TDA7490L 15w + 15w stereo class-d amplifier 28w mono in btl 15w + 15w output power: r l = 8 w /4 w; thd = 10% high efficiency wide supply voltage range (from 10 to 25v) split supply turn off/on pop free st-by and mute features short circuit protection across the load thermal overload protection externally sinchronizable bridge configuration description the TDA7490L is a dual audio class d amplifier assembled in flexiwatt 25 package; it is specially designed for high efficiency application mainly for tv and home stereo sets. march 2001 ? pwm-stage1 g=2.5 preamplifier1 integrator1 r21 4.7k c26 470pf c25 470pf r20 68k r17 52.3k c23 2200 m f c22 100nf c21 2200 m f r4 130k l1 30 m input1 osc c19 560pf c20 33nf c18 330pf c17 24pf c16 330pf r15 100 -v cc r14 22k r12 22k c10 220nf out1 pwm-stage2 l2 30 m out2 c29 220nf r13 10k c15 560pf r11 100 -v cc ext_ck g=2.5 preamplifier2 c8 470pf c9 470pf r6 68k r5 4.7k c14 33nf r9 52.3k +v cc -v cc +v cc +v cc -v cc c28 2200 m f c12 2200 m f c11 100nf c1 330nf c2 1nf stby mute r2 30k c27 2.2 m f r1 10k c3 100nf c4 100nf input2 c5 330nf c6 1nf -v cc -v cc d98au978a 79 14 2 4 6 10 12 13 16 1 25 18 19 17 20 24 22 21 23 15 8 11 3 5 integrator2 r3 10k c7 100nf r1 10k r 6.8 figure 1. test and application circuit. (stereo configuration) flexiwatt 25 ordering number: TDA7490L 1/9
pwm-stage pre + - - + 470pf 470pf r4 68k r5 52.3k l9 30 m input c23 235nf pwm-stage l10 30 m c26 470nf dumping (common mode) the lc filter is optimized for 8 w (<->lc filter for 4 w in single-ended) it hos to be changed for other loads c24 235nf c29 470nf r28 10 r27 10 r25 rload pre 470pf 470pf r61 68k r62 52.3k d99au1081 79 10 18 19 17 23 3 r63 4.7k int. int. c40 c60 c59 c41 figure 2. test and application circuit. (bridge configuration) absolute maximum ratings symbol parameter value unit v cc dc supply voltage (no signal) 30 v p tot power dissipation t case = 70c 35 w t stg , t j storage and junction temperature C40 to 150 c t op operating temperature range 0 to 70 c v 6,8,10,18 maximum voltage on pins # 6,8,10,18 referred to gnd 5v thermal data symbol parameter typ. max. unit r th j-case thermal resistance junction-case 1 c/w TDA7490L 2/9
d97au816b -v cc -v cc out1 +v cc boot1 stby-mute feed1 osc feed2 in1 t1 +5v gnd curref t2 -5v feed3 in2 feed4 n.c. boot2 +v cc out2 -v cc vreg 1 25 pin connection (top view) pin functions n. name function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 -v cc sign/sub -v ccpow1 out 1 +v ccpow1 boot1 stby-mute feed1 osc feed2 in1 t1 +5v gnd curref t2 -5v feed3 in2 feed4 nc boot2 +v ccpow2 out2 -v ccpow2 v reg negative signal/substrate supply negative power supply ch1 pwm output of ch1 positive power supply ch1 bootstrap ch1 control state pin feedback pin 1 ch1 master oscillator setting freequency pin (or external sync.) feedback pin2 ch1 input ch1 triangular waveform ch1 +5v regulator (only for internal purposes) signal ground setting current resistor triangular waveform ch2 -5v regulator (only for internal purposes) feedback pin1 ch2 input ch2 feedback pin2 ch2 not connected bootstrap ch2 positive power supply ch2 pwm output of ch2 negative power supply ch2 10v regulator TDA7490L 3/9
electrical characteristics (refer to the test circuit, v cc = 17v; rl = 8 w ; demod. filter l = 30mh, c = 220nf; f = 1khz; fsw = 200khz; tamb = 25?c unless otherwise specified.) symbol parameter test condition min. typ. max. unit v s supply range 10 25 v i q total quiescent current r l = no lc filter 70 120 ma v os output offset voltage C150 +150 mv p o output power thd = 10% thd = 1% 12 10 15 12 w w p o(btl) output power in bridge configuration vs = 17v; r l = 16 w thd = 10% thd = 1% 28 22.5 w w vs = 13v; r l = 8 w thd = 10% thd = 1% 28 22.5 w w p o (1) output power r l = 4 w v cc = 13v thd = 10% thd = 1% 15 12 w w p d maximum dissipated power v cc = 17v; r l = 8 w p o = 15w + 15w; thd = 10% 4w h efficiency (*) p o = 15w + 15w 86 % thd total harmonic distortion r l = 8 w ; p o = 1w 0.1 % i max overcurrent protection threshold r l = 0 3.5 5 a t j thermal shut-down junction temperature 150 c g v closed loop gain 29 30 31 db d g v (3) gain matching -1 +1 db e n total input noise r g = 50 w a curve f = 20hz to 22khz 7 12 m v m v c t cross talk f = 1khz, p o = 1w 55 db r i input resistance 20 30 k w svr supply voltage rejection f = 100hz; v r = 0.5 60 db v rmax overvoltage threshold (5) 55 60 v t r , t f rising and falling time 50 70 ns r dson power transistor on resistance 0.4 0.8 w f sw (4) switching frequency range 100 200 230 khz mute & stand-by functions v st-by stand-by range 0 0.7 v v mute mute range 1.7 2.5 v v play play range 4 5 v a mute mute attenuation 55 60 db i qst-by quiescent current @ stand-by 3 5 ma *: p o = measured across the load using the following inductor: coil58120 mppa 2 (magnectics) turns = 20 ? 1mm (1) l = 15 m h, c = 470nf (3) d gv is intended with r2, r17, r5, r9 1% precision (4) f sw = 0.25 (1/(300ns + r13 ( c17 + 76pf) 0.85) (5) v rmax = (+v cc ) - (-v cc ) when v r 3 v rmax the device goes in stand-by mode TDA7490L 4/9
figure 3. p.c. board and component layout of the figs. 1, 2. (for stereo and bridge compatible configuration) c o m p o n e n t s i d e s o l d e r s i d e TDA7490L 5/9
02468101214p o (w) 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 thd (%) d99au1086 stereo v s 17v; rl=8 w ; f=1khz figure 4. distortion vs. output power 02468101214p o (w) 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 thd (%) d99au1084 stereo v s 13v; rl=4 w ; f=1khz figure 5. distortion vs. output power 0.001 0.01 0.1 1 f(khz) 1 1 1 ct (db) -20 -30 -40 -50 -60 -70 -80 -90 -100 v s 17v; rl=8 w ; 0db=1w d99au1102 figure 6. crosstalk vs. frequency 0.01 0.1 1 10 f(khz) -14 -12 -10 -8 -6 -4 -2 0 2 amp (db) v s= 17v; rl= 8 w ; 0db= 1w d99au1103 figure 7. frequency response 02468101214p o (w) 0 1 2 3 4 5 6 7 p tot (w) d99au1087 v s= 17v; rl= 8 w ; f= 1khz figure 8. power dissipation vs. output power 0 5 10 15 20 25 p o (w) 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 thd (%) d99au1104 bridge v s 13v; rl=8 w ; f=1khz figure 9. distortion vs. output power in btl TDA7490L 6/9
0 5 10 15 20 25 p o (w) 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 thd (%) d99au1105 bridge v s 17v; rl=16 w ; f=1khz figure 10. distortion vs. output power in btl TDA7490L 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 TDA7490L 8/9
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsib ility 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 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 TDA7490L 9/9
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