ics for cd/cd-rom player n overview the AN8387S is an ic which incorporates 2 circuits of btl drivers for driving various dc motors such as actua- tors (focus, tracking traverse), spindles, and loading of the cd players. n features ? operating supply voltage range ; v cc =3.5v to 9v pv cc =1.5v to 9v ? built-in 2 circuits of voltage driven btl drivers (maximun drive current : 500ma) ? quiescent current (current consumption at no input) ; 3.2ma ? provided with power control pin ? provided with driver output voltage limiting pin ? built-in thermal protective circuit (operating temperature : 160? typ.) n applications linear driving of the dc motors and actuators of the cd players. cd radio cassette tape recorders, and so on. AN8387S 2-channel linear driver unit : mm 0.1 0.1 2.05 0.2 (0.4) 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 0.4 0.25 1.27 12.63 0.3 5.5 0.3 7.6 0.3 (0.4) 0.9 0.25 0.2 + 0.1 ?0.05 0.9 0.25 20-lead sop package (sop020-p-0300a) 8 9 4 3 2 c 14 13 17 18 7 11 a 20 b + + gnd v cc p.v cc p.gnd base current control btl absolute value thermal shutdown v ref sw base power control absolute value btl 10k 1k a) v cc : pin1, pin10 b) p.v cc : pin12, pin19 c) pgnd : pin5, pin6, pin15, pin16 n block diagram
ics f or cd/cd-r om pla y er AN8387S v c c p d t o p r t s t g s u p p l y v o l t a g e p o w e r d i s s i p a t i o n o p e r a t i n g a m b i e n t t e m p e r a t u r e s t o r a g e t e m p e r a t u r e v m w ? c ? c p a r a m e t e r s y m b o l r a t i n g u n i t 1 0 1 , 2 0 0 n o t e ) 3 0 ~ + 8 5 5 5 ~ + 1 2 5 n o t e ) w h e n m o u n t e d o n t o t h e g l a s s e p o x y p c b ( 5 0 m m 5 0 m m 0 . 8 m m ) n a b s o l u t e m a x i m u m r a t i n g s ( t a = 2 5 ? c ) p a r a m e t e r s y m b o l r a n g e o p e r a t i n g s u p p l y v o l t a g e r a n g e v c c p . v c c 3 . 5 v ~ 9 v 1 . 5 v ~ 9 v n r e c o m m e n d e d o p e r a t i n g r a n g e ( t a = 2 5 ? c ) c u r r e n t c o n s u m p t i o n a t n o i n p u t ( v c c ) c u r r e n t c o n s u m p t i o n a t n o i n p u t ( p v c c ) p v c c l e a k c u r r e n t v r e f t h r e s h o l d ( h ) n o t e 1 ) v r e f t h r e s h o l d ( l ) n o t e 2 ) i n p u t a m p . i n p u t i m p e d a n c e d r i v e r i n p u t o f f s e t v o l t a g e n o t e 3 ) d r i v e r o u t p u t o f f s e t v o l t a g e n o t e 3 ) d r i v e r d e a d z o n e w i d t h n o t e 3 ) d r i v e r t r a n s f e r g a i n ( + ) n o t e 3 ) d r i v e r ( + ) , ( ) t r a n s f e r g a i n r a t i o n o t e 3 ) d r i v e r o u t p u t v o l t a g e d r i v e r o u t p u t v o l t a g e a b s o l u t e v a l u e d r i v e r p o w e r t r a n s i s t o r s a t u r a t i o n v o l t a g e p c i n p u t p i n t h r e s h o l d v o l t a g e ( h ) n o t e 4 ) p c i n p u t p i n t h r e s h o l d v o l t a g e ( l ) n o t e 5 ) p r o t e c t i v e d i o d e f o r w a r d v o l t a g e t h e r m a l p r o t e c t i v e c i r c u i t o p e r a t i n g t e m p e r a t u r e i v c c q i p v c c q i p v c c l v r e f h v r e f l r a i n v i o f f s e t v o o f f s e t | v d z | g + r g v o l g | v o l | v s a t v p c t h h v p c t h l v p d t t h d v c c = 9 v , v r e f = 4 . 5 v , p v c c = 9 v v c c = 9 v , v r e f = 4 . 5 v , p v c c = 9 v v c c = 0 v , v r e f = o p e n , p v c c = 1 0 v v c c = 3 v , p v c c = 1 0 v , v i n = 0 v v c c = 3 v , p v c c = 1 0 v , v i n = 0 v v c c = 9 v , v r e f = 4 . 5 v , p v c c = 9 v v c c = 9 v , v r e f = 4 . 5 v , p v c c = 9 v v c c = 9 v , v r e f = 4 . 5 v , p v c c = 9 v v c c = 9 v , v r e f = 4 . 5 v , p v c c = 9 v v c c = 9 v , v r e f = 4 . 5 v , p v c c = 9 v 1 0 . 7 1 . 4 5 0 . 7 5 1 0 5 5 1 0 1 3 1 . 9 1 3 0 2 . 2 5 2 . 8 0 . 9 2 1 . 2 1 0 0 1 5 . 1 0 . 9 0 . 2 9 1 . 5 1 6 0 3 . 5 3 . 5 1 1 1 . 2 5 1 0 5 5 1 9 1 7 0 . 5 1 3 0 3 0 . 3 8 0 . 8 1 . 8 m a m a a v v k m v m v m v d b d b m v v v v v v ? c p a r a m e t e r s y m b o l c o n d i t i o n m i n . t y p . m a x . u n i t n e l e c t r i c a l c h a r a c t e r i s t i c s ( t a = 2 5 ? c ) v c c = 9 v , v r e f = 4 . 5 v , p v c c = 9 v , v l i m = 0 v i o = 3 0 0 m a v c c = 9 v , v r e f = 4 . 5 v , p v c c = 9 v , v l i m = 3 v v c c = 9 v , v r e f = 4 . 5 v , p v c c = 9 v , i o = 3 0 0 m a v c c = 9 v , v r e f = 2 . 5 v , p v c c = 5 v , v i n = 2 . 3 v v c c = 9 v , v r e f = 2 . 5 v , p v c c = 5 v , v i n = 2 . 3 v v c c = 5 v , v r e f = 2 . 5 v , v i n = 2 . 4 ? 2 . 6 v n o t e 1 ) v r e f v o l t a g e r e q u i r e d t o o p e r a t e t h e d r i v e r . n o t e 2 ) i f v r e f i s m a d e l o w e r t h a n t h i s v o l t a g e , t h e d r i v e r d o s e n o t o p e r a t e . n o t e 3 ) r e f e r t o t h e d r i v e r i n p u t / o u t p u t c h a r a c t e r i s t i c s c h a r t . n o t e 4 ) i f t h e p c p i n v o l t a g e i s m a d e h i g h e r t h a n t h i s v o l t a g e , t h e r e w i l l b e n o o u t p u t v o l t a g e f r o m t h e d r i v e r . b o t h ( + ) a n d ( ) o u t p u t s a r e p u l l i n g i n t h e c u r r e n t . n o t e 5 ) i f t h e p c p i n v o l t a g e i s m a d e l o w e r t h a n t h i s v o l t a g e , t h e d r i v e r o p e r a t e s n o r m a l l y .
ics f or cd/cd-r om pla y er AN8387S 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 1 2 3 4 5 6 7 8 9 1 0 m m a n 8 3 8 7 s p v c c v c c e r r o r s i g n a l 1 v r e f e r r o r s i g n a l 2 n p i n d e s c r i p t i o n s d e s c r i p t i o n e q u i v a l e n t c i r c u i t d c v o l t a g e p i n n o . s y m b o l 1 1 0 v c c i / o i 4 . 8 v 2 i n 1 i 2 . 5 v 9 i n 2 i 2 . 5 v 3 p c 1 i 0 v 8 p c 2 i 0 v v c c p i n . n o t c o n n e c t e d t o t h e p v c c p i n . e r r o r s i g n a l i n p u t p i n f o r t h e c h a n n e l - 1 d r i v e r e r r o r s i g n a l i n p u t p i n f o r t h e c h a n n e l - 2 d r i v e r i n p u t p i n f o r t h e p c ( i n t e r - o u t p u t v o l t a g e o f t h e c h a n n e l - 1 d r i v e r o f f ) i n p u t p i n f o r t h e p c ( i n t e r - o u t p u t v o l t a g e o f t h e c h a n n e l - 2 d r i v e r o f f ) + 1 k o r 5 0 k 1 0 0 k 1 k o r 1 1 0 2 9 4 3 8 o p e r a t i o n a l a m p l i f i e r i s o f p n p d i f f e r e n t i a l i n p u t n application circuit
ics f or cd/cd-r om pla y er AN8387S n p i n d e s c r i p t i o n s ( c o n t . ) d e s c r i p t i o n e q u i v a l e n t c i r c u i t d c v o l t a g e p i n n o . s y m b o l v r e f i / o i 2 . 5 v 5 6 1 5 1 6 p . g n d o 0 v 7 g n d o 0 v 1 1 v l i m 2 i v c c 2 0 v l i m 1 i v c c v l i m p i n f o r t h e c h a n n e l - 2 d r i v e r . u s e d w h e n l i m i t i n g t h e o u t p u t v o l t a g e o f t h e p i n s 1 3 a n d 1 4 4 v r e f i n p u t p i n p . g n d p i n g n d p i n v l i m p i n f o r t h e c h a n n e l - 1 d r i v e r . u s e d w h e n l i m i t i n g t h e o u t p u t v o l t a g e o f t h e p i n s 1 7 a n d 1 8 1 2 1 9 p v c c i 3 v p o w e r v c c p i n . s u p p l i e s t h e d r i v e r c u r r e n t . 3 0 k 4 0 k p g n d o r v c c p v c c p g n d 2 4 5 6 1 5 1 6 7 1 1 2 0 1 2 1 9
ics f or cd/cd-r om pla y er AN8387S d e s c r i p t i o n e q u i v a l e n t c i r c u i t d c v o l t a g e p i n n o . s y m b o l d 2 + i / o o ( 2 . 7 v ) 1 4 d 2 o ( 0 . 3 v ) 1 7 d 1 o ( 0 . 3 v ) 1 8 d 1 + o ( 2 . 7 v ) 1 3 n o n - i n v e r t i n g o u t p u t p i n f o r t h e c h a n n e l - 2 d r i v e r i n v e r t i n g o u t p u t p i n f o r t h e c h a n n e l - 2 d r i v e r i n v e r t i n g o u t p u t p i n f o r t h e c h a n n e l - 1 d r i v e r n o n - i n v e r t i n g o u t p u t p i n f o r t h e c h a n n e l - 1 d r i v e r o r o r p v c c p g n d 1 3 1 8 1 4 1 7 n p i n d e s c r i p t i o n s ( c o n t . ) o p e r a t i o n a l d e s c r i p t i o n t h e a n 8 3 8 7 s i n c o r p o r a t e s t h e t w o c h a n n e l s o f d r i v e r s . s i n c e b o t h c h a n n e l s h a v e t h e i d e n t i c a l f u n c t i o n s , t h e f o l l o w i n g d e s c r i b e s t h e c h a n n e l - 1 d r i v e r . b l o c k d i a g r a m ( c h a n n e l 1 d r i v e r ) a n e r r o r s i g n a l ( v i n ) i n p u t t o t h e p i n 2 i s c o n v e r t e d i n t o t h e a b s o l u t e v a l u e i n p u t c u r r e n t i a t h r o u g h t h e e r r o r a m p l i f i e r a n d c u r r e n t a b s o l u t e v a l u e c i r c u i t . t h e v a l u e o f i a i s a s f o l l o w s . + r i n 1 7 1 8 1 9 2 0 d i r e c t i o n d e c i s i o n s w . a s w . b s w . c i a i a i a v r e f s . w a t h e r m a l s h u t d o w n p c s w . a s w . b i a = 0 s w . b s w . c q 1 q 2 r 1 5 7 . 6 k r 2 5 7 . 6 k s w . c q 3 1 k + 1 2 4 3 q 4 + p v c c v l i m c u r r e n t a b s o l u t e v a l u e c i r c u i t ( r l = 8 . 2 ) 2 e r r o r a m p . n s u p p l e m e n t a r y e x p l a n a t i o n v r e f ( = v c c )
ics f or cd/cd-r om pla y er AN8387S i a = r i n + 1 k | v i n v r e f | ( v + v ) = r i n + 1 k 5 7 . 6 k ( v i n v r e f ) g = ( v + v ) ( v i n v r e f ) 1 k + r i n 5 7 . 6 k = v | i s l i m i t e d w i t h i n t h e f o l l o w i n g r a n g e . 2 . 2 5 v | v + v | 3 v w h e n t h e p i n 2 0 i s s h o r t - c i r c u i t e d t o g n d , | v + v | 1 3 0 m v r e s u l t s r e g a r d l e s s o f a n i n p u t e r r o r s i g n a l ( v i n ) . i f t h e p i n 2 0 i s p r e p a r e d t o s h o r t - c i r c u i t t o g n d a t p o w e r - o n o f t h e s e t , i t c a n b e u s e d t o p r e v e n t o p e r a t i o n e r r o r a t p o w e r - o n o f t h e m o t o r o r a c t u a t o r . w h e n t h e p i n 2 0 i s n o t u s e d , s h o r t - c i r c u i t i t t o t h e p i n s 1 a n d 1 0 . t h e p i n 3 i s a p c p i n . i f a v o l t a g e o f 2 . 8 v o r m o r e i s a p p l i e d t o t h i s p i n , s w . b a n d s w . c a r e t u r n e d o n , i a b e c o m e s 0 m a , a n d t h e b a s e c u r r e n t f l o w s t o t h e b a s e s o f q 3 a n d q 4 s i m u l t a n e o u s l y t o t u r n o n q 3 a n d q 4 . a s a r e s u l t , t h e p i n s 1 7 a n d 1 8 a r e a l m o s t s h o r t - c i r c u i t e d t o p . g n d . t h i s i c i n c o r p o r a t e s t h e t h e r m a l s h u t d o w n c i r c u i t . i f t h e c h i p t e m p e r a t u r e o f t h e i c c o m e s t o a b o u t 1 6 0 ? c , b o t h d r i v e r s o f t h e t w o c h a n n e l s a r e t u r n e d o f f . ( t h e o u t p u t p i n s 1 7 , 1 8 , 1 4 , a n d 1 3 a r e s h o r t - c i r c u i t e d t o p . g n d ) s i m i l a r l y , i f t h e a p p l i e d v o l t a g e ( v r e f ) o f t h e v r e f p i n 4 c o m e s t o 1 v o r l e s s , b o t h d r i v e r s o f t h e t w o c h a n n e l s a r e t u r n e d o f f . t h e o u t p u t v o l t a g e v _ o f t h e p i n 1 7 a n d v + o f t h e p i n 1 8 c a n b e l i m i t e d b y a p p l y i n g a v o l t a g e t o t h e v l i m p i n 2 0 . f o r e x a m p l e , i f a v o l t a g e o f 3 v i s a p p l i e d t o t h e p i n 2 0 w h e n v c c = 9 v a n d r l = 8 . 2 , t h e m a x i m u m v a l u e o f | v + w h e n m o u n t e d t o p c b : a m b i e n t t e m p e r a t u r e t a ( ? c ) p o w e r d i s s i p a t i o n p d ( m w ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 0 2 0 0 4 0 0 6 0 0 8 0 0 1 0 0 0 1 2 0 0 1 4 0 0 1 6 0 0 1 8 0 0 2 0 0 0 m a t e r i a l . g l a s s e p o x y p c b . s i z e 5 c m 5 c m 0 . 8 m m q j a = 8 3 . 3 ? c / w 0 . 2 5 v c b 1 b 2 | v d z | 4 . 4 3 v 4 . 4 5 v 0 . 2 5 v v i o f v 1 , v 2 o u t p u t b 4 g b 5 i n p u t 4 . 5 v b 3 4 . 5 5 v 4 . 5 7 v v i n v c c = 9 v p . v c c = 9 v v r e f = 4 . 5 v v o o f g + = b 5 b 4 2 0 m v g = b 2 b 1 2 0 m v r g = g + g d r i v e r i n p u t / o u t p u t c h a r a c t e r i s t i c s i n p u t o f f s e t ( v i o f ) o u t p u t o f f s e t ( v o o f ) d e a d z o n e ( | v d z | ) t r a n s f e r g a i n ( + ) ( g + ) ( + ) , ( ) t r a n s f e r g a i n r a t i o ( r g ) c h a r a c t e r i s t i c s c u r v e p d t a , , t h e r e f o r e , t h e d r i v e r s g a i n g w i l l b e a s f o l l o w s . ( w h e n t h e m o t o r l o a d r l i s 8 . 2 ) + 1 ) w h e n v i n > v r e f , t h e d i r e c t i o n d e t e r m i n i n g c i r c u i t o p e r a t e s s o t h a t t h e f o l l o w i n g c o n d i t i o n s a r e m e t . s w . a : s w . b : o n s w . c : o f f 2 ) w h e n v i n < v r e f , t h e d i r e c t i o n d e t e r m i n i n g c i r c u i t o p e r a t e s s o t h a t t h e f o l l o w i n g c o n d i t i o n s a r e m e t . s w . a : s w . b : o f f s w . c : o n t h e o u t p u t ( v + v ) b e t w e e n t h e p i n s 1 8 a n d 1 7 h a s t h e f o l l o w i n g r e l a t i o n w i t h t h e i n p u t ( v i n v r e f ) b e t w e e n t h e p i n s 2 a n d 4 .
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