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mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 1 of 14 da t as h ee t aug /1 4 f e a t u r es a nd b en e f i t s ? 1 - c h ip sol u ti o n ( h all e l e m e n t + ou t pu t dri ve r s ) ? soft s w i t c h i n g for low n o i s e ? tw o - st a ge t h e r m al pr o tecti o n ? l o cked ro t or pr o tection an d au t o - r es t a rt ? fg and rd a v ail ab le in 4 - p in vk ( no - v dd de s ign) ? pi n - t o - p in c o m p a t i b le w ith u s 90a & us9 1 a ap p l ic a t i on s ? 24v t w o - coil motors ordering code product code temperature code package code option code packing form code mlx90285 l vk aba - 000 bu mlx90285 l vk aaa - 000 bu mlx90285 l dc aba - 000 re mlx90285 l dc aaa - 000 re legend : temperature code: l for temperature range - 40c to 150c package code: vk for plastic single in line , dc for soic 8 (aecq100 c ompliant ) option code: aaa - 000 for frequency generation (fg) , aba - 000 for rotation detection (rd) packing form: bu for bulk, r e for reel ( live bug) ordering example: mlx90285lvk - aba - 000 - bu 1 f u n c t i onal d i a g r am 2 g e neral des c r i p t i o n t h e m l x90 2 85 i s a o n e - c h i p s ol u ti o n f o r d r i v i n g t w o - coil b r u s h l e s s dc c o o l i n g fa n s . t h e d e v ice f e a tu r e s soft s w itc h i n g to low e r ac ou s t i c a n d e l e ctr i cal f an n oi se . t h is e ff i c i e n t s ol u ti o n is e nh a n c e d w ith an i n tellig e n t act i v e slo p e co n t r o l w h ich au t o m a t ically a d j u s ts t h e s lo p e du rati o n d e p e nd i n g on t h e f an r o t a t ion s p ee d . t hu s , t h e f an p e r f orma n c e to n oi s e ratio is alwa y s ke p t o p ti m u m w it h o u t t h e n ee d o f tun i n g v i a e xt e r n al compo n e n t. t h e de v i c e i n clu de s a n o ve l tw o - st a ge t h e rmal pr o t e cti o n as we ll as l o c k e d ro t or pr o t e c ti o n f or d em a nd i n g a pp lica t i on s af e ty r e qu i r e m e n t s . fr e qu e n cy g e n e rat o r or r o t a t ion d e tection i s a v ail ab l e . t h e o p e n - d rain o u t pu t m a k e s t h e co nn e ct i v ity w ith a n y e xt e r n al i n ter f ace f or h ar d w a r e m o n it o ri n g ea s i e r. t h e s e f e a tu r e s a r e combi ne d w ith t h e m e l e x i s p a t e n ted n o - v d d de s ign to fit t h e i c in s m a l l 4 - p in vk p ac k age. t h e de v ice is a l s o d e l i ve r e d in dc p ac k age f or a u t o m a t ic as s em b l y .
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 2 of 14 da t as h ee t aug /1 4 ta b le of c ont e n t s 1 f u n c t i o n a l d ia g r a m ............................................................................ ................... . ...................................... . 1 2 g e n e ra l desc r ip t i o n ............................................................................................... . ...................................... . 1 3 gl o s s a r y o f t e r m s.............. ................................................................................. . ......................................... . 3 4 a b s o l u te m a x i m u m r a t i ng s ..................................................................................................... .................... . 3 5 a p p l i c a t i o n i n f o r m a t i o n ............................................................................................................................. .. . 3 6 g e n e ra l e l ect r i c a l s p e c i f i c a t i o n s ............................... . ..... .............................................................................. . 4 7 m a g n et i c s p ec i f i c a t i o n s ............................................................................................................................. .. . 5 8 driver o u t p u t vs ma gn e t i c p ol e ............................... . .................................................................................... . 5 9 de t a i l ed g e n e ra l desc rip t i o n ...................................................................................... .................................. . 5 1 0 u n i q u e f e a t u r es ............................................................................................... . ......................................... . 6 10.1 a c tive s o f t s w it ch ing ............................. .. . ............................... . ............................... . ............................... . .................... 6 10.2 b e s t p er f o r manc e t o n o i s e c omp r om i s e ............................... . ............................... . ............................ ... . ....................... 7 10.3 t w o - s t ag e th e r ma l p r o t ec ti o n ............................... . ............................... . ............................... . ............................... . ..... 7 1 1 pe r f o r m an ce g r a p h s ................................. .............................................................. . ................................... . 8 11.1 r d so n v s . t j ............................... . ............................... . ............................... . ............................... . ....... ........................ . ..... 8 11.2 r d so n v s . v d d ............................... . ............................... . ............................... . ............................... . ............................... . .. 8 11.3 m agne tic pa r ame t e r s vs. t j ..... .......................... . ............................... . ............................... . ............................... . .......... 8 11.4 m agne tic pa r ame t e r s vs. v d d ............................... . ............................... . ...................... ......... . ............................... . ....... 8 11.5 i d d v s . t j ............................... . ............................... . ............................... . ............................... . ............................... . ......... 8 11.6 i d d v s . v d d ............................... . ............................... . ............................... . ............................... . ............................... . ...... 8 11.7 v o l v s t j ............................... . ............................... . .... ........................... . ............................... . ............................... . ......... 9 11 . 8 p o w e r d i ss ip a ti o n vs. t a ............................... . ............................... . ............................... . ......................... ...... . ................ 9 1 2 s t a n da r d i n f o r m a t i o n r e ga r d i n g m an u f a c t u r a b i l i t y o f m elexis p r o d u c ts w i t h di f f e r e n t s o ld e r i n g p r o ce s s e s ...................................................................................... . 10 1 3 esd p r ec a u t i o n s ........... .................................................................................... . ....................................... . 10 1 4 p a c k a g es i n f o r m a t i o n ( o u t l in e d ra w i n g , h a l l p l a t e l o c a t i o n & p i n o u t ) ...................................................... . 11 14.1 vk p ac k ag e ( 4 - p in t o 92) ............................... . ............................... . ............................... . ............................... . ............ 11 14.2 dc pac k ag e ( 8 - p in nar r o w s o ic) ............................... . ........ ....................... . ............................... . ................................ 12 1 5 d i s c l a i mer ............................................................... . ................................................................................ . 14
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 3 of 14 da t as h ee t aug /1 4 3 g l o s sary of t e rms tw o - coil fan a fan with t w o - c o il w i nd i n g s w h e re c u r r e n t al t e r n a te s fr o m 1 coil t o th e o t h e r d e p e nd i n g o n th e d ir e ction o f th e mag n e tic f i e l d . milli t e s la ( m t ), g a u s s u n its o f m ag n e tic f l u x d e n s ity : 1 m t = 10 g a u s s v dd vol t age o n th e c o ils c o m m on n o d e . i dd curr e n t s upp l y i n g th e c h ip w h ich f lo w s th r ou gh th e c o il co nn e cted to th e s w itc h e d o f f ou t pu t d ri ve r. peak o u t pu t c u rre n t t h e c u rre n t f l o w i n g in th e c o il a t s t a r t - up , on ly limited b y t h e c o il r e s i s t an c e r c oi l a n d t h e ou t pu t d ri ve r r es i s t an ce r d s o n. co n ti nu o u s ou t pu t c u rre n t t h e c u rre n t f l o w i n g in th e c o il w h e n th e fan is spi nn i n g n o r m all y . l o cked r o t o r t h e sta t e w h e n th e fan sto p p e d spi nn i n g du e t o m e c h a n ic a l b loc k age. lfpm li n e ar fe e t p e r mi nu te C u n it of a ir f low ve l o city 4 abs o l u t e max i m um ra t i n gs t a b le 1: a b s ol u te ma x i m u m r a t i n gs e xc ee d i n g th e ab s ol u te m a x i m u m ra t i n gs m ay c au s e p e r m a n e n t d amage. e x p o s u re t o ab s ol u t e - m a x i m u m - ra t e d c ond iti on s f or e xt e nd e d p e rio d s may a f f e ct d ev i ce r e lia b ilit y . 5 ap p l ic a t i on in f orm a t i o n t y p i c al tw o - co i l f an a pp li c at i o n c i rcu i t at p o we r - o n , t h e f g /rd o u t pu t is ke p t h igh f or at l e a s t 500 ? s i nd e p e nd e n tly of t h e r o t a ti o n s t a t u s or m ag n e t i c f i e l d . it p r e ve n t s a pp e ara n c e of un e x pe cted i m pu l s e s o r o s cilla t ion on t h e f g / r d o u t pu t s ign a l du e to b r o ken c o i l (i. e . o p e n co nn e c ti on ) or s h o rt co nn e ction b e t w ee n o u t 1 or ou t 2 to gr ound . a d e co up ling ca p acit o r f r o m 1 0 0 n f or h igher s h o u ld b e p laced b e t w ee n t h e v dd p o i n t ( f an co m m on n o d e ) a n d ic gro und . it r e du c e s t h e r i s k of e l e ct r i cal o v e r - s tr e s s d ama g e to gro un d b o un c i n g w h e n plu ggi n g/ unp l u ggi n g t h e f an co nn e ct o r. sp ee d co n tr o l s c he m e s us i n g a tr an s i s t o r on t h e gro un d p in are n ot r e co m me nd e d as it m ay d amage t h e ic. p l e a s e co n t a ct your nearest sales contact , if y ou r e qu ire sp ee d c on tr o l . pa r a m et e r sy mbo l va l u e units fan s upp ly v o lt a ge (co n ti nu o u s ) v dd c o n t 30 v fan s upp ly v o lt a g e (peak < 1 0 0 s) v ddp eak 60 v o u t pu t curr e n t ( c o n ti nu o u s ) i ou t c on t 350 ma o u t pu t curr e n t (p e a k ) i ou tp eak 700 ma f g / r d v o lt a ge v fg/ r d 28 v f g / r d o u t pu t curr e n t ( s i n k) i fg/ r d 20 ma o p e rati n g j un ction t e m p e ra t u re r an ge t j - 40 to 150 c mag n e tic fl u x d e n s ity b u n li m i t e d mt
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 4 of 14 da t as h ee t aug /1 4 6 g e neral el e ct r ical s p e cificati o ns dc op e rati n g p a ra m e te r s t j = 25 c , v d d = 2 4 v ( un l e s s o t h e r w i s e sp e ci f i e d ) pa r a m et e r sy mbo l test c ond i tio n s m i n t y p m ax units fan s upp ly v o lt a ge v dd r e co m m e nd e d o p e rati n g (a v e rag e ) ( 1 ) 9.6 30 v e xt e nd e d op e rati n g volt a ge ( 2 ) v dd fully fu n ctio n al 5 30 v su pp ly c u rre n t i dd 2 4 ma p o we r - on r e se t vol t a g e v p o r 1.8 v o u t pu t dri ve r r e s i s t an ce r d s o n 2 3 o h m s v d d = 5 v 3 5 o h m s o u t pu t c l am p i n g volt a ge v ou t 1 , 2 60 80 v fg / rd o u t pu t l o w v o lt a g e v ol i o l = 10 m a 250 500 mv fg / rd o u t pu t c l amp v o lt a g e v c l a mp 28 v fg / rd o u t pu t leakage curr en t i l ea k v fg ( v rd ) = 18v 10 a t yp ical r o t a ti o n s p ee d r an ge w i th ac t i v e sl op e co n tr o l asl on v d d = 1 2 t o 24v 2 - p ole p air r o t o r m ag n e t 2300 6700 rpm o u t pu t slo p e d u rati o n to t or qu e period r a tio ( 3 , 4 ) sl rat i o v d d = 1 2 t o 24v 6.25 10 % v d d = 5 v 4.2 10 % l o cked ro t or period t on 0.43 se c l o cked ro t or peri od t off 2.6 se c t h e rm a l p r otection le ve l 1 on (5 ) t sd 1 on 140 c t h e rm a l p r otection le ve l 1 o f f t sd 1 off 120 c t h e rm a l p r otection le ve l 2 on t sd 2 on 160 c t h e rm a l p r otection le ve l 2 o f f t sd 2 off 140 c dc the r m al r es i s t an ce r t h - ja o n e - s i d e d p c b , z e ro l fpm 150 c / w r t h - jc 50 vk t h e r m al r es i s t an ce r t h - ja o n e - s i d e d p c b , z e ro l fpm 200 r t h - jc 70 t a b le 2: ge n e r a l el e ctric a l s p e ci f icati on s 1 t h e m ini m a l v alu e o f v d d sh o ul d b e d e t erm in ed u s i n g th e fol l o w in g e q ua t ion : v dd = 9.6v + r c o i l * i dd 2 t h e ex t e nd ed op er at i n g v o l tag e i s t h e r ang e i n w hi ch th e d ev i ce i s a bl e t o s ta r t - u p p r op er l y (do wn t o 5v) w it h f ul l f un c ti o na l it y o f th e d ev i ce ( i n c lud i n g ba s i c fun c ti o n l i k e m agn e t i c fi e l d se n s i n g , fg out p ut , lo c k ed r o to r p r o t e c tion , ...) w it h pot e nt i a l d ev i a tio n vers u s no rm a l op er a t in g c o nd i tion s 3 t h e s l r at i o i s d e fin ed a s th e r a ti o o f t h e slop e du r ati o n o ver th e m oto r to r q u e p er iod , e qu a l t o th e h a l f o f th e e l e c t r i c a l ou t pu t p er io d t o f ou t 1 o r ou t 2 : s l ra t i o t s l o p e t m 2 t s l o p e t ou t 4 w ithi n asl o n r a n g e, s lop e me a s u red f r o m v ds o n t o 100% v dd 5 o utpu t s lop e du r ati o n re du ced t o ha l f it s n o rm a l v alu e
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 5 of 14 da t as h ee t aug /1 4 7 mag n e t ic s pe c if i c a t i o n s dc op e rati n g p a ra m e te r s t j = 25c, v d d = 5 t o 3 0 v (u n l e s s o t h e r w i s e s p e c i f i e d ) pa r a m eter sy mb o l m i n t y p m ax units op er ate p o int b op 0.5 3 6 mt release p o int b rp - 6 - 3 - 0.5 mt hyste r esis b h ys t 2 6 mt t a b le 3: m a g n e tic s p e c i f icati o n s 8 dri v e r ou t p u t vs m a g n e t ic p o le pa r a m et e r test c ond i tio n s o u t1 o u t2 fg ( 6 ) no r th p o le b < b r p C all p a c kages high low high s o u th p o le b > b op - all p a c kages low high low t a b le 4: d r i v e r o u t pu t vs . m a g n e tic p ole ( 7 ) 9 det a i led g e ner a l d e sc r i p t i o n t h e mlx 9 0285 i s a one - c h ip s ol u ti o n for d ri v i n g t w o - coil b r u s h l e s s d c c o oling f a n s . ba se d on m ix e d - s i g n al cm o s d es ign, t h e d ev i ce i n clu d e s h al l - e f fe ct se n s or w ith o ff s e t ca n c e lla t ion s c h e m e , v olt a ge r e g u la t or, d igit a l l o gic an d p o we r o u t pu t d ri ve r s in a s i n gle p ac k age. t h e mlx 9 028 5 - f g v e r s ion h as an o p e n - d rain t a c h o me t e r fg o u t p u t t h at f ollows t h e h all s ign a l. t h i s s ign a l is u se d b y h ar d w are mo n it o ri n g s y s t e m t o d e ter m i n e th e rot a ti o n s p e e d o f th e fa n . in t h e mlx9 0 28 5 - rd v e r s io n , t h e o p e n - d rain al a r m o u t pu t rd i s a s a f e ty s ign a l w h ich a llows d e tec t i n g if t h e f an r o t a t e s or n ot. it is ac t i v e l o w du ri n g n ormal s p i nn i n g o f t h e m ot o r. it goes h igh w h e n t h e m ag n e tic f l u x s w itc h i n g f r e qu e n cy d r op s b e low n e arly 1.15 h z ( 35rpm f or 2 p ol e - p air f a n ) t h e bu il t - in loc k e d r o t o r p r o t e ction a u t o m a t ically s hu ts o f f t h e coil c u rre n t w h e n t h e r o t or is m e c h a n ically b loc k e d f or m ore t h an 0.43 s e co nd . t h e f an tr i e s to r e s t a rt e ve ry 3 s e co nd s un til t h e r o t o r is r e l e a s e d . t h i s o n /o f f c y cli n g r e du c e s t h e a ve ra g e c u rre n t b y factor of a b o u t 7. t h is p r o tection p r e v e n ts th e f a n t o b e o ve r h e a t e d o r d ama g e d. t h e de v ice is b a s e d on t h e m e l e x is p a t e n ted n o - v dd d es ign w h i ch r em o v e s t h e ne e d of se p ara t e s upp ly v olt a g e p in f or two - coil f a n . d u ri n g o p e rati on , t h e p o we r o u t pu t s are a l w a y s o p e rati n g as c o m p l e men t a r y , me a n i n g al s o t h at o n e p o we r o u t pu t is ke p t i n ac t i v e w h i l e t h e ot h e r is ac t i v e . m e l e x i s c l e v e rly t u r n e d t h is f a ct i n to b e n ef it a s n o - v dd de v i c e s su ch as mlx90 2 85 r e co v e r t h e p o we r s upp ly t h r ou gh t h e i n ac t i v e p o we r o u t pu t p i n . t h e r ef o r e , a s e p ara t e s upp ly v olt a ge p in is n ot r e qu ir e d any m ore an d th e d ev ice i n c l ud i n g l o gi c al o u t p u t f g /rd can fit i n to a s m all 4 - p in t h r ou g h - h ole p ac k age vk. in t h e a pp li c a t io n , t h e n o - vdd d es i gn i nh e r e n tly i s ola t e s t h e ic b e h i n d t h e f an coil s . wit h o u t d ir e ct o u t pu t to t h e e xt e r n al e n v iro nm e n t, t h e d ev i c e is b e s t p r o tect e d ag a i n s t e sd an d o ve r - v olt a g e i s s u e o n th e p o w e r s upp ly v olt a ge li n e . 6 fg stat e i s o n l y v al i d du r i n g no rm a l o p er ation . in lo c k ed r o to r p r ot ec t ion , fg s ign a l i s h i g h 7 t h e m agn e ti c pol e i s ap p li ed fa c in g t h e b r and ed s id e o f th e p a c kag e
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 6 of 14 da t as h ee t aug /1 4 b 1 0 u n i q ue fea t ures 10. 1 a ct i ve s o f t s w i tc h i ng t h e u s e o f t h e m e l e xis s o f t s w itc h i n g tech n i que s in t h e u s1 6 8 /169 a n d u s 6 5 1/ 6 61 h as alrea d y p r o ve n its e ff ic i e n cy to n otic e a b ly r e du ce e l e c tr i cal a n d ac ou s tic n oi s e b y p r e ci s e ly co n tr o l t h e o u t pu t s lo p e du rati o n on t h e f an coil. t h e u s1 68/ 1 6 8 is t h e f i r s t g e n e rati o n w ith f i x e d o u t pu t s lo p e du rati o n a n d t h e u s651 / 661 is t h e se co n d g e n e rati o n w ith p o ss i b ility f o r t h e u se r to fin e - t un e th e s l o p e du rati o n v ia an exter n al p i n . t h e m l x90 2 85 r e p r e s e n ts t h e t h ird g e n e rati o n o f s o f t sw i tc h i n g d ev i ce a s it g o e s e ve n a s tep f u rt h e r i n to i n tell i g e n ce a n d sm art d r i v i ng . it mai n ly c o m b i n e s th e m a j or a d v a n t a ge o f each p r e v io u s g e n e rati on : a d j u s t ab le sl op e c o n tr o l ? b es t b al an ce b e t w e e n mo t or p e r f o r m a n ce a n d ac ou s tic / e l e c tric a l n oi s e n o n ee d o f exter n al c o m p o nen t f or s lo p e c on tr o l ? c o s t e ff ici e n cy an d s i m p li c ity a d j u s t ab le w it h o u t e xt e r n al compo n e n t is p o s s i b le as t h e d ev i ce a u t o m a t ically d e t e r mi n e t h e s l o p e du rati o n d e p e nd i n g on t h e fan rot a ti o n spe e d . t h e mlx9 0 285 d e te r m i ne s t h e f an r o t a ti o n s p ee d b y me a suri n g t h e h alf o u t pu t sw it c h i n g p e riod f r o m t h e m ag n e t ic f i e ld s ign a l. t h e o u t pu t s lo p e du rati o n is e xtra p ola t e d b y m e as u r i n g t h e du rati o n f r o m t h e f a l l i n g e d ge on o u t 1 to t h e cr o s s o ve r w ith o u t 2. t h e r e s u lt is p r o c e s s e d to d e ter m i n e t h e ac tu al o u t pu t s lo p e d u rati o n to t or qu e per i od ra t io (s l r a t i o = 2 . t s lo pe / t ou t ), l e a d i n g t o t w o p o ss i b l e op ti on s : if sl r a t i o < 6.2 5 % (t yp ical ) , th e s l o p e du rati o n s hou ld b e i n cr e as e d if sl r a t i o > 6.2 5 % (t yp ica l ), th e s l o p e du rati o n s h o u ld b e d e cr e a s e d t h e dig i t a l sl o p e d u rati o n c o n tr o l r e g i s ter is i n cr em e nt e d or d e c r e m e n t e d a c cor d i n g l y , t hu s upd a t i n g t h e s lo p e d u rati o n v al u e f or b oth ou t pu ts o ut 1 a n d o ut 2, p rior t h e n ext ri s i n g s lo p e o ccur r i n g o n o u t 1 . magnetic field at hall sensor b op (from rotor magne t ) rp digital magnetic field (north or sou t h) ? . t out1 = ? . 7.5ms = 3 . 75ms v out1 v out2 output vol t age output crossover out1 slope dura t ion measurement signal ? t slope = 0 . 15ms ? t slope = 0 . 145ms slope duration t o output swi t ching period ra tio regis t er digital slope dura t ion control regis t er ( 1 n 96 ) sl ratio comparison + decision = 0.3ms / 3.75ms = 8% ? ? slope duration must be decreased n = n 0 (= 53) ? ? t slope = ref . n (= ref . 53 = 0.3ms) t slope = ref . (n 0 - 1) (= ref . 52 = 0 . 29) 1 - all values in green are arbitrary and just given for example purpose 2 - condition example: 4000rpm, 2 - pole pair rotor magnet, initial slope duration = 0.3ms, target sl ratio = 6 . 25% p i c tu re 1 C ac ti ve sof t s w it c h i n g o p e r atio n pr in c i pl e
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 7 of 14 da t as h ee t aug /1 4 on on t h e sl op e co n tr o l p r o v i de s s m ooth c h a n ge in th e coil c u rre n t a n d a llows r e du cing b oth el e ctr i cal a n d a co u s tic n oi se . in add iti on , t h e mlx902 8 5 s l o p e genera t ion is p r o c e s se d u p on r e ac h i n g a p r e ci s e mag n e t i c th r es h old b o p / b r p . u n like o t h e r f an d ri ve r u s i n g th e rot o r m a g n e tic fi e ld a m p lit ud e w h ich m ight lead t o d i ff icul t y in a d e qu a t e r o t o r m a g n e t m ag n e ti s a t i o n , t h e m e l e x is s ol u ti o n p r o v i d e s b es t r e s u lts w ith d i ff e r e n t f an s i ze w i th we a k e r or s tr on g e r r o t o r m ag n e t . 10. 2 be s t p e rf o r m a n ce to n o is e co m prom i s e t h e m l x90 2 85 fe a tu r e s a typ ical 6.2 5 % ratio b e t w ee n s lo p e du rati o n o ve r t h e t o r qu e pe r i o d , p r op orti on al to th e fan r o t a ti o n s p ee d . t h i s v al u e i s co n tr o ll e d to p r o v i d e t h e b es t compr o m i s e b e tw e e n f an p e r f o r m a n ce (ro t a t ion s p ee d a n d c u rre n t co n s u m p ti on ) a n d ac ou s tic n o i s e. i n c r e as i n g t h is ratio m ai n l y low e r s t h e m ot o r e f f ic i e n cy w h ile de cr e a s i n g t h is ratio r e m o v e s t h e l o w n oi s e b e n ef it. sl ratio output slope duration performance low performance 408us 6.25% high performance low noise acoustic noise medium performance high noise 140us 2300 rotation speed 6700 2300 rotation speed (rpm) 6700 p i c tu re 2 C slop e du r a tio n t o t o r qu e p er io d rati o e ff ect t h e de v i c e k e e p s t h i s ratio co n s t an t w it h in a lar g e r o t a t ion s p ee d ra n g e f r o m 2 300 r pm to 670 0 rpm ( 2 - p o l e p a i r f a n ). t h e r e f or e , th e de v i c e au t o m a tically a d j u s ts its l o w n oi s e s p e ci f i ca t ion t o a gi ve n c o oling a pp lica t ion r e qu ir eme n t s . 10. 3 tw o - s t a g e t he rm al pr ot ect i on t h e u s e of s o f t sw itc h i n g t h r o u gh linear s lo p e co n tr o l l e a d s to an i n cr e a s e of t h e ic j u n ction te m pe rat u re . a s a r e su lt, u s i n g lo n g s lo p e a n d h igh o u t pu t c u rre n t can r es u lt in r e a c h i n g t h e t h e r m al p r o t e ction t h r e s h old a n d s o s hu t o f f t h e d e v ice to p r eve n t o v e r h e a t i ng . in t h e a pp l i ca t io n , it w o u ld s t o p a low n oi s e co o l ing f an in an e n v i r on me n t w h e r e co o ling is a r e qu ir e d du e t o h igh te m p e rat u r e . t h e mlx 9 0285 i s th e fi r s t f an d ri ve r to i n tegra t e a tw o - st a g e the r m al p r o tectio n . w h e n t h e ic j un ction t e mp e rat u re e x c e e d s a 1 st t h e r m al t h r e s h old t sd1 (14 0 c t yp ical), t h e s lo p e du rati o n are un co nd iti on ally d i v i d e d to h a l f t h e a ct u al v al u e . t h e i m me d ia t e e f f e ct i s a r e du ction of t h e a v e ra g e p o w e r d i ss i p a t io n , h e n ce it s t ab ili z e s or e v e n s t a rts r e d u cing t h e i c j un ction t em pe rat u re s o t h e co o ling f an co n ti n u e s r o t a ti n g to p r o v i d e a i r f l o w in a s y s t e m . t h e s l o p e du rati o n is b ack t o n ormal w h e n th e jun ction t em p e rat u re d e c r e a s e s b e low t sd 1 of f (12 0 c t yp ical). h o w e ve r, in c a s e t h e r e du cti o n of t h e s lo p e du rati o n is n ot e n o u gh to s t o p t h e j un ction te m p e rat u re i n cr e a se , t h e de v i ce h as a 2 n d t h e rmal t h r e s h old t s d2 (16 0 c t yp ical) w h i ch t h e n s hu t s - o f f t h e i c to p r e v e n t o ve r - h e a t i ng . all t h e o u t pu ts ou t 1, ou t 2 a n d f g / rd g o e s to h i g h l e v e l a n d s t a y in t h is s t a te un til t h e j un ction te m p e rat u re d e c r e a s e s b e low t s d 2 of f ( 140c t yp ical).
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 8 of 14 da t as h ee t aug /1 4 m agne ti c f i e l d ( m t ) i d d ( m a ) r o n ( oh ms ) i dd ( m a ) m agne t i c f i e l d (m t ) r on ( oh ms ) 1 1 p e rforma n ce g r a p h s 11. 1 r d son v s . t j 11. 2 r d son v s . v dd 6 6 5 . 5 5 4 . 5 4 3 . 5 3 2 . 5 2 1 . 5 1 0 . 5 r on , v dd = 5 v r on , v dd = 24 v 5 . 5 5 4 . 5 4 3 . 5 3 2 . 5 2 1 . 5 1 0 . 5 t j = - 40 c t j = 25 c t j = 150 c 0 - 4 0 - 2 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 160 t j ( c) 0 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 30 v d d ( v ol t s ) 11. 3 m a g net i c p arameters v s . t j 11. 4 m a g net i c p arameters v s . v dd 6 6 5 5 4 4 3 3 2 2 1 1 0 0 - 1 - 1 - 2 - 2 - 3 - 3 b op , t j = - 40o c b op , t j = 2 5 c b op , t j = 15 0 c br p , t j = - 4 0 c br p , t j = 25 c br p , t j = 15 0 c - 4 b op , v dd = 5 v b op , v dd = 24 v - 4 br p , v dd = 5 v br p , v dd = 24 v - 5 - 5 - 6 - 4 0 - 2 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 160 t j ( c) - 6 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 30 vd d ( v o lt s) 11. 5 i d d v s . t j 11. 6 i d d v s . v d d 4 4 3 . 5 3 . 5 3 3 2 . 5 2 . 5 2 2 1 . 5 1 . 5 1 0 . 5 i dd , v dd = 5 v i dd , v dd = 24 v 1 0 . 5 i dd , t j = - 40 c i dd , t j = 25 c i dd , t j = 150 c 0 - 4 0 - 2 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 160 t j ( o c ) 0 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 30 vd d ( v o l t s)
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 9 of 14 da t as h ee t aug /1 4 f g/ r d p i n o u t pu t s a t u r a t i o n v o l t a g e , ( m v ) all o w e d po w e r d i ss i pa ti o n ( w) 11. 7 v o l vs t j 11. 8 po w er d i ss i p a t i o n v s . t a 50 0 1 400 0 . 9 0 . 8 t a = 25 d e gc d c - r t h = 15 0 degc / w - p d m a x= 83 3 m w vk - r t h = 20 0 degc / w - p d m a x= 62 5 m w va - r t h = 170 deg c / w - p d m a x= 735 m w 0 . 7 300 0 . 6 0 . 5 200 0 . 4 0 . 3 100 v d s on , v dd = 5 v, i o l = 10 m a v d s on , v dd = 24 v, i o l = 10 m a 0 . 2 0 . 1 t j m a x = 150 d e gc 0 - 4 0 - 2 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 160 t j ( c) 0 - 4 0 - 2 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 160 t j ( c)
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 10 of 14 da t as h ee t aug /1 4 1 2 s t a n d a rd i nfor m a t i o n r e g a rd i ng m a n u f a c t ur a b i l i t y of m e lexis pro d uc t s w i t h d i ff e r e nt s o l d e r i ng p roc e sses o u r p r odu cts a re cl as s i f i e d an d qu alifi e d r e gar d i n g s ol d e r i n g t e c hn olog y , sol d e r a b ility an d moi s t u re se n s iti v ity l e v e l a c cor d i n g to follo w i n g te s t m e t h o d s : ref l o w s o l d e r i n g s m d s ( s ur face m oun t d e vi c es) ipc/ j e d e c j - s t d - 0 2 0 m o i s t u r e / r e f low s e n s it i v ity c l as s i f icati o n for n o nh e r m e tic s olid st a te s u r f ace m oun t d e v i c e s ( c la s s i f i ca t i on r ef l o w p r o f i l e s accor d i n g to t a b le 5 - 2) e ia/ j e d e c j e s d 2 2 - a113 pre c o nd iti on i n g o f n o nh e rm e tic s u r f ace m oun t d e v i c e s p ri or to relia b ility t e s ti n g (r ef l o w p r o f i l e s a ccor d i n g t o t a b le 2) wa v e s o l d e r i n g s m d s ( s ur f a c e m oun t d e vi c es) a n d t h d s ( t hrou g h h o l e d e vi c es) en 607 4 9 - 20 r es i s t a n ce o f p la s ti c - e n ca p s u la t e d smd s t o c o m b i n e d e f f e ct of moi s t u r e an d sol d e ri n g h e at e ia/ j e d e c j e s d 2 2 - b1 0 6 an d e n 607 4 9 - 15 r es i s t an ce t o s ol d e ri n g te m pe rat u re for t h r ou g h - h ole mo u n ted d ev i c e s i ro n s o l d e r i n g t h d s ( t hrou g h h o l e d e v i c es) en 607 4 9 - 15 r es i s t a n ce t o s ol d e ri n g te m pe rat u re for t h r ou g h - h ole mo u n ted d ev i c e s s o l d e r a b ili t y s m d s ( s ur face m oun t d e vi c es) a n d th d s ( t hrou g h h o l e d e vi c es) e ia/ j e d e c j e s d 2 2 - b1 0 2 an d e n 607 4 9 - 21 sol d e ra b ility for all s ol d e ri n g te c hn ologi e s d ev ia t i n g fr o m ab o v e me n ti o n e d s t and ard c ond iti on s (re g a r d i n g p e ak t em p e rat u r e , te m p e rat u re g ra d i e n t, t em pe rat u re p r o f ile et c ) add iti on al cla ss i f icati o n an d qu alificati o n t es ts h a v e t o b e a gr e e d up on with m e l e x i s . t h e app li c a t ion o f w a v e s o l d e ri n g for s m ds i s a llo w e d on ly a f ter co n s u l ti n g me l e x i s r e g ar d i n g a ss u ra n ce o f adhe s i v e s tre n gth b e t w ee n de v i c e an d b oar d . m e l e x is i s c on tri bu ti n g t o gl ob al e n v iro nm e n t a l c on se r v a t i o n b y p r o m oti n g l ead f r ee s ol u ti on s . for m ore i n f orma t ion o n qu ali ficati on s o f r oh s compl i a n t p r odu cts (ro h s = eu r op e an d ir e cti v e o n th e r es tr i ction o f th e u s e o f cert a in h a z ar d o u s su b s t an c e s ) p l e a s e v i s it t h e q u ali t y p age o n ou r we b s ite: h t t p : / / w ww . me l e x i s .co m / qu alit y . a s p x 1 3 e s d p r e ca ut i o n s e l e ctr on ic s em ico ndu ct o r p r o du c ts a re s e n s it i v e t o e l e ctro st a tic di s c h ar g e ( e s d ). al w a y s obs e r v e e l e ctro s t a t ic di s c h ar g e c on tr o l p r o c e du r e s w h e ne ve r h a nd ling s em ico n d u ct o r p r odu ct s .
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 11 of 14 da t as h ee t aug /1 4 - 1 + 2 e.d.m process s u r f a c e r o1.6 ~ 2.4u m 1.42 + / - 0.10 3.65 + / - 0.10 2.5 m i n see note 3 10.50 + / - 0.30 1 4 pac k a g e s inf o r ma t i o n ( ou t l i ne draw i n g , h a ll p l a t e l o c a t i o n & pinout) 14. 1 vk package ( 4 - p i n t o 9 2) 5.22 + / - 0 . 10 4.20 + / - 0 . 10 1.55 + / - 0 . 10 0.73 + / - 0 . 10 n o t e s : 1. all d i m e n s i on s are i n m illi m e t e r s 0.00 0.20 + 0 . 02 0.46 - 0 . 03 3 +2 (2x) 5 +2 ( 2 x ) 2. pa ckage d i m e n s i on e x c l ud e m o l d i ng f l a s h. m o l d f l a s h s h a ll not exceed 0.127 mm . 3. to preserve r e li a b ili ty , it i s recommended t o h a v e t o t a l l ea d l e ng t h e qu a l to 2.5mm m i n i m u m , measured from the package li n e . 4. vk package i s a p i n t h r ough - ho l e p a c k a g e , hence adapted for wave s o l d e r i ng p r o c e ss . a r e f l o w s o l d e r i ng process i s not r e c o mm e nd e d w i t h vk package as it may s e r i ou s l y a ff e c t d e v i c e r e li a b ili ty . 1.27 + / - 0 . 03 3.81 + / - 0 . 03 0.38 + / - 0 . 03 0.38 + / - 0 . 03 m a rk i ng : top s i d e : 1 st l i n e = 285fg (or 285rd) C part nu m b e r (mlx90285) and o p t i on c od e 2 nd l i n e - xxyww C xx = lot nu m b e r y = year ( l a s t d i g i t) ww = c a l e nd a r w ee k 5 - 1 ( 2 x ) 0.30 + / - 0 . 10 ( 2 x ) 3 + 2 ( 2 x ) h a ll p l a t e l o c a t i on 2.25 + / - 0 . 13 0.52 1.05 + / - 0 . 13 n o t e s : 1. all d i m e n s i on s are i n m illi m e t e r s p i n numb er ( v k ) p i n n a m e f unc tion 1 f g ( r d ) f g ( r d ) o p en d r ain o u tp u t sig n al 2 ou t 1 op e n d r ain coil d r i ver 1 3 ou t 2 op e n d r ain coil d r i ver 2 4 gnd g r o u nd pin
mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 390 1 0 9 0285 r ev . 0 05 p a ge 12 of 14 da t as h ee t aug /1 4 0 . 64 4 . 93 + 0 . 08 1 . 47 - 0 . 07 5 . 99 + 0 . 2 1 - 0 . 15 1.9 2.0 + 0 . 10 1 . 6 3 - 0 . 0 8 3 . 9 4 + 0 . 05 - 0 . 13 s e e n o t e 5 0.45 14. 2 dc package ( 8 - p i n narr o w s o i c) 8 7 6 5 1 2 3 4 see not e 2 addition + 0 . 05 - 0 . 13 see not e 5 parting line 5 + 3 - 5 + 0 . 25 - 0 . 23 see not e 4 detail a h x 4 5 notes : 1. controlling dimensions in millimeters. 2. the appearance of pin 1 is optional, round type on single leadframe and rectangular type on matrix leadframe. 3. formed leads shall be planar with respect to one another within 0.0792mm at seating plane. 4. length of terminal for soldering to a substrate. 5. package length and width are reference datums and do not include mold flash or protrusions, but does include mold mismatch and are measured at the mold parting line. mold flash or protrusions shall not exceed 0.1524mm at end and 0.254mm at window. 6. this part is compliant with jedec standard ms - 012. marking: top side : + 0 . 08 1 . 27 bsc 0 . 4 1 - 0 . 06 seating plane see not e 3 see detail a + 0 . 05 0 . 2 5 - 0 . 06 1 st line = mlx285 C part number (mlx90285) 2 nd line = fgyyww (or rd yyww) C option code and datecode (yy - year ww - calendar week) 3 rd line = xxxxxx C lot number marking on top side is duplicated on bottom side hall plate location 8 7 6 5 notes : 1. all dimensions are in millimeters. 1 2 3 4 2.4 2.5 package outline p i n numb e r ( d c) p i n n a m e f unc tion 1 f g ( r d ) f g ( r d ) o p en d r ain o u tp u t sig n al 2 ou t 1 op e n d r ain coil d r i ver 1 3 gnd g r o u nd pin 4 ou t 2 op e n d r ain coil d r i ver 2 5, 6, 7, 8 - not co n n e cted
390 1 0 9 0285 r ev . 0 05 p a ge 13 of 14 da t as h ee t aug /1 4 mlx90 2 85 2 4 v l ow no i se tw o - c o i l f a n driver 1 5 disclaimer devices sold by melexis are covered by the warranty and patent indemnification provisions appearing in its term of sale. melexis makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. melexis reserves the right to ch ange specifications and prices at any time and without notice. therefore, prior to designing this product into a system, it is necessary to check with melexis for current information. this product is intended for use in normal commercial applications. appl ications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life - support or life - sustaining equipment are specifically not recommended without additional processing by melex is for each application. the information furnished by melexis is believed to be correct and accurate. however, melexis shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. no obligation or liability to recipi ent or any third party shall arise or flow out of melexis rendering of technical or other services. ? melexis nv. all rights reserved. for the latest version of this document, go to our website at www.melexis.com

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