TDA7451 4x7w or 2x22w car radio power amplifier plus triple power supply preliminary data high output power capability: 4 x 9.5w or 2 x 32w/4 w max 4 x 8.5w or 2 x 28w/4 w eiaj 4 x 7w or 2 x 22w/4 w @14.4v, 1khz; 10% minimized external count - no need of decoupling capacitors - no need of bootstrap capacitor - no need of external compensation - internally fixed gain (20db) pop-free audio section st-by function (c-mos) mute function (c-mos) clip detector, thermal warning, short circuit detection built-in voltage regulators: - 5v @ 150ma with reset - 5v @ 500ma with st-by - 8.5v @ 200ma with st-by regulators diagnostic feature: un- dervoltage, 8.5v drop sense, short circuit, load dump, over-tempera- ture protections general: load dump overrating chip temperature audio section: out short (to gnd, to vs and across the load) power supply section: short circuit protection (out to gnd) this is preliminary information on a new product now in development or undergoing evaluation. details are subject to change without notice. october 1998 ? in rf v o3 v cc1 d95au311c + - + reset 10 m f + - + pw-gnd 1000 m f v cc2 0.1 m f v cc 200ma reg. - -+ rf rr - -+ lf lr hvcc hvcc st-by 1 m f mute 10k w in rr 0.1 m f 0.1 m f 500ma reg. 8.5v in lr in lf 0.1 m f 0.1 m f v o2 5v 150ma reg. 10 m f v o1 5v diag 470 m f stcap svr ddl s-gnd 10 m f 12 22 8 2 3 4 9 7 10 5 15 14 16 13 18,24 19 17 25 21 23 11 620 1 tab 47m f 22k 22k diag 10 m f 10k w block diagram flexiwatt25 ordering number: TDA7451 1/9
absolute maximum ratings symbol parameter value unit v s operating supply voltage 18 v v s dc supply voltage 28 v v s peak supply voltage (t = 50ms) 40 v i o audio output peak current (non repetitive t = 100 m s) 4 a audio output peak current (repetitive f > 10hz) 3 a i o voltage regulators output current internally limited p tot power dissipation at t case =85 c55w t stg ,t j storage and junction temperature range -40 to 150 c v out output voltages (diag, reset) 7 v v in input voltages (st-by, mute) 18 v resr output capacitor series resistance 0.2 to 10 w thermal data symbol parameter unit r th j-case thermal resistance junction-case 1.2 c/w d95au315 tab 1 25 reg3 reg2 reg1 st-cap vcc1 diag st-by reset svr in-rf in-rr sgnd in-lr in-lf ddl out-lf pwgnd out-lr vcc2 out-rr mute out-rf pwgnd hvcc pin connection TDA7451 2/9
in rf v o3 v cc1 d96au514 + reset 10 m f + pw-gnd 1000 m f v cc2 0.1 m f v cc - -+ rf rr - -+ lf lr hvcc st-by 1 m f mute 10 m f in rr 0.1 m f 0.1 m f 8.5v in lr in lf 0.1 m f 0.1 m f v o2 5v 10 m f v o1 5v diag 470 m f stcap svr ddl s-gnd 10 m f 12 22 8 2 3 4 9 7 10 5 15 14 16 13 18,24 19 17 25 21 23 11 620 1 tab 47m f 22k 22k 10k w 10k w p o = 4 x 7w s.e. application in r v o3 v cc1 d96au515 + reset 10 m f pw-gnd 1000 m f v cc2 0.1 m f v cc - out r - + out l st-by 1 m f mute 10 m f 0.22 m f 8.5v in l 0.22 m f v o2 5v 10 m f v o1 5v diag 470 m f stcap svr ddl s-gnd 10 m f 12 22 8 2 3 4 9 7 10 5 1514 1613 18,24 19 17 25 21 23 11 6 20 1 tab 47 m f 22k 22k 10k w 10k w p o = 2 x 22w btl application TDA7451 3/9
electrical characteristics (refer to the test circuit; v s = 14.4v; r l =4 w ,t amb =25 c, f = 1khz, unless otherwise specified) symbol parameter test condition min. typ. max. unit general i q total quiescent current i l01 ,i l02 ,i l03 = 5ma 80 150 ma v sb in st-by in threshold voltage 1.5 v v sb out st-by out threshold voltage 3.5 v i st-by stand-by current consumption i l01 = 2ma 0.5 ma audio section p o output power r l =4 w ; thd = 10% bridge single ended 19 6 22 7 w w p o eiaj eiaj output power (**) vs = 13.7v bridge single ended 26 7.5 28 8.5 w w p o max. max. output power (**) vs = 14.4v bridge single ended 30 8 32 9.5 w w d distortion r l =4 w ; single ended, p o = 0.1 to 3w bridge, p o = 0.1 to 8w 0.04 0.06 0.3 0.3 % % ct cross talk f = 1khz; r g =0 f = 10khz; r g =0 50 60 55 db db r in input impedance single ended bridge 70 35 100 50 130 65 k w k w g v voltage gain single ended bridge 19 25 20 26 21 27 db db g v voltage gain match. 1 db bw bandwidth -3db 100 khz e no output noise voltage (*) r g = 0; single ended 100 m v svr supply voltage rejection r g = 0; f = 100hz; single ended 48 55 db asb stand-by attenuation 90 100 db i pin 8 st-by pin current play mode; vpin8 = 5v -10 30 m a a m mute attenuation 80 90 db v min mute in threshold voltage 1.5 v v m out mute out threshold voltage 3.5 v i cd clipping detector current (pull up to 5v with 10k w ) cdoff: p omin = 3.5w 5 m a cdon: thd = 5% 50 190 280 m a power supply section v o1 output voltages i 01 = 5ma 4.85 5 5.15 v d v o1 load regulation 1 i 01 = 5 to 150ma 80 mv i lo1 current limit v 01 = 0v 250 350 600 ma d v o1 dropout voltages i 01 = 150ma 700 mv svr ripple rejection v ripple = 1vpp; i 01 = 50ma f = 100hz f = 10khz 60 50 db db d v o1 line regulation 1 v s = 8 to 18v; i o1 = 5ma 10 40 mv reset reset on low v reg1 reset on threshold 3.5 4.0 4.7 v reset off low v reg1 reset off threshold 4.25 v reset hyst reset threshold hysteresis vs reg 1 250 500 mv v out on reset reset output voltage reset activated r(reset to v reg1 ) 15k 1.5 v (*) 22hz to 22khz TDA7451 4/9
electrical characteristics (continued) symbol parameter test condition min. typ. max. unit diagnostic output diag on vs low vs diag. on threshold 7 7.5 8 v diag off vs low vs diag. off thrershold 7.6 v diag hyst vs low vs diag. hysteresis 100 150 mv diag dump diag. threshold vs overvoltage 20 21 22 v diag on drop v reg3 output voltage drop before diag. activation i o3 = 100ma 90 200 mv v out on diag diag. output voltage diag activated r (diag to v reg1 ) 15k 1.5 v v o2 output voltage 2 i o2 = 5ma 4.85 5 5.15 v d v o2 load regulation 2 i o2 = 5 to 500ma 100 mv i l02 current limit 2 v o2 = 0v 0.8 1 1.5 a d v o2 dropout voltage i o2 = 500ma 1 1.5 v svr ripple rejection v ripple = 1vpp; i 02 = 100ma f = 100hz f = 10khz 60 50 db db d v o2 line regulation v s = 8 to 18v, i o2 = 5ma 10 40 mv v o3 output voltage 3 i o3 = 5ma 8.25 8.5 8.75 v d v o3 load regulation 3 i o3 = 5 to 200ma 80 mv i l03 current limit 3 300 400 800 ma d v o3 dropout voltage i o3 = 200ma 1 v svr ripple rejection v ripple = 1vpp; i 03 = 100ma f = 100hz f = 10khz 60 50 db db d v o3 line regulation 3 v s = 11 to 18v, i o3 = 5ma 10 40 mv reg1 5v 150ma reg3 8.5v 200ma stcap out short out short en reg2 5v 500ma out short en + - + - 7.5v 21v hyst=0.1v dump tj>170 + - + - 2.8v 2.2v amplifiers overload amplifiers clipping en reference + - 4v hyst=0.5v drop sense out tj>150 vcc diag d96au504b stcap reg1 reset reg3 cd st-by reg2 diagnostic diagram TDA7451 5/9
7.6 vcc 4 vreg1 4.25 off on reset st-by 2.2 5v vreg2 8.5 vreg3 off diag on d96au505b 8.5 5 voltage supply section waveforms TDA7451 6/9
t t t mute pin voltage vs output waveform vpin 16 waveform short to gnd or to vs d96au516 clipping thermal proximity st-by pin voltage t audio section waveforms TDA7451 7/9
flexiwatt25 dim. mm inch min. typ. max. min. typ. max. a 4.45 4.65 0.175 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 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 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 21.57 21.97 22.37 0.849 0.865 0.880 l1 18.57 18.97 19.37 0.731 0.786 0.762 l2 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 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 r4 0.50 0.019 v2 20 v3 45 h3 r4 g g1 l2 h1 h f m1 l flex25 v3 o l3 h2 r3 n v2 r c b l1 m e d a outline and mechanical data TDA7451 8/9
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences 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 publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics ? 1998 stmicroelectronics printed in italy all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - france - germany - italy - japan - korea - malaysia - malta - mexico - morocco - the netherlands - singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a. http://www.st.com TDA7451 9/9
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