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1/13 TDA7496SA september 2003 this is preliminary information on a new product now in development. details are subject to change without notice. n 5+5w output power r l = 8 w @thd = 10% v cc = 22v n st-by and mute functions n low turn-on turn-off pop noise n linear volume control dc coupled with power op. amp. n no boucherot cell n no st_by rc input network n single supply ranging up to 35v n short circuit protection n thermal overload protection n internally fixed gain n soft clipping n variable output after volume control circuit n clipwatt 15 package description the TDA7496SA is a stereo 5+5w class ab power amplifier assembled i the @clipwatt 15 package, specially designed for high quality sound tv applica- tions. features of the TDA7496SA include linear volume control stand-by and mute functions. the TDA7496SA is pin to pin compatible with tda7496, tda7496s, TDA7496SA, tda7495, tda7495sa, tda7494s, tda7494sa. clipwatt 15 ordering number: TDA7496SA product preview 5w+5w amplifier with dc volume control block diagram volume op amp + - mute/stby protections 1 470nf inr 30k volume op amp + - 30k 1000 m f 1000 m f 1 m f 10k 5 470nf inl 8 s_gnd 2 14 9 10 12 34 300k 100nf volume varout_l outr stby mute outl 11 pw_gnd 470 m f svr 7 d96au440d v s varout_r pw_gnd 15 13 +5v s1 st-by +5v s2 mute +5v s_gnd 60k multipower bi50ii technology
TDA7496SA 2/13 absolute maximum ratings pin connection (top view) thermal data symbol parameter value unit v s dc supply voltage 35 v v in maximum input voltage 8 vpp p tot total power dissipation (t amb = 70c) 16 w t amb ambient operating temperature (1) 0 to 70 c t stg ,t j storage and junction temperature -40 to 150 c v 3 volume control dc voltage 7 v symbol parameter value unit r th j-case thermal resistance junction-case typ. = 4.5; max. = 5 c/w r th j-amb thermal resistance junction-ambient max. 48 c/w electrical characteristcs (refer to the test circuit r l = 8 w , f = 1khz, r g = 50 w , v s = 22v, t amb = 25c) symbol parameter test condition min. typ. max. unit v s supply voltage range 10 32 v i q total quiescent current 25 50 ma dcv os output dc offset referred to svr potential no input signal 200 mv v o quiescent output voltage 11 v p o output power thd = 10%; r l = 8 w ; thd = 1%; r l = 8 w ; 55.5 4 w thd = 10%; r l = 4 w ; v s = 12v thd = 1%; r l = 4 w ; v s = 12v 2.1 1.0 w thd total harmonic distortion g v = 30db; p o = 1w; f = 1khz 0.4 % 1 2 3 4 5 6 7 9 10 11 8 pw_gnd mute stby s_gnd svr n.c. inl varout_l volume varout_r inr 13 14 15 12 pw_gnd outr v s outl d03au1505
3/13 TDA7496SA i peak output peak current (internally limited) 1.0 1.3 a v in input signal 2.8 vrms g v closed loop gain v ol ctrl >4.5v 28.5 30 31.5 db g vline monitor out gain v ol ctrl >4.5v; zload >30k w -1.5 0 1.5 db a min v ol attenuation at minimum volume v ol ctrl <0.5v 80 db bw 0.6 mhz 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 l var out variable output load 2 k w svr supply voltage rejection f = 1khz; max volume c svr = 470 m f; v rip = 1vrms 35 39 db f = 1khz; max attenuation c svr = 470 m f; v rip = 1vrms 55 65 db t m thermal muting 150 c t s thermal shut-down 160 c mute & input selection functions v st-on stand-by on threshold 3.5 v v st-off stand-by off threshold 1.5 v v muteon mute on threshold 3.5 v v muteoff mute off threshold 1.5 v a mute mute attenuation 50 65 db i qst-by quiescent current @ stand-by 0.6 1 ma i stbybias stand-by bias current stand by on: v st-by = 5v; v mute = 5v 80 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 electrical characteristcs (continued) (refer to the test circuit r l = 8 w , f = 1khz, r g = 50 w , v s = 22v, t amb = 25c) symbol parameter test condition min. typ. max. unit
TDA7496SA 4/13 application suggestions the recommended values of the external components are those shown on the application circuit of figure 1. different values can be used, the following table can help the designer. figure 1. application circui 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 c7 1 m f mute time constant larger mute on/off time smaller 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 volume op amp + - mute/stby protections 1 c2 470nf inr 30k volume op amp + - 30k c8 1000 m f c6 1000 m f c7 1 m f r2 10k 5 c3 470nf inl 8 s_gnd 2 14 9 10 12 34 r1 300k c5 100nf volume outr s1 stby s2 mute outl 11 c4 470 m f svr 7 d96au493d v s varout_r pw_gnd 15 13 c9 0.1 m f c1 1000 m f +v s pw_gnd vol p1 50k log +5v tp1 pw_gnd pw_gnd s_gnd +5v +5v varout_l
5/13 TDA7496SA mute stand-by truth table turn on/off sequences (for optimizing the pop performances) figure 1. using only the mute function using only the mute function to semplify the application, the stand-by pin can be connected directly to ground. during the on/off transi- tions is recommended to respect the following conditions: C at the turn-on the transition mute to mute - play must be made when the svr pin is higher than 2.5v C at the turn-off the tda7496a must be brought to mute from the play condition when the svr pin is higher than 2.5v. mute st-by operating condition h h stand-by l h stand-by h l mute llplay off stby mute play stby off mute v s (v) 5 st-by pin#9 (v) 5 mute pin#10 (v) input (mv) v out (v) i q (ma) d97au684 v svr pin#7(v) 2.5v
TDA7496SA 6/13 figure 2. p.c.b. and component layoutpcb and component layout figure 3.
7/13 TDA7496SA figure 4. quiescent current vs. supply voltage figure 5. output dc offset vs. supply voltage figure 6. output power vs. supply voltage figure 7. output dc offset vs. supply voltage figure 8. output power vs supply voltage figure 9. distortion vs output power 10 12 14 16 18 20 22 24 26 28 30 32 16 18 20 22 24 26 28 30 supply voltage (v) iq (ma) vi=0 d03au1494 10 12 14 16 18 20 22 24 26 28 30 32 4 5 6 7 8 9 10 11 12 13 14 15 16 supply voltage (v) vi=0 vodc (v) d03au1495 10 12 14 16 18 20 22 24 26 0 1 2 3 4 5 6 7 8 output power (w) rl=8 w f=1khz thd=10% thd=1% d03au1497 supply voltage (v) 10 12 14 16 18 20 22 24 26 28 30 32 100 120 140 160 180 200 220 240 260 280 supply voltage (v) vi=0 vodc-vsvr (mv) d03au1496/mod 10 10.5 11 11.5 12 12.5 13 13.5 14 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 output power (w) rl=4 w f=1khz thd=10% thd=1% d03au1498 supply voltage (v) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.1 0.01 1 distortion (%) vs=22v rl=8 w f=15khz f=1khz d03au1499 output power (w)
TDA7496SA 8/13 figure 10. distortion vs output power figure 11. closed loop gain vs. frequency figure 12. st-by attenuation vs vpin 9 figure 13. mute attenuation vs vpin 10 pins description figure 14. pin svr figure 15. pins: inl,inr distortion (%) vs=12v rl=4 w f=15khz f=1khz d03au1500 output power (w) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.1 0.01 1 20 0.02 0.2 2 20 22 24 26 28 30 closed loop gain (db) frequency (khz) d03au1501 rl=8 w pout=0.5w cin=470nf cout=1000 m f csvr=470 m f 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 st-by attenuation (db) vpin # 9 (v) d03au1502 rl=8 w 0db @ pout=1w -140 -120 -100 -80 -60 -40 -20 0 mute attenuation (db) -120 -100 -80 -60 -40 -20 0 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 vpin # 10 (v) d03au1503 rl=8 w 0db @ pout=1w + - + - 6k 6k 1k 1k 30k 30k svr 20k 20k v s v s v s out l out r 100 m a d97au585a 500 m a 30k v s inn svr d97au589 6k
9/13 TDA7496SA figure 17. pin st-by figure 18. pin: mute figure 19. pins: out r, out l figure 20. pins: varout-l varout-r figure 21. pin: volume figure 22. pins: pw-gnd, s-gnd 10 m a 65k v s stby d97au594 200 50 m a 200 mute d97au592 10k v s out d97au588 v s varout-l d97au590 v s vol d97au591 v s 10 m a gnd d97au59 3 v s
TDA7496SA 10/13 heat sink dimensioning: in order to avoid the thermal protection intervention, that is placed approximatively at t j = 150c, it is important the dimensioning of the heat sinker r th (c/w). the parameters that influence the dimensioning are: C maximum dissipated power for the device (p dmax ) C max thermal resistance junction to case (r th j-c ) C max. ambient temperature t amb max C quiescent current i q (ma) example: v cc = 22v, r load = 8ohm, r th j-c = 5 c/w , t amb max = 50c p dmax = (n channels) p dmax = 2 ( 3.0 ) + 0.5 = 6.5 w (heat sinker) in figure 23 is shown the power derating curve for the device. figure 23. power derating curve v cc 2 2 p 2 r load ------------------------------ i q v cc + r th c-a 150 t amb max C p d max ---------------------------------------- - r th j-c C 150 50 C 6.5 ---------------------- 5.0 C 10 c/w === a) infinite heatsink b) 7 c/ w c) 10 c/ w (c) (a) (b) 0 5 10 15 20 0 40 80 120 160 tamb (c) pd (w) a) infinite heatsink b) 7 c/ w c) 10 c/ w (c) (a) (b) 0 5 10 15 20 0 40 80 120 160 tamb (c) pd (w)
11/13 TDA7496SA clipwatt assembling suggestions the suggested mounting method of clipwatt on external heat sink, requires the use of a clip placed as much as possible in the plastic body center, as indicated in the example of figure 24. a thermal grease can be used in order to reduce the additional thermal resistance of the contact between pack- age and heatsink. a pressing force of 7 - 10 kg gives a good contact and the clip must be designed in order to avoid a maximum contact pressure of 15 kg/mm2 between it and the plastic body case. as example , if a 15kg force is applied by the clip on the package , the clip must have a contact area of 1mm2 at least. figure 24. example of right placement of the clip
TDA7496SA 12/13 outline and mechanical data 0044538 dim. mm inch min. typ. max. min. typ. max. a 3.2 0.126 b 1.05 0.041 c 0.15 0.006 d 1.55 0.061 e 0.49 0.55 0.019 0.022 f 0.67 0.73 0.026 0.029 g 1.14 1.27 1.4 0.045 0.050 0.055 g1 17.57 17.78 17.91 0.692 0.700 0.705 h1 12 0.480 h2 18.6 0.732 h3 19.85 0.781 l 17.95 0.707 l1 14.45 0.569 l2 10.7 11 11.2 0.421 0.433 0.441 l3 5.5 0.217 m 2.54 0.100 m1 2.54 0.100 clipwatt15 weight: 1.92gr
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners ? 2003 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states www.st.com 13/13 TDA7496SA

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