unisonic technologies co., ltd pa6021 cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2008 unisonic technologies co., ltd qw-r502-257.a 2-w stereo audio power amplifier with advanced dc volume control ? description the pa6021 is a stereo audio power amplifier that drives 2 w/channel of continuous rms power into a 4- ? load when utilizing a heat sink. advanced dc volume control minimizes external components and allows btl (speaker) volume control and se (headphone) volume control. the 20-pin dip package allows for the use of a heatsink which provides higher output power. to ensure a smooth transition between active and shutdown modes, a fade mode ramps the volume up and down. ? features * 2 w into 4-w speakers with external heatsink * dc volume control with 2-db * steps from -40 db ~ 20 db * ? fade mode * ? -85-db mute mode * differential inputs * 1-a shutdown current (typical) * headphone mode dip-20 lead-free: pa6021l halogen-free: pa6021g ? ordering information ordering number normal lead free plating halogen free package packing PA6021-D20-T pa6021l-d20-t pa6021g-d20-t dip-20 tube
pa6021 cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-257.a ? pin configuration 9 8 7 6 5 4 3 2 1 18 17 16 14 15 13 12 11 10 19 20 pgnd r out- pv dd r in+ r in- v dd l in- li n+ pv dd l out- pgnd r out+ se/btl agnd fade shutdown nc l out+ bypass volume ? pin description pin # pin name i/o description 16 bypass i tap to voltage divider for internal midsupply bias generator used for analog reference 15 fade i places the amplifier in fade mode if a logic low is placed on this terminal; normal operation if logic high is placed on this terminal. 17 agnd analog power supply ground 7 l in- i left channel negative input for fully differential input. 8 l in+ i left channel positive input for fully differential input. 10 l out - o left channel negative audio output 12 l out+ o left channel positive audio output. 13 nc no connection 1,11 pgnd power ground 3,9 pv dd supply voltage terminal for power stage 5 r in- i right channel negative input for fully differential input. 4 r in+ i right channel positive input for fully differential input. 2 r out - o right channel negative audio output 20 r out+ o right channel positive audio output 19 se/ btl i output control. when this terminal is high, se outputs are selected. when this terminal is low, btl outputs are selected. 14 shutdow i places the amplifier in shutdown mode if a ttl logic low is placed on this terminal 6 v dd supply voltage terminal 18 volume i terminal for dc volume control. dc voltage range is 0 to v dd .
pa6021 cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-257.a ? absolute maximum rating parameter symbol ratings unit supply voltage, v dd , pv dd v ss -0.3v ~ 6v v input voltage, r in+ , r in- , l in+ ,l in- v in -0.3v ~ v dd +0.3v v junction temperature t j -40c ~ 150c operating temperature t opr -40c ~ 85c storage temperature range t stg -65c ~ 85c note: absolute maximum ratings are those values beyo nd which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? electrical characteristics (t a =25c, unless otherwise specified) parameter symbol conditions min typ max unit dc characteristics ( v dd =pv dd =5.5v ) supply voltage, v dd , pv dd v dd 4 5.5 v gain=0db, se/ btl=0v 30 dc differential output voltage v out(diff) gain=20db, se/ btl=0v 50 mv se/ btl , fade 0.8xv dd v high-level input voltage v ih shutdown 2 v se/ btl , fade 0.6xv dd v low-level input voltage v il shutdown 0.8 v high-level input current (se/ btl , fade , shutdown , volume | i ih | v in =v dd =pv dd 1 a low-level input current (se/ btl , fade , shutdown , volume | i il | v in =0v 1 a se/ btl =0v, shutdown=2v 6.0 7.5 9.0 supply current, no load i dd se/ btl =5.5v, shutdown=2v 3.0 5 6 ma supply current, shutdown mode i dd(sd) shutdown =0v 1 20 a ac characteristics ( v dd =pv dd =5v, r l =4 ? , gain=20db) bypass voltage (nominally v dd /2) v (bypass) measured at pin 16, no load, v dd =5.5v 2.65 2.75 2.85 v high-level output voltage v oh r l =8 ? , measured between output and v dd =5.5v 700 mv low-level output voltage v ol r l =8 ? , measured between output and gnd, v dd =5.5v 400 mv thd=1%, f=1khz 1.5 output power p out thd=10%, f=1khz 2 w total harmonic distortion + noise thd+n p out =1w, r l =8 ? , f=20hz~20khz <0.8% power supply rejection ratio psrr v dd =pv dd =4v~5.5v -42 -70 db input impedance z i volume=5v 14 k ? btl -82 db supply ripple rejection ratio rr f=1khz, gain=0db, c (byp) =0.47f se -57 db noise output voltage en f=20hz~20khz, gain=0db, c (byp) =0.47f btl 36 v rms shutdown=2v, r l =4 ? , supply current, max power into a 4- ? load i dd se/ btl=0v, p out =2w 1.3 a rms
pa6021 cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-257.a ? typical application circuit
pa6021 cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-257.a ? block diagram
pa6021 cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-257.a ? typical characteristics time (s) output waveform time (s) output waveform -2 01600 400 800 1200 2000 0 4 2 -4 -2 0 4 2 v dd =5v, r l =4 ? , thd=1% v rms =2.52v -4 v rms =2.54v 0 1600 400 800 1200 2000 -2 0 4 2 -4 -2 0 4 2 v dd =5v, r l =4 ? , thd=10% v rms =2.92v -4 v rms =2.95v time (s) output waveform 01600 400 800 1200 2000 -2 0 4 2 -4 -2 0 4 2 v dd =5v, r l =8 , p out =1w v rms =2.84v -4 v rms =2.87v utc assumes no responsibility for equipment failures that result from using products 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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