unisonic technologies co., ltd tda7266 linear integrated circuit www.unisonic.com.tw 1 of 8 copyright ? 2010 unisonic technologies co., ltd qw-r107-037,c 7+7w dual bridge amplifier ? description the utc tda7266 is a 7+7w dual bridge amplifier specially designed for tv and portable radio applications. ? features * wide supply voltage range (3 ~ 18v) * minimum external components * no swr capacitor * no bootstrap * no boucherot cells * internally fixed gain * stand-by & mute functions * short circuit protection * thermal overload protection hzip-15a hzip-15b hzip-15d ? ordering information ordering number lead free halogen free package packing tda7266l-j15-a-t tda7266g-j15-a-t hzip-15a tube tda7266l-j15-b-t TDA7266G-J15-B-T hzip-15b tube tda7266l-j15-d-t tda7266g-j15-d-t hzip-15d tube
tda7266 linear integrated circuit unisonic technologies co., ltd 2 of 8 www.unisonic.com.tw qw-r107-037,c ? pin configuration 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 out2+ out2- vcc in2 n.c. n.c. s-gnd pw-gnd stand-by(st-by) mute n.c. in1 vcc out1- out1+ 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 out2+ out2- vcc in2 n.c. n.c. s-gnd pw-gnd stand-by(st-by) mute n.c. in1 vcc out1- out1+ hzip-15a hzip-15b hzip-15d out 2+ out 2- v cc in 2 n.c. n.c. s-gnd pw-gnd stand-by(st-by) mute n.c. in 1 v cc out 1+ out 1- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
tda7266 linear integrated circuit unisonic technologies co., ltd 3 of 8 www.unisonic.com.tw qw-r107-037,c ? block diagram 470f 100nf vcc 13 3 1 2 15 14 out2- out2+ out1- out1+ pw-gnd mute in2 st-by in1 s-gnd v ref 7 4 9 12 6 8 - + + - - + + - 0.22f 0.22f
tda7266 linear integrated circuit unisonic technologies co., ltd 4 of 8 www.unisonic.com.tw qw-r107-037,c ? absolute maximum ratings parameter symbol ratings unit supply voltage v cc 20 v output peak current (internally limited) i out 2 a hzip-15a / hzip-15b 33 power dissipation (t c =70 c) hzip-15d p d 20 w junction temperature t j +125 c operating junction temperature t j 0 ~ +70 c storage temperature t stg -40 ~ +150 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? thermal data parameter symbol ratings unit hzip-15a / hzip-15b 1.4 junction to case hzip-15d jc 2.5 c /w ? electrical characteristics (v cc =11v, r l =8 ? , f=1khz, ta=25 c, unless otherwise specified) parameter symbol test conditions min typ max unit supply range v cc 3 11 18 v output offset voltage v o(off ) 120 mv total output noise voltage en a curve, f=20hz ~ 20khz 150 v total quiescent current i q 48 65 ma input resistance r in 25 30 k ? output power p out thd=10% 6.3 7 w p out =1w 0.05 0.2 % total harmonic distortion thd p out =0.1~2w, f=100hz~15khz 1 % crosstalk c t 46 60 db closed loop voltage gain gv 25 26 27 db voltage gain matching gv 0.5 db supply voltage rejection svr f=100hz, v r =0.5v 40 56 db thermal threshold tt 150 c mute function for v cc >6.4v, v out = -30db 2.3 2.9 4.1 v mute threshold vm thd for v cc <6.4v, v out = -30db v cc /2-1.0 v cc /2-0.75 v cc /2-0.5 v mute attenuation a mute 60 80 db stand by function stand-by threshold vt st-by 0.8 1.3 1.8 v stand-by current v6=gnd i st-by 100 a
tda7266 linear integrated circuit unisonic technologies co., ltd 5 of 8 www.unisonic.com.tw qw-r107-037,c ? application suggestion for microprocessor application in order to avoid annoying ?pop-noise? during turn-on/off tr ansients, it is necessary to guarantee the right st-by and mute signals sequence. it is quite simple to obtain this function using a microprocessor (fig 1 and fig 2). at first st-by signal (from mp) goes high and the voltag e across the st-by terminal (pin 7) starts to increase exponentially. the external rc network is intended to turn-on slowly the biasing circuits of the amplifier, this to avoid ?pop? and ?click? on the outputs. when this voltage reaches the st-by threshold level, the am plifier is switched-on and the external capacitors in series to the input terminals (c3, c5) start to charge. it?s necessary to maintain the mute signal low until the c apacitors are fully charged, th is to avoid that the device goes in play mode causing a loud ?pop noise? on the speakers. a delay of 100 ~ 200ms between st-by and mute si gnals is suitable for a proper operation. c5 470f c6 100nf vcc 13 3 1 2 15 14 out2- out2+ out1- out1+ pw-gnd mute in2 st-by in1 s-gnd 7 4 9 12 6 8 c1 0.22f r1 10k c2 10f c3 0.22f r2 10k c4 1f p tda7266 fig. 1 microprocessor application
tda7266 linear integrated circuit unisonic technologies co., ltd 6 of 8 www.unisonic.com.tw qw-r107-037,c ? application suggestion(cont.) +18 +vcc(v) v in (mv) 1.8 1.3 0.8 v mute pin 6 v st-by pin 7 4.1 2.9 2.3 i q (ma) v out (v) off st-by mute play mute st-by off fig 2 microprocessor driving signals
tda7266 linear integrated circuit unisonic technologies co., ltd 7 of 8 www.unisonic.com.tw qw-r107-037,c ? application suggestion(cont.) for low cost application in low cost applications where the mp is not pr esent, the suggested circuit is shown in fig 3. the st-by and mute terminals are tied together and they ar e connected to the supply line via an external voltage divider. the device is switched-on/off fr om the supply line and the external capacitor c4 is intended to delay the st-by and mute threshold exceeding, avoiding ?popping? problems. c1 470f c2 100nf vcc 13 3 1 2 15 14 out2- out2+ out1- out1+ pw-gnd mute in2 st-by in1 s-gnd 7 4 9 12 6 8 c3 0.22f c5 0.22f r1 47k r2 47k vcc c4 10f tda7266 fig 3 stand alone low cost application
tda7266 linear integrated circuit unisonic technologies co., ltd 8 of 8 www.unisonic.com.tw qw-r107-037,c ? typical characteristics frequency (hz) 10 gain vs frequency 5.0000 1k 2.0000 10k -5.000 0.0 level (dbr) 100k 4.0000 3.0000 1.0000 -1.000 -2.000 -3.000 -4.000 10 0 vcc=11v r i =8o p out =1w quiescent current vs supply voltage vsupply (v) 3 70 7 55 8 45 11 65 60 50 40 35 30 4 i q (ma) 5 6910 12 13 14 15 16 17 18 utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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