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key features applications 1.0 w/2.0w@<1% thd output with a 8 4 load at 5v supply maximum output power can be set by one external resistor minimized on/off pop noise superior low noise high psrr supply voltage from 2.5v to 5.5 v auto recovering short circuit protection over temperature protection 9 ball, 1.3mm x 1.3mm, 0.4mm pitch wcsp and emsop10 packages wireless or cellular handsets and pdas portable navigation devices general portable audio devices the PAM8012 features anti-saturation function which detect output signal clip due to the over input level and keep the output non-saturation automatically to get the excellent sound quality. the maximum output power without clip can be set by one resistor at pl pin that to prevent the speaker to be damaged.. / n n n general description the PAM8012 is a 2.0w mono filterless class-d amplifier with high psrr and differential input that reduce noise. features like 90% efficiency and small pcb area make the PAM8012 class-d amplifier ideal for cellular handsets. the filterless architecture requires no external output filter, fewer external components, less pcb area and lower system costs, and simplifies application design. the PAM8012 features short circuit protection and over temperature protection. the PAM8012 is available in tin y wcsp9 (1.3mm x 1.3mm) and emsop10 packages. n n n n n n n n n typical application circuit PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 1 , power analog microelectronics inc www.poweranalog.com 06/2012 rev1.3 out- out+ vdd 0.1 f input gnd in+ PAM8012 in- en off 1 f pl vdd r pl on 0.1 f 1 f vref 10 f 1 f
block diagram 2 , power analog microelectronics inc www.poweranalog.com pin configuration & marking information bi: product code of PAM8012 y: year w: week 9 ball 0.4mm pitch wcsp top view of pcb out+ vdd gnd out- en pl a1 a2 a3 b1 b2 b3 vref in+ in- c1 c2 c3 PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 9 ball 0.4mm pitch wcsp top view of marking bi yw 06/2012 rev1.3 + - pwm modulator uvlo startup protection osc power limit gate drive gate drive scp otp vref in+ in- out+ out- vdd anti-sat bias en pl gnd rin rin rf rf vref
3 , power analog microelectronics inc www.poweranalog.com 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 . . . supply voltage, vdd...................................6.0v input voltage,in+,in-...............-0.3v to vdd+0.3v storage temperature.....................-65c to 150 soldering temperature.................... minimum load resistance, r ......................3.2 c 260c,10 sec l maximum junction temperature..................150c recommended operating conditions supply voltage range........................ ambient temperature range............-40 to 85 junction temperature range......... 2.5v to 5.5v c c -40c to 125c thermal information 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 w c s p 9 1 . 3 x 1 . 3 1 0 0 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 e m s o p 1 0 6 0 c / w w c s p 9 1 . 3 x 1 . 3 4 0 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 c a s e ) j c e m s o p 1 0 3 0 c / w PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 06/2012 rev1.3 top view emsop10 x: internal code y: year w: week 1 2 3 4 7 8 9 10 pgnd out- pl in- in+ out+ vdd en vref agnd 5 6
4 electrical characteristic t =25 c, a vdd=5.0v, r =8 , unless otherwise noted l . , power analog microelectronics inc www.poweranalog.com s y m b o l p a r a m e t e r m i m t y p m a x u n i t v d d s u p p l y v o l t a g e 2 . 5 5 . 5 v r p l = 1 1 0 k , f = 1 k h z , r = 4 v d d = 5 . 0 v 2 . 0 w r p l = 1 1 0 k , f = 1 k h z , r = 8 v d d = 5 . 0 v 1 . 0 v d d = 5 . 0 v , p o = 2 . 0 w , r = 4 0 . 0 8 v d d = 3 . 6 v , p o = 1 . 0 w , r = 4 0 . 0 8 v d d = 5 . 0 v , p o = 1 . 0 w , r = 8 0 . 0 8 v d d = 3 . 6 v , p o = 0 . 5 w , r = 8 0 . 0 8 v d d = 5 . 0 v - 7 5 v d d = 3 . 6 v - 7 5 v d d = 5 . 0 v 9 5 v d d = 3 . 6 v 9 5 n o a - w e i g h t i n g 6 0 a - w e i g h t i n g 4 0 r l = 8 9 0 r l = 4 8 7 i q q u i e s c e n t c u r r e n t v e n = 5 . 0 v , v d d = 5 . 0 v , p l = 0 v n o l o a d 4 . 2 m a i s d s h u t d o w n c u r r e n t v d d = 2 . 5 v t o 5 . 5 v , v e n = 0 v n o l o a d 1 u a | v o s | o f f s e t v o l t a g e - 2 0 2 0 m v r i n i n p u t r e s i s t o r 3 1 k g v c l o s e d l o o p g a i n 1 8 d b f s w s w i t c h i n g f r e q u e n c y 2 5 0 k h z t o n t u r n - o n t i m e 4 5 m s o t p 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 v d d = 5 v n o l o a d 1 5 0 o t h o v e r t e m p e r a t u r e h y s t e r i s i s v d d = 5 v n o l o a d 4 0 v e n h h i g h - l e v e l e n v o l t a g e 1 . 4 v v e n l l o w - l e v e l e n v o l t a g e 0 . 4 v a r m a x i m u m a t t e n u a t i o n r a n g e 2 6 d b p o t h d + n o u t p u t p o w e r p e a k e f f i c i e n c y s n r p s r r a c 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 v n 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 e s t c o n d i t i o n s f = 1 k h z f = 1 k h z f = 2 1 7 h z , i n p u t s a c - g r o u n d e d w i t h c i n = 0 . 1 f % f = 1 k h z % a n t i - s a t u r a t i o n a c t i v e , f r o m + 1 8 d b t o - 8 d b v d d = 5 v v d d = 5 v v d d = 5 v v d d = 5 v v d d = 5 v v d d = 5 v v d d = 5 v o u t p u t n o i s e v c i n = 0 . 1 u f , i n p u t s a c - g r o u n d e d t h d = 1 % , f = 1 k h z s i g n a l t o n o i s e r a t i o d b PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 06/2012 rev1.3
0 . 0 5 2 0 0 . 1 0 . 2 0 . 5 1 2 5 1 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 . 0 4 2 0 0 . 1 0 . 2 0 . 5 1 2 5 1 0 % 1 m 2 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 w + 4 + 2 0 + 5 + 6 + 7 + 8 + 9 + 1 0 + 11 + 1 2 + 1 3 + 1 4 + 1 5 + 1 6 + 1 7 + 1 8 + 1 9 d b r a 2 0 5 0 k 50 100 200 500 1 k 2 k 5 k 10 k 2 0 k hz PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 5 , power analog microelectronics inc www.poweranalog.com 06/2012 rev1.3 typical operating characteristics t =25 c, v =5v, unless otherwise noted a dd . 4. thd+n vs frequency 3. thd+n vs frequency 2. thd+n vs output power 1. thd+n vs output power 5. frequency response 6. frequency vs supply voltage r =8 l vin=4.2v vin=3.6v vin=5v r =4 l 0 . 007 10 0 . 01 0 . 02 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 . 01 10 0 . 02 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 =4 l po=0.3w po=0.5w po=1w cin=0.1uf cin=0.47uf cin=1uf 2 3 5 2 3 7 2 3 9 2 4 1 2 4 3 2 4 5 2 4 7 2 4 9 2 5 1 2 5 3 2 5 5 2 . 0 3 . 0 4 . 0 5 . 0 6 . 0 s u p p l y v o l t a g e ( v ) vin=4.2v vin=3.6v vin=5v
PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 6 , power analog microelectronics inc www.poweranalog.com 06/2012 rev1.3 typical operating characteristics t =25 c, v =5v, unless otherwise noted a dd . 10. psrr vs frequency 9. psrr vs frequency 8. efficiency vs output power 7. efficiency vs output power 11. rdson vs load current 12. r vs output power pl 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 0 0 . 5 1 1 . 5 2 o u t p u t p o w e r ( 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 0 . 5 1 1 . 5 2 2 . 5 3 3 . 5 o u t p u t p o w e r ( w ) r =4 l 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 l o a d c u r r e n t ( m a ) p m o s ( m ) n m o s ( m ) - 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 t t r =4 l - 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 t t t t t t t t t t t t t t t t t t r =8 l 0 0 . 2 0 . 4 0 . 6 0 . 8 1 1 . 2 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 r p l ( k ) vin=4.2v r =8 l
PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 7 , power analog microelectronics inc www.poweranalog.com 06/2012 rev1.3 notes 1. the ap aux-0025 low pass filter is necessary for class-d amplifier measurement with ap analyzer . 2. two 33h inductors are used in series with load resistor to emulate the small speaker for effic iency measurement. test setup for performance testing ap system one generator PAM8012 demo board +out input load ap low pass filter aux - 0025 ap system two analyzer gnd - out vdd power supply anti-saturation the anti-saturation feature provides continuous automatic gain adjustment to the amplifiier through an internal circuit. this feature enhances the perceived audio loudness and at the same time prevents speaker damage from occurring. table 1. PAM8012 anti-saturation variable description v a r i a b l e d e s c r i p t i o n v a l u e g a i n t h e p r e - s e t g a i n o f t h e d e v i c e w h e n t h e a n t i - s a t u r a t i o n i s i n a c t i v e . t h e f i x e d g a i n i s a l s o t h e i n i t i a l g a i n w h e n t h e d e v i c e c o m e s o u t o f s h u t d o w n m o d e o r w h e n t h e a n t i - s a t u r a t i o n i s d i s a b l e d 1 8 d b ( m a x i m u m ) a t t a c k t i m e t h e m i n i m u m t i m e b e t w e e n t w o g a i n d e c r e m e n t s . 1 2 8 u s r e l e a s e t i m e t h e m i n i m u m t i m e b e t w e e n t w o g a i n i n c r e m e n t s . 2 5 6 m s the anti-saturation works by detecting the output. the gain changes depending on the supply voltage , and the attack and release time. the gain changes constantly as the audio signal increases and/or decreases. the gain step size for the is 0.4 db. if the audio signal has near-constant amplitude, the gain does not change. table 1 shows the anti-saturation variable description. anti-saturation pl terminal function able 2 the voltage value of pl sets the PAM8012 maximum output by an external resistor. refer to t for anti-saturation and power limit selection. table 2. PAM8012 anti-saturation and power limit variable description application information 0 3 0 k < r p l < 1 2 0 k o p e n v d d p l : o f f a n t i - s a t : o f f p l : o n a n t i - s a t : o n p l : o f f a n t i - s a t : o n v d d / 2 p l : o f f a n t i - s a t : o f f p l : o n a n t i - s a t : o f f p l : o n a n t i - s a t : o f f e n r p l
PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 8 , power analog microelectronics inc www.poweranalog.com 06/2012 rev1.3 input capacitors (ci ) decoupling capacitor (c ) how to reduce emi in the typical application, an input capacitor, ci, is required to allow the amplifier to bias the input signal to the proper dc level for optimum operation. in this case, ci and the minimum input impedance ri form is a high-pass filter with the corner frequency determined in the follow equation: it is important to consider the value of ci as it directly affects the low frequency performance of the circuit. for example,the specification calls for a flat bass response are down to 150hz. equation i s reconfigured as followed: when input resistance variation is considered, the ci is 34nf, so one would likely choose a value of 33nf. a further consideration for this capacitor is the leakage path from the input source through the input network ( , ) to the load. this leakage current creates a dc offset voltage at the input to the amplifier that reduces useful headroom, especially in high gain applications. for this reason, a low-leakage tantalum or ceramic capacitor is the best choice. when pola rized capacitors are used, the positive side of the capacitor should face the amplifier input in most applications as the dc level is held at v /2, which is likely higher than the source dc level. please note that it is important to confirm the capacitor polarity in the application. the PAM8012 is a high-performance cmos audio amplifier that requires adequate power supply decoupling to ensure the output total harmonic distortion (thd) as low as possible. power supply decoupling also prevents the o scillations causing by long lead length between the amplifier and the speaker. the optimum decoupling is achieved by using two different types of capacitors that target on different types of noise on the power supply leads. for higher frequency transients, spikes, or digital hash on the line, a good low equivalent- series-resistance (esr) ceramic capacitor, typically 1 f, is placed as close as possible to vdd pin for the best operation. for filtering lower fr e q ue nc y n oi s e s i gn a ls , a l ar g e c e r am i c c apacitor of 10 f or greater placed near the audio power amplifier is recommended. most applications require a ferrite bead filter for emi elimination shown at figure 1. the ferrite filter reduces emi around 1mhz and higher. when selecting a ferrite bead, choose one with high impedance at high frequencies, but low impedance at low frequencies. figure 1: ferrite bead filter to reduce emi dd s ci ri + rf amplifier off when logic low is placed on the en pin. by switching the en pin connected to gnd, the PAM8012 supply current draw will be minimized in idle mode. the PAM8012 has short circuit protection circuitry on the outputs to prevent the device from damage when output-to-output shorts or output-to-gnd shorts occur. when a short circuit o cc urs , the dev ice i mmed iatel y goe s into shutdown state. once the short is removed, the device will be reactivated. short circuit protection (scp) shutdown operation in order to reduce power consumption while not in use, the PAM8012 contains shutdown circuitry that is used to turn off the amplifier?s bias c ircuitr y. this shutdown featur e tur ns the application information 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 r i c i f c p 2 1 = r i f c c i p 2 1 =
PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 9 , power analog microelectronics inc www.poweranalog.com 06/2012 rev1.3 over temperature protection (otp) pop and click circuitry pcb layout guidelines grounding power supply line components placement thermal protection on the PAM8012 prevents the device from damage when the internal die temperature exceeds 150c. there is a 15 tolerance on this trip point from device to device. once the die temperature exceeds the set point, the device will enter the shutdown state and the outputs are disabled. this is not a latched fault. t h e t h e r m a l f a u l t i s c l e a r e d o n c e t h e temperature of the die decreased by 40 . this large hysteresis will prevent motor boating sound well and the device begins normal oper ation at this point with no external system interaction. the PAM8012 contains circuitry to minimize turn- on and turn-off transients or ?click and pops?, where turn-on refers to either power supply turn- on or device recover from shutdown mode. when the device is turned on, the amplifiers are internally muted. an internal current source ramps up the reference voltage. the device will remain in mute mode until the reference voltage reach half supply voltage, 1/2 vdd. as soon as the reference voltag e is stable, the device will begin full operation. for the best power-off pop performance, the amplifier should be set in shutdown mode prior to removing the power supply voltage. it is recommended to use plane grounding. noise currents in the output power stage need to be returned to output noise ground and nowhere else. when these currents circulate elsewhere, they may get into the power supply, or the signal ground, etc, even worse, they may form a loop and radiate noise. any of these instance s results in degraded amplifier performance. the output noise ground that the logical returns for the output noise currents with class d switching must tie to system ground at the power exclusively. signal currents for the inputs, reference need to be returned to quite ground. this ground only ties to the signal components and the gnd pin. gnd then ties to system ground. it is recommended that all the trace could be routed as short and thick as possible. for the power line layout, just imagine water stream, any barricade placed in the trace (shown in figure 2) could result in the bad performance of the amplifier. figure 2: power line decoupling capacitors as previously described, the high-frequency 1 f decoupling capacitors should be placed as close to the power supply terminals as possible. large bulk power supply decoupling capacitors should be placed near the PAM8012 on the vdd terminal. input resistors and capacitors need to be placed very close to input pins. c c internal associated vdd (10 f or greater) output filter - the ferrite emi filter should be placed as close to the output terminals as possible for the best emi performance, and the capacitors used in the filters should be grounded to system ground.
10 , power analog microelectronics inc www.poweranalog.com ordering information pin configuration PAM8012 x x x number of pins package type p i n c o n f i g u r a t i o n p a c k a g e t y p e n u m b e r o f p i n s a : b : a 1 : o u t + 1 . p g n d a 2 : o u t - 2 . o u t - a 3 : g n d 3 . p l b 1 : v d d 4 . i n - b 2 : e n 5 . i n + b 3 : p l 6 . a g n d c 1 : v r e f 7 . v r e f c 2 : i n + 8 . e n c 3 : i n - 9 . v d d 1 0 . o u t + z : w c s p 9 s : e m s o p 1 0 n : 9 m : 1 0 p a r t n u m b e r m a r k i n g p a c k a g e t y p e m o q p a m 8 0 1 2 a z n b i y w w c s p 9 ( 1 . 3 m m x 1 . 3 m m ) 3 , 0 0 0 u n i t s / t a p e & r e e l p a m 8 0 1 2 b s m p 8 0 1 2 x x x y w e m s o p 1 0 2 , 5 0 0 u n i t s / t a p e & r e e l PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 06/2012 rev1.3
11 , power analog microelectronics inc www.poweranalog.com outline dimensions wcsp9 side iew v 0 42 . 0 34 . 0 30 . 0 24 . seating plane 0 72max . 0 300 . 9 x a b c 1 2 3 bottom view 0 80 . 0 40 . 0.80 0 40 . 0 200 . top view pin a1 corner 1 24 . 1 32 . 1 24 . 1 32 . wcsp9 9 ball wafer level chip scale package - unit millimeter : PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 06/2012 rev1.3
12 , power analog microelectronics inc www.poweranalog.com outline dimensions emsop10 PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 06/2012 rev1.3
PAM8012 mono 2.0w anti-saturation class d audio power amplifier with power limit 13 , power analog microelectronics inc www.poweranalog.com 06/2012 rev1.3 datasheet revision history d a t e r e v i s i o n d e s c r i p t i o n c o m m e n t 0 3 / 1 0 / 2 0 1 1 a d v a n c e d i n i t i a l l y v e r s i o n . 0 8 / 3 0 / 2 0 1 1 p r e l i m i n a r y a d d s i l i c o n t e s t d a t a . 0 9 / 1 9 / 2 0 1 1 r e v 1 . 0 i n i t i a l l y r e l e a s e d . 0 2 / 0 6 / 2 0 1 2 r e v 1 . 1 a d d e m s o p 1 0 p a c k a g e a n d u p d a t e t h e " r p l v s p o " c u r v e . 0 5 / 2 3 / 2 0 1 2 r e v 1 . 2 u p d a t e t h e " p i n c o n f i g u r a t i o n " o f e m s o p 1 0 p a c k a g e a n d t h e r m a l i n f o ; a d d " d a t a s h e e t r e v i s i o n h i s t o r y " f o r m . 0 6 / 0 6 / 2 0 1 2 r e v 1 . 3 u p d a t e " t a b l e 2 " i n " a p p l i c a t i o n i n f o r m a t i o n "

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