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unisonic technologies co.,ltd pa4835 cmos ic www.unisonic.com.tw 1 of 15 copyright ? 2008 unisonic technologies co.,ltd qw-r502-024-c stereo 2.8w audio power amplifier with dc volume control and selectable gain ? description the utc pa4835 is a monolithic integrated circuit and designed to provide dc volume control , and a stereo bridged audio power amplifiers capable of producing 2.8w into 3 ? at 10% thd+n and 2.2w into 3 ? at 1.0% thd+n.. utc pa4835 incorporated a dc volume control, stereo bridge-tied and single-ended audio power amplifiers, stereo docking outputs, and a selectable gain control, makes it optimally suitable for not ebook pc, multimedia monitors, and other portable applications. ? features *operating voltage : 3.3v ~ 5v *stereo switchable bridged/single-ended power amplifiers *dc volume control interface , 0db ~ -105db *low supply current (13ma at stereo btl) *low shutdown current(0.7 a, typ) *bridge-tied load (btl) or single-ended-(se) modes operation *output power at 1% thd+n , v dd =5v -2.2w/ch (typ) into a 3 load -2.0w/ch (typ) into a 4 load -1.2w/ch (typ) into a 8 load *output power at 10% thd+n , v dd =5v -2.8w/ch (typ) into a 3 load -2.3w/ch (typ) into a 4 load -1.5w/ch (typ) into a 8 load *single-ended mode: - 1.0% thd+n at 95mw/ch (typ) into 32 *system beep detect *thermal shutdown protection circuitry *high supply voltage ripple rejection *low crossover distortion lead-free: pa4835l halogen-free: pa4835g ? ordering information ordering number normal lead free halogen free package packing PA4835-P28-R pa4835l-p28-r pa4835g-p28-r tssop-28 tape reel pa4835-p28-t pa4835l-p28-t pa4835g-p28-t tssop-28 tube pa4835-n28-r pa4835l-n28-r pa4835g-n28-r htssop-28 tape reel pa4835-n28-t pa4835l-n28-t pa4835g-n28-t htssop-28 tube
pa4835 cmos ic unisonic technologies co., ltd 2 of 15 www.unisonic.com.tw qw-r502-024-c ? ordering information(cont.) ? pin configuration 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 gnd shutdown gain select mode mute v dd dc vol gnd right dock right in beep in left in left dock gnd right out+ v dd right out- right gain 2 right gain 1 gnd bypass hp sense gnd left gain 1 left gain 2 left out- v dd left out+ ? pin description pin no. pin name i/o description 1,8,14,20,23 gnd ground conne ction for circuitry. 2 shutdown i shutdown mode control signal input, place entire ic in shutdown mode when held high, i dd =0.7 a 3 gain select i gain select input pin 4 mode i mode select input pin 5 mute i mute control input pin 6,16,27 v dd supply voltage input pin 7 dc vol i volume control function input pin 9 right dock o right docking output pin 10 right in i right channel audio input pin 11 beep in i beep signal input pin 12 left in i left channel audio input pin 13 left dock o right docking output pin 15 left out + o left channel positive output pin 17 left out - o left channel negative output pin 18 left gain 2 connect pin 2 of the exter nal gain setting resistor for left channel 19 left gain 1 connect pin 1 of the exter nal gain setting resistor for left channel 21 hp sense i headphone sense control pin 22 bypass bypass pin 24 right gain 1 connect pin 1 of the exter nal gain setting resistor for right channel 25 right gain 2 connect pin 2 of the exter nal gain setting resistor for right channel 26 right out - o right channel negative output pin 28 right out + o right ch annel positive output pin
pa4835 cmos ic unisonic technologies co., ltd 3 of 15 www.unisonic.com.tw qw-r502-024-c ? block diagram
pa4835 cmos ic unisonic technologies co., ltd 4 of 15 www.unisonic.com.tw qw-r502-024-c ? absolute maximum ratings parameter symbol ratings unit supply voltage v dd 6 v operating ambient temperature t opr 0 ~ +70 junction temperature t j +125 storage temperature t stg -40 ~ +150 note: 1.absolute maximum ratings are stress ratings only and functional device operat ion is not implied. the device could be damaged beyond absolute maximum ratings. 2.the device is guaranteed to meet performance specifications within 0 ~70 operating temperature range and assured by design from ?20 ~85 . ? thermal characteristics parameter symbol ratings unit tssop-28 ja jc 105 15 thermal resistance htssop-28 ja jc 93 10 /w note: the ja of htssop-28 is given that exposed die attach pad is not soldered on pcb. ? electrical characteristics (v dd =5v, t a =25 , unless otherwise specified.) parameter symbol test conditions min typ max unit entire ic supply voltage v dd 3.3 5.5 v se/btl high input voltage v ih 4 v se/btl low input voltage v il 0.8v quiescent power supply current i dd v in =0v, i o =0a 13 25 ma shutdown current i shd v pin 2 = v dd 0.7 2.0 a volume attenuators gain with v pin 7 =5v 0.5 db attenuator range c range attenuation with v pin 7 =0v -90 -105 db v pin 5 =5v, btl mode -88 db mute attenuation a m v pin 5 =5v, se mode -88 db btl mode operation output offset voltage v os v in =0v 5 mv output noise voltage v n r l =8 ? , a-wtd filter 30 v thd=1%,f =1khz r l =3 ? r l =4 ? r l =8 ? 2.2 2.0 1.2 output power thd=10%,f =1khz p o r l =8 ? 1.5 w total harmonic distortion + noise thd+n a vd =2, 20hz < f <20khz r l =4 ? , p o =1w r l =8 ? , p o =1w r l =32 ? , p o =340mw 0.2 0.15 0.1 % power supply rejection ratio rsrr v ripple =200mv rms , r l =8 ? c b =2.2 f, f =120hz 74 db channel separation x talk f =1khz , c b =2.2 f 95 db signal-to-noise ratio snr v dd =5v, p o =1.1w, r l =8 ? a-wtd filter 95 db
pa4835 cmos ic unisonic technologies co., ltd 5 of 15 www.unisonic.com.tw qw-r502-024-c ? electrical characteristics(cont.) se mode operation output offset voltage v os v in =0v 5 mv output noise voltage v n r l =1k ? , a -wtd filter 40 v output power p o thd=1%, f =1khz, r l =32 ? thd=10%, f =1khz, r l =32 ? 95 100 mw a v = 1, v out =1v rms , f =1khz r l =1k 0.01 total harmonic distortion plus noise thd+n p o =75mw, r l =32 ? , a v = 1 f =1khz 0.005 % power supply rejection ratio psrr v ripple =200mv rms , f =120hz c b =2.2 f 58 db channel separation x talk f =1khz , c b =2.2 f 95 db signal-to-noise ratio snr p o =75mw,r l =32 ? ,a -wtd filter 102 db ? truth table for logic inputs mute mode hp sense dc vol contro l bridged output single-ended 0 0 0 fixed level vol.fixed 0 0 1 fixed level muted vol.fixed 0 1 0 adjusted vol.changed 0 1 1 adjusted muted vol.changed 1 x x muted muted
pa4835 cmos ic unisonic technologies co., ltd 6 of 15 www.unisonic.com.tw qw-r502-024-c ? typical application circuit volume control 32 steps internal gain select mode control mode mute hp sense dc vol control left dock beep in right in right dock 20k v dd gnd bypass beep detect power management click and pop suppression circuitry - + bias - + - + - + - + - + - left out + left out + right out - right out 3 v dd v dd 7 19 18 17 15 28 26 + headphone jack tip sleeve control pin pin ring to hp sense circuit + 25 24 shutdown 2.2 f 1,8,14,20,23 21 5 4 6,16,27 to control pin on headphone jack v dd + 13 12 11 10 9 right audio input 22 2 0.1 f 0.1 f 0.1 f 0.33 f 20k 200 k 0.33 f 20k 200k 20k 100k 100k 1 f 20k 20k 10k 10k 20k 0.068 f 20k 20k 20k 20k 10k 10k 20k 20k 0. 068 f 20k 220 f 1k 220 f 1k r_var left in +
pa4835 cmos ic unisonic technologies co., ltd 7 of 15 www.unisonic.com.tw qw-r502-024-c ? typical characteristics for v dd =5v, thd+n vs frequency total harmonic distortion +noise, thd+n (%) total harmonic distortion +noise, thd+n (%) total harmonic distortion +noise, thd+n (%) 20 50 100 200 500 1k 2k 5k 10k 20k 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 frequency (hz) av=4 av= 2 av=8 v dd =5 v r l =16 po=0.5w btl 20 50 100 200 500 1k 2k 5k 10k 20k 0.01 0.02 0.05 0.1 0.5 0.2 1 2 5 10 frequency (hz) av= 4 av=1 av= 2 v dd =5 v r l =8 po=0.25w se 20 50 100 200 500 1k 2k 5k 10k 20k 0.02 0.05 0.1 0.02 0.5 1 2 5 10 total harmonic ditortion +noise, thd+n (%) 0.005 0.002 0.001 av=4 av= 1 0.01 v dd =5 v r l =32 po=75mw se av= 2 frequency (hz)
pa4835 cmos ic unisonic technologies co., ltd 8 of 15 www.unisonic.com.tw qw-r502-024-c ? typical characteristics(cont.) 20 50 100 200 500 1k 2k 5k 10k 20k 0.01 0.02 0.05 0.1 0.5 1 2 5 10 frequency (hz) 0.005 0.002 0.001 av= 4 av= 2 av= 1 v dd =5 v r l =20k vin=1vrms se for v dd =3v, thd+n vs frequency total harmonic distortion +noise, thd+n (%) total harmonic distortion +noise, thd+n (%) 20 50 100 200 500 1k 2k 5k 10k 20k 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 total harmonic distortion+noise, thd+n (%) frequency (hz) av= 4 av=1 av=2 v dd =3.3 v r l =8 po=100mw se frequency (hz) 20k av=1 av=4 av=2 10k 5k 2k 1k 500 200 100 50 20 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 v dd =3.3v r l =32 p o =35mw se
pa4835 cmos ic unisonic technologies co., ltd 9 of 15 www.unisonic.com.tw qw-r502-024-c ? typical characteristics(cont.) total harmonic distortion +noise, thd+n (%) 20 50 100 200 500 1k 2k 5k 10k 20k frequency (hz) no filter a_wtd filter 100 50 20 10 5 2 1 v dd =5v r l =8 a v =2v/v btl 20 50 100 200 500 1k 2k 5k 10k 20k frequency (hz) no filter a_wtd filter 100 50 20 10 5 2 1 v dd =5v r l =10k a v =1v/ v se 20 50 100 200 500 1k 2k 5k 10k 20k -120 crosstalk (db) frequency (hz) -100 -80 -60 -40 -20 0 f=20khz f=1khz v dd =5v r l =8 po=1w a v =2v/ v btl 20 50 100 200 500 1k 2k 5k 10k 20k -120 crosstalk (db) frequency (hz) -100 -80 -60 -40 -20 0 f=20khz f=1khz v dd =5v r l =32 po=75mw a v =1v/ v se 20 50 100 200 500 1k 2k 5k 10k 20k 0 gain (dbv) frequency (hz) 2 4 6 8 10 12 v dd =5v r l =8 a v =2v/ v btl c f =0.1 f c f =0.22 f c f =0.068 f
pa4835 cmos ic unisonic technologies co., ltd 10 of 15 www.unisonic.com.tw qw-r502-024-c ? typical characteristics(cont.) 20 50 100 200 500 1k 2k 5k 20k -80 prss (dbga) -70 -50 -60 -40 -10 0 frequency (hz) -30 -20 r l =8 vin=200mvp cb=2.2 f se/btl v dd =5v total harmonic distortion +noise, thd+n (%) 100m 1 2 3 0.01 0.02 0.1 0.05 0.2 0.5 1 2 5 10 output power (w) 200m 500m 300m 800m f=20khz f=1khz f=20hz v dd =5 v r l =4 btl total harmonic distortion +noise, thd+n (%) 10m 20m 50m 100m 1 2 0.01 0.02 0.05 0.1 0.2 1 0.5 2 5 10 output power (w) 200m 500m f=20khz f=1khz f=20hz v dd =5v r l =8 btl 10m 20m 50m 100m 1 0.01 0.02 0.05 0.1 0.2 0.5 2 5 10 total harmonic distortion +noise, thd+n (%) output power (w) 200m 500m f=20khz f=1khz f=20hz v dd =5 v r l =16 btl 1
pa4835 cmos ic unisonic technologies co., ltd 11 of 15 www.unisonic.com.tw qw-r502-024-c ? typical characteristics(cont.) total harmonic distorti on +noise, thd+n (%) 10m 20m 50m 70m 100m 0.02 0.05 0.1 0.5 1 2 5 10 output power (w) 0.005 0.002 0.001 30m 200m f=1khz 0.01 v dd =5v r l =32 se f=20hz f=20khz 10m 20m 50m 100m 1 0.01 0.1 0.05 0.2 0.5 1 2 5 10 total harmonic distortion +noise, thd+n (%) output power (w) 200m 500m f=20khz f=1khz f=20hz 0.02 v dd =3.3v r l =4 btl 10m 20m 50m 30m 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 total harmonic distortion +noise, thd+n (%) output power (w) 200m 800m f=20khz f=1khz f=20h z 80m 400m v dd =3.3v r l =8 btl total harmonic distortion +noise, thd+n (%) 10m 0.02 0.05 0.1 0.2 0.5 1 2 5 10 total harmonic distorti on +noise, thd+n (%) output power (w) 20m 50m 30m 70m f=20khz f=1khz f=20h z 200m 500m 0.01 v dd =3.3 v r l =16 btl
pa4835 cmos ic unisonic technologies co., ltd 12 of 15 www.unisonic.com.tw qw-r502-024-c ? typical characteristics(cont.) 10m 20m 50m 70m 100m 0.02 0.05 0.1 0.2 0.5 1 2 5 10 output power (w) 0.01 30m 200m f=20khz f=20h z f=1khz v dd =3.3 v r l =8 se 10m 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 output power (w) 12m 20m 15m 25m 30m35m 42m 55m f=20khz f=1khz f=20hz v dd =3.3v r l =32 se power disspation, p d (w) 0 0.05 0.1 0.15 0.2 0.25 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 output power (w) 0.3 0.35 0.4 v dd =5v thd<1% se r l =32 r l =16 r l =8 power disspation, p d (w) 0 0.25 0.5 0.75 1 1.25 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 output power (w) 1.5 r l =32 r l =16 r l =8 v dd =5 v thd<1% btl
pa4835 cmos ic unisonic technologies co., ltd 13 of 15 www.unisonic.com.tw qw-r502-024-c ? typical characteristics(cont.) 123 200m 500m 300m 800m 0.005 0.02 0.05 0.1 0.5 1 2 5 10 total harmonic distortion +noise, thd+n (%) 0.002 0.001 100m output volltage (v) f=20khz f=1khz f=20hz 0.01 v dd =5v r l =20k se total harmonic distortion+noise, thd+n (%) total harmonic distortion+noise, thd+n (%) 100m 1 2 0.006 0.02 0.05 0.1 0.2 0.5 1 2 5 10 total harmonic distorti on+noise, thd+n (%) 200m 500m 300m 700m f=20khz f=1khz output volltage (v) f=20hz v dd =3.3v r l =5k docking 4 8 12 16 20 24 40 28 36 32 0 0.5 1 1.5 2 2.5 3 44 60 48 56 52 64 thd=10% thd=1% load resistance ( ) v dd =5v btl output power (w)
pa4835 cmos ic unisonic technologies co., ltd 14 of 15 www.unisonic.com.tw qw-r502-024-c ? typical characteristics(cont.) 4 8 12 16 20 24 40 28 36 32 0 0.1 0.3 0.5 0.7 0.9 1.1 44 60 48 56 52 64 0.2 0.4 0.6 0.8 1 thd=10% thd=1% load resistance ( ) v dd =3.3v btl 4 8 12 16 20 24 40 28 36 32 0 0.02 0.06 0.16 0.26 0.3 0.34 44 60 48 56 52 64 0.04 0.08 0.24 0.28 0.32 thd=10% 0.2 0.18 0.22 0.12 0.14 0.1 thd=1% v dd =3.3v se load resistance ( ) gain (dbv) supply current, i dd (ma) 2.5 3 3.5 4 4.5 5 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2 thd=10% 5.5 thd=1% supply voltage, v dd (v) output power (w) v dd =5v r l =8 btl
pa4835 cmos ic unisonic technologies co., ltd 15 of 15 www.unisonic.com.tw qw-r502-024-c 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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