure 31 and the typical trim resi sto r value s are sho w n in figure 32. the output can also be set by an external v o lt age co nne cted to trim pi n as sho w n in fig u re 32. the nc30a/ 40a module has a trim range of 0.9v to 5.0v . a plot of trim behavior is sho w n in f i gure 3 3 co ut - sense + sense g round rs vo ut tr im figure 3 1 : t r i m mi ng output v o lt a ge the nc30/nc40 mod u le s have a trim rang e of 0.9v to 5.0v . the tri m resi sto r eq uation for the them is : rs (k ) = 9 . 0 69 . 12 ? ? vout vout v out is the de sire d volt age setpoi nt, rs i s the trim resi st a n ce be tween t r im and groun d, rs valu es sh ould not be le ss tha n 1.8 k outp ut v o lt ag e rs( ) +0.9 v open + 1 .2 v 38.3k + 1 .5 v 18.7k + 1 .8 v 12.1k + 2 .5 v 6.34k + 3 .3 v 3.92k + 5 .0 v 1.87k figure 3 2 : t y p i cal trim resistor values rt cout vt -sen se +sen se grou nd rs vo ut tr im figure 3 3 : output volt ag e trim w i th volt age source t o use volt a g e trim, the tri m equatio n fo r the nc3 0 is (plea s e refer to fig. 33) : 69 . 12 ) 1 ( 9 . 0 ) 69 . 12 1 . 13 ( ) ( + + ? ? + = ? rs vout rs vout vt rs k rt v out is the de sire d output volt age vt is the external trim volt a ge rs i s the re si st an ce b e twe en t r im a nd grou nd (i n k ) rt is the re si stor to be defin ed with the tri m volt age (in k ) below is a n e x ample abo ut using thi s volt age trim eq u a tion : example if vt = 1.25v , desi r ed v o ut = 2.5v and rs = 1 k ? = + + ? ? + = ? k rs vout rs vout vt rs k rt 72 . 0 69 . 12 ) 1 ( 9 . 0 ) 69 . 12 1 . 13 ( ) ( pow e r good the converte r provides an open colle ct or si gnal call ed powe r good. thi s output pin u s e s po sitive logic a nd i s ope n colle ctor. t h i s po we r g ood output i s abl e to si nk 5m a and se t high wh en the output is within 10% of output set p o int. the power g ood sign al is pull ed lo w when output is n o t within 10% of v out or enable i s off . output cap acit ance there is no output cap a citor on th e nc se rie s modules. hen c e, an e x ternal outpu t capacito r is req u ire d for stabl e operation. for nc30 m odule s , two external 6.3v/680 f output low esr cap a cito rs in p a rall el (for example, osco n) are requi red f o r st able op eration. it is importa nt to places the s e lo w esr capa citors a s clo s e to the load as possibl e in orde r to g e t improve d dynamic respon se an d better volta ge re gulatio n , espe cially whe n the load current is large. several of the s e low esr ca pacito r s coul d be u s e d together to further lo we r the esr. please refe r to individual d a tash eet for t he maximum allowed start-up lo ad cap a cita nce for ea ch nc seri es as it is varie d betwe en seri es.
ds_nc1 2s3 0 a_020 720 0 7 10 thermal consi d era t i o n therm a l ma nagem ent is an importa nt part of the system de sig n . to ensure prope r, relia ble operation , sufficie n t coo ling of the power mo dule i s need ed ov er the entire tem peratu r e ran g e of the modu le. conve c tio n cooli ng is u s u a lly the dominant mode of heat tran sfer. hen c e, the choice of equipment to chara c teri ze the thermal perfo rman ce of the po wer mo dule i s a win d tunnel. thermal t esting setup delta? s dc/ dc power mo dule s are ch ara c teri ze d in heated ve rtical win d tunne ls that si mula te the therm a l environ ment s encounte r ed in most electro n i cs equipm ent. t h is type of equipm ent commonly u s es vertically mo unted ci rcuit card s in cabinet ra cks in whi c h the po wer m odul es are mo unted. the follo wi ng figure sho w s t he win d tunnel cha r a c teri zati on setu p. th e power mo dule is m oun ted on a test pwb and is verti c ally po sition ed within the wind tunnel. thermal derating heat ca n be removed by increa sin g airflow over the module. to enhance system reliabi lity, the po wer module sh o u ld al ways be op erat ed bel ow t he maximum op erating tem p eratu r e. if the temperature excee d s the maximum m odule temp erature, reli abili ty of the unit may be affected. the maximu m accept a b l e temperatu r e measure d at the therm a l referen c e poi nt is 125 . t h is i s sh own in figure 36 & 41. fea t ures descriptions (con.) v o lt age margining output volt a ge margi n ing can be impl emented in t he nc30/nc4 0 module s by c onne cting a resi stor , r m a rgin -u p , from the t r im pin to the ground pin fo r margi n ing up the output volt ag e. also, the output volt age can be adju s t ed lowe r by co n nectin g a re si stor , r ma rgin -d o w n , from the t r im pin to the output pin. fi gure 3 4 sho w s the ci rcu i t config uratio n for output volt age ma rginin g adju s tment. cout rma rgi n-d own 0 vt -sen se rma rgi n-u p +sen se grou nd rs v out t rim figure 3 4 : circuit config urati on for outp u t voltag e margi n i n g reflected ripple curre nt and output ripple and noise meas urement the mea s u r e m ent set-up o u tlined in fig u re 35 ha s be en use d for both input reflecte d/ terminal rip p le cu rre nt and output volt ag e ripple a nd noise mea s u r eme n t s o n nc seri es conve r ters. cs=2 70uf *1 ltest=1.4u h cin = 27 0uf*1 cout=680 uf *2 figure 3 5 : inp u t reflected ri p p le/ cap a citor r i ppl e curre nt a nd output volt a ge rippl e an d no is e me asur e m en t setup for nc3 0
ds_nc1 2s3 0 a_020 720 0 7 11 thermal cur ves (nc12s0a0v30) t e s t section for nc12s0 a 0v30 mo dule a ir f l o w 19 (0. 75?) 50. 8 ( 2 .0 ?) f a cing pwb pwb ai r velo c it y and ambien t temperatur e m eas u r ed belo w th e module 38 (1. 5 ?) note: wind t unne l t e st setu p f i gure d i m e n sio n s are in m i llimeters and (inches) n c 1 2s 0 a 0v 30 (s ta nd ar d) ou tp ut c u r r en t v s . a m bi e n t te mp er atu r e an d a i r v e l o ci t y @ v o ut = 3. 3v (e i t her o r i e nta t i o n) 0 5 10 15 20 25 30 35 2 5 35 45 55 65 75 85 ambi en t t e mper at ur e ( ) o u tpu t c u r r en t( a ) na t u r a l co nvec t i on 100lf m 20 0l fm 30 0l fm figure 3 8 : output current vs. ambi ent tempe r ature an d air velocity@ v out = 3 .3v(either orient atio n) n c 12s 0 a 0v 30 (s ta nda rd ) o u tp ut c u r r e n t v s . a m bien t t e m per at ure a nd a i r v e l o city @ v out = 1. 5v (e it her or ien t at ion) 0 5 10 15 20 25 30 35 25 3 5 45 55 6 5 7 5 85 ambi ent t e mpe r at ur e ( ) ou t p u t c u rr e n t (a) na tu r a l co nvec ti on 100lfm 2 00l fm 30 0l fm figure 3 9 : output current vs. ambi ent tempe r ature an d air velocity@ v out = 1 .5v(either orient atio n) n c 1 2s 0 a 0v 30 (s ta nd ar d) ou tp ut c u r r en t v s . a m bi e n t te mp er atu r e an d a i r v e l o ci t y @ v o ut = 0. 9v (e i t her o r i e nta t i o n) 0 5 10 15 20 25 30 35 2 5 35 45 55 65 75 85 ambi en t t e mper at ur e ( ) o u t put c u r r ent ( a ) na t u r a l co n v ec t i on 100lf m 20 0l fm figure 4 0 : output current vs. ambi ent tempe r ature an d air velocity@ v out = 0 .9v(either orient atio n) figure 3 6 : t e mp eratur e mea s ure m e n t locati on * t he allow e d max i mu m hot s pot temperatur e is define d at 125 nc12 s 0a0v30(standar d) o u tput current v s . ambi ent tem per ature and ai r vel o c i t y @ vout = 5v(ei t her o r i ent ati on) 0 5 10 15 20 25 30 35 25 35 45 55 6 5 75 8 5 a m b i ent tempe r atur e ( ) outp u t cur r ent(a ) natur a l conv ec ti on 10 0lf m 200lfm 30 0lfm 400lfm figure 3 7 : output current vs. ambi ent tempe r ature an d air velocity@ v out = 5 v(either orient atio n)
ds_nc1 2s3 0 a_020 720 0 7 12 19 (0.75?) figure 4 5 : output current vs. ambi ent tempe r ature an d air velocity@ v out = 0 .9v(either orient atio n) nc12 s 0a0h30(standar d) o u tput current v s . ambi ent tem per ature and ai r vel o c i t y @ vout =1. 5v( e i t her o r i ent ati on) 0 5 10 15 20 25 30 35 2 5 35 45 55 65 75 85 a m bi ent tem pera t ure ( ) out put cur r ent( a ) na t u r a l conv ec ti on 10 0lfm 20 0lf m 30 0lf m figure 4 3 : output current vs. ambi ent tempe r ature an d air velocity@ v out = 3 .3v(either orient atio n) nc12 s 0a0h30(standar d) o u tput current v s . ambi ent tem per ature and ai r vel o c i t y @ vout = 3.3v( e i t her o r i ent ati on) 0 5 10 15 20 25 30 35 2 5 35 45 55 65 75 85 a m bi ent tem pera t ure ( ) out put cur r ent( a ) na t u r a l conv ec t i on 1 00l fm 2 00l fm 3 00l fm 4 00l fm thermal cur ves (nc12s0a0h30) t e s t section for nc12s0 a 0 h 30 mod u le a ir fl ow 9.5 (0.38?) 50.8 (2.0 ?) fa c i n g p w b pw b a i r ve loci t y an d am bi e n t t e m p e r at ure me as ur e d be l o w the m o du le note: wind t unne l t e st setu p f i gure d i m e n sio n s are in m i llimeters and (inches) figure 4 1 : t e mp eratur e mea s ure m e n t locati on * t he allow e d max i mu m hot s pot temperatur e is define d at 125 nc12 s 0a0h30(standar d) o u tput current v s . ambi ent tem per ature and ai r vel o c i ty @ vout = 5v(ei t her o r i ent ati on) 0 5 10 15 20 25 30 35 2 5 35 45 55 65 75 85 a m bi ent tem pera t ure ( ) out put cur r ent( a ) na t u r a l conv ec ti on 10 0lf m 20 0lf m 30 0lf m 40 0lf m 50 0lf m nc12 s 0a0h30(standar d) o u tput current v s . ambi ent tem per ature and ai r vel o c i t y @ vout = 0.9v( e i t her o r i ent ati on) 0 5 10 15 20 25 30 35 2 5 35 45 55 65 75 85 a m bi ent tem pera t ure ( ) out put cur r ent( a ) natural c onv ec ti on 10 0lf m 2 00l fm 3 00l fm figure 4 4 : output current vs. ambi ent tempe r ature an d air velocity@ v out = 1 .5v(either orient atio n) figure 4 2 : output current vs. ambi ent tempe r ature an d air velocity@ v out = 5 v(either orient atio n)
ds_nc1 2s3 0 a_020 720 0 7 13 mechanical dra w ing v e r t i c a l h o r i z o n t a l
ds_nc1 2s3 0 a_020 720 0 7 14 part numbering sy stem n c 1 2 s 0 a 0 v 3 0 p n f a produc t series inpu t v o lt ag e number of outp u t s outp ut v o lt ag e mount ing outp ut current on/off logic pin le n g th optio n co de nc- non-isolated converter 12- 10.2~13.8v s- single output 0a0- program mable h- ho rizont al v- ve r t i c a l 30- 30a p- positive n- nega tive r- 0.1 1 8 ? n- 0.140 ? f- ro hs 6/6 (lead f r ee ) a- s t andard functions model list model name packaging input v o lt ag e outpu t v o lt a g e outpu t cu rr ent efficiency 12v in @ 100 % load nc12s0a0v30p nf a v e rtical 10.2 ~ 13.8vdc 0.9 v ~ 5.0vdc 30a 94% (5. 0 v) nc12s0a0h3 0 p n f a horizont al 10.2 ~ 13.8vdc 0.9 v ~ 5.0vdc 30a 94% (5. 0 v) c o nt ac t : www .delt a . com.tw/dcd c us a : t e lepho ne: east coast: (888) 33 5 82 01 w e st coast: (888) 33 5 82 08 f a x: (97 8 ) 656 396 4 email: dcd c @ delt a -c orp.co m europe : t e lepho ne: + 4 1 31 99 8 53 1 1 f a x: + 41 31 9 9 8 53 53 email: d c dc@ d e l t a -e s.tw a s i a & the re st of w o r l d: t e lepho ne: + 8 86 3 45 26 10 7 x6 22 0 f a x: + 886 3 4 5 134 85 email: dcd c @ delt a .com.t w w arra nt y delt a of fers a two (2) year limited warran ty . complete warra n ty information is liste d on our web site or is available upo n requ est from delt a. information fu rnished by delt a is b e lieve d to be accu rate and reliab l e. however , no re sp on sibi lity is assume d by delt a for it s u s e, n o r for a n y infrin gement s of p a tent s or oth e r rig h t s of third p a rties, whi c h may result from it s use. no li cen s e is g r anted by implicatio n o r otherwise un der any p a ten t or p a t ent ri g h t s of delt a. delt a re se rve s the right to revise the s e spe c ification s at any time, without noti c e .

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