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unisonic technologies co., ltd tda2030a linear integrated circuit www.unisonic.com.tw 1 of 14 copyright ? 2007 unisonic technologies co., ltd qw-r107-005,c 18w hi-fi audio amplifier and 35w driver ? description the utc tda2030a is a monolithic ic intended for use as low frequency class ab amplifier. with vs=max=44v it is particularly suited for more reliable applications without regulated suppl y and for 35w driver circuits using low-cost complementary pairs. the utc tda2030a provides high output current and has very low harmonic and cross-over distortion. further the device incorporates a short circuit protection system comprising and arrangem ent for automatically limiting the dissipated power so as to keep the working point of the output transistors within their safe operating area. a conventional thermal shut-down system is also included. *pb-free plating product number: tda2030al ? ordering information ordering number normal lead free plating package packing tda2030a-ta5-t tda2030al-ta5-t to-220-5 tube TDA2030A-TB5-T tda2030al-tb5-t to-220b tube tda2030al-ta5-t (1)packing type (2)package type (3)lead plating (1) t: tube (2) ta5: to-220-5, tb5: to-220b (3) l: lead free plating, blank: pb/sn ? pin configuration pin no. pin name 1 non inverting input 2 inverting input 3 -v s 4 output 5 +v s
tda2030a linear integrated circuit unisonic technologies co., ltd 2 of 14 www.unisonic.com.tw qw-r107-005,c ? absolute maximum ratings (ta=25 c) parameter symbol ratings unit supply voltage vs 22 v input voltage v in vs v differential input voltage v i(diff) 15 v peak output current(i nternally limited) i out 3.5 a total power dissipation at tc=90 c p d 20 w junction temperature t j -40 ~ +150 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. ? electrical characteristics (refer to the test circuit, vs = 16v, ta=25 c) parameter symbol test conditions min typ max unit supply voltage vs 6 22 v quiescent drain current i q 50 80 ma input bias current i i(bias) 0.2 2 a input offset voltage v i(off) 2 20 mv input offset current i i(off) vs= 22v 20 200 na power bandwidth b w p out =15w,r l =4 ? 100 khz r l =4 ? 15 18 w r l =8 ? 10 12 w output power p out d=0.5%,gv=26db, f=40hz to 15khz vs=19v, r l =8 ? 13 16 w open loop voltage gain gvo 80 db closed loop voltage gain gvc f=1khz 25.5 26 26.5 db p out =0.1 to 14w, r l =4 ? f=40hz to 15khz 0.08 % p out =0.1 to 14w, r l =4 ? f=1khz 0.03 % distortion d p out =0.1 to 9w, r l =8 ? f=40hz to 15khz 0.5 % second order ccif intermodulation distortion d2 p out =4w, r l =4 ? f2-f1=1khz 0.03 % third order ccif intermodulation distortion d3 f1=14khz, f2=15khz 0.08 % slew rate sr 8 v/ sec p out =15w 106 db signal to noise ratio s/n r l =4 ? , rg=10k ? , b=curve a p out =1w 94 db input noise voltage en b=curve a b= 22hz to 22khz 2 3 10 v input noise current in b=curve a b= 22hz to 22khz 50 80 200 pa input resistance (pin 1) r in open loop, f=1khz 0.5 5 m ? supply voltage rejection svr r l =4 ? , gv=26db rg=22k ? , f=100hz 54 db thermal shut-down junction temperature t j 145 c
tda2030a linear integrated circuit unisonic technologies co., ltd 3 of 14 www.unisonic.com.tw qw-r107-005,c ? application circuit
tda2030a linear integrated circuit unisonic technologies co., ltd 4 of 14 www.unisonic.com.tw qw-r107-005,c ? test circuit utc tda2030a 1 2 3 5 4 v in +vs -vs c1 1 f c2 22 f c6 100 f c4 100nf c7 220nf c3 100nf c5 220 f d1 1n4001 d1 1n4001 r3 22k r1 13k r4 1 rl r3 680 ? single supply amplifier utc tda2030a 1 2 3 5 4 v in +vs 0.1 f 100k rl=4 4.7k 1n4001 2.2 f 100k 2.2 f 100k 22 f 220 f 2200 f 1n4001 r4 1 c7 220nf c r 100k
tda2030a linear integrated circuit unisonic technologies co., ltd 5 of 14 www.unisonic.com.tw qw-r107-005,c ? typical characteristics 10 2 10 3 10 4 10 5 10 6 10 7 10 1 -60 -20 20 60 100 140 phase gain gv(db) 180 90 0 phase open loop frequency response 24 28 32 36 40 44 24 4 8 12 16 20 rl=4 rl=8 gv=26db d=0.5% f=40 to 15khz output power vs. supply voltage total harmonic di stortion vs. output power two tone ccif intermodulation distortion 10 -1 10 0 10 1 10 2 10 -2 10 -2 10 -1 10 0 10 1 10 2 vs=38v rl=8 vs=32v rl=4 f=15khz f=1khz gv=26db 10 1 10 2 10 -2 10 -1 10 0 10 1 10 2 10 3 10 4 10 5 order (2f1-f2) order (2f2-f1) vs=32v po ut =4w rl=4 gv=26db large signal frequency response maximum allowable power dissipation vs. ambient temperture 10 1 10 2 10 3 10 4 30 5 10 15 20 25 vs=15v rl=4 vs=15v rl=8 -50 0 50 100 150 200 30 5 10 15 20 25 i n f i n i t e h e a t s i n k h e a t s i n k h a v i n g r t y = 2 5 c / w h e a t s i n k h a v i n g r t h = 4 c / w h e a t s i n k h a v i n g r t h = 8 c / w ambient temperture, ta ( ) maximum allowable power dissipation, p d (w) frequency (khz) vo(vp-p) output power , po ut (w) frequency (hz) supply voltage, vs (v) frequency (hz) output power, po ut (w) total harmonic distortion, d( % ) total harmonic distortion, d( % ) po ut (w)
tda2030a linear integrated circuit unisonic technologies co., ltd 6 of 14 www.unisonic.com.tw qw-r107-005,c utc tda2030a 1 2 3 5 4 v in +vs c3 0.22 f r3 56k rl=4 r4 3.3k 1n4001 c4 10 f r1 56k c1 0.22 f r2 56k c2 47 f c5 2200 f /40v c8 2200 f r6 1.5 c6 0.22 f r5 30k r7 1.5 1n4001 r8 1 c7 0.22 f fig. 1 single supply high power amplifier ? typical performance of the circuit of fig. 1 parameter symbol test conditions min typ max unit supply voltage vs 36 44 v quiescent drain current i q vs=36v 50 ma d=0.5%, rl=4 ? f=40hz to 15khz, vs=39v 35 d=0.5%, rl=4 ? f=40hz to 15khz, vs=36v 28 d=10%, f=1khz, rl=4 ? , vs=39v 44 output power p out d=10%,rl=4 ? f=1khz,vs=36v 35 w voltage gain gv f=1khz 19.5 20 20.5 db slew rate sr 8 v/ sec p out =20w, f=1khz 0.02 % total harmonic distortion d p out =20w, f=40hz to 15khz 0.05 % input sensitivity v in gv=20db, p out =20w, f=1khz, rl=4 ? 890 mv rl=4 ? , rg=10k ? b=curve a, p out =25w 108 signal to noise ratio s/n rl=4 ? , rg=10k ? b=curve a, p out =4w 100 db
tda2030a linear integrated circuit unisonic technologies co., ltd 7 of 14 www.unisonic.com.tw qw-r107-005,c ? typical characteristics(cont. ) 24 28 32 34 36 40 5 15 25 35 45 output power vs. supply voltage output power, po ut (w) supply voltage, vs (v) 10 -1 10 0 10 1 10 -2 10 -1 10 0 f=15khz f=1khz vs=36v rl=4 gv=20db total harmonic distortion, d (%) output power, po ut (w) total harmonic distortion vs. output power 100 250 400 550 700 0 5 10 15 20 gv=26db gv=20db input level, vi (mv) output power, p out (w) output power vs. input level 0 5 10 15 20 0 8 16 24 32 power dssipation, p d (w) complete amplifier utc tda2030 power dssipation vs. output power output power, po ut (w)
tda2030a linear integrated circuit unisonic technologies co., ltd 8 of 14 www.unisonic.com.tw qw-r107-005,c typical amplifier with split power supply bridge amplifier with split power supply (p out =34w, v s =16v, v s =-16v)
tda2030a linear integrated circuit unisonic technologies co., ltd 9 of 14 www.unisonic.com.tw qw-r107-005,c ? multiway speaker systems and active boxes multiway loudspeaker systems provide the best possi ble acoustic performance since each loudspeaker is specially designed and optimized to handle a limited rang e of frequencies. commonly, these loudspeaker systems divide the audio spectrum two or three bands. to maintain a flat frequency response over the hi-fi audio range the bands cobered by each loudspeaker must overlap slightly. imbalance between the loudspeakers produces unacceptable resu lts therefore it is important to ensure that each unit generates the correct amount of acoustic energy for its s egments of the audio spectrum. in this respect it is also important to know the energy distribution of the music sp ectrum to determine the cutoff frequencies of the crossover filters (see fig. 2). as an example, a 100w three-way system with crossover frequencies of 400hz and 3khz would require 50w for the woofer, 35w for the midrange unit and 15w for the tweeter. both active and passive filters can be used for crossove rs but active filters cost significantly less than a good passive filter using aircored inductors and non-electrolytic capacitors. in additi on active filters do not suffer from the typical defects of passive filters: --power less; --increased impedance seen by the loudspeaker (lower damping) --difficulty of precise design due to variable loudspeaker impedance. obviously, active crossovers can only be used if a power amplifier is provide for each drive unit. this makes it particularly interesting and economically sound to use monolithic power amplifiers. in some applications complex filters are not relay necessary and simple rc low-pass and high-pass networks (6db/octave) can be recommended. the result obtained are excellent because this is the best type of audio filter and t he only one free from phase and transient distortion. the rather poor out of ban d attenuation of single rc filter s means that the loudspeaker must operate linearly well beyond the crossover frequency to avoid distortion. a more effective solution is shown in fig. 3. the proposed circuit can realize combined power ampl ifiers and 12db/octave high-pass or low-pass filters. in proactive, at the input pins am plifier two equal and in-phase voltages ar e available, as required for the active filter operations. the impedance at the pin (-) is of the order of 100 ? , while that of the pin (+) is ve ry high, which is also what was wanted. the components values calculated for fc=900hz us ing a bessel 3rd sallen and key structure are: c1=c2=c3=22nf, r1=8.2k ? , r2=5.6k ? , r3=33k ? . using this type of crossover filter, a complete 3-way 60w active loudspeaker system is shown as below. it employs 2nd order buttherworth f ilter with the crossover frequencies equal to 300hz and 3khz. the midrange section consistors of two f ilters a high pass circuit followed by a low pass network. with vs=36v the output power delivered to the woofer is 25w at d=0.06% (30w at d=0.5%).t he power delivered to the midrange and
tda2030a linear integrated circuit unisonic technologies co., ltd 10 of 14 www.unisonic.com.tw qw-r107-005,c the tweeter can be optimized in the design phase taking in account the loudspeaker efficiency and impedance (rl=4 ? to 8 ? ). it is quite common that midrange and tweeter speaker s have an efficiency 3db higher than woofers. 3way 60w active loudspeaker system (vs=36v) 1 2 5 4 3 utc tda2030a 1 2 5 4 3 utc tda2030a 1 2 5 4 3 utc tda2030a 0.22 f 2200 f 18nf 33nf 100 f 0.22 f 1n4001 1 f 0.1 f 0.1 f 0.22 f vs+ 18nf 3.3nf 100 f 0.22 f 3.3nf 3.3nf 47 f 0.22 f 100 f 0.22 f 220 f 0.22 f 2200 f 1n4001 bd908 bd907 22k 1 4 1.5 1.5 3.3k 22k 22k 680 100 1 22k 22k 6.8k 3.3k 100 2.2k vs+ 1n4001 1n4001 1n4001 8 1 2.2k 12k 100 22k 8 22k 22k vs+ 100 f vs+ in woofer midrange tweeter high-pass 3khz high-pass 3khz band-pass 300hz to 3khz low-pass 300hz 1n4001 ? musical instruments amplifiers another important field of applicat ion for active system is music. in this area the use of several medium power amplifiers is more convenient than a single high power amplifier, and it is also more reliable. a typical example (see fig. 4) consist of four amplifiers each driving a low-cost, 12 inch loudspeaker. this application can supply 80 to 160w rms.
tda2030a linear integrated circuit unisonic technologies co., ltd 11 of 14 www.unisonic.com.tw qw-r107-005,c ? transient inter-modulation distortion(tim) transient inter-modulation distortion is an unfortu nate phenomena associated with negative-feedback amplifiers. when a feedback amplifier receives an input signal whic h rises very steeply, i. e. contains high-frequency components, the feedback can arrive too late so that th e amplifiers overloads and a burst of inter-modulation distortion will be produced as in fig.5. since transient s occur frequently in music this obviously a problem for the designed of audio amplifiers. unfortun ately, heavy negative feedback is frequenc y used to reduce the total harmonic distortion of an amplifier, which tends to aggrav ate the transient inter-modulation (tim situation.) 20 to 40w amplifier 20 to 40w amplifier 20 to 40w amplifier 20 to 40w amplifier pre amplifier power amplifier feedback path input v1 v2 v3 v4 |av4 output v1 v2 v3 v4 fig.4 high power active box for musical instrument fig.5 overshoot phenomenon in feedback amplifiers the best known method for the measurement of tim cons ists of feeding sine waves superimposed onto square wavers, into the amplifier under test. the output spectr um is then examined using a spectrum analyzer and compared to the input. this method suffers from serious di sadvantages: the accuracy is limited, the measurement is a tatter delicate operation and an expensiv e spectrum analyzer is essential. the "inverting-sawtooth" method of measurement is based on the response of an amplifier to a 20khz saw-tooth wave-form. the amplifier has no difficulty following the slow ra mp but it cannot follow the fast edge. the output will follow the upper line in fig. 6 cutting of the shade area and t hus increasing the mean level. if this output signal is filtered to remove the saw-tooth, direct voltage remains which indicates the amo unt of tim distortion, although it is difficult to measure because it is indist inguishable from the dc offset of the amplifier. this problem is neatly avoided in the is-tim method by periodically inverting the saw-toot h wave-form at a low audio frequency as shown in fig.7.in the case of the saw-tooth in fig. 8 t he mean level was increased by the tim di stortion, for a saw-tooth in the other direction the opposite is true. m2 m1 sr(v/ s) input signal filtered output siganal fig.6 20khz sawtooth waveform fig. 7 inverting sawtooth waveform
tda2030a linear integrated circuit unisonic technologies co., ltd 12 of 14 www.unisonic.com.tw qw-r107-005,c the result is an ac signal at the output whole peak-to-peak value is the tim voltage, which can be measured easily with an oscilloscope. if the peak-topeak value of the signal and the peak-to-peak of the inverting sawtooth are measured, the tim can be found very simply from: 100 * vsawtooth vout tim = tim(%) t im=0.1% tim =0 .0 1 % ti m =1 % sr(v/ 0 s) in fig.8 the experimental results ar e shown for the 30w amplifier using the utc tda2030a as a driver and a low-cost complementary pair. a simple rc filter on the input of the amplifier to limit the maximum signal slope(ss) is an effective way to reduce tim. the diagram of fig.9 can be used to find the slew-rat e(sr) required for a given output power or voltage and a tim design target. for example if an anti-tim filter with a cutoff at 30khz is used and the max. peak to peak output voltage is 20v then, referring to the diagram, a slew-rate of 6v/ s is necessary for 0.1% tim. as shown slew-rates of above 10v/ s do not contribute to a further reduction in tim. slew-rates of 100v/ s are not only useless but also a disadvantage in hi-fi audio amplifiers because they tend to turn the amplifier into a radio receiver.
tda2030a linear integrated circuit unisonic technologies co., ltd 13 of 14 www.unisonic.com.tw qw-r107-005,c ? power supply using monolithic audio amplifier with non regulated supply correctly. in any working case it must provide a supply voltage less than the maximum value fixed by the ic breakdown voltage. it is essential to take into account all the working cond itions, in particular mains fluctuations and supply voltage variations with and without load. the utc tda2030a (vsmax=44v) is particularly suitable for substitution of the standard ic power amplifiers(with vsmax=36v) for more reliable applications. an example, using a simple full-wave rectifier followed by a capacitor filter, is show n in the table and in the diagram of fig. 10. a regulated supply is not usually used for the powe r output stages because of it s dimensioning must be done taking into account the power to supply in signal peaks. they are not only a small pe rcentage of the total music signal, with consequently large overdimensioning of the circuit. even if with a regulated supply higher output power can be obt ained(vs is constant in all working conditions),the additional cost and power dissipation do not usually justify its use. using non-regulated supplies, there are fewer designee restriction. in fact, when signal peaks are present, the capacitor filter acts as a flywheel supplying the required energy. in average conditions, the continuous power supplied is lo wer. the music power/continuous power ratio is greater in case than for the case of regulated supplied, with space saving and cost reduction. 0 0.4 0.8 1.2 1.6 2.0 28 30 32 34 36 vo ut (v) io ut (a) fig. 10 dc characteristics of 50w non-regulated supply 3300 f 220v 0 2 4 ripple (vp-p) ripple vout vo ut dc output voltage(vo) mains(220v) secondary voltage io=0 io=0.1a io=1a +20% 28.8v 43.2v 42v 37.5v +15% 27.6v 41.4v 40.3v 35.8v +10% 26.4v 39.6v 38.5v 34.2v 24v 36.2v 35v 31v -10% 21.6v 32.4v 31.5v 27.8v -15% 20.4v 30.6v 29.8v 26v -20% 19.2v 28.8v 28v 24.3v
tda2030a linear integrated circuit unisonic technologies co., ltd 14 of 14 www.unisonic.com.tw qw-r107-005,c ? short circuit protection the utc tda2030a has an original circuit which limits th e current of the output transis tors. this function can be considered as being peak power limiti ng rather than simple current limiting. it reduces the possibi lity that the device gets damaged during an accidental short circuit from ac output to ground. ? thermal shut-down the presence of a thermal limiting circuit offers the following advantages: 1).an overload on the output (even if it is permanent ), or an above limit ambient temperature can be easily supported since the t j can not be higher than 150 c 2).the heatsink can have a smaller factor of safety co mpared with that of a congenital circuit, there is no possibility of device damage due to high junction temper ature increase up to 150c, the thermal shut-down simply reduces the power dissipat ion and the current consumption. ? application suggestion the recommended values of the components ar e those shown on application circuit of typical amplifier with split power supply . different values can be used. the following table can help the designer. component recommended value purpose larger than recommended value smaller than recommended value r1 22k ? closed loop gaon setting. increase of gain decrease of gain r2 680 ? closed loop gaon setting. decrease of gain increase of gain r3 22k ? non inverting input biasing increase of input impedance decrease of input impedance r4 1 ? frequency stability danger of oscillation at high frequencies with inductive loads. r5 3r2 upper frequency cutoff poor high frequencies attenuation danger of oscillation c1 1 f input dc decoupling increase of low frequencies cutoff c2 22 f inverting dc decoupling increase of low frequencies cutoff c3,c4 0.1 f supply voltage bypass danger of oscillation c5,c6 100 f supply voltage bypass danger of oscillation c7 0.22 f frequency stability larger bandwidth c8 1/(2 *b*r1) upper frequency cutoff smaller bandwidth larger bandwidth d1,d2 1n4001 to protect the device against output voltage spikes. 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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