KIA6282K 4.6w dual audio power amplifier general description d6282 is an audio po wer ic with b u ilt-in t w o channels d e veloped for portable radio cassette tap e reco rde r with power on/ o ff switch. th e r m a l shut down p r ot ection circuit i s buil t in. becau se o f th e part s redu ction and sip (sing l e in line package) , space m e rit is rem a rkable. fea t ures high power outline draw ing pout=2.5w/ch(t yp.) :(vcc=9v ,r l =4 ? ,f=1khz,thd=10%) pout=4.6w/ch(t y p .) :(vcc=12v ,r l =4 ? ,f=1khz,thd=10%) low popping noise at power on sm all quiescent current : i ccq =19m a(t y p.) (vcc=9v v i n=0) soft clip built-in therm a l shut down protection circuit best for supply voltage 9v , 12v operation supply voltage range : vcc=6~15v maximum ra tings (t a=25 c) c h a r a c t e r i s t i c s y m b o l ra t i n g u n i t supply v o ltage v c c 2 0 v output current (peak/ch) i q( p eak ) 2 . 5 a power dissipation p d 1 2 . 5 w operating t e m p erature t opr -20~75 c s t orage t e m p erature t s tg -55~150 c tiger electronic co.,ltd
d6282 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 (v) 8.2 4.5 vcc 8.9 0.6 0.01 0.01 0.6 gnd 4.5 8.2 vcc *3 pin is connected to vcc electrical characteristics (unless otherwise specified , vcc=9v,f=1khz, rg=600 ? , r l =4 ? ,ta=25c) characteristic symbol test condition min. typ. max. unit quiescent current i ccq v in =0 - 19 45 ma pout(1) thd=10% 2.0 2.5 - output power pout(2) thd=10%,vcc=12v - 4.6 - w total harmonic distortion thd pout=1w/ch - 0.25 1.0 % gv(1) rf=82 ? ,vout=0dbm 43 45 47 voltage gain gv(2) rf=0, vout=0dbm - 56 - db input resistance r in - - 30 - k ? output noise voltage v no rg=10k? , bw=20hz~20khz - 0.3 1.0 mvrms ripple rejection ratio r.r rg=600? , v rip =0.2vrms f rip =100hz - 54 - db cross talk c.t rg=600? .amp1 ? 2 vout=0dbm,f=1khz - 45 - db input offset voltage v6,v7 - - 20 60 mv
d6282 test circuit & block diagram 30 rf1 82 *c c1 47uf c4 100uf ch - 1 + - in 1 nf 1 r i pple c8 1000uf r l c6 0.15uf c3 220uf 20k 30 rf2 82 *c c2 47uf c5 100uf ch - 2 + - in 2 nf 2 c9 1000uf r l c7 0.15uf 20k c1 0 2200uf bi as ci rcui t therm a l shut dow n protecti on ci rcui t 5 12 1 2 4 3 7 8 9 6 11 10 b. s. 2 b. s. 1 vc c out - 2 out - 1 in - 1 in - 2 gnd in in v cc1 v cc2 * thi s ic c a n be used wit h out coupling capaci tor (c in),i f vol u m e sli d e n o i s e oc curr ed by input of fset voltage is undesirable, it needs to use the capacitor(cin). applica t ion informa t ion and applica t ion method 1. adjustment of vol t age gain the voltage gain gv i s obt ained as follows by r1,r2 and rf in fig.1. gv=20log((rf+r1+r2)/(rf+r1)) when rf=0 gv=56db(t y p .) when rf=82 ? gv=45db(t y p .) by increasing rf , reduction of gv i s p o s s i b l e , h o w e v e r , s i n c e t h e f e e d b a c k f i g 1 . r1 30 r2 20k r f input 6/7 5/8 + - am p 2/10 output 47uf c nf increa se i s liable to produce o s cillation , it is reco mm e nded to use thi s at 40db o r over .
d6282 2. thermal shut -dow n circuit the therm a l shut -d own ci rcui t is buil t in fo r the purpose of p r event i ng the dest ruction of ic due to the abn o rm a l te mperatu r e ri se when th e heat radi ation is insuf f ici e n t . the o p eration t e m p e r atu r e is set at radia tion fin t e m p eratu r e 175c(t y p.) at thi s t e m p eratu r e or over th e bias is i n terrupted to prevent the dest ruction of ic. 3. input st age the inpu t ci rcuit o f this ic is as sho w n in fig.2.pnp tr: q1 is prov i d ed in the input circuit so as to m a ke its usage. possible without t h e input couplin g capacito r . howeve r , at pins t an d ? ,m ax 60m v of fset voltage is produced. applicat ion aft e r checking vo lu m e slide noise is reco mm end e d. fo r cutting the v o l u m e s l i d e n o i s e , i n s e r t the input capacito r: c in i n s e r i e s t o interrupt the dc com ponent q2 q3 q1 20k 30 30 c r f 47uf 6/ 7 2/ 10 5/ 8 9 in p u t pr e - gnd to b i a s to d r iv e r output in 4. oscila tion preventive measures fig.2 fo r o s cill ation p r ev entive cap acitor c6 and c7 b e t w een the o u tput te rminal and gnd ,it is recomm end e d to use pol y ester fil m capacito r having go od characteristics for tem p erature and for high frequency . since the cha r acte r istic s o f t h e capaci t o r i s l i ab le to be i n fluenced by the te m p e r atu r e, use this capacitor afte r the t e m p e r atu r e test to ch eck the oscillation allowance. in addi ti on ,as th e posit ion of the e l ectro lytic capacito r has a re m a rkable influenc e on the osc illation ,co nnect c10 to vcc at the nea r est possibl e position from power gnd. at u s ing t h is application with t h e voltage gain reduced, oscil l at ion is liabl e to be produced ,appl y th e capacito r aft e r checking enou gh fo r it s capacit y ,ty p e and m ounting position.
d6282 as the o s cillat i on allowan ce varie s ac c o rding to t h e print e d pattern la yout, the standard printed board is recom m e nded to be referred to des ign it 5. input vol t age when the excessive signal is input, turning-up is produced in the clip waveform . the tu rnin g-up point is v in = 3 00m v r m s (t y p .) : v c c= 9 v , r l =4 ? ,f=1khz : enough care m u st be taken for this phenom enon. 6. pow e r on/off sw itch there is p o we r on/ o ff swi t ch at pin 3. however , ou tput power is ch anged by pin 3 suppl y voltage when pin 3 voltage i n not sa me pin 12 supply volt a ge, aft e r referring to attached date, select pin 3 supply voltage. 7. gnd line gnd p i n is not separated fo r pre-gnd an d for pw-gnd. that is liable t o cause distortion and cross talk worse. before use this ic, please check it. characteristics cur ves
d6282
d6282
|
