technical data ILA7496L 2w+2w amplifier with dc volume control description ordering information il7496l pl ast i c t a = 0 to 7 0 c the il7496l is a stereo 2w +2w class ab power am plifier assem b led in the @ powerdip 14+3+3 package, specially designed for high quality sound, tv and monitor applications. features of the il7496l include linear volum e control, stand-by and m u te functions. ? 2w +2w output pow e r rl = 8 ? @thd = 10% vcc = 14v ? st-by and mute functions ) ? low turn-on turn-off pop noise ? linear volume control dc coupled w i th pow e r op. amp. ? no b ouc her o t c ell ? no st-by rc input netw ork ? single supply ranging up to 15v ? shor t c i r c u it pr otec tion ? ther m a l over l oad pr otec tion ? internally fixed gain ? soft clipping ? variable output after vol u me cont rol circuit ? pow e rdip (14+3+3) package block diagram + - op a m p 71 5 , 1 6 v a rout_r v s vo l u me 30 k 4 70nf inr m u te /s tb y p r ot e c tions 60 k + - op a m p 30k vo l u me 4 70nf inl 470 f sv r 1 0 vo l u m e 6 5 v a rout_l gnd 1,2,3, 13, 18,19 ,20 3 00k 1 00nf +5v 4 9 1 000 f out r st by mu t e s1 st -b y s2 mu t e +5 v +5 v 10k 1f 1000 f out l 14 11 12 17 s_ g n d
ILA7496L absolute maximum ratings sy mbol parameter value unit vs dc supply voltage 26 v v in maximum input voltage 8 vpp t am b ambient operating temperature 0 to 70 o c t stg , tj storage and junction temperature -40 to 150 o c v 6 volume ctrl dc voltage 7 v pin connection electrical characteristics (refer to the test circuit vs = 14v, r l = 80 ? ,rg = 50 ? , tam = 25o c) sy mbol p a r a m e t e r t e s t c o n d i t i o n m i n typ m a x u n i t vs supply voltage range 10 18 v iq total quiescent current 25 50 ma dc/vos output dc offset referred to svr pote nia l no input signal 200 mv vo quiescent output voltage 7 v po output power thd = 10%, r l = 8 ? 1 . 6 2 w thd = 1%, r l = 8 ? 1 . 3 w thd total harmonic distortion gv = 30db, po = 1w, f = 1khz 0.4 % i peak output peak current (internally limited) 0.7 0.9 a v in input signal 2.8 vrms gv closed loop gain vol ctrl > 4.5v 2 8 . 5 3 0 3 1 . 5 d b g vline monitor out gain vol ctrl > 4.5v, zload > 30k ? - 1 . 5 0 1 . 5 d b a min v ol attenuation at minimum volume vol ctrl < 0.5v 8 0 d b b w 0 . 6 m h z
ILA7496L electrical characteristics (cont i nued) sy mbol p a r a m e t e r t e s t c o n d i t i o n m i n typ m a x u n i t e n total output noise f = 20hz to 22khz play , max volume 5 0 0 8 0 0 v f = 20hz to 22khz play , max attenuation 1 0 0 2 5 0 v f = 20hz to 22khz mute 6 0 1 5 0 v s r s l e w ra te 5 8 v/ s r i input resistance 2 2 . 5 3 0 k ? r var out variable output res i s t ance 3 0 1 0 0 ? r load var out variable output load 2 k ? svr supply voltage rejection f = 1khz, max volume c sv r = 470 f, v ri p = 1v rm s 3 5 3 9 d b f = 1khz, max attenuation c sv r = 470 f, v ri p = 1v rm s 5 5 6 5 d b t m therm a l muting 1 5 0 o c t s thermal shut-down 1 6 0 o c mute stand-by & input selection functions v st on stand-by on threshold 3 . 5 v v st off stand-by off threshold 1 . 5 v v m on mute on threshold 3 . 5 v v m off mute off threshold 1 . 5 v i qst-b y quiescent current @ stand-by 0 . 6 1 m a a mute m u t e a t t e n u a t i o n 5 0 6 5 d b i stby b i as stand-by bias current stand by on v st- b y = 5v v mute = 5v 8 0 a a play or mute - 2 0 - 5 a i mute b i as mute bias current mute 1 5 a pla y 0 . 2 2 a appication suggestions the recommended values of the external components are those shown on the application circuit of figure 1a. different values can be us ed, the fo llowing table can help the designer. componen t suggestion value p u r p o s e l a r g e r t h a n suggestion smaller than suggestion r1 300k volume control circuit larger volume regulation tim e smaller volume regulation tim e r2 10k mute tim e constant larger m u te on/off tim e sm aller m u te on/off tim e p1 50k volume control circuit c1 1000 f supply voltage by pass danger of oscillation c2 470nf input dc decoupling lower low frequency cutoff higher low frequency cutoff c3 470nf input dc decoupling lower low frequency cutoff higher low frequency cutoff c4 470 f ripple rejection better svr worse svr c5 100nf volume control time constant larger volume regulation tim e smaller volume regulation tim e c6 1000 f output dc decoupling lower low freque ncy cutoff higher low frequency cutoff c7 1 f mute tim e constant larger m u te on/off tim e sm aller m u te on/off tim e c8 1000 f output dc decoupling lower low freque ncy cutoff higher low frequency cutoff c9 100nf supply voltage by pass danger of oscillation
ILA7496L figure 1a. application circuit
ILA7496L mute stand-by truth table m u t e s t - b y o p e r a t i n g c o n d i t i o h h s t a n d b y l h s t a n d b y h l m u t e l l p l a y turn on/off sequences (for optimiz i ng the pop performances) a) using m u te and stand-by functions b) using only the mute function to sim p lify the application, the stand-by pin can be c onnected directly to ground. during the on/off transitions is recommend to respect the following conditions. - at the turn-on, the transition m u te-play m u st be made when the svr pin is higher than 2.5v - at the turn-off, the il7496l m u st be brought to m u te from the play condition when the svr pin is higher than 2.5v
ILA7496L quiescent current vs. supply voltage output dc voltage vs. supply voltage output dc offset vs. supply voltage output power vs. supply voltage distortion vs. output power closed loop gain vs. frequency
ILA7496L st-by attenuation vs. vpin 11 mute attenuation vs. vpin 12
ILA7496L package dimension n s u f f i x p l as t i c d i p (m s - 0 0 1 a d) sy m b o l m i n m a x a 24. 8 9 26. 92 b 6. 10 7. 11 c 5. 33 d 0. 36 0. 56 f 1. 14 1. 78 g h j 0 10 k 2. 92 3. 81 no t e s : l 7. 62 8. 26 1. d i m e n s i o n s ?a ?, ?b ? d o n o t i n cl u d e m o l d f l as h o r p r o t r u s i o n s . m 0. 20 0. 36 m a x i m u m m o l d f l a s h o r p r o t r u s i o n s 0. 25 m m ( 0 . 010) p e r s i d e . n 0. 38 d i me n s i o n , mm 2. 54 7. 62 l h m j a b f g d se a t i n g pl an e n k 0.2 5 ( 0 . 010) m t -t - c 1 20 10 11
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