utc ta8207k linear integrated circuit utc unisonic technologies co., ltd. 1 qw-r107-013,a low frequency power amplifier description the utc ta8207k is an audio power ic with built-in two channels developed for portable radio cassette tape recorder with power on/off switch. because of the parts reduction and sip (single inline package), space merit is remarkable. thermal shut down protection circuit is built in. features *high power : p out =2.5w / ch ( typ.) (vcc=9v, rl=4 w , f=1khz, thd=10%) : p out =4.6w / ch ( typ.) (vcc=12v, rl=4 w , f=1khz, thd=10%) *low popping noise at power on *small quiescent current : i ccq =21ma ( typ.) (vcc=9v, vin=0) *soft clip *built-in thermal shut down protection circuit *bast for supply voltage 9v, 12v *operation supply voltage range : vcc=6-15v fsip-12h absolute maximum ratings ( ta=25 c) parameter symbol value unit supply voltage vcc 20 v output current (peak / ch) io(peak) 2.5 a power dissipation pd 12.5 w operating temperature topr -20 to + 75 c storage temperature tstg -55 to + 150 c
utc ta8207k linear integrated circuit utc unisonic technologies co., ltd. 2 qw-r107-013,a electrical characteristics (vcc=9v, r l =4 w , rg=600 w , f=1khz, ta=25 c, unless otherwise specified) parameter symbol test conditions min typ max unit quiescent current i ccq vin=0 21 45 ma output power p out(1) thd=10% 2.0 2.5 w p out(2) vcc=12v,thd=10% 4.6 w total harmonic distortion thd pout=0.4w / ch 0.2 1.0 % voltage gain gv(1) rf=120 w v out =0.775vrms 43 45 47 db gv(2) rf=0, v out =0.775vrms 56.5 db input resistance r in 30 k w output noise voltage vno rg=10k w bw=20hz ~ 20khz 0.3 1.0 mvrms ripple rejection ratio r.r. rg=600 w fripple=100hz 52 db cross talk c.t. rg=600 w , amp1<->2 vout=0dbm, f=1khz 50 db input offset voltage v6,v7 30 60 mv stand-by current sw1->off 1 m a typical 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 8.7 4.5 vcc 5.0 0.7 0.03 0.03 0.7 gnd 4.5 8.7 vcc
utc ta8207k linear integrated circuit utc unisonic technologies co., ltd. 3 qw-r107-013,a test circuit remark 1 : this ic can be used without coupling capacitor ( cin). if volume slide noise occurred by input offset voltage is undesirable, it needs to use the capacitor ( cin). remark 2 : the condenser between the pin3 and the gnd (c11) is for reducing pop noise when the power on/off switch (sw1) is set to on/off.
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