unisonic technologies co., ltd ta8227ap linear integrated circuit www.unisonic.com.tw 1 of 8 copyright ? 2009 unisonic technologies co., ltd qw-r107-021,d low frequency power amplifier ? description the utc ta8227ap is an audio power ic with built-in two channels developed for portable radio cassette tape recorder with power on / off switch. thermal shut down protection circuit is built in. ? features * wide operating supply voltage: v cc =5~12v * low popping noise at power on * best for supply voltage 9v * output power p out =2.5w/ch at vcc=9v, r l =4 , f=1khz, thd=10% p out =3.0w/ch at vcc=9v, r l =3 , f=1khz, thd=10% * soft clip * built-in thermal shut-down protection circuit * stand-by switch ? ordering information ordering number lead free plating halogen free package packing ta8227apl-d12-h-t ta8227apg-d12-h-t dip-12h tube ta8227apl-s20-r TA8227APG-S20-R sop-20 tape reel ta8227apl-s20-t ta8227apg-s20-t sop-20 tube
ta8227ap linear integrated circuit unisonic technologies co., ltd 2 of 10 www.unisonic.com.tw qw-r107-021,d ? pin configuration v cc2 out1 b.s.1 pre-gnd nf1 in1 v cc1 out2 b.s.2 ripple nf2 in2 1 2 3 4 5 6 7 11 12 8 9 10 v cc2 out1 b.s.1 pw-gnd pw-gnd pw-gnd pw-gnd pre-gnd nf1 in1 v cc1 out2 b.s.2 pw-gnd pw-gnd pw-gnd pw-gnd rirple nf2 in2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 for dip-12h for sop-20
ta8227ap linear integrated circuit unisonic technologies co., ltd 3 of 10 www.unisonic.com.tw qw-r107-021,d ? block diagram fin - + - + - - + - - - +
ta8227ap linear integrated circuit unisonic technologies co., ltd 4 of 10 www.unisonic.com.tw qw-r107-021,d ? absolute maximun ratings (ta=25 c) parameter symbol value unit supply voltage v cc 20 v output current (peak / ch) i o(peak) 2.5 a power dissipation p d 4.0 w operating temperature t opr -25~+75 c storage temperature t stg -55~+150 c ? electrical characteristics (ta=25 c, vcc=9v, r l =4 , r g =600 , f=1khz, unless otherwise specified) parameter symbol test conditions min typ max unit quiescent current i ccq v in =0 21 45 ma output power p out (1) p out (2) thd=10% thd=10%, rl=3 2.0 2.5 3.0 w total harmonic distortion thd p out =0.4w/ch 0.2 1.0 % gv1 rf=120 ,v out =0.775vrms (0 dbm) 43 45 47 db voltage gain gv2 rf=0, v out =0.775vrms (0 dbm) 56.5 db input impedance r in 30 k output noise voltage en rg=10k ,bw=20hz~20khz 0.3 1.0 mvrms ripple rejection ratio r.r. rg=600 , fripple=100hz -52 db cross talk c.t rg=600 ,v out =0.775vrms (0 dbm) -50 db input offset voltage v6, v7 30 60 mv standby current 1stb sw1:off 1 a ? typ. dc voltage of each terminal (vcc=9v, ta=25 c ) terminal no. 1 2 3 4 5 6 7 8 9 10 11 12 dc voltage (v) v cc 4.5 8.7 gnd 0.7 0.03 0.03 0.7 5.0 8.7 4.5 v cc ? application information and application method 1. adjustment of voltage gain the voltage gain gv is obtained as follows by r1, r2 and rf in fig.1 1 2 1 log 20 r r r r r g f f v + + + = when rf=0 gv=56.5 db (typ.) when rf=120 gv=45 db (typ.) by increasing rf, reduction of gv is possible. however, si nce the feedback increase is liabl e to produce oscillation, it is recommended to use this at 40db or over. r2 30k - + ch-2 r1 45 + - c nf 47 f r f input output fig.1 6/7 (10/11) 5/8 (9/12) 2/11 (2/19) ( ): for sop-20 package
ta8227ap linear integrated circuit unisonic technologies co., ltd 5 of 10 www.unisonic.com.tw qw-r107-021,d ? application information and application method(cont.) 2. thermal shut-down circuit the thermal shut-down circuit is built in for the purpose of preventing the destruction of ic due to the abnormal temperature rise when the heat radiation is insufficient. the operation temperature is set at radiation fin temperature 175 c (typ.) at this temperature or over the bias is interrupted to prevent the destruction of ic. 3. input stage the input circuit of this ic is as shown in fig.2. pnp tr : q1 is provided in the input circuit so as to make its usage possible without the input coupling capacitor. however, at pin 6 and pin 7, max 60mv offset voltage is produced. application after checking volume slide noise is recommended. for cutting the volume slide noise, insert the input ca pacitor: cin in series to interrupt the dc component. 2/11 (2/19) 4 (8) 5/8 (9/12) + - + - c in 30k output input 30k pre-gnd 45k to driver 47 f r f q1 q2 q3 ( ): for sop-20 package 6/7 (10/11) 4. oscillation preventive measures for oscillation preventive capacitor c6 and c7 between the output terminal and gnd, it is recommended to use polyester film capacitor having good characteri stics for temperature and for high frequency. since the characteristics of the capacitor is liable to be in fluenced by the temperature, use this capacitor after the temperature test to check the oscillation allowance. in addition, as the position of the electrolytic capacitor has a remarkable influence on the oscillation, connect c10 to vcc at the nearest possibl e position from power gnd. at using this application wth the volt age gain reduced, oscillation is liable to be produced. apply the capacitor after checking enough for its capacity, type and mounting position. 5. power on / off switch there is power on / off switch at pin1. however, output power is changed by pin1 supply voltage when pin1 supply voltage is not same pin12 supply voltage, after re ferring to attached date, select pin1 supply voltage. 6. input voltage when the excessive signal is input, turning-up is prod uced in the clip waveform. the turning-up point is v in =300mvrms (typ.) : v cc =9v, rl=4 , f=1khz : enough care must be taken for this phenomenon.
ta8227ap linear integrated circuit unisonic technologies co., ltd 6 of 10 www.unisonic.com.tw qw-r107-021,d ? test circuit fin - + - + - - + - - - + note 1: this ic can be used without coupling capacitor (c in ). if volume slide noise noise occurred by input offset voltage is undesirable, it needs to use the capacitor (c in ). note 2: the condenser between the pin4 and the gnd (c11) is for reducing pop noise when the power on / off switch (sw1) is se t to on / off.
ta8227ap linear integrated circuit unisonic technologies co., ltd 7 of 10 www.unisonic.com.tw qw-r107-021,d ? typical characteristics v cc1 =12v v in =0 ta=25c i ccq2 , v 2 , v 11 C v cc2 quiescent current, i ccq2 (ma) supply voltage, v cc2 (v) 12 10 8 6 4 2 0 024681012 14 i ccq v 2 , v 11 v cc1 =9v r l =4 ? f=1khz r nf =120 ? ta=25c thd C p out 30 10 5 3 1 0.5 0.1 0.3 0.01 0.03 0.1 0.3 1 3 10 v cc2 =5v 6v 7v 8v 9v output power, p out (w) 0.5 0.4 0.3 0.2 0.1 0 -40 -20 0 20 40 60 80 100 thd C ta total harmonic distortion, thd (%) ambient temperature, ta (c) i ccq2 , v 2 , v 11 C v cc2 quiescent current, i ccq (ma) 50 40 30 20 10 0 -40 -20 0 20 40 60 80 ambient temperature, ta (c) 60 40 20 0 80 5 0 10 20 15 i ccq v 2 , v 11 i ccq v out i ccq2 , v out C v cc supply voltage, v cc2 (v) quiescent current, i ccq (ma) 12 10 8 6 4 2 0 total harmonic distortion, thd (%) quiescent current, v 2, v 11 (v)
ta8227ap linear integrated circuit unisonic technologies co., ltd 8 of 10 www.unisonic.com.tw qw-r107-021,d ? typical characteristics(cont.) thd C p out thd C p out output power, p out (w) output power, p out (w) total harmonic distortion, thd (%) cross talk c.t. (db) total harmonic distortion, thd (%) signal source resistance rg ( ) 100 30 10 3 1 0.3 0.1 0.01 0.1 0.3 1 3 10 30 g v -f voltage gain, g v (db) 80 60 40 20 0 30 100 1k 10k 100k frequency, f (hz) frequency, f (hz) 30 100 1k 10k 100k 0 -20 -40 -60 -80 c.t. - f r.r. - rg 0 -20 -40 -60 -80 30 100 1k 10k 100k ripple rejection ratio, r.r. (db) v cc =9v r l =4 ? r nf =120 ? f=1khz r l =4 ? r nf =120 ? 100 30 10 3 1 0.3 0.1 0.01 0.1 0.3 1 3 10 v cc =9v r l =4 ? r nf =120 ? v cc =9v r l =4 ? rg=600 ? r nf =120 ? v out =0.775vrms (0dbm) v cc =9v r l =4 ? r nf =120 ? f=100hz f=10khz 1khz 100hz v cc =6v 9v
ta8227ap linear integrated circuit unisonic technologies co., ltd 9 of 10 www.unisonic.com.tw qw-r107-021,d ? typical characteristics(cont.) cross talk c.t. (db) output noise voltage vno (mvrms) v cc -p out supply voltage v cc (v) output power pout (w) 6 5 5 1 3 0111519 0 p d -p out output power pout (w) power dissipation p d (w) 5 1 4 1 3 0357 0 f = 1khz thd = 10% 4 2 7 9 13 17 r l = 6 8 4 v cc = 12v r l = 4 f = 1khz 9v 2 6 4 2 power dissipation p d (w)
ta8227ap linear integrated circuit unisonic technologies co., ltd 10 of 10 www.unisonic.com.tw qw-r107-021,d 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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