2w+2w output power r l = 8 w @thd = 10% v cc = 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 con- trol circuit power dip-20package description the FC7496L is a stereo 2w+2w class ab power amplifier assembled in the dip-20 package, specially designed for high quality sound, tv and monitor applications. features of the FC7496L include linear volume control, stand-by and mute functions. dip20 volume op amp + - mute/stby protections 9 c2 470nf inr 30k volume op amp + - 30k c8 1000 mf c6 1000 mf c7 1mf r2 10k 4 c3 470nf inl 7 14 11 12 17 65 r1 300k c5 100nf volume outr s1 stby s2 mute outl 1,2,3,13, 18,19,20 c4 470 mf svr 10 v s varout_r 15,16 c9 0.1mf c1 1000mf +v s pw_gnd vol p1 50k log +5v tp1 pw_gnd pw_gnd s_gnd +5v +5v varout_l 60k FC7496L block diagram & application circuit. FC7496L 2w+2w amplifier with dc volume control primarily data jan. 2007
gnd gnd gnd inl varout_l varout_r volume n.c. inr 1 3 2 4 5 6 7 8 9 mute gnd outr v s v s outl gnd gnd gnd 20 19 18 17 16 14 15 13 12 svr 10 stby 11 pin connection thermal data symbol parameter value unit r th j-pins thermal resistance junction-pins max. 15 c/w r th j-amb (*) thermal resistance junction-ambient max. 50 c/w (*) mounted on pcb with no heatsink electrical characteristics (refer to the test circuit v s = 14v; r l = 8 w , r g = 50 w , t amb = 25c). symbol parameter test condition min. typ. max. unit v s supply voltage range 10 18 v i q total quiescent current 25 50 ma dcv os output dc offset referred to svr potenial no input signal 200 mv v o quiescent output voltage 7 v p o output power thd = 10%; r l = 8 w ; 1.6 2 w thd = 1%; r l = 8 w ; 1.3 w thd total harmonic distortion g v = 30db; p o = 1w; f = 1khz; 0.4 % i peak output peak current (internally limited) 0.7 0.9 a v in input signal 2.8 vrms g v closed loop gain vol ctrl > 4.5v 28.5 30 31.5 db g vline monitor out gain vol ctrl > 4.5v; zload > 30k w -1.5 0 1.5 db a min v ol attenuation at minimum volume vol ctrl < 0.5v 80 db bw 0.6 mhz absolute maximum ratings symbol parameter value unit v s dc supply voltage 26 v v in maximum input voltage 8 vpp p tot total power dissipation (t case = 60c) 6 w t amb ambient operating temperature 0 to 70 c t stg , t j storage and junction temperature -40 to 150 c v 6 volume ctrl dc voltage 7 v 0 4 8 12 area(cm 2 ) 30 40 50 60 r thj-a (c/w) copper area 35 m thickness pc board rth with "on board" square heatsink vs. copper area. fc 74 9 6 l 2w+2w amplifier with dc volume control
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 m v f = 20hz to 22khz play, max attenuation 100 250 m v f = 20hz to 22khz mute 60 150 m v sr slew rate 5 8 v/ m s r i input resistance 22.5 30 k w r var out variable output resistance 30 100 w r load var out variable output load 2 k w svr supply voltage rejection f = 1khz; max volume c svr = 470 m f; v rip = 1v rms 35 39 db f = 1khz; max attenuation c svr = 470 m f; v rip =1v rms 55 65 db t m thermal muting 150 c t s thermal shut-down 160 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-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 m a m a play or mute -20 -5 m a i mutebias mute bias current mute 1 5 m a play 0.2 2 m a application suggestions the recommended values of the external components are those shown on the application circuit of fig- ure 1a. different values can be used, the following table can help the designer. component 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 m 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 m f ripple rejection better svr worse svr c5 100nf volume control time constant larger volume regulation time smaller volume regulation time c6 1000 m f output dc decoupling lower low frequency cutoff higher low frequency cutoff c71 m fmute time constantlarger mute on/off timesmaller mute on/off time c8 1000 m f output dc decoupling lower low frequency cutoff higher low frequency cutoff c9 100nf supply voltage bypass danger of oscillation fc 74 9 6 l 2w+2w amplifier with dc volume control
mute stand-by truth table mute st-by operating condition h h standby l h standby h l mute l l play off stby mute play stby off mute v s (v) 5 st-by pin#11 (v) 5 mute pin#12 (v) input (mv) v out (v) i q (ma) v svr pin#10(v) 2.5v 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 connected directly to ground. during the on/off transitions it is re co mmend to that the following conditions are respected. - 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 FC7496L must be brought to mute from the play condition when the svr pin is higher than 2.5v. fc 74 9 6 l 2w+2w amplifier with dc volume control
10 11 12 13 14 15 16 17 18 supply voltage (v) 16 18 20 22 24 26 28 30 32 34 iq (ma) vi=0 quiescent current vs. supply voltage 10 11 12 13 14 15 16 17 18 supply voltage (v) 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 vo dc ( v) vi=0 output dc voltage vs. supply voltage 10 11 12 13 14 15 16 17 18 supply voltage (v) 100 120 140 160 180 200 220 240 260 280 300 vodc-vsvr (v) vi=0 output dc offset vs. supply voltage 10 11 12 13 14 15 16 17 18 supply voltage (v) 0 0.5 1 1.5 2 2.5 3 3.5 4 ouput power (w) thd=10 % thd=1 % rl=8 ohm f= 1 khz output power vs. supply voltage 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 output power (w) 0.01 0.1 1 10 distortion (%) rl=8 ohm vs=12v f=15 khz f=1 khz distortion vs. output power 0.02 0.2 2 20 frequency (khz) 20 21 22 23 24 25 26 27 28 29 30 31 32 closed loop gain (db) rl=8 ohm pout=0.5w cin=470nf cout =1000uf csvr=470 uf closed loop gain vs. frequency fc 74 9 6 l 2w+2w amplifier with dc volume control
00.511.522.533.544.55 vpin # 11 (v) 0 10 20 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 stand-by attenuation (db) rl=8 ohm 0 db @ pout=1w st-by attenuation vs. vpin 11 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 3.6 4 4.4 4.8 5.2 vpin # 12 (v) 0 10 20 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 mute attenuation (db) rl=8 ohm 0 db @ pout=1w mute attenuation vs. vpin 12 + - + - 6k 6k 1k 1k 30k 30k svr 20k 20k v s v s v s out l out r 100 m a pin: svr FC7496L pin description fc 74 9 6 l 2w+2w amplifier with dc volume control
500 m a 30k v s inn svr 6k pins: inl, inr varout-l v s pins: varout-l, varout-r vol v s 10 m a pin: volume 50 m a 200 mute 10k v s pin: mute gnd v s pins: pw-gnd, s-gnd out v s pins: out r, out l 10 m a 65k v s stby 200 pin: stby FC7496L 2w+2w amplifier with dc volume control
dim. mm inch min. typ. max. min. typ. max. a1 0.51 0.020 b 0.85 1.40 0.033 0.055 b 0.50 0.020 b1 0.38 0.50 0.015 0.020 d 24.80 0.976 e 8.80 0.346 e 2.54 0.100 e3 22.86 0.900 f 7.10 0.280 i 5.10 0.201 l 3.30 0.130 z 1.27 0.050 powerdip 20 outline and mechanical data FC7496L 2w+2w amplifier with dc volume control
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