UTC8207 linear integrated circuit youwang electronics co.ltd 1 low frequency power amplifier UTC8207 is an audio power ic with built- i n two channels developed for portable radio cassette tape recorder with power on/off switch. b ecause of the parts reduction and siph (single inline package), space merit is remarkable. thermal shut down protection circuit is built in. feature ? high power: p out =2.5w (typ.) (v cc =9v, r l =4 ? , f=1khz, thd=10%) p out =4.6w (typ.) (v cc =12v, r l =4 ? , f=1khz, thd=10%) ? low popping noise at power on ? small quiescent current: iccq=21ma (typ.) (v cc =9v,v in =0) ? soft clip ? built-in thermal shut down protection circuit ? best for supply voltage 9v, 12v ? operation supply voltage range: v cc =6~15v sip12-h-2.54 ordering information part no. package UTC8207 sip12-h-2.54 block diagram 3 6 5 4 8 12 1 2 +- 7 8 11 10 +- bias circuit thermal shut down protection circuit 9 gnd b.s.2 r l c7 c5 100 f 0.15 f 1000 f 0.15 f c9 c8 1000 f r l c6 out-2 out-1 100 f c4 b.s.1 c10 1000 f v cc1 v cc2 sw1 c11 *2 in-1 *1 c in rf 1 c1 47 f 120 ripple 47 f c3 *1 c in in-2 rf 2 120 47 f c2 45 30k ch-1 45 nf 1 ch-1 30k 100 f nf 2 (*1): this ic can be used without coupling capacitor (c in ). if volume slide noise occurred by input offset voltage is undesirable, it needs to use the capacitor (c in ). (*2): the condenser between the pin and the gnd (c 11 ) is for reducing pop noise when the power on / off switch (sw1) is set to on/off.
UTC8207 linear integrated circuit youwang electronics co.ltd 2 absolute maximum ratings (t a =25 c) characteristics symbol value units supply voltage v cc 20 v output current (peak/ch) i o (peak) 2.5 a power dissipation p d 12.5 w operating temperature t opr -20~75 c storage temperature t stg -55~150 c electrical characteristics ( unless otherwise specified, v cc =9v, rl=4 ? ,r g =600 ? ,f=1khz,t a =25 c, r f =120 ? ) characteristics symbol test conditions min. typ. max. unit quiescent current i ccq v in =0 -- 21 45 ma p out (1) thd=10% 2.0 2.5 -- output power p out (2) thd=10%, v cc =12v -- 4.6 -- w total harmonic distortion thd pout=0.4w/ch -- 0.2 1.0 % g v(1) r f =120 ? ,v out =0.775vrms (0dbm) 43 45 47 voltage gain g v(2) r f =0, v out =0.775vrms (0dbm) -- 56.5 -- db input resistance r in -- -- 30 -- k ? output noise voltage v no r g =10k ? , bw=20hz~20khz -- 0.3 1.0 mvrms ripple rejection ratio r.r. r g =600 ? , fripple=100hz -- 52 -- db cross talk c.t. r g =600 ? ,amp.1 ? 2, v o =0.775vrms (0db), f=1khz -- 50 -- db input offset voltage v6, v7 -- -- 30 60 mv stand-by current i off sw1 off -- 1 -- a typical dc voltage of each terminal (v cc =9v,t a =25 c) terminalno123456789101112 dc voltage 8.7 4.5 vcc 5.0 0.7 0.03 0.03 0.7 gnd 4.5 8.7 v cc function description
UTC8207 linear integrated circuit youwang electronics co.ltd 3 1. adjustment of voltage gain the voltage gain g v is obtained as follows by r1, r2 and rf in fig.1. r1 + rf r2 + r1 + rf 20log = g v when r f =0, gv=56.5db (typ.) when r f =120 ? ,g v =45db (typ.) by increasing rf, reduction of gv is possible. however, since the feedback increase is liable to produce oscillation, it is recommended to use this at 40db or over. fig.1 6/7 5/8 2/10 +- input rf output amp r2 30k 45 r1 c nf 47 f 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 the ic. 3. input stage the input circuit of this ic is 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 7, max 60mv offset voltage is produced. application after checking volume slide noise is recommended. for cutting the volume slide noise, insert the input capacitor: cin in series to interrupt the dc component. fig.2 6/7 9 2/10 47 f 5/8 c in gnd input output 30k 45k q1 q2 q3 rf to bias to driver 30k 4. oscillation preventive measures for oscillation preventive capacitor c6 and c7 between the output terminal and gnd, it is recommended to
UTC8207 linear integrated circuit youwang electronics co.ltd 4 use polyester film capacitor having good characteristics for temperature and for high frequency. since the characteristics of the capacitor is liable to be influenced 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 remarkable influence on the oscillation, connect c10tov cc at the nearest possible position form power gnd. at using this application with the voltage 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 pin3. however, output power is changed by pin3 supply voltage when pin3 supply voltage is not same pin12 voltage, after referring to attached date, select pin3 supply voltage. 6.input voltage when the excessive signal is input, turning-up is produced in the clip waveform. the turning-up point is v in =300mvrms (typ.): v cc =9v, r l =4 ? , f=1khz: enough care must be taken for this phenomenon. 7. gnd line gnd pin is not separated for pre-gnd and for pw-gnd. that is liable to cause distortion and cross talk worse. before use this ic, please check it. electrical characteristics curve 80 60 40 20 0 0 4 8 12 16 20 12 10 8 6 4 2 i ccq, v2,v10-v cc quiescent current i ccq (ma) r l =4 v in =0 ta=25 c v2,v10 i ccq output voltage v2,v10(v) 80 60 40 20 0 30 100 300 1k 3k 30k gv-f voltagegaingv(db) 70 50 30 10 10k 100k v cc =9v r l =4 r nf =120 t a =25 c supply voltage v cc (v) frequency f (hz) (to be continued) (continued)
UTC8207 linear integrated circuit youwang electronics co.ltd 5 30 10 3 1 0.1 0.01 0.03 0.1 0.3 1 3 thd - p out total harmonic distortion thd (%) output power p out (w) 5 0.3 0.5 10 30 10 3 1 0.1 0.01 0.03 0.1 0.3 1 3 thd - p out total harmonic distortion thd (%) output power p out (w) 5 0.3 0.5 10 f=10khz 100hz 1khz v cc =9v r l =4 r nf =120 t a =25 v cc =12v r l =4 r nf =120 t a =25 f=10khz 100hz 1khz 30 10 3 1 0.1 0.01 0.03 0.1 0.3 1 3 thd -p out total harmonic distortion thd (%) output power p out (w) 5 0.3 0.5 10 0 -10 -40 -50 -80 30 100 300 1k 10k r.r. - f ripple rejection r.r (db) frequency f (hz) -30 -70 -60 30k r l =4 f=1khz r nf =120 t a =25 -20 3k v cc =9v r l =4 r nf =120 r g =620 v cc =6v 9 12 0 -10 -40 -50 -80 30 100 300 1k 10k c.t. - f cross talk c.t. (db) frequency f (hz) -30 -70 -60 30k -20 3k v cc =9v r l =4 r g =620 r nf =120 100k 0 -10 -40 -50 -80 30 100 300 1k 10k r.r. - r g ripple rejection ratio r.r (db) -30 -70 -60 30k -20 3k v cc =9v r l =4 f=100hz r nf =120 t a =25 100k signal source resistance rg (to be continued) (continued)
UTC8207 linear integrated circuit youwang electronics co.ltd 6 1.6 1.4 0.8 0.6 0 30 100 300 1k 10k v no -r g output noise voltage v no (mv rms) 1.0 0.2 0.4 30k 1.2 3k v cc =9v r l =4 r nf =120 bw=20~20khz ta=25 100k 0 -10 -40 -50 -80 30 100 300 1k 10k c.t. - r g crosstalkc.t.(db) -30 -70 -60 30k -20 3k v cc =9v r l =4 f=1khz r nf =120 t a =25 100k signal source resistance rg signal source resistance rg 12 10 6 0 02 468 12 i ccq2 ,v2,v10-v cc2 quiescent current i ccq2 (ma) supply voltage v cc2 (v) 8 2 4 14 30 10 3 1 0.1 0.01 0.03 0.1 0.3 1 3 thd -p out total harmonic distortion thd (%) output power p out (w) 5 0.3 0.5 10 v cc1 =12v r l =4 f=1khz r nf =120 t a =25 10 12 10 8 6 4 2 0 v cc1 =12v v in =0 t a =25 i ccq v2, v10 output voltage v2, v10 (v) v cc2 =5v 6 7 8 9 0.5 0.4 0.2 0 -40 -20 0 20 40 80 thd - t a total harmonic distortion thd (%) 0.3 0.1 100 60 50 40 20 0 -40 -20 0 20 40 80 i ccq2 ,v2,v10-t a quiescent current i ccq (ma) 30 10 60 10 8 6 4 0 ambient temperature t a v cc =9v r l =4 p out =0.4w f=1khz ambient temperature t a v cc =9v r l =4 v in =0 output voltage v 2 ,v 10 (v) 2 v2, v10 iccq (to be continued) (continued)
UTC8207 linear integrated circuit youwang electronics co.ltd 7 14 0 0 p d -t a allowable power dissipation p d (w) 5 4 2 0 0 1234 6 p d -p out power dissipation p d (w) 3 1 5 ambient temperature t a output voltage p out (w) r l =4 f=1khz 12 10 8 6 4 2 20 40 60 80 100 120 140 160 180 infnite heat sink 80cm2 x 2mm al heat sink 18cm2 x 2mm al heat sink no heat sink 7 v cc =12v 9 package outline sip12-h-2.54 unit: mm 0.5 0.2 8.5 0.3 12.5 0.3 15.0 0.3 3.2 0.2 28.0 0.2 0.83typ 2.54 0.5 0.1 5.5 0.3 29.6 0.3 30.2max 1 12 0.4 +0.1 -0.05 4.0 0.2
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