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january 2011 doc id 6326 rev 4 1/12 12 tda7391pd 32 w bridge car radio amplifier features high power capability: ? 40 w/3.2 eiaj ? 32 w/3.2 @ v s = 14.4 v, f = 1 khz, d = 10 % ? 26 w/4 @ v s = 14.4 v, f = 1 khz, d = 10 % differential inputs (eit her single ended or differential input signal are accepted) minimum external component count: ? no bootstrap capacitors ? no boucherot cells ? internally fixed gain (30 db) ? no svr capacitor standby function (cmos compatible) programmable turn-on/off delay no audible pop during mute and stand-by operations protections short circuit (to gnd, to v s , across the load) very inductive loads chip over temperature load dump open gnd esd description the tda7391pd is a bridge class ab audio power amplifier specially intended for car radio high power applications. the high power capab ility together with the possibility to operate either in differential input mode or single ended input mode makes it suitable for boosters and high end car radio equipment. the exclusive fully complementary output stage and the internal fixed gain configuration drop the external component count. the on board clipping detector allows easy implementation of gain compression systems. powerso20 '!0'03 powerso20 (slug-up) '!0'03 table 1. device summary order code package packing e-tda7391pd powerso20 tube e-tda7391pdtr powerso20 tape and reel tda7391pdu powerso20 (slug-up) tube tda7391pdutr powerso20 (slug-up) tape and reel www.st.com
contents tda7391pd 2/12 doc id 6326 rev 4 contents 1 test and application circuit, bl ock diagram . . . . . . . . . . . . . . . . . . . . . . 3 2 pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.4 electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
tda7391pd test and application circuit, block diagram doc id 6326 rev 4 3/12 1 test and application circuit, block diagram figure 1. test and application circuit figure 2. block diagram ). # m & # m & ). 34 "9 /54 /54 6ref #$ 4$!0$ 2 + 7 # m & '.$ 2 + 7 # m & #n& 4/ m # 6 3 6 3 37 '!0'03 6 ## 6 ## 2%&%2%.#%3 34!.$"94(2%3(/,$ 3(/24#)2#5)4 $5-04(%2-!, 02/4%#4)/. )#- #/--/. -/$% 6 ## gm -54%4(2%3(/,$ 02/'2!--!",% #522%.4#)2#5)4 ,4 3 6f4j 0/7%2!-0 0/7%2!-0 4($ $%4%#4 ,4 3 $)3!",% ). ). /54 #$ /54 -54% 39.# 3 '.$ 34!.$"9 6 3 0 '.$ '!0'03
pins description tda7391pd 4/12 doc id 6326 rev 4 2 pins description figure 3. pins connection (top view) table 2. pins function pin function description 14, 15 inputs the input stage is a high impedance type al so capable of operation in single ended mode with one input capacitively coupled to the signal gnd. the impedance seen by the inverting and non inverting input pins must be matched. 5, 16 + v s supply voltage. 17 cd the tda7391pd is equipped with a diagnostic circuitry able to detect the clipping in the output signal (distortion = 10%). the cd pin (open collector) gives out low level signal during clipping. 2, 19 outputs the output stage is a bridge type able to drive loads as low as 3.2 . it consists of two class ab fully complementary pnp/npn stages fully protected. a rail to rail output voltage swing is achieved without need of bootstrap capacitors. no external compensation is necessary. 1, 10, 11, 20 gnd power ground. 12 s-gnd signal ground. 4 stand-by the device features a st-by function which shuts down all the internal bias supplies when the st-by pin is low. in st-by mode the amplifier sinks a small current (in the range of few a). when the st-by pin is high the ic becomes fully operational. 8 sync a resistor (r 2 ) has to be connect between pin 8 and gnd in order to program the current that flows in the c 3 capacitor (pin 9). the values of c 3 and r 2 determine the time required to bias the amplifier. 9mute the pin will have a capacitor (c 3 ) tied to gnd to set the mute/stand-by time. an automatic mute during turn on/off is provided to prevent noisy transients. 0 '.$ -54% 39.# .# .# 34 "9 6## .# /54 /54 .# #$ ). 6## ). .# 3 '.$ 0 '.$ 0 '.$ 0 '.$ 0 '.$ /54 .# 34 "9 6## .# .# 39.# -54% 3 '.$ .# ). 6## ). #$ .# /54 0 '.$ 3lug up 0 '.$ 0 '.$ '!0'03
tda7391pd electrical specifications doc id 6326 rev 4 5/12 3 electrical specifications 3.1 absolute maximum ratings 3.2 thermal data 3.3 electrical characteristics table 3. absolute maximum ratings symbol parameter value unit v s dc supply voltage 28 v v op operating supply voltage 18 v v peak peak supply voltage (t = 50 ms) 50 v i o output peak current repetitive (f > 10 hz) 4.5 a output peak current non repetitive 6 a p tot power dissipation (t case = 85 c) 32 w t stg , t j storage and junction temperature -40 to 150 c table 4. thermal data symbol parameter value unit r th j-case thermal resistance junc tion-to-case max. 2 c/w table 5. electrical characteristics (v s = 14.4 v; r l = 4 , f = 1 khz, t amb = 25 c, unless otherwise specified) symbol parameter test condition min. typ. max. unit v s supply voltage range - 8 - 18 v i q total quiescent current - - 60 150 ma v os output offset voltage - - - 120 mv i sb standby current v st-by = 1.5 v - - 100 a i sbin standby input bias current v st-by = 5 v - - 10 a v sbon standby on threshold voltage - - - 1.5 v v sboff standby off threshold voltage - 3.5 - - v at t standby standby attenuation - - 90 - db i m in mute input bias current (v mute = 5 v) - - 10 a a m mute attenuation - - 90 - db
electrical specifications tda7391pd 6/12 doc id 6326 rev 4 3.4 electrical characteristics curves p o output power d = 10 % 20 26 - w d = 1 % - 21 - w d = 10 %; r l = 3.2 -32-w p o eiaj eiaj output power (*) v s = 13.7 v - 40 - w d distortion - - 0.06 - % p o = 0.1 to 15 w - 0.03 - % g v voltage gain - 29.5 30 30.5 db f h high frequency rolloff p o = 1 w; -3 db 75 - - khz r in input impedance differential 36 60 - k single ended 30 55 - k e in input noise voltage r g = 0 ; f = 22 hz to 22 khz - 4 - mv cmrr input common mode rejection f = 1 khz; v in = 1 v rms -65-db svr supply voltage rejection r g = 0 ; v r = 1 vrms - 60 - db cdl clipping detection level - - 10 - % t sd absolute thermal shutdown junction temperature - - 160 - c figure 4. quiescent current vs. supply voltage figure 5. eiaj power vs. supply voltage table 5. electrical characteristics (continued) (v s = 14.4 v; r l = 4 , f = 1 khz, t amb = 25 c, unless otherwise specified) symbol parameter test condition min. typ. max. unit
tda7391pd electrical specifications doc id 6326 rev 4 7/12 figure 6. output power vs. supply voltage (@r l = 4 ) figure 7. distortion vs. frequency (@ r l = 4 ) figure 8. output power vs. supply voltage (@r l = 3.2 ) figure 9. distortion vs. frequency (@ r l = 3.2 ) figure 10. supply voltage rejection vs. frequency figure 11. common mode rejection vs. frequency
electrical specifications tda7391pd 8/12 doc id 6326 rev 4 figure 12. total power dissipation and effic. vs. output power (@r l = 4 ) figure 13. power bandwidth
tda7391pd package information doc id 6326 rev 4 9/12 4 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark. figure 14. powerso20 mechanical data and package dimensions /54,).%!.$ -%#(!.)#!,$!4! e a ! % a 03/-%# $%4!),! 4 $ % % hx? $%4!),! lead slug a 3 'age0lane , $%4!)," 2 $%4!)," #/0,!.!2)49 '# # 3%!4).'0,!.% e b c . . ( "/44/-6)%7 % $ $)- mm inch -). 490 -!8 -). 490 -!8 ! a a a b c $ $ % e e % % % ' ( h , . ?typ 3 ?max 4 h$and%vdonotincludemoldflashorprotusions -oldflashorprotusionsshallnotexceedmmv #riticaldimensionsh%vh'vandhav &orsubcontractorsthelimitistheonequotedinjedec-/ 0ower3/ ) *%$ %#-/ 7eight gr '!0'03
package information tda7391pd 10/12 doc id 6326 rev 4 figure 15. powerso20 (slug-up) mechanical data and package dimensions /54,).%!.$ -%#(!.)#!,$!4 ! e ! ! % a ! $x - 03/$-% $ % % % hx? 3 'age0lane , $%4!),! $%4!),! #/0,!.!2)49 '# # 3%!4).'0,!.% e b c . ( . 6 % $ ! 2 $)- mm inch -) . 490 -!8 -). 490 -!8 ! ! ! ! a b c $ $ $ % % % % e e ' ( h , . _max 2 3 _min _max 6 _min _max ?$a nd%? donotincludemoldflashorprotusions -oldflashorprotusionsshallnotexceedmm? #riticaldimensions? %? ? a? ?e? and?' ? 0ower3/3lug up # '!0'03
tda7391pd revision history doc id 6326 rev 4 11/12 5 revision history added table 6. document revision history date revision changes 10-oct-1998 1 initial release. 02-jul-2008 2 document reformatted. document status prom oted from product preview to datasheet. added table 1: device summary . added ecopack description in section 5: package information . 19-apr-2010 3 updated table 1: device summary . 26-jan-2011 4 updated table 1: device summary . added powerso20 (slug-up) drawing in figure 3 . added powerso20 (slug-up) in section 4: package information .
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