TDA7266M 7w mono bridge amplifier wide supply voltage range (3-18v) minimum external components C no swr capacitor C no bootstrap C no boucherot cells C internally fixed gain stand-by & mute functions short circuit protection thermal overload protection description the TDA7266M is a mono bridge amplifier spe- cially designed for tv and portable radio appli- cations. july 2002 ? 1 2 4 vref st-by 7 v cc 0.22 m f v cc 13 3 d98au831a + - - + out1+ out1- mute 6 8 9 s-gnd pw-gnd 470 m f 100nf block and application diagram multiwatt 15 ordering number: TDA7266M technology bi20ii 1/9
electrical characteristics (v cc = 11v, r l = 8 w , f = 1khz, t amb = 25 c unless otherwise specified.) symbol parameter test condition min. typ. max. unit v cc supply range 3 11 18 v i q total quiescent current 50 65 ma v os output offset voltage 120 mv p o output power thd = 10% 6.3 7 w thd total harmonic distortion p o = 1w 0.05 0.2 % p o = 0.1w to 2w f = 100hz to 15khz 1% svr supply voltage rejection f = 100hz vr = 0.5v 40 56 db a mute mute attenuation 60 80 db t w thermal threshold 150 c g v closed loop voltage gain 25 26 27 db r i input resistance 25 30 k w vt mute mute threshold for v cc > 6.4v; v o = -30db for v cc < 6.4v; v o = -30db 2.3 v cc /2 -1 2.9 v cc /2 -0.75 4.1 v cc /2 -0.5 v v 1 2 3 4 5 6 7 9 10 11 8 n.c. n.c. s-gnd pw-gnd st-by mute n.c. in1 v cc out1- out1+ 13 14 15 12 n.c. n.c. vcc n.c. d98au832 pin connection (top view) absolute maximum ratings symbol parameter value unit v s supply voltage 20 v i o output peak current (internally limited) 2 a p tot total power dissipation (t case = 70 c) 33 w t op operating temperature 0 to 70 c t stg , t j storage and junction temperature -40 to +150 c thermal data symbol description value unit r th j-case thermal resistance junction to case typ. 1.4 max. 2 c/w TDA7266M 2/9
1 2 4 vref st-by 7 in1 c1 0.22 m f v cc 13 3 d98au833a + - - + out1+ out1- mute 6 8 9 s-gnd pw-gnd c5 470 m f c6 100nf r1 10k c2 10 m f m p r2 10k c4 1 m f figure 1: microprocessor application electrical characteristics (continued) symbol parameter test condition min. typ. max. unit vt st-by st-by threshold 0.8 1.3 1.8 v i st-by st-by current v6 = gnd 100 m a e n total output noise voltage a curve f = 20hz to 20khz 150 m v application suggestion stand-by and mute functions (a) microprocessor application in order to avoid annoying "pop-noise" during turn-on/off transients, it is necessary to guaran- tee the right st-by and mute signals sequence. it is quite simple to obtain this function using a mi- croprocessor (fig. 1 and 2). at first st-by signal (from mp) goes high and the voltage 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 amplifier is switched-on and the external capacitors in series to the input terminals (c3, c5) start to charge. its necessary to mantain the mute signal low until the capacitors are fully charged, this 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 signals is suitable for a proper operation. TDA7266M 3/9
+v s (v) v in (mv) v st-by pin 7 i q (ma) st-by mute play mute st-by +18 1.8 0.8 v mute pin 6 4.1 2.3 off off d96au259 v out (v) 2.9 1.3 figure 2: microprocessor driving signals. (b) low cost application in low cost applications where the mp is not pre- sent, the suggested circuit is shown in fig.3. the st-by and mute terminals are tied together and they are connected to the supply line via an external voltage divider. the device is switched-on/off from the supply line and the external capacitor c4 is intended to delay the st-by and mute threshold exceeding, avoiding "popping" problems. TDA7266M 4/9
1 2 4 vref st-by 7 in1 c3 0.22 m f v cc 13 3 d98au834b + - - + out1+ out1- mute 6 8 9 s-gnd pw-gnd c1 470 m f c2 100nf r1 47k c4 10 m f r2 47k vs figure 3a: stand-alone low-cost application. figure 3b: pcb and component layout of the application circuit (fig. 1). dashed parts are not to be considered TDA7266M 5/9
0.010 0.1 1 10 0.1 1 10 vcc = 11 v rl = 8 ohm f = 15 khz f = 5 khz f = 1 khz pout (w) thd (%) figure 4: distortion vs output power 0.010 0.1 1 10 0.1 1 10 thd(%) vcc = 9v rl= 8 ohm f = 15khz f = 5 khz f = 1khz pout (w) figure 5: distortion vs output power 0.010 0.1 1 10 100 1k 10k 20k thd(%) vcc = 11 v rl = 8 ohm pout = 100mw pout = 2w frequency (hz) figure 6: distortion vs frequency -5.000 -4.000 -3.000 -2.000 -1.000 0.0 1.0000 2.0000 3.0000 4.0000 5.0000 10 100 1k 10k 100k level(dbr) vcc = 11v rl = 8 ohm pout = 1w frequency (hz) figure 7: gain vs frequency 0.0 2.0000 4.0000 6.0000 8.0000 10.000 12.000 14.000 16.000 18.000 20.000 2.000 4.000 6.000 8.000 10.00 12.00 14.00 16.00 18.00 po(w) vs(v) d = 10% d = 1% rl = 8 ohm f = 1khz figure 8: output power vs. supply voltage 00.511.522.533.544.555.566.577.58 0 0.5 1 1.5 2 2.5 3 3.5 4 0 10 20 30 40 50 60 70 80 pd (w) (%) pout(w) vcc = 11v rl = 8ohm f = 1khz pd figure 9: total power dissipation & efficiency vs. output power TDA7266M 6/9
11.522.533.544.5 5 0 10 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 attenuation (db) vpin.6(v) figure 10: mute attenuation vs. v pin.6 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 0 10 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 attenuation (db) vpin.7 (v) figure 11: stand-by attenuation vs vpin.7 345678910111213141516171 8 30 35 40 45 50 55 60 65 70 iq (ma) vsupply(v) figure 12: quiescent current vs. supply voltage TDA7266M 7/9
multiwatt15 v dim. mm inch min. typ. max. min. typ. max. a 5 0.197 b 2.65 0.104 c 1.6 0.063 d 1 0.039 e 0.49 0.55 0.019 0.022 f 0.66 0.75 0.026 0.030 g 1.02 1.27 1.52 0.040 0.050 0.060 g1 17.53 17.78 18.03 0.690 0.700 0.710 h1 19.6 0.772 h2 20.2 0.795 l 21.9 22.2 22.5 0.862 0.874 0.886 l1 21.7 22.1 22.5 0.854 0.870 0.886 l2 17.65 18.1 0.695 0.713 l3 17.25 17.5 17.75 0.679 0.689 0.699 l4 10.3 10.7 10.9 0.406 0.421 0.429 l7 2.65 2.9 0.104 0.114 m 4.25 4.55 4.85 0.167 0.179 0.191 m1 4.63 5.08 5.53 0.182 0.200 0.218 s 1.9 2.6 0.075 0.102 s1 1.9 2.6 0.075 0.102 dia1 3.65 3.85 0.144 0.152 outline and mechanical data TDA7266M 8/9
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