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key features applications 3w output at 10% thd with a 4 load and 5v power supply filterless, low quiescent current and low emi low thd+n power limit function to protect speaker when occuring large input, 5% power limit accuracy 64-step dc volume control from -45db to 24db headphone output function 12db effective noise reduction superior low noise: 30uv minimize pop/clip noise high efficiency up to 90% auto recovery short circuit protection thermal shutdown lcd monitors / tv projectors notebook/all-in-one computers p ortable speakers portable dvd players, game machines power limit technology which suppress the output signal clip automatically due to the over level input signal. 12db nosie attenuation . this circuit may help eliminate external filtering, thereby saving the board space and components cost. t h e pa m 8 0 1 0 f e a t u r e s s c p ( s h o r t c i r c u i t protection), otp and thermal shutdown. n n n n general description the PAM8010 is a 3w, class-d audio amplifier with headphone amplifier. advanced 64- step dc volume control minimizes external components a n d a l l o w s s p e a k e r v o l u m e c o n t r o l a n d headphone volume control. integrated it offers low thd+n, to produce high-quality sound reproduction. PAM8010 has an additional noise reduction circuit which achieve the PAM8010 is available in ssop-24 and sop- 24 package. n n n n n n n n n n n n n pb-free package PAM8010 3w stereo class-d with dc volume, headphone and power limit 1 www.poweranalog.com typical application , power analog microelectronics inc 05/2011 rev1.0 s h d n m u t e _ d v o l o n s h d n o n 1 u f p v d d r p v d d r r 1 v t h 1 u f p l v d d r 2 1 u f 2 2 0 u f 2 2 0 u f r t h 3 . 3 v / 5 v m u t e 1 u f p v d d l e a r i n l e a r i n r m u t e _ a b h : o p e r a t i o n l : m u t e ( d e f a u l t ) e a r o u t r e a r o u t l + o u t _ r - o u t _ r v r e f + o u t _ l - o u t _ l a v d d v 2 p 5 d c v o l u m e 1 u f p v d d l h e a d p h o n e 1 2 3 p g n d l 0 . 4 7 u f i n l p g n d r 0 . 4 7 u f i n r a g n d 0 . 4 7 u f 0 . 4 7 u f i n l i n r p a m 8 0 1 0
2 pin configuration & marking information x: internal code y: year ww: week ll: internal code , power analog microelectronics inc www.poweranalog.com block diagram ssop24/sop24 top view 05/2011 rev1.0 PAM8010 3w stereo class-d with dc volume, headphone and power limit -out_l pgndl +out_l pvddl agnd inl earinl pl vref earoutl earoutr vol earinr vth shdn pvddr +out_r pgndr -out_r 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 19 20 21 22 23 24 avdd mute_ab mute_d v2p5 inr vdd/2 vdd/2 avdd inr mute_ab inl agnd pvddr pgndr -out_l +out_l v2p5 -out_r +out_r pgndl pvddl modulator driver internal oscillator osc bias and references modulator driver thermal protection current protection + - + - headphone earoutr headphone earoutl vol earinr earinl vref mute_d pl vth shdn avdd gnd + - - + gnd
pin descriptions 3 absolute maximum ratings these are stress ratings only and functional operation is not implied exposure to absolute maximum ratings for prolonged time periods may affect device reliability all voltages are with respect to ground . . . , power analog microelectronics inc www.poweranalog.com p i n n u m b e r p i n n a m e d e s c r i p t i o n 1 - o u t _ l l e f t c h a n n e l n e g a t i v e o u t p u t 2 p g n d l l e f t c h a n n e l p o w e r g n d 3 + o u t _ l l e f t c h a n n e l p o s i t i v e o u t p u t 4 p v d d l l e f t c h a n n e l p o w e r s u p p l y 5 s h d n f u l l c h i p s h u t d o w n c o n t r o l i n p u t ( a c t i v e l o w ) p u l l - u p 6 a v d d a n a l o g v d d 7 v r e f r e f e r e n c e v o l t a g e b o t h f o r d c v o l u m e c o n t r o l a n d p o w e r l i m i t s e c t i o n 8 p l c o n n e c t a r e s i s t o r d i v i d e r f r o m v r e f t o g n d f o r p o w e r l i m i t s e t t i n g 9 e a r i n l l e f t e a r p h o n e i n p u t 1 0 i n l l e f t c h a n n e l i n p u t 1 1 v o l a p p l y d c v o l t a g e a t t h i s p i n t o s e t t h e g a i n b o t h o f c l a s s d a n d c l a s s a b 1 2 e a r o u t l l e f t e a r p h o n e o u t p u t ( n o n - i n v e r t i n g ) 1 3 e a r o u t r r i g h t e a r p h o n e o u t p u t ( n o n - i n v e r t i n g ) 1 4 v 2 p 5 i n t e r n a l a n a l o g r e f e r e n c e , c o n n e c t a b y p a s s c a p a c i t o r f r o m v 2 p 5 t o g n d 1 5 i n r r i g h t c h a n n e l i n p u t 1 6 e a r i n r r i g h t e a r p h o n e i n p u t 1 7 m u t e _ a b m u t e c o n t r o l o f c l a s s a b s e c t i o n ( a c t i v e l o w ) p u l l - u p 1 8 v t h c o n n e c t a r e s i s t o r f r o m v t h t o g n d f o r n o i s e t h r e s h o l d s e t t i n g 1 9 a g n d a n a l o g g n d 2 0 m u t e _ d m u t e c o n t r o l o f c l a s s d s e c t i o n ( a c t i v e h i g h ) , p u l l - d o w n 2 1 p v d d r r i g h t c h a n n e l p o w e r s u p p l y 2 2 + o u t _ r r i g h t c h a n n e l p o s i t i v e o u t p u t 2 3 p g n d r r i g h t c h a n n e l p o w e r g n d 2 4 - o u t _ r r i g h t c h a n n e l n e g a t i v e o u t p u t supply voltage ............................................6.0v operation junction temperature ....- 40 to 125 storage temperature.....................-65c to 150 soldering temperature....................... input voltage.............................-0.3v to v +0.3v c c c 300c,5sec dd recommended operating conditions supply voltage range....................... junction temperature rang...........-20 to 125 ambient operation temperature range............................................-20 to 85 2.5v to 5.5v c c c c p a r a m e t e r s y m b o l p a c k a g e m a x i m u m u n i t t h e r m a l r e s i s t a n c e ( j u n c t i o n t o a m b i e n t ) j a s s o p - 2 4 9 6 c / w t h e r m a l r e s i s t a n c e ( j u n c t i o n t o a m b i e n t ) j a s o p - 2 4 7 9 . 2 c / w thermal information 05/2011 rev1.0 PAM8010 3w stereo class-d with dc volume, headphone and power limit
4 electrical characteristic v =5v, gain = maximum, r =8 t =25c unless otherwise noted. dd l a , , power analog microelectronics inc www.poweranalog.com p a r a m e t e r s y m b o l c o n d i t i o n s m i n t y p m a x u n i t s c l a s s d s t a g e s u p p l y v o l t a g e r a n g e v d d 2 . 5 5 . 5 v q u i e s c e n t c u r r e n t i q n o l o a d 1 0 1 5 m a o u t p u t o f f s e t v o l t a g e v o s n o l o a d 3 0 m v p m o s f e t 0 . 2 1 d r a i n - s o u r c e o n - s t a t e r e s i s t a n c e r d s ( o n ) i d s = 0 . 5 a n m o s f e t 0 . 1 7 r l = 8 1 . 5 5 1 . 7 o u t p u t p o w e r p o t h d + n = 1 0 % , f = 1 k h z r l = 4 2 . 8 5 3 . 0 w r l = 8 p o = 0 . 8 5 w , f = 1 k h z 0 . 0 8 t o t a l h a r m o n i c d i s t o r t i o n p l u s n o i s e t h d + n r l = 4 p o = 1 . 7 5 w , f = 1 k h z 0 . 0 8 % p o w e r s u p p l y r i p p l e r e j e c t i o n p s r r i n p u t a c - g n d , f = 1 k h z , v p p = 2 0 0 m v 7 0 d b c h a n n e l s e p a r a t i o n c s p o = 1 w , f = 1 k h z - 9 5 d b o s c i l l a t o r f r e q u e n c y f o s c 2 0 0 2 5 0 3 0 0 k h z p o = 1 . 7 w , f = 1 k h z , r l = 8 8 5 9 0 % e f f i c i e n c y p o = 3 . 0 w , f = 1 k h z , r l = 4 8 0 8 3 % a - w e i g h t i n g 6 0 n o i s e v n i n p u t a c - g n d n o a - w e i g h t i n g 8 0 u v s i g n a l n o i s e r a t i o s n r f = 2 0 - 2 0 k h z , t h d = 1 % 9 5 d b e a r p h o n e s t a g e o u t p u t o f f s e t v o l t a g e v o s n o l o a d 2 . 4 5 2 . 5 2 . 5 5 v o u t p u t p o w e r p o t h d + n = 1 % , r l = 3 2 , f = 1 k h z 6 0 m w t o t a l h a r m o n i c d i s t o r t i o n p l u s n o i s e t h d + n r l = 3 2 p o = 1 0 m w , f = 1 k h z 0 . 0 2 % p o w e r s u p p l y r i p p l e r e j e c t i o n p s r r i n p u t a c - g n d , f = 1 k h z , v p p = 2 0 0 m v 8 0 d b c h a n n e l s e p a r a t i o n c s v o = 1 v , f = 1 k h z - 9 5 d b a - w e i g h t i n g 2 0 n o i s e v n i n p u t a c - g n d n o a - w e i g h t i n g 3 5 u v s i g n a l n o i s e r a t i o s n r f = 2 0 - 2 0 k h z , t h d = 1 % 9 5 d b c o n t r o l s e c t i o n m u t e c u r r e n t i m u t e m u t e _ d = v d d , m u t e _ a b = g n d 7 1 0 m a m u t e c l a s s d e a r p h o n e c u r r e n t i m u t e _ d m u t e _ d = v d d , m u t e _ a b = v d d 7 1 0 m a m u t e c l a s s a b e a r p h o n e c u r r e n t i m u t e _ a b m u t e _ d = g n d , m u t e _ a b = v d d 9 1 0 m a s h u t d o w n c u r r e n t i s h d n v s h d n = 0 v 1 a l o g i c i n p u t h i g h v i h 1 . 4 l o g i c i n p u t l o w v i l 0 . 6 v o v e r t e m p e r a t u r e p r o t e c t i o n o t p 1 5 0 c o v e r t e m p e r a t u r e h y s t e r e s i s o t h 4 0 c 05/2011 rev1.0 PAM8010 3w stereo class-d with dc volume, headphone and power limit
0 . 06 50 0 . 1 0 . 2 0 . 5 1 2 5 10 20 % 1 m 3 2 m 5 m 10 m 20 m 50 m 100 m 200 m 500 m 1 2 w 5 typical operating characteristics (t =25c) a v =5v,r =8 gv=24db, c, unless otherwise noted dd l , = 2 5 3. thd+n vs frequency , power analog microelectronics inc 1. thd+n vs output power 2. thd+n vs output power www.poweranalog.com 6. crosstalk vs frequency class d output 5. psrr vs frequency 4. thd+n vs frequency PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0 f=10khz f=1khz f=100hz r =8 l 0 . 06 50 0 . 1 0 . 2 0 . 5 1 2 5 10 20 % 10 m 5 20 m 50 m 100 m 20 0 m 50 0 m 1 2 w r =4 l f=10khz f=1khz f=100hz 0 . 03 10 0 . 05 0 . 1 0 . 2 0 . 5 1 2 5 % 20 20 k 50 100 200 500 1 k 2 k 5 k 10 k hz r =8 l po=0.3w po=0.5w po=1w 0 . 06 10 0 . 1 0 . 2 0 . 5 1 2 5 % 20 20 k 50 100 200 500 1 k 2 k 5 k 10 k hz r =4 l po=0.3w po=0.5w po=1w - 100 + 0 - 90 - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 d b 20 20 k 50 100 200 500 1 k 2 k 5 k 10 k hz l channel r channel - 110 + 0 - 100 - 90 - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 d b 20 20 k 50 100 20 0 500 1 k 2 k 5 k 10 k hz t t t t t t t t t t t t l to r r to l r =4 l r =4 l
6 typical operating characteristics (t =25c) a v =5v,r =8 gv=24db, c, unless otherwise noted dd l , = 2 5 8. noise floor , power analog microelectronics inc www.poweranalog.com 7.frequency response class d output 9.power dissipation vs output power 10.power dissipation vs output power 12. efficiency vs output power 11. efficiency vs output power PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0 + 10 + 30 + 12 + 14 + 16 + 18 + 20 + 22 + 24 + 26 + 28 d b r a 20 20 k 50 100 200 500 1 k 2 k 5 k 10 k hz cin=0.1uf cin=0.47uf cin=1uf - 110 - 50 - 105 - 100 - 95 - 90 - 85 - 80 - 75 - 70 - 65 - 60 - 55 d b r a 20 20 k 50 100 200 500 1 k 2 k 5 k 10 k hz v dd =2.5v/3.3v/3.6v/ 4.2v/5.0v/5.5v 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 o u t p u t p o w e r ( m w ) r =8 l 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 2 5 0 0 3 0 0 0 3 5 0 0 o u t p u t p o w e r ( m w ) r =4 l 0 5 0 1 0 0 1 5 0 2 0 0 2 5 0 3 0 0 3 5 0 4 0 0 4 5 0 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 2 5 0 0 3 0 0 0 3 5 0 0 o u t p u t p o w e r ( m w ) r =4 l 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 o u t p u t p o w e r ( m w ) r =8 l
7 typical operating characteristics (continued) , power analog microelectronics inc www.poweranalog.com 13. output power vs supply voltage 14. output power vs supply voltage 15. rdson vs output current 16. switching frequency vs supply voltage 17. quiescent current 18. gain step PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0 4 5 6 7 8 9 1 0 1 1 1 2 2 3 4 5 6 s u p p l y v o l t a g e ( v ) - 5 0 - 4 0 - 3 0 - 2 0 - 1 0 0 1 0 2 0 3 0 0 2 0 4 0 6 0 8 0 s t e p 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 2 5 0 0 2 3 4 5 6 s u p p l y v o l t a g e ( v ) r =8 l 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 2 5 0 0 3 0 0 0 3 5 0 0 4 0 0 0 4 5 0 0 2 3 4 5 6 s u p p l y v o l t a g e ( v ) 0 5 0 1 0 0 1 5 0 2 0 0 2 5 0 3 0 0 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 o u t p u t c u r r e n t ( m a ) p - m o s n - m o s 2 4 0 2 4 2 2 4 4 2 4 6 2 4 8 2 5 0 2 5 2 2 5 4 2 3 4 5 6 s u p p l y v o l t a g e ( v ) r =4 l
8 typical operating characteristics (continued) , power analog microelectronics inc www.poweranalog.com 19. output power vs pl-voltage 20. noise threshold vs r th PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0 0 5 0 0 1 0 0 0 1 5 0 0 2 0 0 0 2 5 0 0 3 0 0 0 3 5 0 0 0 0 . 2 0 . 4 0 . 6 0 . 8 1 1 . 2 p l - v o l t a g e ( v ) 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 1 0 0 1 5 0 2 0 0 2 5 0 3 0 0 r t h ( k )
- 13 0 + 0 - 12 0 - 110 - 10 0 - 90 - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 d b 20 20 k 50 10 0 200 500 1 k 2 k 5 k 10 k hz - 100 + 0 - 90 - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 d b 20 20 k 50 100 200 500 1 k 2 k 5 k 10 k hz t t 0 . 01 1 0 . 02 0 . 05 0 . 1 0 . 2 0 . 5 % 20 20 k 50 100 200 500 1 k 2 k 5 k 10 k hz 0 . 01 10 0 . 02 0 . 05 0 . 1 0 . 2 0 . 5 1 2 5 % 10 u 100 m 20 u 50 u 100 u 200 u 500 u 1 m 2 m 5 m 10 m 20 m w 0 . 01 20 0 . 02 0 . 05 0 . 1 0 . 2 0 . 5 1 2 5 10 % 10 u 200 m 20 u 50 u 100 u 200 u 500 u 1 m 2 m 5 m 10 m 20 m 50 m w 9 typical operating characteristics (continued) v =5v,gv=10db, c, unless otherwise noted dd = 2 5 , power analog microelectronics inc www.poweranalog.com earphone output PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0 3. thd+n vs frequency 1. thd+n vs output power 2. thd+n vs output power 6. crosstalk vs frequency 5. psrr vs frequency 4. thd+n vs frequency f=10khz f=1khz f=100hz r =16 l po=10mw po=50mw po=1mw l channel r channel l to r r to l r =32 l f=10khz f=1khz f=100hz r =16 l 0 . 01 1 0 . 02 0 . 05 0 . 1 0 . 2 0 . 5 % 20 20 k 50 100 200 500 1 k 2 k 5 k 10 k hz r =32 l po=10mw po=50mw po=1mw r =32 gv=10db l r =32 l
- 130 - 125 - 120 - 115 - 110 - 105 - 100 - 95 - 90 - 85 - 80 - 75 - 70 - 65 - 60 - 55 d b r a 20 20 k 50 100 200 500 1 k 2 k 5 k 10 k hz - 20 - 8 - 19 - 18 - 17 - 16 - 15 - 14 - 13 - 12 - 11 - 10 - 9 d b r a 20 20 k 50 100 200 500 1 k 2 k 5 k 10 k hz 1 0 typical operating characteristics (continued) , power analog microelectronics inc www.poweranalog.com PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0 8. noise floor 7.frequency response 9.gain step cin=0.1uf cin=0.47uf cin=1uf v dd =2.5v/3.3v/3.6v/ 4.2v/5.0v/5.5v - 8 0 - 7 0 - 6 0 - 5 0 - 4 0 - 3 0 - 2 0 - 1 0 0 1 0 0 2 0 4 0 6 0 8 0 s t e p
1 1 typical operating characteristics (continued) , power analog microelectronics inc www.poweranalog.com table 1. dc volume control s t e p g a i n ( d b ) c l a s s d g a i n ( d b ) e a r p h o n e s t e p g a i n ( d b ) c l a s s d g a i n ( d b ) e a r p h o n e 1 - 4 3 . 1 - 6 8 . 5 3 3 1 1 . 9 - 9 . 6 2 - 3 7 . 2 - 5 7 . 4 3 4 1 2 . 2 - 9 3 - 3 4 3 - 4 9 . 7 3 5 1 2 . 7 - 8 . 5 4 - 2 7 . 7 - 3 9 . 8 3 6 1 3 - 7 . 9 5 - 2 2 . 1 - 3 7 . 4 3 7 1 3 . 4 - 7 . 3 6 - 1 6 . 3 - 3 5 . 2 3 8 1 3 . 8 - 6 . 7 7 - 1 0 . 3 - 3 3 . 1 3 9 1 4 . 2 - 6 . 2 8 - 7 . 8 - 3 0 . 8 4 0 1 4 . 6 - 5 . 7 9 - 5 . 2 - 2 8 . 7 4 1 1 5 - 5 . 2 1 0 - 2 . 7 - 2 7 . 7 4 2 1 5 . 4 - 4 . 7 1 1 0 . 2 - 2 6 . 6 4 3 1 5 . 5 - 4 . 2 1 2 1 . 3 - 2 5 . 5 4 4 1 5 . 8 - 3 . 7 1 3 2 . 8 - 2 4 . 3 4 5 1 6 . 2 - 3 . 2 1 4 3 . 8 - 2 3 . 2 4 6 1 6 . 6 - 2 . 7 1 5 4 . 2 - 2 2 . 4 4 7 1 7 - 2 . 3 1 6 4 . 6 - 2 1 . 6 4 8 1 7 . 4 - 1 . 9 1 7 5 . 4 - 2 0 . 8 4 9 1 7 . 8 - 1 . 5 1 8 5 . 8 - 2 0 5 0 1 8 . 2 - 1 . 1 1 9 6 . 2 - 1 9 . 2 5 1 1 8 . 6 - 0 . 7 2 0 6 . 6 - 1 8 . 4 5 2 1 9 - 0 . 3 2 2 1 7 - 1 7 . 6 5 3 1 9 . 4 0 . 0 9 2 2 7 . 4 - 1 6 . 7 5 4 1 9 . 8 0 . 4 2 3 7 . 8 - 1 6 . 1 5 5 2 0 . 2 0 . 7 2 4 8 . 2 - 1 5 . 4 5 6 2 0 . 6 0 . 9 7 2 5 8 . 6 - 1 4 . 7 5 7 2 1 1 . 3 2 6 9 - 1 4 . 1 5 8 2 1 . 4 1 . 6 2 7 9 . 4 - 1 3 . 4 5 9 2 1 . 9 1 . 9 2 8 9 . 8 - 1 2 . 7 6 0 2 2 . 2 2 . 2 2 9 1 0 . 3 - 1 2 . 1 6 1 2 2 . 6 2 . 3 5 3 0 1 0 . 5 - 1 1 . 4 6 2 2 3 . 1 2 . 6 3 1 1 1 - 1 0 . 8 6 3 2 3 . 5 2 . 8 3 2 1 1 . 5 - 1 0 . 2 6 4 2 3 . 9 3 PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0
12 , power analog microelectronics inc www.poweranalog.com notes 1. the ap aux-0025 low pass filter is necessary for class-d amplifier measurement with ap analyzer . 2. two 22h inductors are used in series with load resistor to emulate the small speaker for effic iency measurement. test setup for performance testing(class d) ap system one generator PAM8010 demo board +out input load ap low pass filter aux - 0025 ap system two analyzer gnd - out vdd power supply application notice 1. when the PAM8010 works with lc filters, it should be connected with the speaker before it's powered on, otherwise it will be damaged easily. 2. when the PAM8010 works without lc filters, it's better to add a ferrite chip bead at the outgoing line of speaker for suppressing the possible electromagnetic interference. 3. the absolute maximum rating of the PAM8010 operation voltage is 6.0v. when the PAM8010 is powered with 4 battery cells, it should be noted that the voltage of 4 new dry or alkaline ba tteries is over 6v, higher than its maximum operation voltage, which probably m a k e t h e d e v i c e d a m a g e d . t h e r e f o r e , i t ' s recommended to use either 4 ni-mh (nickel metal hydride) rechargeable batteries or 3 dry or alkaline batteries. 4. the input signal should not be too high, if too high ,it will cause the clipping of output signal when increasing the volume. because the dc volume control of the PAM8010 has big gain, it will make the device damaged. 5. when testing the PAM8010 without lc filters b y using resistor instead of speaker as the output load, the test results, e.g. thd or efficiency, will be worse than those using speaker as load. PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0
13 , power analog microelectronics inc www.poweranalog.com application information (continued) PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0 c i i 1 f = 2 r c
14 , power analog microelectronics inc www.poweranalog.com application information (continued) over temperature protection h o w t o r e d u c e e m i ( e l e c t r o m a g n e t i c interference) pcb layout guidelines grounding thermal protection on the PAM8010 prevents the device from damage when the internal die temperature exceeds 150 . there is a 15 degree tolerance on this trip point from device to device. once the die temperature exceeds the thermal set point, the device outputs are disabled. this is not a latched fault. the thermal fault is cleared once the temperature of the die is reduced by 40 . this large hysteresis will prevent motor boating sound well. the device begins normal operation at this point without external system interaction. before thermal shutdown, the gain of the PAM8010 will drop -3db when the chip temperature reaches 12 a simple solution is to put an additional capacitor 1000uf at power supply terminal for power line coupling if the traces from amplifier to speakers are short (<20cm). most applications require a ferrite bead filter as shown at figure 1. the ferrite filter reduces emi around 1 mhz and higher. when selecting a ferrite bead, choose one with high impedance at high freque ncies, and low impedance at low frequencies (mh2012hm221-t). figure 1: ferrite bead filter to reduce emi at this stage it is paramount to notice the necessity of separate grounds. noise currents in the output power stage need to be returned to output noise ground and nowhere else. were these currents to circulate elsewhere, they may get into the power supply, the signal ground, etc, worse yet, they may form a loop and radiate noise. any of these cases results in degraded amplifier performance. th e logical returns for the output noise currents associated with class d switching are the respective pgnd pins for each channel. the switch state diagram illustrates that pgnd is instrumental in nearly every switch state. this is the perfect point to which the output noise ground trace should return. also note that output noise ground is channel specific. a two channel amplifier has two seperate channels and consequently must have two seperate output noise ground traces. the layout of the pam801 0 offers separate pgnd connections for each channel and in some cases each side of the bridge. output noise grounds must be tied to system ground at the power in exclusively. signal currents for the inputs, reference, etc need to be returned to quite ground. this ground is only tied to the signal components and the gnd pin, and gnd then tied to system ground. 0 . 2 0 0 p f 2 0 0 p f o u t + o u t - f e r r i t e b e a d f e r r i t e b e a d PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0
ordering information 15 packagetype PAM8010 x x x shipping , power analog microelectronics inc p a r t n u m b e r p a c k a g e t y p e s t a n d a r d p a c k a g e p a m 8 0 1 0 n h r s s o p - 2 4 2 , 5 0 0 u n i t s / t a p e & r e e l p a m 8 0 1 0 d h r s o p - 2 4 1 , 0 0 0 u n i t s / t a p e & r e e l www.poweranalog.com number of pins PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0
outline dimension 16 ssop-24 , power analog microelectronics inc www.poweranalog.com PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0
outline dimension sop-24 17 , power analog microelectronics inc www.poweranalog.com PAM8010 3w stereo class-d with dc volume, headphone and power limit 05/2011 rev1.0

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