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1/12 TDA7265SA july 2004 1 features wide supply voltage range (up to +25v abs max.) split supply high output power 18+18w @thd = 10%, r l = 8 ? , v s = 17.5v no pop at turn-on/off mute (pop free) stand-by feature (low i q ) short circuit protection to gnd thermal overload protection clipwatt 11 package 2 description the TDA7265SA is class ab dual audio power amplifier assembled in the @ clipwatt 11 pack- age, specially designed for high quality sound ap- plication as hi-fi music centers and stereo tv sets. the TDA7265SA is pin to pin compatible with tda7269, tda7269a, tda7269sa, tda7265, tda7499, tda7499sa. 18w+18w stereo amplifie r with mute & st-by figure 2. test and application diagram +5v 18k 15k in (l) 1 f 15k 1 f mute/ st-by gnd in (r) 1 f 4.7 ? 4.7 ? 100nf 100nf out (l) out (r) 1000 f 1000 f +v s 3 5 7 9 6 11 2 4 + + - - d94au085 rl (l) rl (r) -v s p 560 ? 18k in- (l) 8 10 in- (r) 1 560 ? 18k fi gure 1. p ac k age table 1. order codes part number package TDA7265SA clipwatt11 clipwatt11 rev. 2
TDA7265SA 2/12 table 2. absolute maximum ratings figure 3. pin connection (top view) table 3. thermal data figure 4. single supply application symbol parameter value unit v s dc supply voltage 25 v i o output power current (internally limited) 4.5 a p tot total power dissipation (tamb = 70c) 30 w t amb ambient operating temperature (1) 0 to 70 c t stg , t j storage and junction temperature -40 to 150 c symbol parameter value unit r th j-case thermal resistance junction-case max = 3 c/w r th j-amb thermal resistance junction-ambient 48 c/w 1 2 3 4 5 6 7 9 10 11 8 in+(1) in-(1) gnd in-(2) in+(2) -v s mute output(2) +v s output(1) -v s d03au1506 play 5v r2 15k in (l) c3 1 f r1 10k c1 1 f mute in (r) c4 1 f r8 4.7 ? r7 1k c7 0.1 f out (l) out (r) c5 1000 f +v s 3 5 7 9 6 11 2 4 + + - - d96au444a out (l) out (r) gnd r4 30k in- (l) 8 10 in- (r) 1 r5 1k r6 30k r9 4.7 ? c9 470 f c10 470 f c8 0.1 f r3 15k 0 mute q1 bsx33 c6 0.1 f d1 5.1v c2 100 f
3/12 TDA7265SA (*) in mute condition the current drawn from pin 5 must be 650 a table 4. electrical characteristcs (refer to the test circuit v s = 17.5v; r l = 8 ? ; r s = 50 ? ; g v = 30db, f = 1khz; t amb = 25c, unless otherwise specified) symbol parameter test condition min. typ. max. unit v s supply voltage range 5 25 v i q total quiescent current 80 130 ma v os input offset voltage -20 20 mv i b non inverting input bias current 500 na p o output power thd = 10%; r l = 8 ? ; v s = 13v; r l = 4 ? ; 18 18 w w thd = 1%; r l = 8 ? ; v s = 13v; r l = 4 ? ; 13 13 w w thd total harmonic distortion r l = 8 ? ; p o = 1w; f = 1khz; 0.03 % r l = 8 ? ; p o = 0.1 to 5w; f = 100hz to 15khz; 0.7 % r l = 4 ? ; p o = 1w; f = 1khz; 0.02 % r l = 4 ? ; v s = 10v; p o = 0.1 to 5w; f = 100hz to 15khz; 1% c t cross talk f = 1khz; f = 10khz; 70 60 db db sr slew rate 6.5 10 v/ s g ol open loop voltage gain 80 db e n total output noise a curve f = 20hz to 22khz 3 48 v v r i input resistance 15 20 k ? svr supply voltage rejection (each channel) f = 100hz; v r = 0.5v 60 db t j thermal shut-down junction temperature 145 c mute function [ref +v s ] (*) v mute mute /play threshold -7 -6 -5 v a mute mute attenuation 60 70 db stand-by functions [ref: +v s ] (only for split supply) v st-by stand-by mute threshold -3.5 -2.5 -1.5 v a st-by stand-by attenuation 110 db i qst-by quiescent current @ stand-by 3 6 ma
TDA7265SA 4/12 3 mute stand-by function the pin 5 (mute/stand-by) controls the amplifier status by two different thresholds, referred to +v s . ? when v pin5 higher than = +v s -2.5v the amplifier is in stand-by mode and the final stage generators are off. ? when v pin5 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 pin5 lower than = +v s -6v the amplifier is play mode. figure 5. t off stdby mute mute mute mute play stdby play off stdby 20 +v s (v) -20 -v s v in (mv) vpin5 (v) v s v s -2.5 v s- 6 v s -10 i q (ma) 0 vout (v) d94au086
5/12 TDA7265SA figure 6. test and applicati on circuit (stereo configuration) 4 application suggestions (demo board schematic) the recommended values of the external components are those shown the demoboard schematic different val- ues can be used, the following table can help the designer table 5. . (*) closed loop gain has to be 25db component suggestion value purpose larger than recommended value smaller than recommended value r1 10k ? mute circuit increase of dz biasing current r2 15k ? mute circuit v pin #5 shifted downward v pin #5 shifted upward r3 18k ? mute circuit v pin #5 shifted upward v pin #5 shifted downward r4 15k ? mute circuit v pin #5 shifted upward v pin #5 shifted downward r5, r8 18k ? closed loop gain setting (*) increase of gain r6, r9 560 ? decrease of gain r7, r10 4.7 ? frequency stability danger of oscillations danger of oscillations c1, c2 1 f input dc decoupling higher low frequency cutoff c3 1 f st-by/mute time constant larger on/off time smaller on/off time c4, c6 1000 f supply voltage bypass danger of oscillations c5, c7 0.1 f supply voltage bypass danger of oscillations c8, c9 0.1 f frequency stability dz 5.1v mute circuit 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 + + - - d94au087b rl (l) rl (r) +v s -v s r9 r5 in- (l) 8 10 in- (r) 1 sw1 r1 dz r4 sw2 c7 r8 r6 c5 q1 st-by mute
TDA7265SA 6/12 5 pc board figure 7. evaluation board top layer layou figure 8. evaluation board bottom layer layout figure 9. component layout
7/12 TDA7265SA figure 10. quiescent current vs. supply voltage figure 11. frequency response figure 12. output power vs. supply voltage figure 13. output power vs. supply voltage figure 14. quiescent current vs. pin #5 voltage figure 15. attenuation vs. pin #5 voltage
TDA7265SA 8/12 figure 16. svr vs. frequency figure 17. attenuation vs. pin #5 voltage figure 18. power dissipation vs. output power figure 19. power dissipation vs. output power 6 heat sink dimensioning: in order to avoid the thermal protection intervention, that is placed approximatively at t j = 150c, it is im- portant the dimensioning of the heat sinker r th (c/w). the parameters that influence the dimensioning are: ? maximum dissipated power for the device (p dmax ) ? max thermal resistance junction to case (r th j-c ) ? max. ambient temperature t amb max ? quiescent current i q (ma) example: v cc = 17.5v, r load = 8ohm, r th j-c = 3 c/w , t amb max = 50c p dmax = (n channels) 2v cc 2 2 r load ? -------------------------- i q v cc ? +
9/12 TDA7265SA p dmax = 2 ( 7.7 ) + 1.0 = 16 w (heat sinker) in figure 20 is shown the power derating curve for the device. figure 20. power derating curve 7 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 21. 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/mm 2 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 1mm 2 at least. figure 21. example of right placement of the clip r th c-a 150 t amb max ? p d max ---------------------------------------- - r th j-c ? 150 50 ? 16 ---------------------- 3 ? 3.25 c/w === a) infinite heatsink b) 1.5 c/ w c) 3.0 c/ w (c) (a) (b) 0 5 10 15 20 25 30 35 0 40 80 120 160 tamb (c) pd (w) a) infinite heatsink b) 1.5 c/ w c) 3.0 c/ w (c) (a) (b) 0 5 10 15 20 25 30 35 0 40 80 120 160 tamb (c) pd (w)
TDA7265SA 10/12 figure 22. clipwatt11 mechanical data & package dimensions outline and mechanical data 0044448 g dim. mm inch min. typ. max. min. typ. max. a3.20.126 b 1.05 0.041 c 0.15 0.006 d 1.5 0.059 e 0.49 0.55 0.019 0.002 f 0.77 0.8 0.88 0.030 0.031 0.035 f1 0.15 0.006 g 1.57 1.7 1.83 0.062 0.067 0.072 g1 16.87 17 17.13 0.664 0.669 0.674 h1 12 0.480 h2 18.6 0.732 h3 19.85 0.781 l 17.9 0.700 l1 14.55 0.580 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 clipwatt11 weight: 1.80gr
11/12 TDA7265SA table 6. revision history date revision description of changes september 2003 1 first issue july 2004 2 changing of the style-sheet. changed the maturity from product preview to final.
information furnished is believed to be accurate and reliable. however, stmicroelectronics assu mes 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 replac es 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 ? 2004 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 of america www.st.com 12/12 TDA7265SA

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