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TDA7264 TDA7264a 25 + 25w stereo amplifier with mute/st-by wide supply voltage range (up to 50v abs max.) split supply high output power: 25 + 25w @ thd =10%, r l = 8 w , v s = +20v no pop at turn-on/off mute (pop free) stand-by feature (low i q ) few external components short circuit protection thermal overload protection description the TDA7264/TDA7264a is class ab dual audio power amplifier assembled in the multiwatt pack- age, specially designed for high quality sound ap- plication as hi-fi music centers and stereo tv sets. april 1999 ? ordering number: TDA7264 (multiwatt 8) TDA7264a (multiwatt 11) +5v 18k 15k in (l) 1 m f 15k 1 m f mute/ st-by gnd in (r) 1 m f 4.7 w 4.7 w 100nf 100nf out (l) out (r) 1000 m f 1000 m f +v s 2 4 6 7 5 8 1 3 + + - - d94au069a rl (l) rl (r) +v s -v s m p figure 1: typical application circuit for TDA7264 multiwatt 8 multiwatt 11 1/12
absolute maximum ratings symbol parameter value unit v s dc supply voltage 50 v i o output peak current (internally limited) 4.5 a p tot power dissipation t case = 70 c30w t stg , t j storage and junction temperature -40 to +150 c pin connection (top view) thermal data symbol description value unit r th j-case thermal resistance junction-case max 2 c/w +5v 18k 15k in (l) 1 m f 15k 1 m f mute/ st-by gnd in (r) 1 m f 4.7 w 4.7 w 100nf 100nf out (l) out (r) 1000 m f 1000 m f +v s 3 5 7 9 6 11 2 4 + + - - d98au955 rl (l) rl (r) -v s m p 1 figure 2: typical application circuit for TDA7264a 1 2 3 4 5 6 7 d94au096 8 in (1) gnd in (2) -v s mute/st-by output (2) +v s output (1) tab connected to pin 5 1 2 3 4 5 6 7 9 10 11 8 in(1) not connected gnd not connected in(2) -v s stby/mute output(2) +v s output(1) -v s tab connected to pin 6 d98au956 multiwatt 8 multiwatt 11 TDA7264 - TDA7264a 2/12
electrical characteristics (refer to the test circuit, v s + 20v; r l = 8 w ; r s =50 w ; f = 1khz; t amb = 25 c, unless otherwise specified.) symbol parameter test condition min. typ. max. unit v s supply range +5 +22.5 v i q total quiescent current 80 130 ma p o music output power (*) thd = 10%; r l = 8 w ; v s + 22.5v 32 w p o output power thd = 10% r l = 8 w ; v s + 16v; r l = 4 w 20 25 25 w w thd = 1% r l = 8 w ; v s + 16v; r l = 4 w 20 20 w w thd total harmonic distortion r l = 8 w ; p o = 1w; f = 1khz 0.02 % r l = 8 w ; p o = 0.1 to 15w; f = 100hz to 15khz 0.5 % r l = 4 w ; p o = 1w; f = 1khz 0.03 % r l = 4 w ; v s + 16v; p o = 0.1 to 12w; f = 100hz to 15khz 1% c t cross talk f = 1khz f = 10khz 70 60 db db sr slew rate 10 v/ m s g v closed loop voltage gain 29 30 31 db d g v voltage gain matching 0.2 db e n total input noise a curve f = 20hz to 22khz 2.5 3.5 8 m v m v r i input resistance 15 20 k w svr supply voltage rejection (each channel) fr = 100hz; vripple = 0.5v rms 60 db t j thermal shut-down junction temperature 145 c mute function [ref: +v s ] vt mute mute / play threshold -7 -6 -5 v a m mute attenuation 60 90 db stand-by function [ref: +v s ] vt st-by stand-by / mute threshold -3.5 -2.5 -1.5 v a st-by stand-by attenuation 110 db i q st-by quiescent current @ stand-by 3 ma note : (*) full power up to . v s = 22.5v with r l = 8 w and v s = 16v with r l = 4 w music power is the maximal power which the amplifier is capable of producing across the rated load resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1khz. TDA7264 - TDA7264a 3/12
sw1 st-by r1 dz q1 r3 18k r4 15k in (l) c1 1 m f r2 15k c3 1 m f mute/ st-by gnd sw2 mute in (r) c2 1 m f r5 4.7 w r6 4.7 w c8 100nf c9 100nf out (l) out (r) c7 100nf c6 1000 m f c5 100nf c4 1000 m f +v s 2 4 6 7 5 8 1 3 + + - - d94au068b rl (l) rl (r) +v s -v s figure 3: demo board schematic TDA7264 figure 3a: p.c. board and component layout of the demo board schematic TDA7264 (1:1 scale) TDA7264 - TDA7264a 4/12
r3 in (l) c1 r2 c3 mute/ st-by gnd in (r) c2 r7 r10 c8 c9 out (l) out (r) c6 c4 +v s 3 5 7 9 6 11 2 4 + + - - d98au957 rl (l) rl (r) +v s -v s 1 sw1 r1 dz r4 sw2 c7 c5 q1 st-by mute figure 4: demo board schematic TDA7264a figure 4a: p.c. board and component layout of the demo board schematic TDA7264a (1:1 scale) TDA7264a TDA7264 - TDA7264a 5/12
components recommended value purpose larger than recommended value smaller than recommended value r1 10k w mute circuit increase of dz biasing current r2 15k w mute circuit v pin # 4 shifted downward v pin # 4 shifted upward r3 18k w mute circuit v pin # 4 shifted upward v pin # 4 shifted downward r4 15k w mute circuit v pin # 4 shifted upward v pin # 4 shifted downward r5, r6 4.7 w frequency stability danger of oscillations danger of oscillations c1, c2 1 m f input dc decoupling higher low frequency cutoff c3 1 m f st-by/mute time constant larger on/off time smaller on/off time c4, c6 1000 m f supply voltage bypass danger of oscillations c5, c7 0.1 m f supply voltage bypass danger of oscillations c8, c9 0.1 m f frequency stability dz 5.1v mute circuit q1 bc107 mute circuit applications suggestion for TDA7264 (demo board schematic) the recommended values of the external compo- nents are those shown on the demo board sche- matic. different values can be used: the following table can help the designer. mute, stand-by truth table sw1 sw2 a a stand-by a b stand-by b b mute b a play components recommended value purpose larger than recommended value smaller than recommended value r1 10k w mute circuit increase of dz biasing current r2 15k w mute circuit v pin # 5 shifted downward v pin # 5 shifted upward r3 18k w mute circuit v pin # 5 shifted upward v pin # 5 shifted downward r4 15k w mute circuit v pin # 5 shifted upward v pin # 5 shifted downward r7, r10 4.7 w frequency stability danger of oscillations danger of oscillations c1, c2 1 m f input dc decoupling higher low frequency cutoff c3 1 m f st-by/mute time constant larger on/off time smaller on/off time c4, c6 1000 m f supply voltage bypass danger of oscillations c5, c7 0.1 m f supply voltage bypass danger of oscillations c8, c9 0.1 m f frequency stability dz 5.1v mute circuit q1 bc107 mute circuit applications suggestion for TDA7264a (demo board schematic) the recommended values of the external compo- nents are those shown are the demo board sche- matic different values can be used: the following table can help the designer. TDA7264 - TDA7264a 6/12
figure 8: distortion vs. output power figure 7: output power vs supply voltage figure 5: quiescent current vs. supply voltage figure 6: frequency response figure 9: crosstalk vs. frequency figure 10: supply voltage rejection vs. fequency TDA7264 - TDA7264a 7/12
figure 12: power dissipation vs. output power figure 11: attenuation & total quiescent cur- rent vs. v pin4 voltage TDA7264 - TDA7264a 8/12
t off stdby mute mute mute mute play stdby play off stdby 20 +v s (v) -20 -v s v in (mv) vpin4 (v) v s v s -2.5 v s- 6 v s -10 i q (ma) 0 vout (v) d94au084 figure 13 mute stand-by function the pin 4 (mute/stand-by) controls the ampli- fier status by two different thresholds, referred to +v s . - when v pin4 higher than = +v s - 2.5v the amplifier is in stand-by mode and the final stage generators are off - when v pin4 is between +v s - 2.5v and +v s - 6v the final stage current generators are switched on and the amplifier is in mute mode - when v pin4 is lower than +v s - 6v the am- plifier is play mode. TDA7264 - TDA7264a 9/12
multiwatt8 (pin. 5 gnd) dim. mm inch min. typ. max. min. typ. max. a 5 0.197 b 2.65 0.104 c 1.6 0.063 e 0.49 0.55 0.019 0.022 f 0.78 0.85 0.030 0.033 g 2.40 2.54 2.68 0.094 0.10 0.105 g1 17.64 17.78 17.92 0.69 0.70 0.71 h1 19.6 0.772 h2 20.2 0.795 l 20.35 20.65 0.80 0.81 l2 17.05 17.20 17.35 0.67 0.68 0.68 l3 17.25 17.5 17.75 0.679 0.689 0.699 l4 10.3 10.7 10.9 0.406 0.421 0.429 l7 2.65 2.9 0.104 0.114 s 1.9 2.6 0.075 0.102 s1 1.9 2.6 0.075 0.102 u 0.40 0.55 0.015 0.022 z 0.70 0.85 0.028 0.034 dia1 3.65 3.85 0.144 0.152 outline and mechanical data TDA7264 - TDA7264a 10/12
multiwatt11 v dim. mm inch min. typ. max. min. typ. max. a 5 0.197 b 2.65 0.104 c 1.6 0.063 d 1 0.039 e 0.49 0.55 0.019 0.022 f 0.88 0.95 0.035 0.037 g 1.45 1.7 1.95 0.057 0.067 0.077 g1 16.75 17 17.25 0.659 0.669 0.679 h1 19.6 0.772 h2 20.2 0.795 l 21.9 22.2 22.5 0.862 0.874 0.886 l1 21.7 22.1 22.5 0.854 0.87 0.886 l2 17.4 18.1 0.685 0.713 l3 17.25 17.5 17.75 0.679 0.689 0.699 l4 10.3 10.7 10.9 0.406 0.421 0.429 l7 2.65 2.9 0.104 0.114 m 4.25 4.55 4.85 0.167 0.179 0.191 m1 4.73 5.08 5.43 0.186 0.200 0.214 s 1.9 2.6 0.075 0.102 s1 1.9 2.6 0.075 0.102 dia1 3.65 3.85 0.144 0.152 outline and mechanical data TDA7264 - TDA7264a 11/12
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsib ility for the cons equences 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. specification mentioned in this pu blication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectron ics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicr oelectronics. the st logo is a registered trademark of stmicroelectronics ? 1999 stmicroelectronics C printed in italy C all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - france - germany - italy - japan - korea - malaysia - malta - mexico - morocco - the neth erlands - singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a. http://www.st.com TDA7264 - TDA7264a 12/12

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