technical data KL7496L 2w+2w amplifier with dc volume control description ordering information KL7496L plastic t a = 0 to 70 c the KL7496L is a stereo 2w+2w class ab power amplifier assembled in the @ powerdip 14+3+3 package, specially designed for high quality sound, tv and monitor applications. features of the KL7496L include linear volume control, stand-by and mute functions. ? 2w+2w output power rl = 8 ? @thd = 10% vcc = 14v ? st-by and mute functions ) ? low turn-on turn-off pop noise ? linear volume control dc coupled with power op. amp. ? no boucherot cell ? no st-by rc input network ? single supply ranging up to 15v ? short circuit protection ? thermal overload protection ? internally fixed gain ? soft clipping ? variable output after volume control circuit ? powerdip (14+3+3) package block diagram 1
KL7496L absolute maximum ratings symbol parameter value unit vs dc supply voltage 26 v v in maximum input voltage 8 vpp t amb ambient operating temperature 0 to 70 oc t stg , tj storage and junction temperature -40 to 150 oc v 6 volume ctrl dc voltage 7 v pin connection gnd gnd gnd gnd gnd gnd inl outl varout_l volume varout_r nc inr svr stby mute gnd outr v s v s 1 2 3 4 5 20 19 18 17 16 6 7 8 9 10 15 14 13 12 11 rth with "on board" square heatsink vs. copper area. thermal data symbol parameter value unit rth j-pins thermal resistance junction-pins max. 15 c/w rth j-amb (*) thermal resistance junction-ambient max. 50 c/w (*) mounted on pcb with no heatsink electrical characteristics (refer to the test circuit vs = 14v, r l = 80 ? ,rg = 50 ? , tam = 25oc) symbol parameter test condition min typ max unit vs supply voltage range 10 18 v iq total quiescent current 25 50 ma dc/vos output dc offset referred to svr potenial 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 28.5 30 31.5 db g vline monitor out gain vol ctrl > 4.5v, zload > 30k ? -1.5 0 1.5 db a min v ol attenuation at minimum volume vol ctrl < 0.5v 80 db bw 0.6 mhz 2
KL7496L 3 electrical characteristics (continued) symbol parameter test condition min typ max unit e n total output noise f = 20hz to 22khz play, max volume 500 800 v f = 20hz to 22khz play, max attenuation 100 250 v f = 20hz to 22khz mute 60 150 v sr slew rate 5 8 v/ s r i input resistance 22.5 30 k ? r var out variable output resistance 30 100 ? r load var out variable output load 2 k ? svr supply voltage rejection f = 1khz, max volume c svr = 470 f, v rip = 1v rms 35 39 db f = 1khz, max attenuation c svr = 470 f, v rip = 1v rms 55 65 db t m thermal muting 150 oc t s thermal shut-down 160 oc 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-by quiescent current @ stand-by 0.6 1 ma a mute mute attenuation 50 65 db i stbybias stand-by bias current stand by on v st-by = 5v v mute = 5v 80 a a play or mute -20 -5 a i mutebias mute bias current mute 1 5 a play 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 used, the fo llowing table can help the designer. componen t suggestion value purpose larger than suggestion smaller than suggestion r1 300k volume control circuit larger volume regulation time smaller volume regulation time r2 10k mute time constant larger mute on/off time smaller mute on/off time p1 50k volume control circuit c1 1000 f supply voltage bypass 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 time smaller volume regulation time c6 1000 f output dc decoupling lower low freque ncy cutoff higher low frequency cutoff c7 1 f mute time constant larger mute on/off time smaller mute on/off time c8 1000 f output dc decoupling lower low freque ncy cutoff higher low frequency cutoff c9 100nf supply voltage bypass danger of oscillation
KL7496L figure 1 a. application circuit mute stand-by truth table mute st-by operating conditio h h standby l h standby h l mute l l play 4
KL7496L turn on/off sequences (for optimizing the pop performances) a) using mute and stand-by functions b) using only the mute function to simplify 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 mute-play must be made when the svr pin is higher than 2.5v - at the turn-off, the KL7496L must be brought to mute from the play condition when the svr pin is higher than 2.5v 5
KL7496L 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 6
KL7496L st-by attenuation vs. vpin 11 mute attenuation vs. vpin 12 7
KL7496L package dimension n suffix plastic dip (ms - 001ad) symbol min max a 24.89 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 notes: l 7.62 8.26 1. dimensions ?a?, ?b? do not include mold flash or protrusions. m 0.20 0.36 maximum mold flas h or protrus ions 0.25 mm (0.010) per s ide. n 0.38 dimens ion, mm 2.54 7.62 l h m j a b f g d seating plane n k 0.25 (0.010) m t -t- c 1 20 10 11 8
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