View PAM8007_6936874.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

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 64-step dc volume control headphone output function superior low noise low pop noise efficiency up to 92% short circuit protection thermal shutdown few external components to save the space and cost lcd monitors / tv projectors notebook computers portable speakers portable dvd players, game machines voip/speaker phones directly it can extend the battery life thus be ideal for portable ap plications. n n n n n general description the PAM8007 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. it offers low thd+n, to produce high-quality sound reproduction. the new filterless architecture allows the device to drive the speaker , without low-pass output filters which will save 30% system cost and 75% pcb area. with the same numbers of external components, the efficiency of the PAM8007 is muc h better than class-ab cousins. the PAM8007 is available in a ssop-24 and sop- 24 package. , n n n n n n n n n n n n pb-free package PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output 1 www.poweranalog.com typical application , power analog microelectronics inc mute 6 5 earinl 15 earinr line/ear h: headphone l: class d ( de fault) earoutl earoutr - -outr + outr 21 24 vdc - -outl + outl vdd 1 4 vref 11 dc volume 14 10 7 17 16 pvddl pgndl pgndl 3 headphone 13 12 2 pvddr 0.47 f inl 8 pgndr pgndr inr gnd 9 inl PAM8007 inr 20 18 shdn mute vdd v olume 23 19 shdn on 22 on pvdd l 0.47 f 0.47 f 0.47 f 1 f 1 f 1 f 10 f 1 f 10 f + - + - 220 f 220 f 01/2012 rev1.2
block diagram 2 pin configuration & marking information ssop24 top view +out_l pgndl pgndl -out_l pvddl mute vdd inl earinl vdc vref earoutl earoutr volume line/ear earinr inr gnd shdn pvddr -out_r pgndr 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 x: internal code y: year ww: week ll: internal code , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output www.poweranalog.com vdd/2 vdd/2 vdd inr line/ear mute shdn inl gnd pvdd pgnd -out_l +out_l vref -out_r +out_r pgnd pvdd modulator driver internal oscillator osc bias and references modulator driver thermal protection current protection + - - headphone earoutr headphone earoutl volume earinr earinl vdc sop24 top view +out_l pgndl pgndl -out_l pvddl mute vdd inl earinl vdc vref earoutl earoutr volume line/ear earinr inr gnd shdn pvddr -out_r pgndr 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 - + + + - 01/2012 rev1.2
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 PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output 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 p g n d l l e f t c h a n n e l p o w e r g n d 4 + 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 5 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 6 m u t e m u t e c o n t r o l i n p u t ( a c t i v e l o w ) 7 v d d a n a l o g v d d 8 i n l l e f t c h a n n e l i n p u t 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 v d c a n a l o g r e f e r e n c e f o r g a i n c o n t r o l s e c t i o n 1 1 v o l u m e d c v o l u m e c o n t r o l t o s e t t h e g a i n o f c l a s s - d 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 r e f 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 r e f t o g n d 1 5 l i n e / e a r l i n e / e a r p h o n e s w i t c h . s p e a k e r o u t p u t ( a c t i v e l o w ) , e a r p h o n e o u t p u t ( a c t i v e h i g h ) 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 i n r r i g h t c h a n n e l i n p u t 1 8 g n d a n a l o g g n d 1 9 s h d n 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 ) 2 0 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 1 + 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 2 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 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 storage temperature................. ....-65c to 150 soldering temperature....................... input voltage.............................-0.3v to v +0.3v ................150c c 300c,5sec dd maximun junction temperature... 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 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 c s s o p - 2 4 3 2 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 c s o p - 2 4 2 7 c / w thermal information 01/2012 rev1.2
4 electrical characteristic v =5v, gain = 24db, r =8 t =25c, unless otherwise noted. dd l a , , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output 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 2 1 6 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 1 0 5 0 m v p m o s f e t 0 . 2 3 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 5 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 . 1 w r l = 8 , p o = 1 w , f = 1 k h z 0 . 1 2 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 = 2 w , f = 1 k h z 0 . 1 5 % 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 6 3 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 r m s , f = 1 k h z - 8 8 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 5 w , f = 1 k h z , r l = 8 8 5 9 2 % 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 8 % a - w e i g h t i n g 6 5 n o i s e v n i n p u t a c - g n d g a i n = 1 2 d b n o a - w e i g h t i n g 9 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 % 8 4 d b e a r p h o n e s t a g e 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 9 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 4 % 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 3 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 r m s , f = 1 k h z 9 5 d b a - w e i g h t i n g 1 9 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 2 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 7 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 v m u t e = 0 v 8 1 2 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 2 0 a s h d n i n p u t h i g h v s h 1 . 5 s h d n i n p u t l o w v s l 0 . 4 v m u t e i n p u t h i g h v m h 1 . 5 m u t e i n p u t l o w v m l 0 . 4 v l i n e / e a r i n p u t h i g h v d h 2 . 5 l i n e / e a r i n p u t l o w v d l 0 . 4 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 3 0 c 01/2012 rev1.2
0 . 0 1 1 0 0 . 0 2 0 . 0 5 0 . 1 0 . 2 0 . 5 1 2 5 % 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z 0 . 1 3 0 0 . 2 0 . 5 1 2 5 1 0 2 0 % 1 m 4 2 m 5 m 1 0 m 2 0 m 5 0 m 1 0 0 m 2 0 0 m 5 0 0 m 1 2 w 0 . 1 3 0 0 . 2 0 . 5 1 2 5 1 0 2 0 % 1 m 4 2 m 5 m 1 0 m 2 0 m 5 0 m 1 0 0 m 2 0 0 m 5 0 0 m 1 2 w 5 typical operating characteristics (t =25c) a , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output www.poweranalog.com 3. thd+n vs frequency 1. thd+n vs output power 2. thd+n vs output power 6. crosstalk vs frequency speaker 5. psrr vs frequency 4. thd+n vs frequency rl=4 vdd=5v vdd=5v rl=4 po=0.3w/1w/2w rl=8 vdd=5v 0 . 0 1 1 0 0 . 0 2 0 . 0 5 0 . 1 0 . 2 0 . 5 1 2 5 % 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z vdd=5v rl=8 po=0.3w/1w/1.3w - 7 0 + 0 - 6 5 - 6 0 - 5 5 - 5 0 - 4 5 - 4 0 - 3 5 - 3 0 - 2 5 - 2 0 - 1 5 - 1 0 - 5 d b 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z - 1 0 0 + 0 - 9 0 - 8 0 - 7 0 - 6 0 - 5 0 - 4 0 - 3 0 - 2 0 - 1 0 d b 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t po=0.3w po=1w po=2w po=0.3w po=1w po=1.3w l to r r to l 01/2012 rev1.2
6 typical operating characteristics (t =25c) a , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output www.poweranalog.com 9. power dissipation vs output power 7. frequency response 8. noise floor 12. efficiency vs output power speaker 11. efficiency vs output power 10. power dissipation vs output power + 1 0 + 3 0 + 1 2 + 1 4 + 1 6 + 1 8 + 2 0 + 2 2 + 2 4 + 2 6 + 2 8 d b g a 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z cin=2.2uf cin=1uf cin=0.47uf cin=0.1uf - 1 2 0 - 5 0 - 1 1 5 - 1 1 0 - 1 0 5 - 1 0 0 - 9 5 - 9 0 - 8 5 - 8 0 - 7 5 - 7 0 - 6 5 - 6 0 - 5 5 d b g a 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z 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 ) rl=4 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 ) rl=8 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 ) rl=4 vdd=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 ) rl=8 vdd=5v 01/2012 rev1.2
7 typical operating characteristics (t =25c) a , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output www.poweranalog.com 15. rdson vs output current 13. output power vs supply voltage 14. output power vs supply voltage 18. gain step speaker 17. switching frequency vs supply voltage 16. quiescent current 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 2 3 4 5 6 s u p p l y v o l t a g e ( v ) rl=4 vdd=5v 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 ) rl=8 vdd=5v 1 5 0 1 7 0 1 9 0 2 1 0 2 3 0 2 5 0 2 7 0 2 9 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 ) r - p m o s r - n m o s 0 2 4 6 8 1 0 1 2 1 4 1 6 2 3 4 5 6 s u p p l y v o l t a g e ( v ) 2 3 8 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 5 6 2 2 . 5 3 3 . 5 4 4 . 5 5 5 . 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 01/2012 rev1.2
8 typical operating characteristics (continued) , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output www.poweranalog.com 3. thd+n vs frequency 1. thd+n vs output power 2. thd+n vs output power 6. crosstalk vs frequency earphone output 5. psrr vs frequency 4. thd+n vs frequency 0 . 0 1 3 0 0 . 0 2 0 . 0 5 0 . 1 0 . 2 0 . 5 1 2 5 1 0 2 0 % 1 u 1 0 0 m 2 u 5 u 1 0 u 2 0 u 5 0 u 1 0 0 u 2 0 0 u 5 0 0 u 1 m 2 m 5 m 1 0 m 2 0 m 5 0 m w rl=16 vdd=5v f=100hz f=1khz f=10khz 0 . 0 1 3 0 0 . 0 2 0 . 0 5 0 . 1 0 . 2 0 . 5 1 2 5 1 0 2 0 % 1 u 1 0 0 m 2 u 5 u 1 0 u 2 0 u 5 0 u 1 0 0 u 2 0 0 u 5 0 0 u 1 m 2 m 5 m 1 0 m 2 0 m 5 0 m w rl=32 vdd=5v 0 . 0 1 1 0 0 . 0 2 0 . 0 5 0 . 1 0 . 2 0 . 5 1 2 5 % 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z vdd=5v rl=16 po=1mw/10mw/60mw 0 . 0 1 1 0 0 . 0 2 0 . 0 5 0 . 1 0 . 2 0 . 5 1 2 5 % 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z vdd=5v rl=32 po=1mw/10mw/50mw - 9 0 + 0 - 8 5 - 8 0 - 7 5 - 7 0 - 6 5 - 6 0 - 5 5 - 5 0 - 4 5 - 4 0 - 3 5 - 3 0 - 2 5 - 2 0 - 1 5 - 1 0 - 5 d b 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z t t f=100hz f=1khz f=10khz po=1mw po=10mw po=10mw po=50mw po=10mw po=1mw - 110 + 0 - 100 - 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 t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t l to r r to l 01/2012 rev1.2
9 typical operating characteristics (t =25c) a , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output www.poweranalog.com 7. frequency response 8. noise floor 9. gain step - 1 2 0 - 5 0 - 1 1 5 - 1 1 0 - 1 0 5 - 1 0 0 - 9 5 - 9 0 - 8 5 - 8 0 - 7 5 - 7 0 - 6 5 - 6 0 - 5 5 d b g a 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z - 1 0 + 5 - 9 - 8 - 7 - 6 - 5 - 4 - 3 - 2 - 1 - 0 + 1 + 2 + 3 + 4 d b g a 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z - 8 0 - 7 0 - 6 0 - 5 0 - 4 0 - 3 0 - 2 0 - 1 0 0 1 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 s t e p cin=2.2uf cin=1uf cin=0.47uf cin=0.1uf 01/2012 rev1.2
1 0 typical operating characteristics (continued) , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output 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 - 8 0 - 8 0 3 3 1 1 . 6 - 9 . 2 2 - 4 0 - 6 0 3 4 1 2 - 8 . 6 3 - 3 4 - 5 0 3 5 1 2 . 4 - 8 4 - 2 8 - 4 0 3 6 1 2 . 8 - 7 . 4 5 - 2 2 - 3 7 . 7 3 7 1 3 . 2 - 6 . 8 6 - 1 6 - 3 5 . 4 3 8 1 3 . 6 - 6 . 2 7 - 1 0 - 3 3 . 1 3 9 1 4 - 5 . 7 8 - 7 . 5 - 3 0 . 8 4 0 1 4 . 4 - 5 . 2 9 - 5 - 2 8 . 5 4 1 1 4 . 8 - 4 . 7 1 0 - 2 . 5 - 2 7 . 5 4 2 1 5 . 2 - 4 . 2 1 1 0 - 2 6 . 4 4 3 1 5 . 6 - 3 . 7 1 2 1 . 5 - 2 5 . 3 4 4 1 6 - 3 . 2 1 3 3 - 2 4 . 2 4 5 1 6 . 4 - 2 . 7 1 4 4 - 2 3 . 1 4 6 1 6 . 8 - 2 . 2 1 5 4 . 4 - 2 2 . 2 4 7 1 7 . 2 - 1 . 8 1 6 4 . 8 - 2 1 . 4 4 8 1 7 . 6 - 1 . 4 1 7 5 . 2 - 2 0 . 6 4 9 1 8 - 1 1 8 5 . 6 - 1 9 . 8 5 0 1 8 . 4 - 0 . 6 1 9 6 - 1 9 5 1 1 8 . 8 - 0 . 2 2 0 6 . 4 - 1 8 . 2 5 2 1 9 . 2 0 . 2 2 1 6 . 8 - 1 7 . 4 5 3 1 9 . 6 0 . 6 2 2 7 . 2 - 1 6 . 6 5 4 2 0 0 . 9 2 3 7 . 6 - 1 5 . 9 5 5 2 0 . 4 1 . 2 2 4 8 - 1 5 . 2 5 6 2 0 . 8 1 . 5 2 5 8 . 4 - 1 4 . 5 5 7 2 1 . 2 1 . 8 2 6 8 . 8 - 1 3 . 8 5 8 2 1 . 6 2 . 1 2 7 9 . 2 - 1 3 . 1 5 9 2 2 2 . 4 2 8 9 . 6 - 1 2 . 4 6 0 2 2 . 4 2 . 7 2 9 1 0 - 1 1 . 7 6 1 2 2 . 8 2 . 9 3 0 1 0 . 4 - 1 1 6 2 2 3 . 2 3 . 1 3 1 1 0 . 8 - 1 0 . 4 6 3 2 3 . 6 3 . 3 3 2 1 1 . 2 - 9 . 8 6 4 2 4 3 . 5 01/2012 rev1.2
11 , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output www.poweranalog.com notes 1. the audio precision(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) audio precision (ap) system generator PAM8007 demo board +out input load ap low pass filter aux - 0025 ap system analyzer gnd - out vdd power supply application notice 1. when the PAM8007 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 PAM8007 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 PAM8007 operation voltage is 6.0v. when the PAM8007 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 PAM8007 has big gain, it will make the device damaged. 5. when testing the PAM8007 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. 01/2012 rev1.2
12 , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output www.poweranalog.com application information (continued) c i i 1 f = 2 r c 01/2012 rev1.2
13 , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output 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 PAM8007 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 30 . this large hysteresis will prevent motor boating sound well. the device begins normal operation at this point without external system interaction. 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 frequencies, and low impedance at low frequencies (mh2012hm221-t). figure 1: ferrite bead filter to reduce e mi 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. the 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 PAM8007 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. pcb layout example figure 2: top layer figure 3: bottom layer 2 2 0 p f 2 2 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 01/2012 rev1.2
ordering information 14 packagetype PAM8007 x x x shipping package , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output 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 0 7 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 0 7 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 01/2012 rev1.2
outline dimension 15 ssop-24 , power analog microelectronics inc PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output www.poweranalog.com 01/2012 rev1.2
outline dimension sop-24 PAM8007 filterless 3w class-d stereo audio amplifier with dc volume control and headphone output 16 , power analog microelectronics inc www.poweranalog.com 01/2012 rev1.2

▲Up To Search▲

Price & Availability of PAM8007

	To Download PAM8007 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .