unisonic technologies co., ltd ka8602 linear integrated circuit www.unisonic.com.tw 1 of 6 copyright ? 2012 unisonic technologies co., ltd qw-r107-043.d low voltage audio power amplifier ? description the utc ka8602 is the audio power amplifier available for low voltage. the utc ka8602 supplies differential outputs for maximizing output swing at low voltages. the utc ka8602 does not need coupling capacitors to t he speaker. the gain of this amplifier is controlled easily by two external resistors. ? features *wide operating supply voltage: v cc =2v~16v *low quiescent supply current( i cc =2.7ma, typ) *medium output power (p out =250mw at v cc =6v, r l =32ohm, thd=10% *load impedance range: 8~100ohm *mute function (i cc =65 a, typ) *minimum number of external parts required. *low distortion dip-8 sop-8 ? ordering information ordering number package packing lead free halogen free ka8602l-d08-t ka8602g-d08-t dip-8 tube ka8602l-s08-r ka8602g-s08-r sop-8 tape reel ka8602l-s08-t KA8602G-S08-T sop-8 tube
ka8602 linear integrated circuit unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r107-043.d ? pin configurations pin name description 1 input(+) analog ground for the amplifiers. a 1 f capacitor at this pin (with a 5 f capacitor at pin 8) provides 52db (typ) of power supply rejection. turn-on time of the circuit is affected by the capacitor on this pin. this pin can be used as an alternative input. 2 input(-) amplifier input. the input capacitor and resistor set low frequency roll-off and input impedance. the feedback resistor is connected bet ween this pin and output 1. 3 output 1 amplifier 1?s output. the dc level is about (v cc ~0.7v)/2. 4 v cc dc supply voltage is applied to this pin (v cc =2~16v). 5 gnd ground pin. 6 output 2 amplifier 2?s output. this signal is equal in amplitude, but 180 out of phase with that output 1, the dc level is about (v cc ~0.7v)/2. 7 mute this pin can be used to power down the ic to c onverse power, or for muting, or both. when at a logic ?low? (less than 0.8v), the ic is enabled for normal operation. when at a logic ?high? (2v to v cc ), the ic is disabled. if mute is open, that is equivalent to a logic ?low?. 8 ripple rejection a capacitor at this pin increase power supply re jection, and affects turn-on time. this pin can be left open if the capacitor at pin 1 is sufficient.
ka8602 linear integrated circuit unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r107-043.d ? block diagram 3 6 7 5 8 4 1 2 - + amp 1 - + amp 2 r r output 1 output 2 mute gnd ripplie rejection bias v cc non- inberting input inverting input
ka8602 linear integrated circuit unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r107-043.d ? absolute maximum ratings (t a =25 ) parameter symbol ratings unit supply voltage v cc -1~18 v output current i out +-250 ma maximum input, ripple rejection, mute pin voltage v i (max) -1~vcc+1 v applied output voltage( output pin when disabled) v out -1~vcc+1 v temperature junction t j -55 ~ +150 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? recommended operation conditions (t a =25 ) parameter symbol ratings unit supply voltage v cc 2~16 v voltage at mute v i ( mute ) 0~vcc v peak load current i l ( peak ) 200 ma load impedance z l 8~100 differential gain (5khz bandwidth) g v 0~46 db ambient temperature t a -20~+70 ? electrical characteristics (v cc =6v, t a =25 , unless otherwise specified) parameter symbol test conditions min typ max unit dc parameter operating current i c c v cc =3v, mute=0.8v 2.7 4 ma v cc =16v, mute=0.8v 3.3 5 ma v cc =3v, mute=2v 65 100 a output voltage v out v cc =3v, r l =16 , r1=75k 1 1.15 1.25 v v cc =6v, r l =16 , r1=75k 2.65 v v cc =12v, r l =16 , r1=75k 5.65 v output offset voltage v o ( off ) v cc =6v, r f =75k , r l =32 -30 0 30 mv output high level v oh 2v ka8602 linear integrated circuit unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r107-043.d ? application circuit speaker speaker 7 4 3 6 5 8 1 2 utc ka8602 vee (-1.0v ~ -8.0v) audio input 0.1 f speaker mute v cc (+1.0v ~ +8.0v) v cc 75k 3k 10k 20k 20k 4.7k
ka8602 linear integrated circuit unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r107-043.d utc assumes no responsib ility for equipment failures that result from using pr oducts at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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