PAM8014 document number: ds 38114 rev. 1 - 2 1 of 9 www.diodes.com january 2016 ? diodes incorporated new product 3.2w mono class d audio amplifier description the PAM8014 is a 3 .2 w mono filter - less class - d amplifier with high psrr and differential input that eliminate noise and rf rectification. features like greater than 90% efficiency and small pcb area make the PAM8014 class - d amplifier ideal for portable applications. the output uses a filter - less architecture mi nimizing the number of external components and pcb area whilst providing a high pe rformance, simple and lower cost system. the PAM8014 features short circuit protection and thermal shutdown. the PAM8014 is available in u - wlb1313 - 9 package. features ? ultra low emi, - 20db better than fcc class - b @ 300mhz ? high efficiency up to 9 3 % @ 2 w with a 8 speaker ? shutdown current <1a ? 3 .2 w@10% thd output with a 4 load at 5v supply ? demanding few external components ? superior low noise without input ? supply voltage from 2. 5 v to 5.5 v ? short circuit protection ? thermal shutdown ? available in space savin g u - wlb1313 - 9 package ? totally lead - free&fully rohs compliant (notes 1& 2) ? h alogen and antimony free. green device (note 3) pin assignments ( top view ) u - wlb1313 - 9 applications ? cellular phones/smart phones ? mp4/mp3 ? voip ? digital photo frame ? electronic dictionary ? portable game machines note s: 1 . no purposely added lead. fully eu directive 2002/95/ec (rohs) & 2011/65/eu (rohs 2) compliant. 2. see http://www.diodes.com/quality/lead_free.html for more information about diodes incorporateds definitions of hal ogen - and antimony - free, "green" and lead - f ree . 3. halogen - and antimony - free "green products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds. typical applications circuit pam801 4 in+ gnd out- vdd pvdd pgnd a1 a2 a3 b1 b2 b3 in- sd out+ c1 c2 c3 p v d d v d d o u t + o u t - p g n d g n d s d i n - i n + a u d i o i n p u t 1 f 0 . 1 f 0 . 1 f v d d s h u t d o w n
PAM8014 document number: ds 38114 rev. 1 - 2 2 of 9 www.diodes.com january 2016 ? diodes incorporated new product pin description s pin number pin name function a1 in + positive differential input a2 gnd g round a3 out - negative btl output b1 vdd power supply b2 pvdd power supply b3 pgnd power ground c1 in - negative differential input c2 en chip enable c3 out + positive btl output functional block diagram absolute maximum ratings (@ t a = +25c, unless otherwise specified.) symbol parameter value unit v dd supply voltage (v dd ) 6.0 v v i input voltage (in+, in - , en ) - 0.3 to v dd +0.3 v t s storage temperature - 65 to + 150 c t j maximum junction temperature + 150 c recommended operating conditions (@ t a = +25c, unless otherwise specified.) symbol parameter min max unit v dd supply voltage 2. 5 5.5 v t a operating ambient temperature range - 25 + 85 c t j junction temperature - 40 +125 c + - pwm modulator uvlo startup protection osc bias and vref gate drive gate drive sc protect otp in+ in- pvdd out+ out- gnd vdd pgnd en en r in r in r f r f
PAM8014 document number: ds 38114 rev. 1 - 2 3 of 9 www.diodes.com january 2016 ? diodes incorporated new product electrical characteristics (@ t a = + 25c, v dd = 5v, r in = 0, gain=18db, r l = l(33h)+r+l(33h), unless otherwise specified . ) symbol parameter test conditions min typ max unit v dd supply voltage 2.5 5.5 v p o output power thd+n = 10%, f = 1khz, r = 4 v dd = 5.0v 3.2 w v dd = 3.6v 1.6 thd+n = 1%, f = 1khz, r = 4 v dd = 5.0v 2.45 w v dd = 3.6v 1.3 thd+n = 10%, f = 1khz, r = 8 v dd = 5.0v 1.8 w v dd = 3.6v 0.95 thd+n = 1%, f = 1khz, r = 8 v dd = 5.0v 1.40 w v dd = 3.6v 0.72 thd+n total harmonic distortion plus noise v dd = 5.0v, p o = 1w, r = 8 f = 1khz 0.17 % v dd = 3.6v, p o = 0.1w, r = 8 0.16 v dd = 5.0v, p o = 0.5w, r = 4 f = 1khz 0.14 % v dd = 3.6v, p o = 0.2w, r = 4 0.16 psrr power supply ripple rejection v dd = 3.6v, input ac - ground with c = 1f f = 217hz - 75 db f = 1khz - 75 dyn dynamic range v dd = 5v, thd = 1%, r = 8 f = 1khz 95 db v n output noise input ac - ground no a weighting 60 v a - weighting 40 efficiency r l = 8, thd = 10% f = 1khz 93 % r l = 4, thd = 10% 86 i q quiescent current v dd = 5v no load 4 ma i sd shutdown current v dd = 2.5v to 5v s d = 0v 1 a r ds ( on ) static drain - to - source on - s tate resistor high side pmos, i = 500ma v dd = 5.0v 200 m low side nmos, i = 500ma v dd = 5.0v 200 m f sw switching frequency v dd = 2.5v to 5.5v 250 khz g v closed - l oop gain v dd = 2.5v to 5.5v 8 v/v r in input impedance (in chip) v dd = 2.5v to 5.5v 31 k t on turn - on time v dd = 2.5v to 5.5v 32 m s otp over temperature protection v dd = 2.5v to 5.5v +150 oth over temperature hysterisis v dd = 2.5v to 5.5v +40 v os output offset voltage input ac - ground, v dd = 5v 20 mv v ih en input high voltage v dd = 5v 1.4 v v il en input low voltage v dd = 5v 1.0
PAM8014 document number: ds 38114 rev. 1 - 2 4 of 9 www.diodes.com january 2016 ? diodes incorporated new product performance characteristics (@ t a = +25c, v dd = 5v, r in = 0, gain = 18db, r l = l(33h)+r+l(33h), unless otherwise specified . ) thd+n vs . output power (v dd =5v, r l = 4 ) thd+n v s. output power (v dd =5v, r l = 8 ) thd+n v s. output power (v dd =3.6v, r l = 4 ) thd+n v s. output power (v dd =3.6v, r l = 8 ) thd+n vs . frequency (v dd =5.0v, r l = 4 ) thd+n v s. frequency (v dd =5.0v, r l = 8 ) f=100hz /1khz/10khz red/blue/pink f=100hz /1khz/10khz red/blue/pink f=100hz /1khz/10khz red/blue/pink f=100hz /1khz/10khz red/blue/pink p o =0.5w /1w/2w red/blue/pink p o =0.3w /0.5w/1w red/blue/pink 0 . 01 0 . 01 0 . 01 0 . 01 0 . 02 0 . 02
PAM8014 document number: ds 38114 rev. 1 - 2 5 of 9 www.diodes.com january 2016 ? diodes incorporated new product performance characteristics (@ t a = +25c, v dd = 5v, r in = 0, gain = 18db, r l = l(33h)+r+l(33h), unless otherwise specified . ) psrr v s. frequency (v dd =5.0v, r l = 4 ) psrr v s. frequency (v dd =5.0v, r l = 8 ) frequency response noise floor efficiency v s. output power (v dd =5.0v, r l = 4 ) efficiency v s. output power (v dd =5.0v, r l = 8 ) c in =1 f 0 10 20 30 40 50 60 70 80 90 100 10 50 100 300 500 700 1000 1300 2000 3000 0 20 40 60 80 100 10 50 80 100 150 200 300 500 800 1000 1300 1500 1800 % output power -- mw output power -- mw % - 100 - 100 + 15 - 120
PAM8014 document number: ds 38114 rev. 1 - 2 6 of 9 www.diodes.com january 2016 ? diodes incorporated new product application information close loop gain (g v ) the close loop gain is set by the ratio of the input resistance r in and feedback resistance r f (refer to block diagram) , and the close loop gain equation is as follow: which r f is set at 124k and r in is 31k , the g v default is 8v/v, which is 18db. input capacitor s (c in ) in the typical application, an input capacitor, c in , is required to allow the amplifier to bias the input signal to the proper dc level for optimum operation. in this case, c in and the input impedance r in form is a high - pass filter with the corner frequency determined in the follow equation: it is important to consider the value of c in as it directly affects the low frequency performance of the circuit. for example, when r in is 31k and the specification calls for a flat bass response are down to 150hz. equation is reconfigured as followed: whe n input resistance variation is considered, the c in is 7nf, so one would likely choose a value of 10nf. a further consideration for this capacitor is the leakage path from the input so urce through the input network c in , r in and feedback resistor r f 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 polarized capacit ors are used, the positive side of the capacitor should face the amplifier input in most applications as the dc level is held at v dd /2, which is likely higher than the source dc level. please note that it is important to confirm the capacitor polarity in t he application. decoupling capacitor (cs ) the PAM8014 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 oscillations causing by long lead length betwe en t he 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 highe r frequency transients, spikes, or digital hash on the line, a good low equivalent-series - resistance (esr) ceramic capacitor, typically 1f, is placed as close as possible to the device v dd pin for the best operation. for filtering lower frequency noise signals, a large ceramic capacitor of 10f or greater placed near the aud io power amplifier is recommended. how to reduce emi 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 impedan ce at high frequencies, but low impedance at low frequencies. figure 1 . ferrite bead filter to reduce emi 200pf 200pf out+ out - ferrite bead ferrite bead
PAM8014 document number: ds 38114 rev. 1 - 2 7 of 9 www.diodes.com january 2016 ? diodes incorporated new product application information ( cont .) shutdown operation in order to reduce power consumption while not in use, the PAM8014 contains shutdown circuitry amplifier off when logic low is placed on the en pin. by switching the shutdown pin connected to gnd, the pam801 4 supply current draw will be minimized in idle mode. under voltage lock - out (uvlo) the PAM8014 incorporat es circuitry designed to detect low supply voltage. when the supply voltage drops to 2.0v or below, the PAM8014 goes into a state of shutdown, and the device comes out of its shutdown state and restore to normal function only when v dd higher than 2.2v. sh ort circuit protection (scp) the PAM8014 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 occurs, the device immediately goes into shutd own state. once the short is removed, the device will be reactivated. over temperature protection (otp) thermal protection on the PAM8014 prevents the device from damage when the internal die temperature exceeds + 150c. there is a + 15c 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. the thermal fault is cleared once the temperature o f the die decreased by + 40c. this large hysteresis will prevent motor boating sound well and the device begins normal operation at this point with no external system interaction. pop and click circuitry the PAM8014 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 internal refe rence voltage. the device will remain in mute mode until the reference voltage reach half supply voltage, 1/2 v dd . as soon as the reference voltage is stable, the device will begin full operation. for the best power - off pop performance, the amplifier shoul d be set in shutdown mode prior to removing the power supply voltage. ordering information (note 4 ) PAM8014 x x x a: 9 pin z: u - wlb1313 - 9 r: tape & re e l part number package 7 tape and reel quantity part number suffix PAM8014azr u - wlb1313 - 9 30 00/tape & reel - 7 note : 4 . for packaging det ails, go to our website at http : //www.diodes.com/products/packages.html . package pack ing pin configuration
PAM8014 document number: ds 38114 rev. 1 - 2 8 of 9 www.diodes.com january 2016 ? diodes incorporated new product marking information PAM8014 - u - wlb1313 - 9 package outline dimensions please see ap0200 1 at http://w ww.diodes.com/ _files/ datasheets/ap0200 1 .pdf for the latest version. u - wlb1313 - 9 u - wlb1313 - 9 dim min max typ a 0.500 0.600 0.550 a1 0.185 0.235 0.210 a2 0.315 0.365 0.340 b 0.208 0.308 0.258 d 1.240 -- -- da 0.750 0.850 0.800 e 1.240 -- -- ea 0.750 0.850 0.800 e 0.400 bsc all dimensions in mm bj : product code y: year 0~9 w: week: a~z: 1~26 weeks; a~z: 27~52 weeks; z represents 52 and 53 weeks. d e pin #1 id e 9x-? b a2 a seating plane e a1 da ea
PAM8014 document number: ds 38114 rev. 1 - 2 9 of 9 www.diodes.com january 2016 ? diodes incorporated new product suggested pad layout please see ap0200 1 at http://w ww.diodes.com/ _files/ datasheets/ap0200 1 .pdf for the latest version. u - wlb1313 - 9 important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. diodes incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license unde r its patent or trademark rights, nor the rights of others. any customer or user of t his document or products described herein in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diod es incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthor ized sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising ou t of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. product nam es and markings noted herein may also be covered by one or more united states, internatio nal or foreign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english version of this document is the final and determinative format released by diodes incorporated. life support di odes incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devi ces or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support device or system whose failure to perform can be reasonably expe cted to cause the failure of the life support device or to affect i ts safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support d evices or systems, and acknowledge and agree that they are solely responsible for all legal, regulator y and safety - related requirements concerning their products and any use of diodes incorporated products in such safety - critical, life support devices or systems, notwithstanding any devices - or systems - related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety - critical, life support devices or systems. copyright ? 2016 diodes incorporated www.diodes.com dimensions value (in mm) c 0.400 c1 0.800 c2 0.800 d 0.258 c d (9x) c c1 c2
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