TDA7384A 4 x 35w quad bridge car radio amplifier high output power capability: 4 x 40w/4 w max. 4 x 35w/4 w eiaj 4 x 25w/4 w @ 14.4v, 1khz, 10% 4 x 22w/4 w @ 13.2v, 1khz, 10% low distortion low output noise st-by function mute function automute at min. supply voltage de- tection low external component count: C internally fixed gain (26db) C no external compensation C no bootstrap capacitors protections: output short circuit to gnd, to v s , across the load very inductive loads overrating chip temperature with soft thermal limiter load dump voltage fortuitous open gnd reversed battery esd description the TDA7384A is a new technology class ab audio power amplifier in flexiwatt 25 package designed for high end car radio applications. thanks to the fully complementary pnp/npn out- put configuration the TDA7384A allows a rail to rail output voltage swing with no need of boot- strap capacitors. the extremely reduced compo- nents count allows very compact sets. march 2001 ? ordering number: TDA7384A in1 0.1 m f mute st-by in2 0.1 m f out1+ out1- out2+ out2- pw-gnd in3 0.1 m f in4 0.1 m f out3+ out3- out4+ out4- pw-gnd pw-gnd pw-gnd d99au1018 ac-gnd 0.47 m f47 m f svr tab s-gnd vcc1 vcc2 100nf 470 m f n.c. block and application diagram flexiwatt25 1/9
d94au159a tab p-gnd2 out2- st-by out2+ v cc out1- p-gnd1 out1+ svr in1 in2 s-gnd in4 in3 ac-gnd out3+ p-gnd3 out3- v cc out4+ mute out4- p-gnd4 hsd 1 25 pin connection (top view) absolute maximum ratings symbol parameter value unit v cc operating supply voltage 18 v v cc (dc) dc supply voltage 28 v v cc (pk) peak supply voltage (t = 50ms) 50 v i o output peak current: repetitive (duty cycle 10% at f = 10hz) non repetitive (t = 100 m s) 4.5 5.5 a a p tot power dissipation, (t case = 70 c) 80 w t j junction temperature 150 c t stg storage temperature C 55 to 150 c thermal data symbol parameter value unit r th j-case thermal resistance junction to case max. 1 c/w TDA7384A 2/9
electrical characteristics (v s = 14.4v; f = 1khz; r g = 600 w ; r l = 4 w ; t amb = 25 c; refer to the test and application diagram, unless otherwise specified.) symbol parameter test condition min. typ. max. unit i q1 quiescent current r l = 120 190 350 ma v os output offset voltage play mode 80 mv dv os during mute on/off output offset voltage 80 mv g v voltage gain 25 26 27 db dg v channel gain unbalance 1db p o output power v s = 13.2v; thd = 10% v s = 13.2v; thd = 0.8% v s = 14,4v; thd = 10% 20 15 24 22 17 26 w w w p o eiaj eiaj output power (*) vs = 13.7v 32 35 w p o max. output power (*) v s = 14.4v 38 40 w thd distortion p o = 4w 0.04 0.15 % e no output noise "a weighted" bw = 20hz to 20khz 50 70 70 100 m v m v svr supply voltage rejection f = 100hz; v r = 1vrms 50 65 db f ch high cut-off frequency p o = 0.5w 100 200 khz r i input impedance 70 100 k w c t cross talk f = 1khz p o = 4w f = 10khz p o = 4w 60 50 70 60 C C db db i sb st-by current consumption v st-by = 1.5v 50 m a i pin4 st-by pin current v st-by = 1.5v to 3.5v 10 m a v sb out st-by out threshold voltage (amp: on) 3.5 v v sb in st-by in threshold voltage (amp: off) 1.5 v a m mute attenuation p oref = 4w 80 90 db v m out mute out threshold voltage (amp: play) 3.5 v v m in mute in threshold voltage (amp: mute) 1.5 v v am in v s automute threshold (amp: mute) att 3 80db; p oref = 4w (amp: play) att < 0.1db; p o = 0.5w 7.6 6.5 8.5 v v i pin22 muting pin current v mute = 1.5v (sourced current) 51120 m a (*) saturated square wave output. TDA7384A 3/9
in1 0.1 m f c9 1 m f in2 c2 0.1 m f out1 out2 in3 c3 0.1 m f in4 c4 0.1 m f out3 out4 d95au335b c5 0.47 m f c6 47 m f svr tab vcc1-2 vcc3-4 c8 0.1 m f c7 2200 m f c10 1 m f st-by r1 10k r2 47k mute c1 14 15 12 11 22 4 13 s-gnd 16 10 25 1 hsd 620 9 8 7 5 2 3 17 18 19 21 24 23 figure 1: standard test and application circuit TDA7384A 4/9
figure 2: p.c.b. and component layout of the figure 1 (1:1 scale) components & top copper layer bottom copper layer TDA7384A 5/9
figure 3: quiescent current vs. supply voltage figure 4: quiescent output voltage vs. supply voltage figure 5: output power vs. supply voltage figure 6: distortion vs. output power figure 7: distortion vs. frequency figure 8: supply voltage rejection vs. frequency. v s =14.4v r l = 4 w p o = 1w TDA7384A 6/9
figure 9: output noise vs. source resistance figure 10: power dissipation & efficiency vs. output power application hints (ref. to the circuit of fig. 1) svr besides its contribution to the ripple rejection, the svr capacitor governs the turn on/off time se- quence and, consequently, plays an essential role in the pop optimization during on/off transients. to conveniently serve both needs, its minimum recommended value is 10 m f . input stage the TDA7384As inputs are ground-compatible and can stand very high input signals ( 8vpk) without any performances degradation. if the standard value for the input capacitors (0.1 m f) is adopted, the low frequency cut-off will amount to 16 hz. stand-by and muting stand-by and muting facilities are both cmos-compatible. if unused, a straight con- nection to vs of their respective pins would be ad- missible. conventional/low-power transistors can be employed to drive muting and stand-by pins in absence of true cmos ports or microprocessors. r-c cells have always to be used in order to smooth down the transitions for preventing any audible transient noises. since a dc current of about 10 ua normally flows out of pin 22, the maximum allowable muting-se- ries resistance (r 2 ) is 70k w , which is sufficiently high to permit a muting capacitor reasonably small (about 1 m f). if r 2 is higher than recommended, the involved risk will be that the voltage at pin 22 may rise to above the 1.5 v threshold voltage and the device will consequently fail to turn off when the mute line is brought down. about the stand-by, the time constant to be as- signed in order to obtain a virtually pop-free tran- sition has to be slower than 2.5v/ms. TDA7384A 7/9
flexiwatt25 dim. mm inch min. typ. max. min. typ. max. a 4.45 4.50 4.65 0.175 0.177 0.183 b 1.80 1.90 2.00 0.070 0.074 0.079 c 1.40 0.055 d 0.75 0.90 1.05 0.029 0.035 0.041 e 0.37 0.39 0.42 0.014 0.015 0.016 f (1) 0.57 0.022 g 0.80 1.00 1.20 0.031 0.040 0.047 g1 23.75 24.00 24.25 0.935 0.945 0.955 h (2) 28.90 29.23 29.30 1.138 1.150 1.153 h1 17.00 0.669 h2 12.80 0.503 h3 0.80 0.031 l (2) 22.07 22.47 22.87 0.869 0.884 0.904 l1 18.57 18.97 19.37 0.731 0.747 0.762 l2 (2) 15.50 15.70 15.90 0.610 0.618 0.626 l3 7.70 7.85 7.95 0.303 0.309 0.313 l4 5 0.197 l5 3.5 0.138 m 3.70 4.00 4.30 0.145 0.157 0.169 m1 3.60 4.00 4.40 0.142 0.157 0.173 n 2.20 0.086 o 2 0.079 r 1.70 0.067 r1 0.5 0.02 r2 0.3 0.12 r3 1.25 0.049 r4 0.50 0.019 v 5? (typ.) v1 3? (typ.) v2 20? (typ.) v3 45? (typ.) (1): dam-bar protusion not included (2): molding protusion included h3 r4 g v g1 l2 h1 h f m1 l flex25me v3 o l3 l4 h2 r3 n v2 r r2 r2 c b l1 m r1 l5 r1 r1 e d a v v1 v1 outline and mechanical data TDA7384A 8/9
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 ? 2001 stmicroelectronics C printed in italy C all rights reserved stmicroelectronics group of companies australia - brazil - china - finland - france - germany - hong kong - india - italy - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - u.s.a. http://www.st.com TDA7384A 9/9
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