ics for audio common use 1 AN5276 5 w 2-ch (19v, 8 w ) power amplifier with variable audio output and volume control n overview the AN5276 is a monolithic integrated circuit designed for 5.0 w (19 v, 8 w ) output audio power amplifier. it is a dual channel sepp ic suitable for stereo operation in tv application. n features few external components : ? no boucherot cells(output c, r) ? no bootstrap capacitors ? no negative feeback capacitors built-in muting circuit built-in stand-by circuit built-in various protection circuits (load-short, thermal, over-voltage and current) high ripple rejection(55 db) compatible with an5275, an5277 operating voltage range 10 v to 24 v(19 v typ.) hsip012-p-0000a unit : mm 7.7 0.3 (12.5) 19.1 0.3 21.9 0.3 (1.2) (10.0) (10.0) 29.6 0.3 20.0 0.3 0.6 28.0 0.3 29.75 0.30 f 3.6 r1.8 0.6 (1.27) (1.27) (1.3) 12 1 +0.15 ?.05 2.54 0.25 1.45 0.15 1.80 0.15 1.2 0.1 3.5 0.3 +0.10 ?.05 n block diagram n.c. 1 ch.1 in 2 rf 3 gnd (input) 4 ch.2 in 5 n.c. 6 out ch.2 7 mute 8 gnd (output) 9 v cc 10 standby 11 out ch.1 12 att. con att. ripple filter protection circuit ? temperature ? over-voltage ? over-current ? load short n applications tv
2 AN5276 ics for audio common use n absolute maximum ratings parameter symbol rating unit supply voltage v cc 26.0 v supply current i cc 4.0 a power dissipation * 2 p d 37.5 w operating ambient temperature * 1 t opr - 25 to + 75 c storage temperature * 1 t stg - 55 to + 150 c n recommended operating range parameter symbol range unit supply voltage v cc 10.0 to 24.0 v note) * 1 : except these items, all other measurements are taken at t a = 25 c. * 2 :t a = 75 c. pin no. descriptions 7 ch.2 output 8 mute 9 output gnd 10 v cc 11 standby 12 ch.1 output pin no. descriptions 1n.c. 2 ch.1 input 3 ripple filter 4 input gnd 5 ch.2 input 6 n.c n pin descriptions
3 ics for audio common use AN5276 n electrical characteristics at v cc = 19 v, f = 1 khz, r l = 8 w , t a = 25 c parameter symbol conditions min typ max unit quiescent current i cq v in = 0 mv ? 35 70 ma output end noise voltage * 1 v no no input, r g = 10 k w? 0.22 0.4 mv voltage gain g v v in = 57 mv 32 34 36 db total harmonic distortion thd v in = 57 mv ? 0.2 0.4 % maximum output power p o v cc = 22 v, thd = 10 % 5.6 7.0 ? w maximum output power p o v cc = 19 v, thd = 10 % 4.0 5.0 ? w ripple rejection ratio * 1 rr v r = 1 v rms 45 55 ? db f r = 120 hz, r g = 10 k w channel balance cb v in = 57 mv - 1.0 0 1.0 db muting ratio mr v in = 57 mv 70 80 ? db muting control voltage v mute v in = 57 mv, mr 3 70 db 3.0 ?? v standby control voltage 'on' v std-on no input, i cc 0.1 ma ?? 5.0 v standby control voltage 'off' v std-off no input, i cc 3 17 ma 8.5 ?? v channel crosstalk ct v in = 57 mv, r g = 10 k w 50 60 ? db note) * 1 : for this measurement, use the 20 hz to 20 khz (12 db/oct) filter.
4 AN5276 ics for audio common use pin no. equivalent circuit description dc voltage (v) 1 ? not connected ? 2 ch.1 input 0 this is the amplifier input pin. 3 ripple filter v cc -1.5v be this is the pin to connect the positive terminal of a ripple filter capactior. 4 ? input gnd 0 input ground pin 5 ch.2 input ? this is the amplifier input pin. 6 ? not connected ? n terminal equivalent circuits 2 4 200 w 400 w 30 k w 10 3 4 30 k w 20 k w 15.7 k w 15 k w 5 4 200 w 400 w 30 k w
5 ics for audio common use AN5276 pin no. equivalent circuit description dc voltage (v) 7 ch.2 output v cc /2 ch.2 output pin 8 mute ? mute input pin. mute 'on' = 5 v mute 'off' = 0 v 9 ? output gnd 0 ch.1 & ch.2 output ground. 10 ? v cc 19 v(typ.) this is the power supply pin. n terminal equivalent circuits (continued) 10 7 9 v cc/2 30 k w 600 w pre amp. driver cct 10 8 4 3 k w 3 k w 10 k w 200 w
6 AN5276 ics for audio common use n terminal equivalent circuits (continued) pin no. equivalent circuit description dc voltage (v) 11 standby ? this is the standby control pin. 12 ch.1 output v cc /2 ch.1 output pin 10 11 4 5 k w 5 k w 3 k w 10 12 9 30 k w 600 w pre amp. driver cct
7 ics for audio common use AN5276 n application circuit example n usage notes 1) external heatsink is needed when used. external heatsink should be fixed to the chassis. 2) fin of the ic can be connected to gnd. 3) please prevent output to v cc short and output to gnd short. 4) the temperature protection circuit will operate at t j around 150 c. however, if temperature decreass, the protection circuit would automatically be deactivated and resume normal operation. n.c. 1 input gnd output gnd 4 6 n.c. 1 8 9 7 v cc v cc v in2 10 k w 8.2 k w sp 8 w 10 m f mute mute on mute off 1000 m f 100 m f 1000 m f 12 sp 8 w 1000 m f stb r.f. stb off 5 v stb on 8 5 1 m f v in1 10 k w 2 1 m f 11 stb off v cc stb on 0 v mute off 0 v mute on 5 v 5 v
8 AN5276 ics for audio common use n technical information p d ? t a curves of hsi p012-p-0000a 0 0 power dissipation p d (w) ambient temperature t a ( c) 25 50 75 100 125 150 10 20 30 40 50 60 70 80 20.8 w 62.5 w (1) (2) (3) (4) 15.6 w 3.0 w (1) t c = t a , 62.5 c/w( q j-c = 2 c/w) (2) 20.83 w( q f = 4.0 c/w) with a 100cm 2 3mm al heat sink (black colour coated) or a 200cm 2 2mm al heat sink (not lacquered) (3) 15.63 w( q f = 6.0 c/w) with a 100cm 2 2mm al heat sink (not lacquered) (4) 3.0 w at t a = 25 c( q j-a = 4 2 c/w) without heat sink p d ? t a
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