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tda8942p 2 x 1.5 w (3 w music power) stereo bridge tied load (btl) audio ampli?er rev. 03 02 september 2003 product data 1. general description the tda8942p is a dual-channel audio power ampli?er for an output power of 2 1.5 w at a 16 w load and a 9 v supply. the ampli?er is even capable of delivering 2 3 w music power at an 8 w load. the circuit contains two bridge tied load (btl) ampli?ers with an all-npn output stage and standby/mute logic. the tda8942p comes in a 16-pin dual in-line (dip) package.the tda8942p is printed-circuit board (pcb) compatible with all other types in the tda894x family. one pcb footprint accommodates both the mono and the stereo products. 2. features n few external components n fixed gain n standby and mute mode n no on/off switching plops n low standby current n high supply voltage ripple rejection n outputs short-circuit protected to ground, supply and across the load n thermally protected n printed-circuit board compatible n output power up to 2 3 w music power (limited by thermal resistance). 3. applications n mains fed applications (e.g. tv sound) n pc audio n portable audio.
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 2 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 4. quick reference data [1] measured on 1 channel simultaneously. 5. ordering information table 1: quick reference data symbol parameter conditions min typ max unit v cc supply voltage 6 9 18 v i q quiescent supply current v cc =12v; r l = - 2232ma i stb standby supply current - - 10 m a p o output power thd = 10 %; v cc =9v r l =16 w 1.2 1.5 - w r l =8 w [1] -3-w thd total harmonic distortion p o = 0.5 w - 0.03 0.3 % g v voltage gain 31 32 33 db svrr supply voltage ripple rejection 50 65 - db table 2: ordering information type number package name description version tda8942p dip16 plastic dual in-line package; 16 leads (300 mil); long body sot38-1
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 3 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 6. block diagram 7. pinning information 7.1 pinning fig 1. block diagram. i dth mgl578 standby/ mute logic short-circuit and temperature protection 20 k w 20 k w 12 11 10 7 4 14 v cc1 v cc 16 1 out2 + gnd1 8 gnd2 svr out2 - in2 - in2 + 13 tda8942p 3 2 15 v cc2 9 out1 + out1 - in1 - in1 + mode fig 2. pin con?guration. handbook, halfpage tda8942p mgr895 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 mode svr in1 + in1 - in2 - in2 + n.c. n.c. out1 - out2 + v cc1 v cc2 gnd2 gnd1 out1 + out2 -
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 4 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 7.2 pin description table 3: pin description symbol pin description v cc1 1 supply voltage channel 1 out1+ 2 positive loudspeaker terminal 1 in1+ 3 positive input 1 mode 4 mode selection input (standby, mute, operating) n.c. 5 not connected n.c. 6 not connected out2 - 7 negative loudspeaker terminal 2 gnd2 8 ground channel 2 v cc2 9 supply voltage channel 2 out2+ 10 positive loudspeaker terminal 2 in2+ 11 positive input 2 in2 - 12 negative input 2 in1 - 13 negative input 1 svr 14 half supply voltage decoupling (ripple rejection) out1 - 15 negative loudspeaker terminal 2 gnd1 16 ground channel 1
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 5 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 8. functional description the tda8942p is a stereo btl audio power ampli?er capable of delivering 2 1.5 w output power to a 16 w load at thd = 10 %, using a 9 v power supply. the voltage gain is ?xed at 32 db. with the three-level mode input the device can be switched from standby to mute and to operating mode. the tda8942p outputs are protected by an internal thermal shutdown protection mechanism and a short-circuit protection. 8.1 input con?guration the tda8942p inputs can be driven symmetrical (?oating) as well as asymmetrical. in the asymmetrical mode one input pin is connected via a capacitor to the signal ground which should be as close as possible to the svr (electrolytic) capacitor ground. note that the dc level of the input pins is half of the supply voltage v cc , so coupling capacitors for both pins are necessary. the input cut-off frequency is: (1) for r i =45k w and c i = 220 nf: (2) as shown in equation 1 and equation 2 , large capacitor values for the inputs are not necessary; so the switch-on delay during charging of the input capacitors can be minimized. this results in a good low frequency response and good switch-on behavior. remark: to prevent hf oscillations do not leave the inputs open: connect a capacitor of at least 1.5 nf across the input pins close to the device. f i cut off C () 1 2 p r i c i () ---------------------------- - = f i cut off C () 1 2 p 45 10 3 220 10 9 C () ---------------------------------------------------------------- - 16 hz ==
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 6 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 8.2 power ampli?er the power ampli?er is a btl ampli?er with an all-npn output stage, capable of delivering a peak output current of 2 a. the btl principle offers the following advantages: ? lower peak value of the supply current ? ripple frequency on the supply voltage is twice the signal frequency ? no expensive dc-blocking capacitor ? good low frequency performance. 8.2.1 output power measurement the output power as a function of the supply voltage is measured on the output pins at thd = 10 %; see figure 8 . the maximum output power is limited by the maximum power dissipation in the plastic dual in-line (dip16) package. see also section 14.3 . 8.2.2 headroom typical cd music requires at least 12 db (factor 15.85) dynamic headroom C compared to the average power output C for transferring the loudest parts without distortion. at v cc =9v, r l =16 w and p o =1w at thd=1% (see figure 6a ), the average listening level (all) C music power C without any distortion yields: p o(all) = 1 w/15.85 = 63 mw. the power dissipation can be derived from figure 11 for 0 db respectively 12 db headroom. for the average listening level a power dissipation of 1.15 w can be used for calculation of the maximum ambient temperature t amb(max) (see section 14.3 ). ta b l e 4 shows the power rating as a function of headroom for peak music power into 2 channels for both 1 w and 3 w. 8.3 mode selection the tda8942p has three functional modes, which can be selected by applying the proper dc voltage to pin mode. see figure 4 and figure 5 for the respective dc levels, which depend on the supply voltage level. the mode pin can be driven by a 3-state logic output stage e.g. a microcontroller with additional components for dc-level shifting. table 4: power rating as function of headroom headroom power output (thd = 1 %) power dissipation (p) 1 w peak music power 0db p o = 1 w 2.35 w 12 db p o(all) = 63 mw 1.15 w 3 w peak music power 0db p o = 3 w 4.3 w 12 db p o(all) = 189 mw 2.17 w
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 7 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. standby in this mode the current consumption is very low and the outputs are ?oating. the device is in standby mode when (v cc - 0.5 v) < v mode philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 8 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 9. limiting values 10. thermal characteristics 11. static characteristics [1] with a load connected at the outputs the quiescent current will increase, the maximum of this increase being equal to the di fferential output voltage offset (d v out ) divided by the load resistance (r l ). [2] the dc output voltage with respect to ground is approximately 0.5v cc . [3] d v out = ? v out+ - v out - ? table 5: limiting values in accordance with the absolute maximum rating system (iec 60134). symbol parameter conditions min max unit v cc supply voltage no signal - 0.3 +25 v operating - 0.3 +18 v v i input voltage - 0.3 v cc + 0.3 v i orm repetitive peak output current - 2 a t stg storage temperature non-operating - 55 +150 c t amb ambient temperature - 40 +85 c p tot total power dissipation - 2.2 w v cc(sc) supply voltage to guarantee short-circuit protection -12v table 6: thermal characteristics symbol parameter conditions value unit r th(j-a) thermal resistance from junction to ambient in free air 57 k/w table 7: static characteristics v cc =9v; t amb =25 c; r l =8 w ; v mode =0v; v i = 0 v; measured in test circuit figure 14 ; unless otherwise speci?ed. symbol parameter conditions min typ max unit v cc supply voltage operating 6 9 18 v i q quiescent supply current r l = [1] -2232ma i stb standby supply current v mode =v cc --10 m a v o dc output voltage [2] - 4.5 - v d v out differential output voltage offset [3] - - 200 mv v mode mode selection input voltage operating mode 0 - 0.5 v mute mode 3 - v cc - 1.5 v standby mode v cc - 0.5 - v cc v i mode mode selection input current 0 < v mode philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 9 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 12. dynamic characteristics [1] measured on 1 channel simultaneously. [2] the noise output voltage is measured at the output in a frequency range from 20 hz to 20 khz (unweighted), with a source impedan ce r s =0 w at the input. [3] supply voltage ripple rejection is measured at the output, with a source impedance r s =0 w at the input. the ripple voltage is a sine wave with a frequency f ripple and an amplitude of 700 mv (rms), which is applied to the positive supply rail. [4] output voltage in mute mode is measured with an input voltage of 1 v (rms) in a bandwidth of 20 khz, so including noise. fig 3. quiescent supply current as function of supply voltage. fig 4. quiescent supply current as function of mode selection voltage. handbook, halfpage 50 40 30 20 10 0 0481216 v cc (v) i q (ma) 20 mgl990 handbook, halfpage 50 40 30 20 10 0 02468 v mode (v) i q (ma) 10 12 mgl991 v cc = 11 v 9 v table 8: dynamic characteristics v cc =9v; t amb =25 c; r l =8 w ; f = 1 khz; v mode = 0 v; measured in test circuit figure 14 ; audio pass band 22 hz to 22 khz; unless otherwise speci?ed. symbol parameter conditions min typ max unit p o output power thd = 10 %; r l =16 w 1.2 1.5 - w thd = 10 %; r l =8 w [1] -3-w thd = 0.5 %; r l =8 w 0.8 1 - w thd total harmonic distortion p o = 0.5 w - 0.03 0.3 % g v voltage gain 31 32 33 db z i(dif) differential input impedance 70 90 110 k w v n(o) noise output voltage [2] - 90 120 m v svrr supply voltage ripple rejection f ripple = 1 khz [3] 50 65 - db f ripple = 100 hz to 20 khz [3] -60-db v o(mute) output voltage in mute mode [4] --50 m v a cs channel separation r s =0 w 50 75 - db
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 10 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. fig 5. output voltage as function of mode selection voltage. handbook, full pagewidth v mode (v) 12 mgl993 8 4 2610 0 v o (v) 10 1 10 - 3 10 - 2 10 - 1 10 - 4 10 - 5 v cc = 11 v 9 v a. v cc =9v; r l =16 w ; f = 1 khz. b. v cc =11v; r l =25 w ; f = 1 khz. fig 6. total harmonic distortion as function of output power. handbook, halfpage thd (%) 10 - 2 10 1 10 - 1 p o (w) 10 2 10 1 10 - 1 10 - 2 mgl986 ch2 ch1 handbook, halfpage thd (%) 10 - 2 10 1 10 - 1 p o (w) 10 2 10 1 10 - 1 10 - 2 mgl987 ch2 ch1
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 11 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. a. p o = 0.1 w; v cc =9v; r l =16 w .b.p o = 0.5 w; v cc =9v; r l =16 w . no bandpass ?lter applied. fig 7. total harmonic distortion as function of frequency. handbook, halfpage thd (%) 10 10 5 10 2 10 3 10 4 f (hz) 1 10 10 - 1 10 - 2 mgl989 ch2 ch1 handbook, halfpage thd (%) 10 10 5 10 2 10 3 10 4 f (hz) 1 10 10 - 1 10 - 2 mgl988 ch2 ch1 thd = 10 %; f = 1 khz. f = 1 khz. fig 8. output power as function of supply voltage. fig 9. total power dissipation as function of supply voltage. handbook, halfpage p o (w) 0 5 10 15 v cc (v) 5 3 4 1 0 2 mdb590 r l = 8 w r l = 16 w r l = 25 w handbook, halfpage 3 2 2.5 1 0.5 1.5 0 02468 v cc (v) p tot (w) 14 10 12 mgl996 r l = 16 w 25 w
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 12 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. (1) v cc =9v. (2) v cc =11v. (1) v cc =9v; r l =16 w . (2) v cc = 11 v; r l =25 w . fig 10. ef?ciency as function of output power. fig 11. power dissipation as function of output power. no bandpass ?lter applied. fig 12. channel separation as function of frequency. handbook, halfpage 100 80 60 40 20 0 0 0.5 1 1.5 2 p o (w) h (%) 2.5 mgl998 (1) (2) handbook, halfpage 3 2.5 2 1.5 1 0.5 0 0 0.5 1 1.5 2 p o (w) p (w) 2.5 mgl997 (1) (2) handbook, halfpage 0 - 20 - 40 - 60 - 80 - 100 10 10 2 10 3 10 4 10 5 f (hz) a cs (db) mgl994
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 13 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. v cc =9v; r s =0 w ; v ripple = 700 mv (rms); no bandpass ?lter applied. curves a: inputs short-circuited. curves b: inputs short-circuited and connected to ground (asymmetrical application). fig 13. supply voltage ripple rejection as function of frequency. handbook, full pagewidth svrr (db) 10 2 10 3 10 4 10 5 10 f (hz) - 20 0 - 40 - 60 - 80 mgl992 ch1 b a ch2
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 14 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 13. internal circuitry table 9: internal circuitry pin symbol equivalent circuit 3 and 13 in1+ and in1 - 11 and 12 in2+ and in2 - 15 and 2 out1 - and out1+ 7 and 10 out2 - and out2+ 4 mode 14 svr 1.5 k w 1.5 k w 45 k w 45 k w v cc v cc v cc mgu070 1/2 v cc (svr) 13, 12 3, 11 40 w 100 w mgu071 2, 7, 10, 15 1/2 v cc 1 k w 20 k w off high mute high 1 k w v cc v cc v cc mgu073 4 standby 20 k w 20 k w v cc mgu072 14
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 15 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 14. application information 14.1 application diagram fig 14. application diagram. handbook, full pagewidth 1 9 out1 - - - - + + + + - r l 16 w r i 45 k w r s symmetrical input r i 45 k w r l 16 w out1 + in1 - in1 + out2 - out2 + gnd1 gnd2 mgl999 in2 - in2 + mode svr 15 13 220 nf 3 12 11 4 14 2 7 10 8 16 v cc v cc2 v cc1 1000 m f 100 nf 20 k w 20 k w 10 m f - - - + + + + - r i 45 k w r i 45 k w 30 k w 30 k w 30 k w r c1 c2 r v cc v cc signal gnd tda8942p signal gnd short-circuit and temperature protection standby/ mute logic microcontroller standby mode mute on 0 0 1 0 c1 c2 1 0 0.5 v cc 220 nf 1.5 nf 1.5 nf c i r s asymmetrical input 220 nf 220 nf c i 0.5 v cc 0.5 v cc 0.5 v cc 0.5 v cc
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 16 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 14.2 printed-circuit board 14.2.1 layout and grounding for a high system performance level certain grounding techniques are essential. the input reference grounds have to be tied with their respective source grounds and must have separate tracks from the power ground tracks; this will prevent the large (output) signal currents from interfering with the small ac input signals. the small-signal ground tracks should be physically located as far as possible from the power ground tracks. supply and output tracks should be as wide as possible for delivering maximum output power. fig 15. printed-circuit board layout (single-sided); components view. i dth mgu067 on mute 220 nf 220 nf 100 nf 1.5 nf 1000 m f 10 m f 1 +- in1 - in1 + in2 - in2 + out1 + out1 - out2 + out2 - v cc gnd 54 mm 56 mm
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 17 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 14.2.2 power supply decoupling proper supply bypassing is critical for low-noise performance and high supply voltage ripple rejection. the respective capacitor locations should be as close as possible to the device and grounded to the power ground. proper power supply decoupling also prevents oscillations. for suppressing higher frequency transients (spikes) on the supply line a capacitor with low esr C typical 100 nf C has to be placed as close as possible to the device. for suppressing lower frequency noise and ripple signals, a large electrolytic capacitor C e.g. 1000 m f or greater C must be placed close to the device. the bypass capacitor on the svr pin reduces the noise and ripple on the mid rail voltage. for good thd and noise performance a low esr capacitor is recommended. 14.3 thermal behavior and t amb(max) calculation the measured maximum thermal resistance of the ic package, r th(j-a) is 57 k/w. a calculation for the maximum ambient temperature can be made, with the following parameters: v cc = 9 v and r l =16 w t j(max) = 150 c r th(tot) is the total thermal resistance between the junction and the ambient. at v cc = 9 v and r l =16 w the measured worst-case sine-wave dissipation is 2.35 w; see figure 11 . for t j(max) = 150 c the maximum ambient temperature is: t amb(max) = 150 C 2.35 57=16 c the calculation above is for an application at worst-case (stereo) sine-wave output signals. in practice music signals will be applied, which decreases the maximum power dissipation to approximately half of the sine-wave power dissipation (see section 8.2.2 ). for t j(max) = 150 c the maximum ambient temperature is: t amb(max) = 150 C 1.15 57 = 84.5 c to increase the lifetime of the ic, t j(max) should be reduced to 125 c. this results in: t amb(max) = 125 C 1.15 57 = 59.5 c 15. test information 15.1 quality information the general quality speci?cation for integrated circuits, snw-fq-611 is applicable. 15.2 test conditions t amb =25 c; v cc = 9 v; f = 1 khz; r l =16 w ; audio pass band 22 hz to 22 khz; unless otherwise speci?ed. in the graphs as function of frequency no bandpass ?lter was applied; see figure 7 , 12 and 13 .
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 18 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 16. package outline fig 16. dip16 package outline. unit a max. 1 2 b 1 cee m h l references outline version european projection issue date iec jedec jeita mm inches dimensions (inch dimensions are derived from the original mm dimensions) sot38-1 99-12-27 03-02-13 a min. a max. b max. w m e e 1 1.40 1.14 0.055 0.045 0.53 0.38 0.32 0.23 21.8 21.4 0.86 0.84 6.48 6.20 0.26 0.24 3.9 3.4 0.15 0.13 0.254 2.54 7.62 0.3 8.25 7.80 0.32 0.31 9.5 8.3 0.37 0.33 2.2 0.087 4.7 0.51 3.7 0.15 0.021 0.015 0.013 0.009 0.01 0.1 0.02 0.19 050g09 mo-001 sc-503-16 m h c (e ) 1 m e a l seating plane a 1 w m b 1 e d a 2 z 16 1 9 8 b e pin 1 index 0 5 10 mm scale note 1. plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. (1) (1) d (1) z dip16: plastic dual in-line package; 16 leads (300 mil); long body sot38-1
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 19 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 17. soldering 17.1 introduction to soldering through-hole mount packages this text gives a brief insight to wave, dip and manual soldering. a more in-depth account of soldering ics can be found in our data handbook ic26; integrated circuit packages (document order number 9398 652 90011). wave soldering is the preferred method for mounting of through-hole mount ic packages on a printed-circuit board. 17.2 soldering by dipping or by solder wave driven by legislation and environmental forces the worldwide use of lead-free solder pastes is increasing. typical dwell time of the leads in the wave ranges from 3 to 4 seconds at 250 c or 265 c, depending on solder material applied, snpb or pb-free respectively. the total contact time of successive solder waves must not exceed 5 seconds. the device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the speci?ed maximum storage temperature (t stg(max) ). if the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. 17.3 manual soldering apply the soldering iron (24 v or less) to the lead(s) of the package, either below the seating plane or not more than 2 mm above it. if the temperature of the soldering iron bit is less than 300 c it may remain in contact for up to 10 seconds. if the bit temperature is between 300 and 400 c, contact may be up to 5 seconds. 17.4 package related soldering information [1] for sdip packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board. [2] for pmfp packages hot bar soldering or manual soldering is suitable. table 10: suitability of through-hole mount ic packages for dipping and wave soldering methods package soldering method dipping wave dbs, dip, hdip, sdip, sil suitable suitable [1] pmfp [2] - not suitable
philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er product data rev. 03 02 september 2003 20 of 22 9397 750 11707 ? koninklijke philips electronics n.v. 2003. all rights reserved. 18. revision history table 11: revision history rev date cpcn description 03 20030902 - product data (9397 750 11707) modi?cations: ? updated section 1 general description ? added one feature in section 2 features ? added one condition for the output power in section 4 quick reference data ? updated table 4 power rating as function of headroom ? added one condition for the output power in section 12 dynamic characteristics ? replaced figure 8 output power as function of supply voltage. 02 20000314 - product data (9397 750 06862) 01 19990414 - preliminary data (9397 750 04879)
9397 750 11707 philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er ? koninklijke philips electronics n.v. 2003. all rights reserved. product data rev. 03 02 september 2003 21 of 22 contact information for additional information, please visit http://www.semiconductors.philips.com . for sales of?ce addresses, send e-mail to: sales.addresses@www.semiconductors.philips.com . fax: +31 40 27 24825 19. data sheet status [1] please consult the most recently issued data sheet before initiating or completing a design. [2] the product status of the device(s) described in this data sheet may have changed since this data sheet was published. the l atest information is available on the internet at url http://www.semiconductors.philips.com. [3] for data sheets describing multiple type numbers, the highest-level product status determines the data sheet status. 20. de?nitions short-form speci?cation the data in a short-form speci?cation is extracted from a full data sheet with the same type number and title. for detailed information see the relevant data sheet or data handbook. limiting values de?nition limiting values given are in accordance with the absolute maximum rating system (iec 60134). stress above one or more of the limiting values may cause permanent damage to the device. these are stress ratings only and operation of the device at these or at any other conditions above those given in the characteristics sections of the speci?cation is not implied. exposure to limiting values for extended periods may affect device reliability. application information applications that are described herein for any of these products are for illustrative purposes only. philips semiconductors make no representation or warranty that such applications will be suitable for the speci?ed use without further testing or modi?cation. 21. disclaimers life support these products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. philips semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify philips semiconductors for any damages resulting from such application. right to make changes philips semiconductors reserves the right to make changes in the products - including circuits, standard cells, and/or software - described or contained herein in order to improve design and/or performance. when the product is in full production (status production), relevant changes will be communicated via a customer product/process change noti?cation (cpcn). philips semiconductors assumes no responsibility or liability for the use of any of these products, conveys no licence or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise speci?ed. level data sheet status [1] product status [2][3] de?nition i objective data development this data sheet contains data from the objective speci?cation for product development. philips semiconductors reserves the right to change the speci?cation in any manner without notice. ii preliminary data quali?cation this data sheet contains data from the preliminary speci?cation. supplementary data will be published at a later date. philips semiconductors reserves the right to change the speci?cation without notice, in order to improve the design and supply the best possible product. iii product data production this data sheet contains data from the product speci?cation. philips semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. relevant changes will be communicated via a customer product/process change noti?cation (cpcn).
? koninklijke philips electronics n.v. 2003. printed in the netherlands all rights are reserved. 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. no liability will be accepted by the publisher for any consequence of its use. publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. date of release: 02 september 2003 document order number: 9397 750 11707 contents philips semiconductors tda8942p 2 x 1.5 w (3 w music power) stereo btl audio ampli?er 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 quick reference data . . . . . . . . . . . . . . . . . . . . . 2 5 ordering information . . . . . . . . . . . . . . . . . . . . . 2 6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 pinning information . . . . . . . . . . . . . . . . . . . . . . 3 7.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 8 functional description . . . . . . . . . . . . . . . . . . . 5 8.1 input con?guration . . . . . . . . . . . . . . . . . . . . . . 5 8.2 power ampli?er . . . . . . . . . . . . . . . . . . . . . . . . . 6 8.2.1 output power measurement . . . . . . . . . . . . . . . 6 8.2.2 headroom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8.3 mode selection . . . . . . . . . . . . . . . . . . . . . . . . . 6 8.3.1 switch-on and switch-off. . . . . . . . . . . . . . . . . . 7 8.4 supply voltage ripple rejection . . . . . . . . . . . . . 7 8.5 built-in protection circuits . . . . . . . . . . . . . . . . . 7 8.5.1 short-circuit protection . . . . . . . . . . . . . . . . . . . 7 8.5.2 thermal shutdown protection . . . . . . . . . . . . . . 7 9 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 8 10 thermal characteristics. . . . . . . . . . . . . . . . . . . 8 11 static characteristics. . . . . . . . . . . . . . . . . . . . . 8 12 dynamic characteristics . . . . . . . . . . . . . . . . . . 9 13 internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . 14 14 application information. . . . . . . . . . . . . . . . . . 15 14.1 application diagram . . . . . . . . . . . . . . . . . . . . 15 14.2 printed-circuit board . . . . . . . . . . . . . . . . . . . . 16 14.2.1 layout and grounding . . . . . . . . . . . . . . . . . . . 16 14.2.2 power supply decoupling . . . . . . . . . . . . . . . . 17 14.3 thermal behavior and t amb(max) calculation . . 17 15 test information . . . . . . . . . . . . . . . . . . . . . . . . 17 15.1 quality information . . . . . . . . . . . . . . . . . . . . . 17 15.2 test conditions . . . . . . . . . . . . . . . . . . . . . . . . 17 16 package outline . . . . . . . . . . . . . . . . . . . . . . . . 18 17 soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 17.1 introduction to soldering through-hole mount packages . . . . . . . . . . . . . . . . . . . . . . 19 17.2 soldering by dipping or by solder wave . . . . . 19 17.3 manual soldering . . . . . . . . . . . . . . . . . . . . . . 19 17.4 package related soldering information . . . . . . 19 18 revision history . . . . . . . . . . . . . . . . . . . . . . . . 20 19 data sheet status . . . . . . . . . . . . . . . . . . . . . . . 21 20 de?nitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 21 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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