nichia sts-da1-1257a nichia corporation specifications for amber led NFSA172T pb-f r e e r e f l o w so lder ing a ppli c at io n b u ilt -i n e s d p r ot ec ti on d e vi c e r o hs co mp lia nt http://
n i chia st s-da1- 1257a 1 specifica t ions (1) ab sol u te maxi mum r a ti ngs item symbol absolute maximum rating unit f o rw ard current i f 250 ma pulse f o rw ard current i fp 350 ma al l o w a b l e r e v e rse current i r 85 ma po w e r d i s s i p a t i o n p d 875 mw oper ati n g t e m p er ature t op r - 40 100 c stor age t e mper ature t st g - 40 100 c jun c t i on t e mp er ature t j 150 c * abs o l u te maxi mum r a t i ngs at t s =25c. * i fp co ndit io n s wi th pu ls e wi dth 10 ms a n d du t y cy cle 10%. ( 2 ) in it ial e l ect r ical/ o pt i cal c h ar acterist ics ite m symbol condition typ. unit forward voltage v f i f =150ma 3.2 v luminous flux v i f =150ma 25 lm x - i f =150ma 0.57 - chroma ticit y c oordinate y - i f =150ma 0.42 - * char acteristics at t s =25c . * lum i nous f l ux v a l u e is t r ace a ble t o the cie 127: 2007- c om pli a nt nat i o n al st andard s . * the chroma ticit y coordinates are d e riv e d from the cie 1 931 chromaticit y di agr am. ranks ite m ra n k min. max. unit f o rward voltage - 2. 65 3. 50 v p11 30. 3 36. 0 p10 25. 5 30. 3 p9 21. 4 25. 5 lumino us f l ux p8 18. 0 21. 4 lm color r a nk ra n k l 3 x 0. 576 0. 549 0.562 0.589 y 0. 407 0. 425 0.438 0.411 * r a nking at t s =25c. * t o ler a nce of mea s ure m e n t s of the f o rward v o ltage is 0 .0 5 v . * t o ler a nce of mea s ure m e n t s of the l u m i n o us f l ux is 7 %. * t o ler a nce of mea s ure m e n t s of the c h romaticit y coordinate is 0.01. * basica l l y , a ship m e n t sha ll cons is t of th e l e d s of a comb i n at ion of th e a b ove r a nks. th e perc ent a ge o f each r a nk in the s h i p men t s h al l be deter m ined by ni ch ia.
n i chia st s-da1- 1257a 2 chroma ticity d i agram 600 59 0 58 0 l3 0. 3 0 0. 3 5 0. 4 0 0. 4 5 0. 5 0 0 . 45 0 . 50 0 . 55 0 . 60 0. 65 x y
n i chia st s-da1- 1257a 3 outline dimensions sts- da7- 0063a nf sx 172 no. ( g un it: mm) t h is p r o d uc t co m p li es wi th ro hs d i re cti v e. u ? ro hs ? m ?? * ( g un it : mm, t o lerance: 0. 2) ka o protection device 0.5 2. 7 2.7 1 catho d e ano d e 0.8 (2.3) 3 3 (2 . 3 ) catho d e mark ? item ??`| package materials ??| encapsulating resin materials ?O| electrodes materials | weight description ?? ceramics ?`? ? + w? silicone resin (with diffuser and phosphor) ? au-plated 0.024g ( t y p )
n i chia st s-da1- 1257a 4 soldering ? r e co mmend e d r e f l ow sold ering co nditio n ? r e co mmend e d man u al so ldering co nditio n temperature 350c max. soldering time 3 sec. max. r e co m m end e d solder ing p a d p a tt ern ( g unit: mm) 3 0.5 3.6 * the product i s desi g n ed to be refl ow so l d ered to a pc b . if y o u use d i p sol d er i n g for the products, nich i a ca nn ot guar antee its reliab ilit y . * r e fl ow so l d eri n g must not be performed more than t w ice . manual s o lde r i n g m u st on ly be done on ce. * care should be tak e n to a v oid cooling a t a r a pid r a te an d ens u re t h e p e ak te mper a t u r e r a mps down slow ly . * customer is advi sed to use ni trog en ref l o w sold er i n g a s ai r flow proc es s can caus e op ti cal d e gr adat i o n due to th e heat a n d atmosphere of refl ow sol d eri n g . * since si li con e us ed as e n ca psul at ing re si n in t h i s produc t is a sof t ma ter i al , do not pr es s on th e e n cap s ula n t . f a ilur e to co mply mig h t lea d to ni ck s , ch ip -o ut s, d e la m i n a tio n a n d def o r m at io n o f t h e encap s u l an t, b u mp br eak a ge and an adv e rse effect on produc t r e li abili t y . * r e pairing should not be d o ne after th e l e ds ha v e been solder ed. wh en repair ing is u n a v oidabl e, a double -h ead s o lderi n g iro n shoul d be used. i t should be conf i r med b e foreha nd w h ether the char acterist ic s o f th e led s wi ll o r will no t be d a maged by r e p a ir i n g. * w h en sold e r ing, avo i d app l yin g an y str e s s to t h e le d p a ckage wh i l e h e ate d . 120s ec. max. pre- hea t 180 t o 200c 260c max. 10 sec. max. 60 sec. max. above 220c 1 t o 5c pe r se c .
n i chia st s-da1- 1257a 5 t a pe and reel dimensions sts- da7- 0064 quant i t y pe r r e el = 4000 p c s 1 `? 4000 ? * n f sx172t ` ??? tap e 4 0.1 1. 75 0.1 4 0. 1 2 0.05 3. 5 0.05 -0 1. 5 +0 .1 8 +0. 3 -0 . 1 ?` / ` tr a iler and l e ader t o p c o v e r t a pe led ?? ` min 400mm ? ` min 160mm ? tr ai le r 160 mm min ( e m p t y pocke t s) lo aded po ckets ? ? ` e m bo ss ed c a rr i e r t a pe ?? ` ?` f eed dir e ct ion le ade r w i t h out top c o ve r tape 400 mm min min 100mm lea d er with to p cov e r ta p e 100 mm min (em p t y pocke t ) `? reel f 1 3 0 . 2 f 2 1 0 . 8 ? la b e l 2 1 0 . 8 1 3 0 . 2 11.4 1 9 0 .3 60 +1 -0 180 +0 -3 th e t a pe packin g me t h o d c o mp lie s w i t h j i s c 0806 (p ack a ging of ele c tronic co mpo n e n ts o n co nt inuous t a pes ) . * j i s c 0806 ?? ?` ?? ? no . ( g un i t : mm) 3. 3 0. 1 0.2 0.0 5 1.05 0.1 3. 3 0.1 catho d e mark -0 1 +0 . 2 5
n i chia st s-da1- 1257a 6 p a ckaging - t a pe & reel nichia led sts-da7-0006 n x xxxxxxx ? label la b e l no . ` ? ` mo is ture abs o rbent ma terial reel ` ?` sea l mois t u re pr o o f foil bag ? ? t h e reel i s pl a c ed i n the mo i s ture pr o o f bag wi th a moisture a b so r bent material. t h e bag is h e at sealed. ? K ? ` ? t h e moistu re proo f f o il b a gs are packed in a ca r dboa r d box w i th c o r r u ga ted pa rti t i o n . c u s t o m er is adv i s ed to pac k the pro d uc ts in the o r igi n a l pa ck a g i n g o r equi v a l ent in tra n s i t. ? \ H? y ? B ? ? y * t h e c a rdbo ard bo x i s no t water-res i s t ant. d o no t ex po s e t o water. ?` ? ? ? y ? ? * do not drop the cardb o ard b o x o r expose it to sh o c k. i f th e b o x f a l l s, the p r o d ucts co ul d be dama g e d. ? Q H n ? u? p ? ? ? ? * t h e products are taped and re eled, and then packed i n mo isture-pr o of bags. t h e m o is tu re -pr o o f ba gs a r e pa ck e d in c a r d bo a r d bo x e s to pr ev e n t da m a g e d u r i n g sh i p m e n t . * u ? ?` ? n ? g o ?` y ? fo r detai l s , see "l o t nu mberi n g sch eme" i n t h is d o cu men t . * ? ? ???? ? ? if not provided, it is n o t ind i cated on th e l a b e l . ******* is t h e cus t o m e r p a r t n u mbe r . O ? ? ? ? * ******* ? the l a b e l does no t have the ran k fi el d fo r u n - r a n k e d pr o d u c ts. * ? ? ? ? rohs nxxxxxxxx xxxx led ** **** * n i c h i a c o r p o r a t i o n 4 9 1 ok a, k a m i n a k a , an an, tok u sh i m a, j a pan typ e lot qty. ym xx xx -rrr pcs rohs nxx xxx xx x xxxx led ******* rr r pcs typ e ra nk qty. n i ch ia co rp o r at ion 491 oka, kaminaka, anan, tokushima, japan
n i chia st s-da1- 1257a 7 l o t numbering scheme lot numb er is presented by using t h e foll owing al phanum e r i c c o de . ymxxxx - r r r y - y e a r year y 2009 9 2010 a 2011 b 2012 c 2013 d 2014 e m - m o n t h mont h m month m 1 1 7 7 2 2 8 8 3 3 9 9 4 4 10 a 5 5 11 b 6 6 12 c xxxx - n i c hi a's product n u mber rrr -r ank i ng by color c oordi nat e s , r a nking by lu m i nous flux
n i chia st s-da1- 1257a 8 dera ting characteristics nf s x 1 7 2 s t s - d a 7-00 59 no . derating1 0 10 0 20 0 30 0 40 0 50 0 0 2 0 4 06 08 0 1 0 0 1 2 0 ( 70 , 250) ( 100 , 157 ) der a t i n g 2 0 10 0 20 0 30 0 40 0 50 0 0 20 4 0 60 80 100 12 0 ( 1 00, 2 50) du t y 10 10 0 10 0 0 1 1 0 100 250 350 S allowable forward current ( ma ) ` - S so l d e r t e m p e r a t ur e ( c a t ho d e s i d e ) v s a llo w a ble f o r w a r d c u r r e n t ? ? - S a m b i en t t e m p e r a t u r e v s a l l o w a ble f o r w a r d c u r r e n t S al l o w a b l e f o r w a r d c u r r en t ( m a ) S a l l o w a b l e f o rw a rd c u rr e n t ( m a ) ` s o l d er t e m p er atu r e ( c ath o d e s i d e ) ( c) ?? a m b i en t t e m p e r atu r e ( c) ? ` ` du t y r a t i o ( % ) ` ` S d u ty r a ti o v s a llo w a ble f o r w a r d c u r r e n t t a = 2 5 c 95 c/w ja r =
n i chia st s-da1- 1257a 9 optical characteristics nf s a 1 7 2 n o . s t s -d a 7 - 006 0a sp e c tr u m 0.0 0. 2 0. 4 0. 6 0. 8 1. 0 400 4 50 500 550 6 0 0 6 50 7 0 0 75 0 800 r e la t i v e i l lu m i n a n c e ( a .u .) dir e c t i v i t y 1 90 80 70 60 50 40 30 20 10 0 -1 0 -2 0 -3 0 -4 0 -5 0 -6 0 -7 0 -8 0 -9 0 k sp e c t r um k? r e l a ti v e e m i s s i o n i n te n s i t y ( a . u . ) L wav e l e n g t h ( n m ) ? d ir e c t iv it y ? ra d i a t i o n a n g l e 10 . 5 0 0 . 5 1 150 m a i fp = t a = 2 5 c 15 0 ma i fp = t a = 2 5 c * ?? a l l ch a r act e r i st i c s sh ow n a r e for r e fe re n c e on l y a n d ar e n o t g u ara n t e e d .
n i chia st s-da1- 1257a 10 for w a r d cur r e n t char acteris t ics / tempera t ure characteristics nf s a 1 7 2 s t s - d a 7- 006 1a no . tavf 2. 0 2. 5 3. 0 3. 5 4. 0 4. 5 - 60 - 40 - 2 0 0 2 0 4 0 60 80 10 0 120 ta iv 0. 6 0. 8 1. 0 1. 2 1. 4 -6 0 - 40 - 2 0 0 2 0 40 6 0 8 0 1 0 0 1 2 0 vf i f 10 10 0 10 00 2 . 02 . 53 . 03 . 5 4 . 0 4 . 5 15 0 35 0 relative luminous flux (a.u.) ?? - am b i e n t te m p e r a t u r e v s r e l a t i v e l u m i no us f l u x for ward curren t (ma) ifiv 0. 0 0. 5 1. 0 1. 5 2. 0 2. 5 0 100 20 0 3 00 400 5 0 0 r e la t i v e l u m i n o u s f l ux ( a .u .) - fo r w a r d c u r r e n t v s r e l a t i v e l u m i no us f l u x fo r w a r d c u r r e n t ( m a ) R - fo r w a r d v o l t a g e v s fo r w a r d c u r r e n t ? - R a m b i en t t e m p e r a t u r e v s fo r w a r d v o l t a g e ?R fo r w a r d v o l t a g e ( v ) ?R f orward voltage (v) ?? amb i en t t e m p er atu r e ( c) ?? am b ient tem p erature ( c ) t a = 25 c * ?? all characteri st ics show n are for reference only an d are not guaranteed. i fp = 15 0 m a i fp = 15 0 m a t= 2 5 c a
n i chia st s-da1- 1257a 11 for w a r d cur r e n t char acteris t ics / tempera t ure characteristics no . nfsa172 sts-da7-0062a taxy 0. 41 0 0. 41 5 0. 42 0 0. 42 5 0. 43 0 0 . 56 0 0 . 5 65 0 . 57 0 0. 575 0 . 5 80 - 40c 0 c 25 c 50 c 100 c x if x y 0. 41 0 0. 41 5 0. 42 0 0. 42 5 0. 43 0 0. 5 60 0 . 5 65 0. 5 7 0 0. 575 0 . 5 80 20 m a 15 0 m a 350 m a x y y 15 0 m a i fp = ? ? - ? a m b i e n t t e m p er at u r e v s ch r o m a ti c i ty c o o r d i n a te - ? fo r w a r d c u r r e n t vs ch r o m a ti c i ty c o o r d i n a te t a = 25 c * ? a l l c h a r ac t e r i st i c s sh ow n a r e f o r r e f e re n c e on l y a n d a r e n o t g u ar an t e ed .
n i chia st s-da1- 1257a 12 reliability (1) t e s t s a n d r e sults te s t reference standard test conditions te s t duration failure criteria # unites failed/tested r e si st anc e t o soldering heat (reflow soldering) j e it a ed- 4701 300 30 1 t sl d = 260c, 1 0 s e c , 2 re f l ow s , pre c ondit i o n : 3 0 c, 70%r h , 168 hr #1 0/22 solderability (reflow soldering) j e it a ed- 4701 303 30 3a t sl d = 245 5c, 5 s e c, le ad- f r e e sold e r ( s n- 3. 0ag - 0. 5cu) #2 0/22 ther mal shock je it a ed- 4701 300 30 7 - 40c t o 100c, 1 m i n dwel l, 1 0 sec tr an sfer , pre c ondit i o n : 3 0 c, 70%r h , 168 hr 100 c y c l e s #1 0/50 t e mper ature cycle jeita ed- 4701 100 10 5 - 40c ( 3 0 mi n) ~ 25c ( 5 min) ~ 100c ( 30 m i n) ~ 25c ( 5 min) 100 c y c l e s #1 0/50 mois tur e r esistance (cycl i c ) jeita ed-4701 200 20 3 25c ~ 65c ~ - 10c, 90%r h , 2 4 hr per cycle 1 0 cycle s #1 0 / 5 0 high t e mp er at ure stor age j e ita ed-4701 200 20 1 t a =100c 1000 hours #1 0/ 50 t e mper a ture humidity stor age j e ita ed-4701 100 10 3 t a =60c rh=90% 1000 hours #1 0/ 50 low t e mp er ature stor age j e ita ed-4701 200 20 2 t a =- 40c 1000 hours #1 0/ 50 r oom t e mper ature oper at ing li f e t a =25c i f =2 50m a t e st board : se e no tes b e low 1000 hours #1 0/ 50 high t e mp er at ure oper at ing li f e t a =100c i f = 150m a t e st board : se e no tes b e low 1000 hours #1 0/ 50 t e mper a ture humidity oper at ing li f e 60c rh=9 0 % i f =200m a t e st board : se e no tes b e low 1000 hours #1 0/ 50 low t e mp er ature oper at ing li f e t a =- 40c i f = 150m a t e st board : se e no tes b e low 1000 hours #1 0/ 50 p e rma n ence of marki n g j e it a ed- 4701 500 50 1 is opropyl alc o hol , 235c , dipping time: 5 min 1 t i me #1 0/ 22 vibr ation j e ita ed-4701 400 40 3 200m / s 2 , 100 ~ 2000 ~ 1 00 hz, 4 cycle s , 4 m i n , eac h x, y , z 48 m i nut e s #1 0/10 ele c tro s ta ti c discharges jeita ed-4701 300 304 hbm, 2 kv , 1. 5 k ? , 1 0 0 pf , 3 puls es , al te rn at el y posi ti v e or n e gat i ve #1 0/22 no tes: 1) t e st board: fr4 board thickne ss = 1.6 mm , copper l a yer thi c kn es s = 0 . 0 7 mm , r ja 95c/ w 2) measur ements are p e rformed after al l o w i ng the led s to return to room temper a t ure. ( 2 ) f a ilu re c r it eria criteria # items conditions failure criteria f o rw ard v o ltag e (v f ) i f =150ma > initial value 1.1 #1 luminous flux ( v ) i f =150m a < init i a l v a l u e 0. 7 #2 so lder abi l i ty - less than 95% solder coverage
n i chia st s-da1- 1257a 13 ca u t ion s (1) stor age conditions temperature humidity time before opening aluminum bag 30c 90%rh within 1 year from delivery date stor age after opening aluminum bag 30c 70%rh 168 hours baking 655c - 24 hours this produc t i s c o m p l i a nt t o j e d e c msl 3 or e q uiv a le nt . se e ipc/j e d e c std- 020 for t h e det a ils of t h e m o i s t u re s e ns it i v it y l e ve ls . interface d e l a mi na ti on ca n occur due to v a pori zati o n and expa ns ion of absorbed mo i s tur e i n th e le d packag es c a used by so lder ing he at, wh i c h may r esu lt in de gr adatio n in o p ti c a l per f o r m a n c e . t o mi ni m i ze mo i s t u r e abso r p tio n in to t h e pro d uct s duri ng t h e tr ansport a t i on a n d st or age, the product s are pa c k e d in a moi s t u re- p roof al um inum bag. d e s i c c a nts ( s il ic a ge l) inside th e p a cking tur n from blue to r e d as it absorbs moisture. after opening the moisture-proof al umin u m bag, the pro d ucts should b e comp le ted so lder ing proc es s with in th e r a n g e of the condition s above. if unu sed le d s rema i n , they shoul d be stored wi th desi cc ant s ( s ili c a ge l) in he rme t i c all y s e al e d contain e r . n i ch ia re com m e n ds u s i n g th e ori g i n al moisture-proof bag for stor age. after t h e "p eriod aft e r op eni n g" sp ec ifi e d above, or if t h e de si cca nt s ( s i l i c a ge l) ar e no long er blu e , the produ c t s need to be bak e d. no te th at bakin g mu st only be don e once. although th e lead s or electrode pads (an o de and ca tho d e) of th e prod uct of t h e prod uct ar e pla t ed wit h gold , prol onged exposure to a corrosi v e en v i ro nment mi ght caus e th e gold plat ed t h e l e ad s or ele c trod e pads to tar n i s h , and thus le ading to dif f i cu lt ie s in so ld eri n g. if unu sed l e ds r e ma in , th e y mus t be sto r ed in a her m et i c al ly sea l e d co nta i ner . nich i a r e co mm end s us ing the or i g i n al moi s ture-proof bag for stor age. t o avoid conden sat i on , th e pr oduc ts mu st no t be s t ore d in t h e area s where te mper a t ure a n d hu m i di t y flu c t u at e g r eat l y . (2) di recti o ns for use in design ing a circuit, the cu rrent through each l e d must not ex ceed the abso lute max i mum r a ting speci f i e d for ea ch led . it is reco mmen ded to use circu i t b whi c h regul a tes the current fl ow i n g th rough each led . i n the mean w h il e, when drivin g leds with a constan t vo lta g e in c i r c ui t a, the cu rrent through the le ds ma y v ary due to the v ar i ation in f o r w ar d v o ltage ch ar acteristics of t h e leds. (a) ... (b) .. . this product sho u l d b e oper ated i n forw ar d bias. a driving cir c u i t mu st be design ed s o that th e pro d uct is no t s u bj ect e d to ei ther forw a r d or rev e rse v o l t ag e whi l e it i s off . i n part ic ular , if a r e ver s e vo ltag e i s co ntinuo us ly applied to th e produc t, such oper at i o n can ca us e migr a t ion r e su l t in g in l e d da mage . f o r s t abi l i z ing t h e led c h ar ac t e r i st ic s, it is re c o m m e n d e d to oper ate a t 10% of the r a ted current or hi gher . f o r outdoor use, necessary mea s ures sho u l d be tak e n to prevent wa ter , mo i s tur e and sal t air da mag e . (3) handl i n g precau ti ons when ha ndling t h e produ c t, do no t tou c h i t d i rectl y w i th bare hand s as i t may con t am ina t e t h e surfa ce and affe ct on opt i c a l ch ar ac te ri sti c s . i n t h e wors t c a s e s, ex ce ss i v e fo rce to the pr oduct mi ght r e sult in ca tastro phi c fa i l ure due to package damage a n d/or b u mp breaka ge. w h en ha ndl i ng t h e produ c t wi th t w ee zer s , make sur e t h at exc e s s ive f o rce i s not app l i e d to t h e re sin portio n of th e produc t. f a ilure to co mply can ca us e th e res i n por t ion of the pro d uct to be cut, chipp e d, d e la minated and / o r deformed , an d bump to be brok en, and thu s resu lt in g in cata st r o phic f a il ur e . if the produ c t is dropped , it migh t be da maged . do no t sta c k asse mb led p c bs to g e t h er . f a il ure to co mp l y can cau s e th e res i n po rt io n o f the pro d u c t to be c u t , ch ip ped, delaminated and/or defor m ed , and bu mp to be br o k en , and t h u s r es u lt ing in ca tas t r o phic f a il ur e .
n i chia st s-da1- 1257a 14 (4) desi gn consi d er ati o n pcb warpag e after mo un ti ng th e pro d uc t s o n to a pc b c a n cau s e the p a ck age to br ak e. the leds shoul d b e pl a c ed so as to minimiz e t h e stre ss o n the l e d s d u e to pc b bo w and tw is t. the positio n and orienta t io n of the leds affect how m u ch me cha n i c al stre ss i s exerte d on the leds pl aced near the score li nes. the leds shoul d b e pl a c ed so as to minimi z e the stress on the l e ds d u e to board flexi n g. board separ a ti on must b e performed us in g spec ia l jig s , not with hand s . if an alu m in um pc b is used, cu sto m er is advised to v e rit y the pc b with th e products before use. thermal str e ss d uri ng us e can ca us e th e solder jo in ts to cr ack. (5) el ectrostati c di scha r ge (es d ) the produ c t s are se ns it ive to sta t ic e l e c tr i c i t y or surg e voltag e. a n es d event may da mage it s di e or reduc e i t s re li abil i t y performance. when handling the products , meas ure s a g ain s t e l e c tro sta t i c di sch arg e , i n c l ud ing th e follow i ng s, ar e stron g ly r e c o m m e n d e d . e l i m i n a t i n g t h e c h a r g e ; w r i s t str a p , es d footw e ar and garments, es d fl oors g r o u n d i n g t h e e q u i p m ent and tools at workstation e s d t a ble / sh el f m a t (con du ct i v e m a te ri al s) proper grou nding te ch niq u es are req u ir ed for all dev i ce s, equip m ent a n d mac h in ery u s ed i n t h e as se mbly of t h e pr oduct s . also no te th at surg e pro t e c tion shou ld be cons ider ed i n t h e de sig n of cu sto m er produ c ts . i f t ool s or equ i pm en t c o n t ain in su l a t i n g m a te rials, su ch as gl as s or plas tic, prope r me as u r e s agai nst el e c t r o st ati c disc h a rge , includ ing th e f o llo w i ng s, ar e str o n g ly r e co mm end e d. dis s ipa t i n g the charge w i th co nd uc tive mat e ria l s p r e v e n ti ng t h e c h arge ge n e r a ti on wi th m o is tu re neutr a liz i n g th e char g e wit h io n i zer s when perfo rming the char acter i sti cs i n sp ecti on of the l e ds in y o ur ap pl icati o n, cu sto m er i s advi sed to ch eck on th e le ds whether or not they are d a maged by es d . su ch da ma ge can b e detected d u ring forw ard v o l t age mea s urement or l i g htup test a t l o w curr ent. (t he reco mmend e d curr ent i s 1 m a or lower) esd-da mag e d led s ma y ha v e a current f l ow at l o w volt age, or no lo ng er lig ht up at low curren t . f a ilur e c r iter ia : v f < 2.0v at i f = 0. 5m a (6) t h ermal manageme nt ther mal ma nagement is a n important fa ct or wh en designing y o ur pro d uct by u s ing t he le ds . th e ri se i n le d di e t e mp er ature can be affected by pcb thermal resist ance or/and l e d spacing as mou n ted o n th e bo ard. customer is adv i sed to d e sign the pro d uc t to en sure tha t the l e d d i e te mper at ure do e s not exceed t he requ ired m a xim um ju nc ti on t e mp er atur e (t j ). d r i v e current should be d e ter m i n ed for t h e s u rround ing ambi en t te mp er ature (t a ) to dis s ipa t e the h e at fro m the pr o d uct . the fol l owi n g equat i on s ca n be us ed to c a lcu l a t e the ju nct i on te mper a t ure of t h e pro d uct s . 1 ) t j = t a + r ja ? w 2 ) t j = t s + r js ? w * t j = le d jun c tion temper ature: c t a = a m bi en t t e mp er ature : c t s = sol d ering te mperature (cat hode side ) : c r ja = t h erma l resista n ce fro m ju n c tion t o am bi en t: c / w r js = therma l re si sta n ce fro m junction to t s measu r ing point 30 c/ w w = i n p u t p o w e r ( i f x v f ): w ts point
n i chia st s-da1- 1257a 15 (7) cl eani ng if r equir ed, iso p r o py l a l co h o l (ip a ) s h o u l d be use d . o t he r solven ts may caus e pre m at ure fai l ure to t h e le ds d u e to the damag e to the resin p o rti o n. th e eff e ct s of su ch so lven ts s h ou ld b e v e ri fied pri o r to use. in add i ti on, the use of c f cs suc h as fr eon i s heav ily r e gul a te d. ultr ason ic cleaning is no t recom m e nde d fo r the le d s s i n c e i t may adve rsel y effect on the l e ds by th e ul tr aso n ic po wer and led ass e mb led co ndi t io n. i f it i s unavoida b le , cu sto m er i s advis e d to ch eck prior to us e tha t t h e c l ea ning will no t dam a ge th e le ds . (8) ey e saf e t y the int e r n at i o nal el ec t r i c al com m i s s i o n ( i ec) pub l i s he d in 2006, iec 62471: 2006 phot obi ol og i c a l s a f e t y of l a m p s and lamp sy ste m s wh ich in clud es l e ds w i thi n i t s scop e . mea n wh il e le d s were re move d from th e sco pe of t h e iec 60825- 1: 2007 l a s e r s a f e t y s t andard, the 2001 e d i t i on of whi c h i n c l ude d led s our c e s wit h i n it s s c op e . however , keep it m i nd t h at some coun tri e s and reg i ons have adopt e d stan dards ba se d on the i e c la ser safe t y s t andard iec 60825- 1: 20 01 whi c h i n c l ude s leds wit h in i t s sc ope. f o ll owing iec 62471: 2006, most of n i chi a leds can b e cl a s si fied as be long ing to either e x empt g r oup or risk gr oup 1. especia l ly a high -power l e d , t h at em it s l i g ht co nta i n i ng blue w a ve le ngt h s, ma y be in risk group 2. great care shoul d b e tak e n when v i ew i n g di rectl y the led dri v en at hi g h current or the le d wi th o p t i cal ins t r u me nt s, which grea tly incr ease th e hazard to y o ur ey es. view ing a f l ashi ng l i gh t m a y caus e eye d i s c omfort . when in corpor ating the l e d i n to y o ur product, precautio n sho u ld be take n to avo i d adve rse e ffect on human body caused by the light stimu l u s . (9) ot hers the le d s d e scr ibed in th is brochure ar e i n te nded to be used for ordina ry el ectroni c equi p m en t (such as offi ce eq uipment, commun i cat i ons equ i pm en t, mea s ure m e n t in str um e n t s and hou s eho l d applia nc es ). co nsult n i c h ia' s sal e s staf f in adv a n c e f o r inf o r m a t io n o n th e appl ica t i o ns i n wh ich e x ceptio na l qua l it y and r eliab i l i t y ar e r eq u ir ed , par t icu l ar ly when the f a il ure o r malf u n c t io n o f the le ds m a y direc t ly j eo p ardize lif e o r heal th (such as for ai rplanes, a e rospa c e, sub m ersi b l e repeaters, nucl e ar reactor co nt r o l sy s t e m , a u t o mobi le s, tr affi c contr o l equi p m ent, li fe su pport s y stem s an d s a fet y de vi ce s). the c u s t om er sha ll not reverse eng i ne er by disas s e m bl i n g or analys is of the le d s wit h out ha v i ng pr ior writt e n co ns ent from nich i a . w h en def e c t ive le ds are fou n d, t h e c u s t om er sh a ll inf o r m ni ch ia dir ec t ly bef o r e di sas s e m bl ing o r ana l y s is . custo m er a n d ni ch ia sha ll agr ee th e o f f i ci al spe c if ica t io n o f supplied products prior to the st ar t of a custo m er ? s v o lume prod uct i on . the app e ar ance a n d sp ecifica t ion s of th e produc t ma y b e mod i fi ed for impro v ement w i tho u t noti ce.
|
