TBA820M 1.2w audio power amplifier TBA820M general description the TBA820M is a monolithic integrated circuit in 8 lead dual in-line plastic package. it is intended for use as low frequency class b power amplifier in portable cassette players and radios. fea t ures w i de rang e of sup p l y volta ge : vcc=3v~ 16v in portable ra dios, c a sset t e recorder s and playe r s etc. main features are : m i nim u m working suppl y voltage of 3v outline drawing low quiescent supply current ( icc=4m a , ty pical) good ripple rejection low num ber of external com ponents no crossover distortion low power dissipation output power : po=2w at 12v/8 ? , 1.6w at 9v/4 ? and 1.2w at 9v/8 ? b l o c k d i a g r a m p i n c o n n e c t i o n 8 7 6 5 4 3 2 1 - + ripple bootstrap vcc output gnd input nf cb 1 2 3 4 5 6 7 8 frequency gain setting input ground ripple bootstrap supply output tba 820m compensation voltage rejection tiger electronic co.,ltd
TBA820M absolute maximum ratings characteristics symbol value unit supply voltage vcc 16 v peak output current ipk 1.5 a power dissipation(at tamb=50 c) p d 1.25 w operating temperature topr -20~70 c storage temperature tstg -40~150 c thermal data characteristics symbol value unit thermal resistance junction-ambient rth(j-a) 100 c/w electrical characteristics ( unless otherwise specified vcc=9v,tamb=25 c) characteristic symbol test condition min. typ. max. unit supply voltage vcc 3 16 v quiescent output voltage(pin 5) vo 4 4.5 5 v quiescent drain current id 4 12 ma bias current (pin 3) ib 0.1 a vcc=12v;r l =8 ? 2 vcc=9v;r l =4 ? 1.6 vcc=9v;r l =8 ? 0.9 1.2 vcc=6v;r l =4 ? 0.75 vcc=3.5v;r l =4 ? 0.25 output power po thd=10% f=1khz rf=120? vcc=3v;r l =4 ? 0.2 w rf=33 ? 16 po=1.2w r l =8 ? f=1khz rf=120? 60 mv rf=33 ? 3.5 input sensitivity vi(rms) po=50mw r l =8 ? f=1khz rf=120? 12 mv input resistance(pin 3) ri f=1khz 5 m ? c b =680pf 25 to 7000 frequency response (-3db) b r l =8 ? rf=120? c5=1000 f c b =220pf 25 to 20000 hz
TBA820M electrical characteristivcs ( unless otherwise specified vcc=9v ,t am b=25 c) continue c h a r a c t e r i s t i c s y m bol t e st c o n d i t i o n min . t y p . m a x . unit rf=33 ? 0 . 8 d i s t o r t i o n t h d po=500 m w r l =8 ? f=1khz rf=120 ? 0 . 4 % v o ltage gain (open loop) gv r l =8 ? f=1khz 7 5 d b rf=33 ? 4 5 v o ltage gain (closed loop) gv r l =8 ? f=1khz rf=120 ? 3 4 db input noise v o ltage v n vcc=9v ,b(-3db)=25~20000hz 3 a input noise current i n vcc=9v ,b(-3db)=25~20000hz 0 . 4 n a r1=10k ? 8 0 signal to noise ratio (*) s+n/n po=1.2w r l =8 ? gv=34db r1=50k ? 7 0 db supply voltage rejection (test circuit of 2) svr r l =8 ? f(ripple)=100hz c6=47 f rf=120 ? 4 2 d b (*) b(-3db)=25~20000hz test circuit 1. cir c uit diagram w i th load connected to the supply voltage 1 8 2 3 4 5 6 7 cb r2 1 c5 220uf/15v c3 0.22uf rf c1 100uf/6v r1 10k c6 47uf/10v c4 0.1uf c2 100uf/15v vi vc c r l TBA820M
TBA820M 2. cir c uit diagram w i th load connected to gr ound 1 8 2 3 4 5 6 7 cb r2 1 c5 220uf/15v c3 0.22uf rf c1 100uf/6v r1 10k c6 47uf/10v c4 0.1uf c2 100uf/15v vi vcc r l tba 820m c7 100uf/15v r3 56 characteristics cur ves
TBA820M
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